问:
Disable lock screen with root or xposed in android 9
I have an ASUS ZenFone Go (ZC500TG) running phh's Treble GSI Android 9 AOSP. I have both Magisk root and EdXposed (SandHook) Magisk Module installed.

My problem is that my school email requires me to have a lock screen set up to receive emails. This is really annoying. If I don't set up a lock screen, this message below pops up and there is no way to remove the notification. It seems that "Swipe to unlock" doesn't count as a lockscreen.

I also tried an Exposed Module, Lock screen Disabler. Unfortunately, it only supports Android 6 and below. I tried installing the Module on my phone and it doesn't work. The module hasn't been updated in a while from the creator.

I'm currently open to any solution that can disable the lockscreen and receive emails from my school, using a Magisk module, Xposed module or with root.

Extra info:

From my findings, it seems that Google Play Services has a service that detects whether there is a lockscreen present on the phone. The service is "Screen lock service". Unfortunately, I also tried disabling the service but it would reenable itself after a reboot. The service can be found at: Settings --> Security & location --> Device admin apps. It is a pain in the ass to disable the service everytime I did a reboot. (I do a lot of testing on the phone so it is normal for me to reboot frequently in a day).

I am also open to a solution where I can permanently disable this service and I don't need to set up a lockscreen. Root, Magisk module or Xposed module is okay.


问:
Some file types copied onto phone always disappear
Whenever I try to copy files onto my phone, depending on file type they almost immediately disappear.
I noticed this when trying to copy music files (mp3 and flac) from my PC to the phone via the USB cable, using total commander.

What works: png, doc, pdf, xlsx

What gets deleted: mp3, flac, wav, somefile.someextension

I copy the file(s), and they disappear. Sometimes it happens immediately, sometimes it needs a few seconds, a couple of refreshes, or navigating away from the folder and back in again. Sometimes I can see the file from my PC but not on the phone screen for a while (up to a minute). But the end result is always the same, the files soon disappear.

I don't think the files are being moved anywhere on the phone, as I tried searching the entire phone for the missing files and found nothing (no mp3 files on the entire phone), while I can still find other file types just fine.

The phone only has internal storage, no SD card. I can browse its contents just fine from the PC, and like I said this only affects certain file types.

I've also tried copying from a USB stick (one that has a mini-usb on one end so it plugs into the phone), and I also tried several file managers to do the copying, the results are always the same.

I tried copying to the Music folder, and to another custom folder, no change in behavior.

I tried adding a .nomedia file to the folder I'm copying to, it didn't help.

I tried using MTP or PTP connections.

I don't know if any apps are doing this, but I tried disabling the built-in "Files by Google" app, and stopping all other apps. I really don't have a lot of apps on this phone, and I have no idea which one could be doing something like this and why.

The only somewhat relevant question I found was this one , but that's about bluetooth, and I'm using a USB connection to a PC.

Please someone let me know how to use a modern smartphone to provide the functionality of a fifteen year old mp3 player.

Edit:

I did a factory reset, then tried developer mode and adb. I tried both before and after the system has updated.

ls doesn't show any of the files that I tried to copy.
Here is what I think is the relevant part of adb logcat while copying a file called Gemini.mp3: https://pastebin.com/bmTaLfgk

Basically there are a couple of these:

```<code>Access denied finding property "media.stagefright.extractremote"
Access denied finding property "media.metrics.enabled"
Access denied finding property "media.metrics.enabled"
</code>```

and these:

```<code>mediaserver: type=1400 audit(0.0:524): avc: denied { read } for name="u:object_r:media_prop:s0" dev="tmpfs" ino=8498 scontext=u:r:mediaserver:s0 tcontext=u:object_r:media_prop:s0 tclass=file permissive=0
Binder:1257_2: type=1400 audit(0.0:525): avc: denied { read } for name="u:object_r:media_prop:s0" dev="tmpfs" ino=8498 scontext=u:r:mediaextractor:s0 tcontext=u:object_r:media_prop:s0 tclass=file permissive=0
Binder:1257_2: type=1400 audit(0.0:526): avc: denied { read } for name="u:object_r:media_prop:s0" dev="tmpfs" ino=8498 scontext=u:r:mediaextractor:s0 tcontext=u:object_r:media_prop:s0 tclass=file permissive=0
</code>```

And then something called MediaSorter decides to remove the file.

```<code>MediaSorter: Removing /storage/emulated/0/Music/Gemini.mp3
</code>```

ContentLicense: CC BY-SA 4.0


问:
Accessing an app by another app
For example: There is a lot of apps about of theme switch in Play Store. If switch dark or light(any theme switcher app), the related app(whatsapp, instagram, etc.) theme switches dark or light. Actually, what i want ask is how another apps access to related apps. How is possible? I hope I had explain, sorry for bad english.</p>

Title: Accessing an app by another app


问:
Samsung Galaxy A20, tried root. No OS installed. Sideload doesn't work
I was attempting to root and flash Havoc OS on my phone. I am in TWRP and I don't have the havoc OS image on my device's storage. All of my device has been wiped and there is no OS there anymore (rebooting gives me that warning that I shouldn't reboot cause I don't have an OS). Sideload keeps failing to start when I go to Advanced -> Sideload (in TWRP) and I do have the phone connected to the PC with a USB cable but it doesn't show anything in the File Explorer. adb devices doesn't list anything in list of connected devices and adb push shows the "no device/emulator found" error. Is my phone bricked? Please help me.


问:
How can I stop a Galaxy S7 from connecting to multiple Bluetooth sources?
In my front room I've got a Bluetooth sound bar under the TV. I also have a portable Bluetooth speaker that I use around the house a lot, mostly in the kitchen.

However the reception from my sound bar weakly reached the kitchen. So when I'm listening to music while moving round preparing food, my phone regularly picks up the sound bar and connects to that too. When that happens the music stops and neither device plays. I have to turn Bluetooth off and on again and reconnect to the portable speaker.

This is super annoying and I find it hard to believe there's no setting to turn off multiple connections or auto connect to stop it happening. Is there anything I can change so that my phone will stick to one Bluetooth device at a time?


问:
Restoring notes from .bak file
I had LG G4 which i've backed-up and kept the .bak file on my computer . I sold the phone but I want to restore the notes from the QuickMemo+ app. Tried to find applications for my mac that would help with this but all of them require connecting a phone to restore the data. Any ideas how can I achieve this without using actual phone? (that is, using computer only).

Thanks

Title: Restoring notes from .bak file


问:
Video files mysteriously deleted
I get some files deleted when doing this, it happened twice and it doesn't happen anywhere else:

I download some mp4 files with Chrome or Brave, both in incognito mode, and directly to the microSD card, as the internal storage is almost full

for some reason, when choosing microSD as download folder, apps don't let you choose the folder, so they get downloaded to /Android/data/com.android.chrome/files/Download

media players don't seem to find that folder, so I use File Manager move them to /DownloadsSD also on microSD storage

I play them with MX Player, but at some random point they disappear (but other files that were in that folder before stay there, the only ones deleted are the newly downloaded ones)

The card is formatted as internal storage.
Do browsers delete files downloaded in incognito mode? Or maybe it has something to do with using the microSD card as internal storage?

Title: Video files mysteriously deleted


问:
How to download synced application data from Samsung Cloud?
My Android Samsung S7 smartphone is broken, so I wanted to access my memo which I have backed up at Samsung Cloud. I don't have another smartphone. I just need to download the data to the PC and dig the data out of the files. But I don't know how to download those data. THere doesn't seem to be a link for download:

I went to Samsung Cloud, but here also is no link to download:

How do I download this as a file to PC?


问:
How can I copy specific wifi networks from one Android device to another?
I have a rooted Android 7.1.1 phone with a large number of wireless networks configured; some of these are relatively complicated (EAP-TTLS, custom CA certificate, whatnot; the point is it's more involved than just a shared secret).

I would like to copy some of these networks to another phone, also rooted (running reasonably recent LineageOS, likely Android 9 or 10), without overwriting other wifi configuration that exists on the destination phone.

I know I could use something like Titanium Backup (which I bought) to do a full backup of all wifi networks from the source phone and restore it on the destination phone, but that doesn't meet the following two needs:

don't transfer all, just some saved wifi networks;

don't overwrite existing networks on target device (just add new networks).

I'm also not certain it would correctly transfer the certificate along with the network it pertains to.

I looked at How to copy wireless networks list from one android device to another?, but that also only addresses copying all networks, not cherry-picking.

I suppose I could merge the new networks into wpa_supplicant.conf, but is that safe to edit while Android is running? Won't changes be overwritten? (Update: it would, unless editing while in recovery mode; see How to modify wpa_supplicant.conf) (Also, I'd still need to find a way to transfer the CA certificates.)


问:
Hard reset for Samsung T550
When I tried to hard restart my Galaxy tablet this is the message I got on the screen

OOIN MODE
PRODUCT NAME: SM-T550
CURRENT BINARY: Samsung Official
SYSTEM STATUS: Official
WARRANTY VOID: 0X0
QUALCOMM SECUREBOOT: ENABLE (CSB)
AP SWREV: S1, T1, H1, R1, A1, P1
SECURE DOWNLOAD: ENABLE

There is an arrow pointing down that says
Downloading
Do Not turn off target

Title: Hard reset for Samsung T550


问:
Restore Images from TWRP nandroid backup
My (rooted) HTC U Ultra died, not repairable - motherboard issue. I have a Galaxy S20, but want to get photos etc that were in internal storage. I have a nandroid backup taken with TWRP a few months ago a well as Titanium Backup taken on the same day. From what I understand Titanium backup does not backup data (images etc) from internal storage, so I have been looking at how I can use the nandroid backup which is a backup the entire system at a partition level.

I consider myself a novice, but I tried to restore the Ultra backup to my old HTC One M9+ (it was worth a try), this did not work because internal storage is too small, got a Error 255 and it went to a boot loop. I read in another question the nandroid backup can be opened up using 7zip.

I searched the backup file but could not find anything that resembled the images or my data, most of the files are human unreadable. Do these files need to be compiled to make them readable? Or once opened in 7zip is there a viewer app/program to read them?

Is it possible to restore the nandroid backup into a virtual space which is not device specific, like virtual box?

Any suggestions or advise would be greatly appreciated. Thanks.


问:
Why Lenovo smartphone fails to support USB OTG?
alike questions:

OTG support in Android Smartphones

Connecting Android smartphone/tablet to PC and another device through USB hub

How Does Android Detect USB Connectivity and More About USB

"Most tablets seem to supply power over USB, but many phones do NOT.

Exactly.
I tried to connect my smartphone to tablet to get ADB to work.
Unfortunately my smartphone (Lenovo) failed to recognize connected tablet as a device.

My friend adviced me basic test if OTG is supported on smartphone.

Connecting usb mouse via OTG cable to smartphone works on tablets but fails on my smartphone ( red laser led is down)

There are apps in Android store and OTG USB Driver For Android
claims after check:

This Device Supports USB On-The-Go (OTG) (my Lenovo)

and other OTG Checker app claims quite the opposite

and one another advices me to edit xml file to enable OTG

I will run another test, powering the device/s with powered USB hub as a middle-man,
since tested today USB Endoscope camera and installed a number of camera apps and none worked for me, especially AN98 advised by a manufacturer of Encoscope 1m usb camera.

At the same time I can connect my Lenovo smartphone to PC via usb cable to get connection established confirmation for files transfer.

follow-up 2

I give up usb hub connection option, as discussed already in

Connecting Android smartphone/tablet to PC and another device through USB hub

Since I have Terminal Emulator installed
I can run
adb usb
to get :
daemon not running, starting it now on port 5038
daemon started successfully
error: device not found

Not sure why port assigned is: 5038

should be : 5555 by default

nice option is
Name of adb server host (default: localhost)
-P  Port of adb server ( default: 5037)


问:
How to clear space on your internal storage, other than the trivial measures?
After 3.5 years of use, my Android  device (a Xiaomi RedMi 3S) has its internal storage full almost to capacity. I can run its cleaning routine, I can remove photos I snapped and music files I may have stored on it - but over time, more files beyond just that seem to add up. Using the system settings cleaner - same thing: It helps somewhat, but over time, stuff accumulates that it doesn't clean.

I would like, or rather, I need, to remove more data. To do so, I need to be able to differentiate between apps themselves, their reproducible data, their logs/junk leftovers, and the history of interactions, messages and other artifacts due to use. I also need to know what can be deleted and what requires some app-specific deletion facilities.

Obviously I'm not asking for a long list of all of this information for every app; but I would like your advice on how to gather such information. Alternatively - other courses of action for clearing up space which I might not have thought about (Maybe - migration of data to my SD card?)

Note: In case it matters, my Settings | Storage screen says:

Apps & app data: 13.37 GB

Pictures, Videos: 1.94 GB <- Where are those hiding? :-(

Audio: 4.72 MB

Cached data: 539.65 MB <- After running the cleaner

Other files: 2.86 GB

System Storage: 6.24 GB


问:
Unlock codes inactive
Why don't the Android secret codes work for any of my android devices, I have two s7 edge phones and two s9 phones with the straight talk wireless unlimited plan, the phones came from Verizon wireless and were transferred over, any reason why?

s9 just downloaded the latest firmware, It didn't work before or after.

```<code> Testing Menu. *#*#4636#*#*

 Factory Restore. *#*#7780#*#*

 Camera Information. *#*#34971539#*#*

 Display Info about device. *#*#4636#*#*

 Backup all media files. *#*#273283*255*663282*#*#*

 Completely Wipe device, install stock firmware. *2767*3855#

 Wireless LAN Test. ...
</code>```

Title: Unlock codes inactive


问:
App usage history
I'm trying to find out how to check my Application Usage History of this phone. 4636 Does not work, and other applications in play store only start monitoring the app history once installed. I uninstalled an application last 2018 but I want to know how many hours I used on the application, and when I last opened it. Is there an application that can see that?</p>

Title: App usage history


问:
Is there a straightforward way to lower/increase wifi transmit power on android devices?
As an example I can easily adjust wifi transmit power on Windows 10 in the wifi adapter properties.

Do you know if anything analogous could be done on Android?


问:
Cannot access network from non-root users in terminal (Permission denied)

Preamble

My problem is, to run specific commands (i.e., start specific processes, possibly at background) on boot. I've installed Termux, so I want to start some of its commands at boot time, such as sshd and crond. For some reason, I don't want to use Termux:Boot application (mainly because it do things late).

I used a script written some time ago, which ables me to call a Termux command, running as the user which Termux shell itself starts as (so not to have problems with processes being run as root, and be able to access Termux commands, at the same time). It worked, however, there is a problem: The network access is denied.

How I found it is a permission denied problem, not something else?

Initially, let's say how I logined as the non-root Termux user. whoami gave me the Termux user name, which was u0_a73. As my phone was (and is) rooted, I could use su binary. So, I ran this:

```<code>$ su - u0_a73
</code>```

Now, I should be able to run sshd command. No, it failed:

```<code>$ sshd
bad addr or host: <NULL> (No address associated with hostname)
</code>```

Why? Focusing on most important parts, I ran ltrace and strace commands. To find what was going wrong, this command helped me a lot:

```<code># # Find most syscalls exited with errors
# strace sshd 2>&1 | grep "= -1"
</code>```

And resulted in:

```<code>openat(AT_FDCWD, "/data/data/com.termux/files/usr/lib/libc.so", O_RDONLY|O_LARGEFILE|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/data/data/com.termux/files/usr/lib/libnetd_client.so", O_RDONLY|O_LARGEFILE|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/data/data/com.termux/files/usr/lib/libc++.so", O_RDONLY|O_LARGEFILE|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/data/data/com.termux/files/usr/lib/libm.so", O_RDONLY|O_LARGEFILE|O_CLOEXEC) = -1 ENOENT (No such file or directory)
getrandom(..., ..., ...)            = -1 ENOSYS (Function not implemented)
socket(PF_INET6, SOCK_DGRAM|SOCK_CLOEXEC, IPPROTO_IP) = -1 EACCES (Permission denied)
socket(PF_INET, SOCK_DGRAM|SOCK_CLOEXEC, IPPROTO_IP) = -1 EACCES (Permission denied)
</code>```

Duh! Look at the two last lines: Permission denied.

The Problem

Note: It important to note that the same problem does not exist with Termux shell itself, even with the same environment variables on both shells.

The problem is, I cannot connect to network devices, such as wlan0 (WiFi) and rmnet0 (Data). All commands that requests these accesses fails, like sshd, ifconfig, wget and ping.

So, after a lot of researching:

I've found this thread. It also provides an answer to the problem. However, there are no groupadd or usermod commands (or addgroup or moduser either) on my Android box, anywhere. See this question. It seems these commands may exist or not from device to device.

Due to the note at the beginning of the current section, after running id command on both shells, I realized that, Termux shell's user is added on extra groups than my custom su-initialized shell. The Termux shell u0_a73 user is on extra groups, including inet, everybody and all_a73.

Note: Thanks for the helps, but please avoid saying "So you should add u0_a73 in your custom shell in these groups, particularly the inet one!". Seems impossible in my environment. Read the previous item; I have no command to do this (Why? IDK).

There's another room: Changing permissions (or possibly owners) of device files (or something else). While it should be considered as a temporary fix, as it might have security flaws, but, if you know how, then I'll appreciate you by an upvote (perhaps will not be my own answer).

I don't know if it helps or not, but when I use su provided by Termux and I run ifconfig inside, a bunch of these audit messages will be produced:

```<code>09-04 20:08:04.647 24951 24951 I ifconfig: type=1400 audit(0.0:2567): avc: denied { ioctl } for path="socket:[221195]" dev="sockfs" ino=221195 ioctlcmd=8912 scontext=u:r:magisk:s0 tcontext=u:r:magisk:s0 tclass=unix_dgram_socket permissive=1
09-04 20:08:04.647 24951 24951 W ifconfig: type=1300 audit(0.0:2567): arch=40000028 syscall=54 per=800008 success=yes exit=0 a0=3 a1=8912 a2=be83a738 a3=3 items=0 ppid=24888 auid=4294967295 uid=10073 gid=10073 euid=10073 suid=10073 fsuid=10073 egid=10073 sgid=10073 fsgid=10073 ses=4294967295 tty=pts19 exe="/data/data/com.termux/files/usr/bin/ifconfig" subj=u:r:magisk:s0 key=(null)
</code>```

So, how to fix this permissions problem, that is, the system blocks a non-root user from accessing network devices?

I'm using Android (custom ROM, ViperOS) 7.1.2 (rooted), with Magisk installed, kernel 3.10.

Thanks in advance.


问:
Why does Android force close apps after update?
I have been using Linux in my PC for a long time. I had noticed that if an app is updated while it is running, the app is not forced to close or restart. But in Android, I noticed that apps are forced to close after updating.

Android being based on Linux kernel, why does it force close an app after updating that app?


问:
Camera zooming by using Bluetooth buttons that act as volume buttons
I have a Huawei P30 Pro and this Bluetooth camera shutter. The shutter had dedicated buttons for zooming.

Sadly, the volume buttons on the P30 just act as a shutter (the zooming buttons on the shutter just send the volume buttons signals too) and there is no customization option in the built-in mobile app to set them for zooming).

I found Adobe Lightroom  that lets you use the volume buttons for zooming, but it does not utilise the optical zooming of the phone and the shutter button will stop working (it will be similar to the zooming-out button)

Is there any workaround? Alternatively, any apps that can be installed to take photos instead of the factory app?


问:
Cannot restore TWRP Backup because it cannot mount internal storage after reboot
I don't set pin/password for my device.

The first time I use TWRP, it cannot mount internal storage. So I go ahead and wipe the storage. This allows internal storage to mount and I can create NAndroid backup for my phone.

Then I restart the phone and go through the setup process from beginning.

Then I restart into recovery (TWRP) again, it asks for the encryption password again. So I in effect cannot see what's on my internal storage and cannot see how can I ever restore such backup I made earlier.

What did I do wrong? How can I backup and restore using TWRP without setting pin/password for my device?

(For the record, set 0000 as lock screen PIN and use it as decryption password doesn't work for me)


问:
How to restore purchase from multiple google play store?
I have multiple account logged in my google play store and I have different app purchased from different account. My all purchase from one account got restored(the one which who logged in first in my play store) and unable to restore the other app purchase . When I try to restore the purchase of app I get purchasing option from another account other than from the account purchased earlier.</p>


问:
True full backup of android including profiles
Referring to this tread as an example:How to make a full backup and restore (including ROM) using Windows PC via USB?

I would like to make a full backup, This means everything. Apps files profiles settings literally everything.

there are countless "backup options" some will recover partially some come quite close. (Samsung Smart Switch) But always small issues are missing en old skin and app i use uccw. Settings UI layout etc.
countless small irritating things. The bank app is one of them. While i disagree with the policy of reset when downloading it from the store again, I can see why it is done. Things should be different when i make my own backup.

Summarize is there a way to make a "true backup" from a android phone I have root if that helps.

PS. I can absolutely do without the lecture. My Phone/My Money/My Risk. Just like to know what is possible


问:
How can you connect to Yahoo! imap in native android email client?
I'm running Android 8.0 on an LG V20

When I attempt to connect my Yahoo! mail to the stock android email app I'm unable to enter my application password for Yahoo! Instead the native android email app decides that if "yahoo.com" is in the email address then they would connect me to an OAuth type 2FFA (2 factor authentication) regardless of the fact I chose MANUAL SETUP. When I attempt to connect using the Oath I get a text message from Yahoo! with my 6 digit pin. After entering it there's a small popup at the bottom of the screen that only says 'Not Authenticated' with no indication of why. I've already tried 6 times both using the Yahoo! option and the manual setup option.

POP3 works allows me to connect using my application password that I made in Yahoo!, but it sucks because if I read the email elsewhere, it still appears as unread on my phone.

How can I access my yahoo email with the native android client using IMAP when OAuth isn't working?

EDIT 9-11-2020:
I have the email app source pulled up, and there's an XML that defines providers. Since it's an XML I figured it's probably read at run time and if I could find it and remove the entries for Yahoo then the OAuth plugin shouldn't get triggered.

Here's a link to the email AOSP repository. https://android.googlesource.com/platform/packages/apps/Email/+/refs/tags/android-8.0.0_r50

This is the app that is getting called. I have android studio and I'd be glad to recompile it if someone has a link to instructions for that.


问:
Wireless display via Miracast without redirecting audio
I have an AnyCast device attached to my HDMI monitor (which has no audio capability).
This is working fine with Miracast from my Samsung A71, using 'Separate App Sounds' to push the audio out through the 'phone speaker.

I also have a cheap tablet (DragonTouch K10, Android 8.1.0).

If I cast to the AnyCast via the DragonTouch's wireless display support, the display works a treat but the audio disappears (presumably it is being routed to non-existent HDMI audio support).

Is there a generic Android equivalent to the Samsung 'Separate App Sounds', or any other suitable 'audio switch' capability, and, if so, where can I find this? I have tried a few apparently relevant Google Play apps but they just tinker with the volume and/or swap between speaker and headphones.


问:
What is this device administrator called screen lock service?
I was looking at the device administrators of my phone in the settings and saw a device administrator called "screen lock service". It's description is "Activating this administrator will allow the app Google play services to perform the following operations: set password rules". I have looked at my device administrators before and this particular one was never there before. It just appeared out of nowhere. Can anyone tell me what this is and if I should be doing something about it?</p>


问:
Bind command on ADB to Android Emulator problem
im sorry.. im new here.. i don't know where to start. i want to run some command in emulator (android). im running certain apps, and i need it to run and not to be detectable in emulator instead as android mobile. The problem is, this command suppose to bind certain file, but its not bind.. maybe the bind command is wrong. see below script/command

```<code>@echo off

adb.exe kill-server
adb.exe start-server
adb.exe devices
adb root
adb remount

adb shell sleep 2

adb shell am start com.abc.im /com.abcgames.ab1.SplashActivity filter

adb shell sleep 3
adb shell pidof com.abc.im

adb shell sleep 6
adb shell for i in $(pidof com.abc.im | awk '{print $1}'); do mount --bind /proc/2/maps /proc/$i/maps; done
</code>```

above if full command that i write on batch file (*.bat)

my question is in this particular command below

```<code>for i in $(pidof com.abc.im | awk '{print $1}'); do mount --bind /proc/2/maps /proc/$i/maps; done
</code>```

its not working. can anybody help me correct it?

p.s - sory for my poor english...  TQ


问:
Is this "app" malicious or is it a bug?
I was examining my battery usage and noticed this:

I don't know what this "-5" app is supposed to be. Could it be malicious or is it just a bug?

I own an OnePlus 6 with Android 10 (OxygenOS 10.3.5).

Title: Is this "app" malicious or is it a bug?


问:
Is mtk-su safe? Is it actually temporary?
mtk-su which helps mediatek mtk-65** based phone owners to basically gain a "temporary" root. My question is, if it was actually temporary as it claims, and if it actually doesn't persist after each system reset or reboot. The other day I scanned the file on virustotal, and the engines detected it as a malware.

mtksu xda forum https://forum.xda-developers.com/android/development/amazing-temp-root-mediatek-armv8-t3922213/amp/


问:
Is it possible to have a custom ROM with a locked bootloader?
I just mention in-advance to please correct me if I'm mistaken on anything, I've a limited tech proficiency.

I've a Samsung S9 (Android 10) and I wish to install an AOSP ROM (also on Android 10), but I researched and found my phone still uses "Full Disk Encryption" instead of "File Based Encryption" (which is a requirement by Google as of Android 10).

I think one must unlock the bootloader in order to install any custom ROM, right?

If yes, then I'm left with FDE encryption and unlocked bootloader.

FDE means if my phone is stolen (or taken by force) while turned ON (i.e., always in my case) my data is at risk, right?

Unlocked bootloader means someone tech savvy can have (some kind of a) backdoor access to my phone's data even if my phone is turned OFF, right?

So, logically, in order to be secure, one must either have a newer device that supports FBE, or an FDE one with locked bootloader (and also not have it taken while turned ON)

Thus, I thought maybe I can have a custom ROM installed but still have the bootloader locked after I install it?

Again, I apologize if I'm mistaken on anything, please do correct me. Thanks


问:
Where are notification preferences stored? How can I save/restore them?
Where are per-app per-notification preferences (the kind, sound, vibration, etc. settings for each type of notification for each app) stored on Android?

I'd like to back them up to be able to restore them later. (I have root permissions.)

If there's already an app for doing this, I'd appreciate knowing about that as well.


问:
Speed from mobile hotspot is not consistence and poor speed
I am WFH and using Xiaomi note 8 pro for hotspot to my work computer and I have D-Link dongle which catch the hotspot signal. I am using Airtel sim card for that.

When I start working to my system at 10:30 IST in the morning, sometimes I do get speed about 15-20Mbps but while loading the page it doesn't seems to be that much speed. After 2-5 minutes of this "Rocking" speed, it came down to below 100Kbps and sometimes below 10Kbps as well.

If I am opening Youtube.com, I can watch the videos in full HD without buffer but at the same time i won't be able to remote connect to my PC.

Same when i open youtube, facebook, instagram like app on my mobile, it works good and speed is also good as i can see the speed at the top of my screen. Youtube is giving me speed like 600Kbps-1Mbps and other app too gave me speed of  upto 500Kbps. But as soon as i opened some other app, speed bites the dust.

Suppose I opened 2 apps in the background. One is Youtube and other one is cricbuzz. I maximize youtube and browse some videos and i can see speed upto 600-800 Kbps and suddenly i minimize the youtube and maximize cricbuzz. All of sudden the speed from 600Kbps goes down to 6Kbps.

I am unable to work properly and neither i am getting any support from Sim Company. I am asking this question over here so that if i could get some help in terms of if this is the issue of network company or mobile company or my device is not upto the capacity.

If there would be any work around or hacks. Any kind of solution would be a great help.


问:
How to know that a installed app is 32bit or 64bit?
How to know that a installed application on my android is 32bit or 64bit version.</p>


问:
Get Notifications from Google chat web to android
I use a work account on google chat on web. But Google suite of that account dosnt have Google Chat/Hangout app for android. And as far as I know, Google chat only gives me push notification on web.
Is there any way I can directly recieive Gchat notifications from my work account to my android device Directly ?</p>


问:
Is there a symbol to differentiate between dropped call and hanging up normally?
I have a galaxy s10, long story short I've been dealing with a department that messed up my billing and I'm contesting it, they hung up like 4/5 times and also sent me to voicemail a few times. They're claiming that their system is having issues and that it's dropping calls. I'm wondering if a dropped called has a symbol to identify it? For example this picture here has a bunch of orange arrow going out that says that I called this number, if it was rejected, it would be a blue circle crossed through, if they called me the arrow would be going inwards etc. Does a symbol exists for when a call was dropped on either end? I tried looking this up but I couldn't find an answer about whether this symbol existed or not, just a lot of articles about how to fix dropped calls which isn't an issue I'm having since I can call anybody else just fine


问:
Realme 5 (android 10) trying to boot into fastboot mode
I can't boot into fastboot mode, no key combination works, I also tried with adb command 'adb reboot bootloader' then fastboot logo flashes for a second and it boots into system!
I contacted Realme customer executive and they said there is no fastboot on this device!!!
What does that mean?
Is there any work around?</p>


问:
A cheap android phone killed my sd cards when I formatted them to internal, any way to get them back?
I bought an Ulefone Paris 2015 Chinese phone, a few years ago, it came with a bloated/malware OS, I put in a Lexar SD card, formatted as internal, something didn't work right (I don't remember), I tried again with another Lexar but same card, also the same, I stopped doing that.

Since then the cards have been read only and I have thrown everything I can at them to format, except Linux command line, because I'm on Windows and Mac, but always gives errors and that it's read only (it's not plugged on my mac from a SD adapter so there is no lock switch, it's coming from a USB adapter that came with the card).

I rooted the phone and put on a normal android 6.0 and it doesn't format the phone anymore either, they were brand-new cards, but something messed them up from that phone in its original state.

Is there anything I can try before I throw them out? They mount fine and show android files, which pop back up when I delete, because read only, but that original garbage android formatted them in a messed up way, so that's the key, something with Android.


问:
Stuck in system boot loop after TWRP installation
I have a Samsung Galaxy S7 and tried installing the custom ROM LineageOS because what could go wrong?

Anyways I followed this guide which makes you install TWRP 3.4.0-0 under the Installing a custom recovery using heimdall section.

I did that and I can (successfully?) boot into TWRP. However when tapping Reboot -> System or trying to boot into my standard android system I am stuck in a boot loop where The Samsung logo reappears every 5 seconds or so.

Here is what I've tried:

The command  dd if=/dev/zero of=/dev/block/platform/msm_sdcc.1/by-name/fota from here

The command dd if=/dev/zero of=/dev/block/bootdevice/by-name/misc bs=256 count=1 conv=notrunc from here

Wiping my entire phone from TWRP

None of those things made any difference.

I really just hope that I didn't brick my phone.


问:
Which files do I need to flash with fastboot to get a stock device state?
I have downloaded the stock ROM for my Mediatek (MT6580) device. Extracting the files leads me to a couple of *.img files and SP Flash Tool. I am currently on a Linux distro and have adb and fastboot packages installed, and am not able to use the SP Flash Tool. I was wondering which files do I need to flash to get a factory version of the phone.

fastboot getvar all shows these outputs

```<code>(bootloader)    max-download-size: 0x8000000
(bootloader)    partition-size:userdata: 32000000
(bootloader)    partition-type:userdata: ext4
(bootloader)    partition-size:cache: 10000000
(bootloader)    partition-type:cache: ext4
(bootloader)    partition-size:system: 5d000000
(bootloader)    partition-type:system: ext4
(bootloader)    partition-size:metadata: 2560000
(bootloader)    partition-type:metadata: raw data
(bootloader)    partition-size:nvdata: 2000000
(bootloader)    partition-type:nvdata: ext4
(bootloader)    partition-size:tee2: 500000
(bootloader)    partition-type:tee2: raw data
(bootloader)    partition-size:tee1: 500000
(bootloader)    partition-type:tee1: raw data
(bootloader)    partition-size:frp: 100000
(bootloader)    partition-type:frp: raw data
(bootloader)    partition-size:expdb: a00000
(bootloader)    partition-type:expdb: raw data
(bootloader)    partition-size:logo: 800000
(bootloader)    partition-type:logo: raw data
(bootloader)    partition-size:para: 80000
(bootloader)    partition-type:para: raw data
(bootloader)    partition-size:keystore: 800000
(bootloader)    partition-type:keystore: raw data
(bootloader)    partition-size:secro: 600000
(bootloader)    partition-type:secro: raw data
(bootloader)    partition-size:oemkeystore: 200000
(bootloader)    partition-type:oemkeystore: raw data
(bootloader)    partition-size:recovery: 1000000
(bootloader)    partition-type:recovery: raw data
(bootloader)    partition-size:boot: 1000000
(bootloader)    partition-type:boot: raw data
(bootloader)    partition-size:lk: 60000
(bootloader)    partition-type:lk: raw data
(bootloader)    partition-size:seccfg: 40000
(bootloader)    partition-type:seccfg: raw data
(bootloader)    partition-size:protect2: a00000
(bootloader)    partition-type:protect2: ext4
(bootloader)    partition-size:protect1: a00000
(bootloader)    partition-type:protect1: ext4
(bootloader)    partition-size:nvram: 500000
(bootloader)    partition-type:nvram: raw data
(bootloader)    partition-size:proinfo: 300000
(bootloader)    partition-type:proinfo: raw data
(bootloader)    partition-size:preloader: 40000
(bootloader)    partition-type:preloader: raw data
(bootloader)    off-mode-charge: 1
(bootloader)    warranty: no
(bootloader)    unlocked: yes
(bootloader)    secure: no
(bootloader)    kernel: lk
(bootloader)    product: RS615
(bootloader)    version: 0.5
all: Done!!
finished. total time: 0.012s
</code>```


问:
Samsung Galaxy A11. Turn on 64 bit node?
I wanted to purchase a 64-bit android smartphone. I looked at the processor used on the Galaxy A11. It is a 64-bit ARM Cortex-A53. And I bought this phone.
Looks like I made a mistake. Android on the Galaxy A11 runs in 32-bit mode.
Is it possible to switch the phone to 64-bit mode?</p>


问:
Can WhatsApp be used without granting contacts permission?
I'm trying to install WhatsApp, but I'm obviously uncomfortable about serving up my entire address book for Facebook to trawl through.

I've found plenty of posts from a few years back saying it is possible, but I'm wondering if something has changed.

On opening the app and going to the 'chats' screen, I'm greeted with a screen saying "To help you message friends and family on WhatsApp, allow WhatsApp access to your contacts" along with a link to open my settings.

If I push the green 'chat' button in the bottom right, I get a popup with the same message. If I hit the 'not now' option, it closes the popup and puts me back on the original screen.

There doesn't seem to be a way forward here. Does this app just strong-arm you into uploading your contacts list in order to use it? Or is it potentially a more phone-specific issue?


问:
Is there a way to receive security updates after vendor stops them, without compromising SafetyNet attestation?
Imagine the following situation:

The vendor of my phone has stopped providing security patches for the stock OS.

The HW is perfectly fine and powerful enough for years to come, so I'm definitely not willing to replace it just to get access to security patches.

Running a phone OS with unfixed security vulnerabilities makes me uneasy. (It feels insane enough to run a computer at home with an OS that's a year behind on security patches. It's twice as insane to do the same with a device that I routinely take to all kinds of hostile environments and untrusted networks.)

Authors of all kinds of random apps have grown a habit of requiring SafetyNet attestation.

I don't need root access to my phone, and I can live with losing some of the proprietary vendor-provided features. I also don't care too much about running the latest Android version, as long as it's receiving security fixes and is compatible with most apps.

I know I have the following two options:

Stick to the stock vendor OS, which is gradually going to become full of security holes. However, SafetyNet passes and I can run all kinds of apps because they feel safe on my device.

Install a custom OS. This will fail SafetyNet, unless I use a tool to hack around it and try to pretend the phone is not rooted. This approach is likely to stop working at some point, leaving me with a device that fails SafetyNet. Thus although my device may have up-to-date security patches, apps will refuse to run because they deem the device insecure.

Is there a third way, which would let me stay up-to-date on security patches while not breaking SafetyNet? I can imagine something like a pure AOSP system, perhaps built and signed by Google or another vendor, that I could run unrooted and unmodified (relying on vendor drivers through the Treble thing).


问:
Kinzie - Modify custom rom to enable VOLTE support
I'm a newbie to Android and Custom ROM in general. I was able to flash a workable custom rom (Android 7.0) on my Moto X Force by following steps from xda-developer.

So basically the device Moto X Force (release under the codename Kinzie, XT1580) in India does not support VOLTE. The same phone released in US (droid turbo 2, XT1585) supports VOLTE in contract with Verizon. I performed lot of search on google if there is a custom ROM which can enable the VOLTE support on this phone but couldn't find any.

What I have tried so far:

I managed to install various custom and stock ROMs on my phone.

Flashed Verizon stock ROM on my device but it did not detect the SIM card at all. I tried updating the radio from other custom ROMs but no luck.

Can someone please confirm if enablement of VOLTE is possible by software ? Looks like the phone has the required hardware to support VOLTE. If yes, then please point me in the right direction of achieving it.


问:
Generate whatsapp stickers from PC without any app
I am newbie when it comes to whatsapp stickers, and I don't know about how stickers work.

But I am using a linux desktop where I have written a basic ruby script that could convert svg to webp, multithreaded. In a loop, it reads certain folders with svgs.

I have have 30 svgs in 4 folders, total 120 stickers. I want myself and people to add possibly a thousand more over time.

Currently I am used to copy the directory containing webp files to my android phone, use sticker.ly to manually select and generate stickers. That's too much work.

I want my script to have the sticker generator code in the loop, where it will generate stickers from svgs, I can take the packs to my phone and add them to whatsapp. That way I will be saving a lot of time.
Is it possible?


问:
How do I block "you missed a call from..." messages for blocked spam calls?
Android does a great job of blocking spam callers. However, my phone provider sends me messages when I miss calls, so while I don't receive the spam calls themselves I always receive these follow-up sms in my inbox;

Note that while this SMS is sent by my phone provider (Telstra) the number appears as the number of the caller (in this case 02 9133 5694), not the number of my phone provider.

I don't want to disable these SMS as they're genuinely useful to receive when I miss calls from people I actually know. Also, clearly Android knows that this message is related to a spam caller, since it has flagged the message, so how can I get Android to just block these messages?


问:
Searching Call Logs in Android 10 Dialer app
Had a query-
I've been trying to find out how to search for numbers in the Dialer app (Android 10/Nokia 6.1). It searches only contacts & places.

Eg- Let's say I received a call today from a number say 535-555-5555.

Since the number isn't saved as a contact, if I try to dial the number, the number does not show up at all (barring similar numbers from my contacts).

As you start entering the digits, it would narrow down the choices and show you the correct number, when you dialed it (or received a call from). In my previous phone (Vivo /Funtouch OS), this was a very well organized function.

I've tried a few dialer apps but all look only through contacts.

Is there a setting in the native Android 10 dialer app that I can change to allow it to search through call logs? OR Is there a Dialer app in the Play store that can do this?

Sharing links of those who have had similar issues.

https://support.google.com/pixelphone/thread/7169712?hl=en

https://stackoverflow.com/questions/53268297/android-how-to-search-through-call-logs-for-a-specific-number

https://forums.androidcentral.com/samsung-galaxy-s7-edge/698950-how-can-i-search-my-calls-log.html

https://stackoverflow.com/questions/53268297/android-how-to-search-through-call-logs-for-a-specific-number


问:
How to reduce screen saturation on android 6 without root?
I have a galaxy j7.
Have any way to reduce screen saturation of this phone?

I saw in google some clues about a Screen Adjuster... but i didnt found it in Google Play.
So i tried a bunch of apps, but none of these have the option to reduce satiration. Only increase of brightness and color.

I have found the monocromacy mode. But i would like a little of saturation, not much, but a little.


问:
RQT_CLOSE when flashing TWRP into Samsung Galaxy A8 (2018) with Odin
I am trying to flash TWRP into my Samsung Galaxy A8 (2018) based on official instructions from:
https://forum.xda-developers.com/galaxy-a8-2018/samsung-galaxy-a8-2018-roms-kernels-recoveries--other-development/recovery-twrp-3-2-2-0-galaxy-a8-2018-t3818201

I have followed the instructions carefully and repeated several times. I initially tried things on linux with adb and heimdall, however heimdall was failing to flash, so I returned back to the exact Windows instructions using Odin3 v3.13.1. When I try to flash twrp-3.4.0-0-jackpotlte.img.tar into my Samsung Galaxy A8 (2018) aka SM-A530F, Odin fails consistently with this log:

```<code><ID:0/006> Added!!
<ID:0/006> Odin engine v(ID:3.1301)..
<ID:0/006> File analysis..
<ID:0/006> Total Binary size: 35 M
<ID:0/006> SetupConnection..
<ID:0/006> Initialzation..
<ID:0/006> Get PIT for mapping..
<ID:0/006> Firmware update start..
<ID:0/006> NAND Write Start!!
<ID:0/006> SingleDownload.
<ID:0/006> recovery.img
<ID:0/006> RQT_CLOSE !!
<ID:0/006>
<ID:0/006> Complete(Write) operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)
<ID:0/006> Removed!!
</code>```

I believe my phone is not RMM locked because I see Developer Options in my settings. I tried the process with OEM unlocking enabled and disabled in my phone Dev Options. No success yet.
I googled the issue for a few hours, however people mostly report seeing RQT_CLOSE when phone is RMM locked, which I believe is not my case. Maybe this is related to the recent Android update I installed yesterday.

Phone software:

```<code>Android 9
Baseband version: A530FXXUECTH1
Kernel version:
 - 4.4.111-19323942
 - #1 Mon Aug 3 15:36:52 KST 2020
Build number: PPR1.180610.011.A530FXXUECTH2
Security patch level: August 1,2020
Security software verion:
 - ASKS v3.1.1 Rlease 20200120
 - ADP v3.0 Releasae 20191001
 - SMR Aug-2020 Release 1
</code>```

What does RQT_CLOSE actually mean? Could you please help investigate?


问:
How do I force a hard shutdown of a phone with non removable battery?
My phone is Samsung Galaxy S7 with Android 8, and any phone specific answers are welcome but I am looking for a general solution

A few days ago  my phone screen went crazy and started detecting touch events all over the place when it was just left alone on a table. The home button seemed to be unaffected and brought the phone to the home screen, but it didn't stay there long enough for me to be able to do anything. Long pressing the power button brought up the (power off, restart, emergency mode) interface, but it turns out touching anywhere on the screen other than the three specific buttons causes the buttons to disappear, and since touch events were getting auto generated, the shutdown option kept disappearing. Eventually I managed to stay on the shutdown interface long enough to press the shutdown button.

Is there any way to forcefully cause a hard shutdown on a phone that does not have a removable battery? I am looking for a general solution that works on all phones, if such a thing is possible. I would also like to know if this is possible from adb on an unrooted phone.


问:
How do I turn off location permanently on Android
My Samsung note 8 is running Android 9.

GPS location is frequently turned on without my knowledge or permission. There appear to be multiple triggers for this including a change in Wifi network e.g. leaving the house using cellular data and coming back.

This is a nuisance and unwarranted location tracking of the phone. I want to be in control of when I decide to use location based services.

Is there a way of switching off location globally in the settings so I can control this behaviour?


问:
Can we hear media and make call simultaneously using two bluetooth devices?
The picture says both are active.

Device : redmi note 7 pro


问:
why DAC isn't sufficient for Android that it needs MAC(selinux)
I learned that each app is assigned a separate UID so that a rogue app cannot access other apps data and system sensetive data and files.

What's problem with this that they have to use MAC(selinux)


问:
How to flash /system using twrp when system.img is 1.7GB and internal storage has 1.5GB max limit
I happen to have an old phone laying around with messed up system partition(a couple of files accidentally deleted). This phone has an internal storage of max 1.5 GB(total 4gb, after setting everything up leaves me with 1.5 GB). I downloaded the stock firmware for the phone and the system.img size is almost 1.7GB I have twrp recovery. Is it possible to flash with an external sdcard.
N.B: I unfortunately don't have my pc with me atm.</p>


问:
What is directory under selected numbers in redmi call recording settings?
What is directory button under selected numbers in redmi call recording settings?
Does it mean contacts?

Device : redmi note 7 pro


问:
Android 10 user CA file not being used in apps
I'm using an ISP that does internet filtering for me, I have install their CA file, and it works in the browser, and used to work in all apps.
After the latest update for Xiaomi Redmi Pro 9, Youtube, Spotify, etc. seem to be unable to load network resources.

I get this error on logcat

```<code>09-16 13:17:40.116 29069 29229 E GoogleConversionReporter: bffy: Exception in CronetUrlRequest: net::ERR_CERT_AUTHORITY_INVALID, ErrorCode=11, InternalErrorCode=-202, Retryable=false
09-16 13:17:40.116 29069 29229 E GoogleConversionReporter:      at org.chromium.net.impl.CronetUrlRequest.onError(PG:59)
</code>```

Meaning the chromium component fails, or refuses, to use my user specified CA.
Is this on purpose? Is this a bug? I really don't want a VPN installed on my device to be able to use my own ISP.


问:
Sending SMS via adb
I have used keyevent 66 to click on send, i can see that keyevent is working right its clicking on the desired button but still SMS not sent

I am using following code still my message is not sent on desired number.

```<code>adb shell am start -a android.intent.action.SENDTO -d sms:$no --es sms_body SMS_BODY_GOES_HERE --ez exit_on_sent true

adb shell input keyevent 22

adb shell input keyevent 66
</code>```

I can see enter has been pressed but don't know why sms is not sent.

Title: Sending SMS via adb


问:
How can I backup apps while in Safe Mode?
My phone is stuck on boot problem and I was recommended to wipe it all. However I still manage to get into Safe Mode.

My question: how can I backup my apps while in safe mode? No need to backup all apps, just a few important ones (among others: Kiwi Browser, Daylio [Journaling app], Swipetimes [time tracker], Sleep for Android, Expense Manager).

I already use the Android default backup but it seems like it only backup Google apps. I unfortunately do not use Helium or Titanium Backup.

My phone is not rooted. Any help?


问:
Formatted bootloader by mistake and phone won't turn on (device: MT6570)
I have a Techno Spark 3 with a MT6570 chip and i used the SP Flash Tool to flash the ROM but i kept getting the error STATUS_PARTITION_NOT_FOUND, so i thought that if i format the bootloader it would help but instead i have a dead phone which cannot even come on when you press the power button.

I also wish to know if i am using the correct ROM because my phone seems to be a clone and it cannot accept any of the newer chips MT6971 0r MT6580 i have attached the phone's about section so that you could tell me which exact model it is.


问:
Accessing vdc from shell
I am trying to change my device encryption password by opening a terminal in TWRP and typing vdc changepw default_password 1234 and it's giving me vdc: inaccessible or not found.

Is there something wrong with my approach or is the issue with the phone?

Title: Accessing vdc from shell


问:
What android apps are these?
I currently use a TCL A1 (A501DL) running Android Version 8.1.0.

I went to check my Wi-Fi data usage. I scrolled down and seen all these apps! There are 9 of them. I've never seen them before and when I click them there is no app information.

I checked all 44 apps I have, and it doesn't show any of these and it doesn't appear to be feeding off my battery data I already checked that. What's going on? Am I being hacked?? I don't use the cell data on this phone. I just use it for Wi-Fi. Somebody please help me! I'm kind of worried about my privacy now.

Title: What android apps are these?


问:
Install Android 4.1 on unknown custom Chinese tablet with X210 processor
I want to install Android 4.1 on a custom tablet running custom hardware and a custom Android 4.0.4 because I need TLS 1.2 to work on it.

I understand there is quite a big chance of bricking the tablet but I'm willing to risk it.

Here is some info for the device

Device Model: Unknown

Android: 4.0.4

Processor: X210 (armeabi-v7a)

Processor frequency: Unknown

Cores: 1

Audio chipset: X210

GPU: Imagination Technologies Power VR SGX 540

Display resolution: 753x480 @68 Hz (6.2")

RAM: 381 MB

Internal Storage: 540 MB

I'm just not sure how to go about it or what ROM should I use.

Do I try to find an original Google ROM or one of those custom CyanogenMod ones? I want to try something with the maximum chance of success, so any tips and guides are highly appreciated.


问:
UCCW/Tasker: Display system timer
I have an Samsung Galaxy S9 plus Default ROM but rooted.

I use my timer a lot with a default of 2.5 hours (medice req).
I have a nice UCCW theme customized to my specs.
I would love to have my timer displayed in there just like the clock. Is this possible in any form of way so I can display this with my UCCW skin ? (rebuilding the skin in KWGT is a option but not preferred.)

Title: UCCW/Tasker: Display system timer


问:
Weird problem with YouTube app on MIUI 10.2
There is this problem with the YouTube app on MIUI 10.2. When I open the app, the 'YouTube' logo part at the top has completely disappeared and it just shows the search box, the notification bell, and the account picture.

Tried the usual things like rebooting the phone. No use. When I clear the app data or uninstall YouTube app updates and re-install them, it goes back to normal showing the logo, when, after that, I open the app for the first time. But when I close the app and open it later it goes back to no logo again. Tried everything except factory reset.

Any idea why this is happening? Some kind of weird virus thing or so? Not that I miss the YouTube logo terribly :-), but this glitch seems annoying and doesn't seem to go away despite my best efforts!


问:
Turn Android device into a wireless or USB webcam with background removal
There exist several applications such as DroidCam that  can turn one's Android device into a wireless or USB webcam.

Do any of these applications have a background removal feature (= only shows the human face/upper body that appears on the video)? I tried DroidCam but it doesn't seem to have this feature.


问:
Used dd to write userdata.img into phone, now asking me for password
I used dd from twrp terminal to write to userdata on my phone using dd if=userdata.img of=/dev/block/platform/mtk-msdc.0/by-name/userdata when I did reboot, it asks for my password. I tried all the previous passwords I used before, but to no veil. Why is it asking for my password? How to overcome this situtation? Reseting does not seem to be working.


问:
Background process limit in developer options doesn't work on Samsung Galaxy S10
I'm using debloated Samsung Galaxy S10. When I set the background limit to any number or none, it doesnt work. I checked the cached process in running services, there are more than 5 apps.

Oh these are 3rd party apps. Im wondering if my phone is messed up since the settings I set it to isnt functioning.

Any solution?


问:
Why can't I turn the volume all the way down during calls?
I asked this because I have searched way too long and all the results I'm getting is why is your phone silent during calls. I can't turn the volume silent during calls, like my zoom meeting. Why?</p>


问:
Why does the Android SDK show Android 10.0+ (R) instead of 11.0?
If I open Android Studio and then open the SDK manager, I see 10.0+ (R). I checked for updates, but no other updates. Why is it 10.0+, instead of 11.0?


问:
Unable to share photos
I just "upgraded" my Pixel3a to 11. Now I can't share photos from my piktures (yes, that is how it's spelled) photo management app via Messages or Gmail. Tapping the share button presents only two options: 'Nearby share' and 'bluetooth'. In Android 10, I was greeted with many apps.

I was able to briefly get Messages and Gmail to show up in the list by going to those apps and attaching photos from there. Alas, those apps are no longer visible from piktures. The problem with attaching photos from those apps is that they show the newest photos first. While that is often the right answer, sometimes I want to share an older photo and it is very tedious to scroll and scroll in the hopes of finding it.

As a side note, I can no longer delete photos from piktures either.

Is there a setting somewhere that allows me to share from piktures?

Title: Unable to share photos


问:
ADB manual restore?
I've tried to do a full restore for a while now but i keep getting stuck on a specific app and when unpacking the backup and removing it a new problem occurs which is my phone being restarting when using the adb restore command.

is it possible to restore apps and files manually with ADB from an unpacked .AB file?

logcat

Title: ADB manual restore?


问:
What are the chances of a malware being persistent if I dd to write system.img and userdata.img from twrp
If I had a malware on my phone, say malware like xhelper, or strandhogg or something even critical than that, what are the chances of it being persistent even after using dd to write the system.img and userdata.img to the phone for eg dd if=system.img of=/dev/block/platform/mtk-msdc.0/by-name/system to write system as brand new. Is it possible that the malware could snoop into /cache or /nvdata to attain persistence. Is it feasible to use dd to flash those partitions as well? Which places would a malware use to hide itself to maintain persistence even after stock image flashing?


问:
Create a widget that displays an activity from any app
I want to create a widget that will display an activity from another app (not something I built). For example, I want to have a widget that shows the stopwatch activity from the clock app.

I am not looking to do this as part of an application I am building, but as a customisation. I tried KWGT, but was unable to find how to do it. Is there any way to do this using KWGT, or similar apps. If there are other alternates, please tell me.

I am on Android 10, if it is relevant.

Thank you in advance.


问:
Turn off frp after reset
I have an Aspera Jazz 7.0 which had frp  turned on. Because of weird network issue, I had to reset it. But I forgot my account password and the phone number. I can go with a new account, but I can't turn off the frp . I tried fastboot. But can't hard reset it. How can I turn it off?</p>

Title: Turn off frp after reset


问:
Prevent the uninstallation of Chrome's extensions on Kiwi Browser
So I am on Kiwi Browser which allows me to use Chrome's extensions on Android. This is great and all, but I want to prevent the extension from being installed. I am doing this because of self-control and not to waste my time on different websites.

Is it possible I can make the extension uninstallable?


问:
Galaxy Tab 3 10.1 GT-P5210 won't turn on after trying to hard reset
I have Galaxy Tab 3 10.1 GT-P5210. I forgot the lock screen password, so I tried to hard reset the device using the recovery menu. (Power button + Volume up).
When I tried to hard reset, I got a lot of errors. I don't remember all of them, but I know that one of them was E:format_volume: make_extf4fs failed on /dev/block/mmcblk0p9, and other error was E: failed to mount /cache (Invalid argument).
The other errors were similar.
I tried again, and the same result.
I tried the option of 'wipe cache partition', and I got similar errors. (Or the same.. I'm not sure)
After that, I decided to try to get into the recovery menu again. So I pressed the reboot option, and I was pressing the volume up with the power button while it was rebooting.
And then, nothing happened. The device didn't power on again. I tried to charge it, with no success. I also tried to do a soft reset (Power + Volume down), and nothing happened.

There is something to do?

Thank's!


问:
Navigation bar no longer hides in some games since Android 11
Since updating to Android 11, I've noticed some games I used to play no longer hide the navigation bar as expected.  Some apps, however, work as expected.

One game in question I have is Carmageddon, with the navigation bar visible on the right.

I have tried:

Checking for updates (no update since 2017)

Swiping from top, left, right, bottom

Restarting phone

Is there a way to restore the original behavior where this game would be able to hide the navigation bar?


问:
Can I implement firewall-like internet blocking from ADB on a per app basis on stock Android?
Instead of using 3rd party app freezers, I've been using "pm disable-user" / "pm uninstall" for years to disable/uninstall bloatware. However, some apps, if uninstalled (or even disabled sometimes), bootloop the device or just break basic functionality.

So, I wish to block internet access to that bloatware which indirectly prevents me from removing it.

Is there an adb command to implement internet blocking on a per app basis, like "pm uninstall" is for uninstalling?

(Yes, there are plenty firewall apps, but why rely on a 3rd-party app for something you can do yourself?)


问:
Google Speech recognition doesn't consistently enter the speech into app text field
I cannot figure out the whole pattern but much of the time these days if I use Google Speech to recognise some text to put into a text field eg Facebook's or Messenger's, it successfully recognises the text (it shows me) but then when the popup displaying the text goes away, it leaves the text field unchanged, instead of entering the recognised text. It seems to happen mostly if I do some speech recognition, then edit or move the cursor, then some more speech recognition.

Is there any way to force the recognised text into that field or get it into "paste" so I can paste it in?

(Using a Huawei P20 Pro running Android 10 and Microsoft Swiftkey to "activate" Google Speech).


问:
Is it possible to run jar files in an android application?
I am a begginer in android and I want to develop an application which show a list of jar files to user and user can choose one of them and run it. Is it possible to run a jar file in an android application? (not as a library)
if yes, how does it run? I mean, a jar file needs to run in JVM but an apk file runs in ART.</p>


问:
Would a higher than recommend spec SD card work just as efficiently?
My phone manufacturer recommends a class 10 sd card. At the time my phone came out, UHS Speed Class: U1 and Video Speed Class: V10 was the latest class 10 sd card.

However now there's V90. But since V90 is still classified as class 10 (as far as I know), would it be compatible with my phone? Would it work just as efficiently as the class 10 version that was available at the time my phone came out? Would the higher write/read capacity of the newer SD technology cause any hiccups? Or is it going to be
where it would only be a case of it not being used to it's full potential?

Phone: Motorola C Plus.


问:
How to turn on tap visual feedback from the command line
There is an option in debug mode that shows/hides tap visual feedback:

This is what happens when you turn that option on.

I like to quickly record videos from the command line and I like to toggle this option from the command line as well. How can I do that?


问:
Why can't I use light theme on non-oled screens when battery saver is on?
This is what I see in display settings when battery saver is on

How does this matter on non-oled screens? I'm using a nokia device


问:
Termux messed up C++ pointer with clang compiler
Here is a simple C++ code named test.cpp to detect whether a pointer is null.

```<code>#include"iostream"
using namespace std;
int main()
{
    int *a;
    if(a!=NULL)
        cout<<"a points at something."<<endl;
    else
        cout<<"a is a null pointer."<<endl;
    return 0;
}
</code>```

I compiled it in two devices:

Termux in Redmi-K20-Pro Android phone (unrooted) with clang: clang++ test.cpp -o op

gnome-terminal in Raspberry-Pi-4B with gcc: g++ test.cpp -o op

Then I ran the program with ./op but the results were different:

Termux printed a points at something

gnome-terminal printed a is a null pointer.

Obviously the second result is right.

Because both devices are based on ARMv8 architecture, so no hardware problem exists. There must be some problems with Termux, the compiler, the Android system root, or something else.

Is there any solution to fix this immediately?


问:
TWRP mount storage
I am using Lenovo A6000,I am unable to mount storage, system etc. in twrp , i have no os installed only twrp. I checked some posts here about formatting and then wiping and changing parition type...but none ssems to work . how can I mount to internal storage so I can flash custom os... I have checked backup in twrp it shows some folder like boot, system image etc data is present upto 2gb but nothing in /system folder. please HELP

Title: TWRP mount storage


问:
Enabling geolocation in web browser
I'm partially unable to get geolocation within a web browser.  When the phone-wide "use wifi for location" box is unchecked, going to a new website the requires geolocation fails.  For example, maps.google.com gives the the error "Your location could not be determined."  When I check the box, I get the permission request dialog, and after that, I can get geolocation regardless of the "wifi geolocation" option.

The GPS works fine, and the Maps app works fine.

I have enabled geolocation in the browser settings.

I have tried this with the stock browser, Dolphin, and a custom app with a WebView (with the appropriate permissions set up).  I get the same result on all three.  I also got the same result using the Android emulator on my PC.

The phone does not have a cellular plan.

Android 2.2 on a Motorola Droid

At this point, I have a workaround, but does anyone have clues about what's going on?

ContentLicense: CC BY-SA 3.0

Title: Enabling geolocation in web browser


问:
How to disable sending data in EMUI 10.1 (Android 10) to Huawei servers?
I have tablet (Huawei MediaPad M6) with EMUI 10.1 (based on Android 10).
My tablet regularly requests to the following domains:

```<code>pushtrs9.push.hicloud.com
grs.dbankcloud.com
grs.dbankcloud.cn
grs.dbankcloud.eu
grs.dbankcloud.asia
</code>```

Also sometimes makes requests to the following domains:

```<code>query.hicloud.com
configserver.platform.hicloud.com
</code>```

I blocked all these requests with Blokada app. Also I uninstalled about 60% of all system apps via adb. This helped to get rid of some of the requests. But the above requests are still ongoing.

How to terminate all these requests? Everywhere in the license I refused to collect data and statistics. Should I uninstall more any system apps? Or disable something in the settings?

OwnerDisplayName: Denis


问:
Does LTE Band 20 (800) really matter?
I'm looking to import Redmi K30 Ultra, and since it is not available globally (only Chinese ROM), in the specs it is stated it does not support LTE B20(800). My operator provides following coverage:

4G -> B3(1800) and B20(800)

3G -> B1(2100) and B8(900)

2G -> B3(1800) and B8(900)

All other bands are supported by the mentioned device.

Now, I have some basic understanding about the topic, such as, lower frequencies means broader coverage but lower speeds and vice versa.
But I am wondering if someone could tell me will I really notice the lack of B20 (e.g. will device be prone to losing 4G connection and going to 3G often). Are there any experiences regarding this problem (not necessarily with this phone). Thanks!

Title: Does LTE Band 20 (800) really matter?


问:
Is it a requirement for an Android Go image to use f2fs format for data partition?
I am currently performing performance testing using PCMark on a 2GB Ram Android Tablet but changing its OS (Android 10 vs 10 go). I have noted a considerable increase in storage performance (around 40%) and around 5% increase in CPU and Graphics processing performance.
I have been trying to find other differences between the two systems and found that the Android 10go image uses f2fs for data partition whilst Android 10´s one uses EXT4. This would explain the increase in storage performance...
Is using a f2fs format a requirement for an Android 10 go image?
My main goal is to confirm if it makes sense to make the switch.</p>


问:
How can I change pdf page color on Android?
I downloaded a few ebooks in pdf and I want to change the white pages to a color easier on my eyes. Adobe Acrobat's accessibility options seem to be missing on Android and I don't like inverted/night mode. Which apps let you change page color when reading pdf on your phone?</p>


问:
Dynamic binding of ports of a process. How to change to fixed port?
There's an app on my phone which binds dynamically to local ports over 31000(since my local port range is 31000 to somewhere around 60000). I want the application to bind on port 25 (smtp) because the port is not monitored or controlled by the network. I have searched the internet for methods to do this and  I have come across the iptables method in which it said I must do port redirection but that's for servers.

Any help would be greatly appreciated.


问:
How do I recover deleted text messages and attachments on Samsung Galaxy Note10+?
While attempting to delete an SMS ad on Samsung Galaxy Note10+, I did not notice that every message in my log was checked and I deleted my entire text history.

How do I recover deleted text messages and picture attachments on it?


问:
Is it possible to use virtual camera on android phone?
Well i know it's possible via Emulators or vm , but my question is about  an actual android phone
is it possible to do something like manycam on windows ?

i've been searching internet for almost two days and can't find any useful information even either if it's possible or not


问:
Tecno Camon 15 pro stuck in bootloop
My Tecno Camon 15 Pro is stuck in bootloop after I was trying to patch boot.img file.

Phone Specs:

My phone's processor is MediaTek Helio P35 (MT6765) & it was running Android 10 build CD8-H655BCD-Q-GL-200708V314. Full phone specs here if it helps. Bootloader of the phone is already unlocked.

What did I do?

I downloaded ROOT.zip  for my phone from HalabTech and extracted boot img. I patched it and flashed it onto my phone.

What phone's condition is?

It rebooted and since then it just getting rebooted again and again. It vibrates, shows Tecno logo for a few seconds and turns off. I cannot turn it off neither can I boot into recovery or fastboot. Its totally stuck and I get different errors from SP Flash Tool but not once which are as follows while trying to flash a ROM file I grabbed somewhere on the internet:

It does not have any other issues and I know it was the boot.img flashing which did this. So what should I do? Any help is highly appreciated!

Title: Tecno Camon 15 pro stuck in bootloop


问:
Bundled Microsoft apps keep getting updated even though they are disabled
My phone came with several non-uninstallable "factory apps". Three of these are Word, Excel, PowerPoint. Even though I have disabled these, and uninstalled any updates to save space, the updates keep getting re-installed.

How can I find out why this happens and how can I prevent this? The updates take more than 500 MB of space, which I don't want to waste on something I don't use.

More details:

This is a Samsung S7 running Android 8.0.

I disabled updates for these specific apps in Google Play (I had to temporarily re-enable them to be able to do this). I disabled all auto-updates in the Samsung Galaxy Store. There are no other app stores on this phone.

The apps stay disabled, yet updates are still installed for them, taking up storage.

These are the only factory apps that get forcibly updated. Other factory apps that I disabled don't get updated.


问:
Modify shared_prefs XML file from adb shell
My Tolino Vision 4 HD e-book reader has no vi, vim.tiny or any other text editor executable, so to edit files I have to "adb pull" it to my PC, modify it there and "adb push" it back.
This takes too long for quick tinkering. "adb push" also sets new user+group to the file (root:root) instead of the original permissions.

Is there an in-built cli tool to modify application shared_prefs XML files while inside adb shell? (Add a new property and value, modify existing property's value, delete property)

I already patched adb to allow root access, so permissions are not a problem. I'm just asking for a convenience tool.


问:
How do I print using my phone?
I own a Redmi Note 5 Pro. Before the last update (a few months ago). I could print using my phone after connecting it to my printer with a cable. After the recent upgrade, I'm unable to do so, because I get a message that says that I can only wirelessly print now. Here's the screenshot.

Is there a way for me to be able to print using my phone connecting it with a printer still or is this change from a setting that allowed me to connect a wire with the printer and print permanently gone? If there's a way to get the printer to still work with my phone, that'd be great for my studies.

P. S. My printer doesn't support wireless printing. It is an EPSON L3100 printer. I've tried apps such as Epson iPrinting and NokoPrint (it's just a highly rated app). Neither of these worked.

Here's a screenshot of the details of my phone

Title: How do I print using my phone?


问:
ADB immersive mode and wm overscan commands no longer work on Android 11
I upgraded to Android 11 without knowing that it broke compatibility with existing immersive mode and window manger overscan adb commands. Are there new alternatives to these commands in adb now? I was specifically using:

adb shell wm overscan 0,0,0,-136 (reset: 0,0,0,0)

adb shell settings put global policy_control immersive.status=*

For reference I'm running GrapheneOS on build number RP1A.200720.009.2020.09.25.00 on a Pixel 3 with Android 11 on Kernel version 4.9.223.


问:
Is there a way to hover in the mobile (Android) version of Microsoft Word?
I have a .docx document with images that are animated when you hover over them. It works fine on my computer, but when I copied the file over to my phone, I cannot work out what to do to make them start.

Is it possible? And if so, what is the most simple way to do so?


问:
How to disable mobile data, in a way that's hard to re-activate, while still allowing mobile calls, for a child's phone?
I want to disable mobile data in the phone settings for my child in a way that makes it hard to re-activate it. Just turning off the "mobile data" setting is far too tempting for them to undo.

What I've tried:

Under Settings > Connections > Mobile Networks > Network Mode, I updated the setting to "2G only", which disabled mobile data but also disabled mobile calling. So that doesn't work.

Under Settings > Connections > Mobile Networks > Access Point Names > Data, I tried changing the "APN" value and also (separately) tried changing the "Mobile virtual network operator value", but mobile data still worked with either of those options changed.

Is there a different setting that will disable mobile data while still allowing mobile calls?

Am using Android 10 on a Samsung phone in New Zealand.


问:
Uninstall Android app from Google Play website
I have installed one of the android apps, which is for double tap to screen on/off, but this app is  misleading. Unfortunately I gave admin permission for this app, after installing this android app, My mobile screen is never showing up. But, I can hear phone rings, message tones, and everything working fine. How do I make my screen visible now??

Is there anyway to uninstall that particular app, from any website?? I'm pretty sure that, screen is not popping up because of this app. Please help me here.


问:
So, I have an app called "ww_easteur001", never installed it, and it behaves... weird I would say. Need help with it
So, I never installed this app, it just appeared at some point on my phone. I didn't do anything at first, thought it was something related to android because it has an android icon.

The problem is that sometimes, when I would of opened Chrome, it would of opened with a site already on it (something with some kind of clickbait game) and a ww_easteur001 notification. Sometimes that notification just popped up without anything happening "apparently". I unistalled it a while ago, thought that it was gone, after a few weeks it appeared again. Uninstalled it again, appeared again, etc.

Today I looked closely and I saw that it had access to my Phone (calls and numbers), Messages and Storage, and I found out that at some point a message was sent to a number not in my contact list that seemed like pure gibberish. (My luck that I don't have credit atm, so the message didn't go through). I obviously suspected that app.

So... Need help. I'm not entirely sure what I should do (I know I should of done something the first time when I saw it, but I was dumb), I'm not sure what it does exactly, but definitely not something good. I cannot find anything online about it / similar experiences...

Now, worst case scenario I can just reset the phone and/or buy a new one, since this one is trash anyway, but I'm still confused about what's all this about, and I may or may not be a little bit scared to what it has done this whole time.

EDIT:

Model number: Xylo P

Android version: 7.0


问:
Programmatically Set Minimum Width in Developer Options
How do I programmatically set the Minimum Width in Android's Developer Options from Llamalab's Automate app?

I use Your Phone on Windows 10 to view my phone's screen.  I maximize the window to get the full size of my monitor. With a minimum width of 1500, the phone is kind of like a tablet.  I would like to set the Minimum Width to 1500 when viewing the screen on my monitor and 486 (the default?) when viewing the screen on my phone.

Using the "Settings finder" flow from the Community, it told me the following:

```<code>Category: secure
Name: display_density_forced
Value: 188
</code>```

I then used a System setting set block in Automate.  This threw an exception because Automate does not write permissions.

I connected my phone to my PC via USB and ran the following command to grant write permissions to Automate:

```<code>adb shell pm grant com.llamalab.automate android.permission.WRITE_SECURE_SETTINGS
</code>```

Now the System setting set block does not throw an exception.  However, changing the setting via the block does nothing to the UI.

If I run the following command on my PC, then the UI changes.

```<code>adb shell wm density 188
</code>```


问:
Android Whatsapp - How many stickers you can add as favourite on your mobile?
What is the limit of the number of stickers that can be stored as favourites in the mobile version of Whatsapp?</p>


问:
HTC one infinite reboot. How to turn off bluetooth from adb?
This is my first question here...

My problem is similar to the one explained here:

HTC. infinite reboot. How to turn off bluetooth from adb?

..my HTC one rebooting continuously due to bluetooth. So I need to turn bluetooth off from adb or other.
I don't have any experience with adb/fastboot nor with recovery mode. I have a Mac with Android Studio installed (including SDK and adb+fastboot). (I'm only starting to learn "android programming").

I would like to try the commands posted in the above link to solve my issue but I have some problems:

To enter the Recovery-mode menu I pass through the "Recovery" option on the boot menu (see image).

In the HTC site they list the options available on the Recovery-mode menu. The options of this menu are the same I have when I enter recovery-mode, except that there should be an "Apply update from ADB" option that is not present on my phone. (see picture)

I know adb installation is correctly set up (I use it to connect to my other phone to test the app I develop on Android Studio).

I know that my mac can "see" my HTC when it's connected to USB (for a short moment, before rebooting, when the Android UI of my phone has already load, my mac shows me a message - from Android File Transfer application - telling me that it can't connect to the device).

When I'm in recovery mode and I connect my phone through USB and I enter the ADB command "adb devices" on my terminal and my HTC phone is not listed.

Do you think I have any chance to fix this problem ? I'd like to avoid factory resetting my phone.

Any help/guidance on how to operate would be very much appreciated. Thanks !


问:
How safe is my Nexus 6 with Android 7.1.1 and the possible latest update (Oct 5th 2017)?
I found my old Nexus 6. No SIM in it, just connects to the Internet via my home wifi.

I've tried to catch the latest updates, upgrades, and security patches, then I realized, unless I doing something "big" like changing rom, or whatever it is called, which I definitely do not want, I stucked with 7.1.1 and its latest security update Oct.5th 17.

My question is it safe to use?

Nothing special sensitive there, but I would like to log in to Google Play with my account to download and by some apps


问:
Mobile legends not compatible after unity fix
I want to play mlbb on pc, but it gets black after logo phase. Because its unity game I patched unity fix. Others game like granny now works but mlbb vanishes if installed. Its in data/app. If I uninstall with pm and install, it says not  compatible.

Pm install says :
cant find matching adis,could not extract native resources.

I managed to get it run on primeos somehow. But can't do it anymore.


问:
how to take android browser offline when my external ip changes?
My ISP only provides ipv4 ips dynamically. I have tracked them using a termux script and found that i can get back ips after reconnecting a couple of times.
Now what I want is to restrict my browser to a certain format of ips.

My idea:
Running a local simple proxy in termux and browsing through that. Whenever the connection gets lost, a script will shut the proxy and check the new external ip. will only restart the proxy when the format matches.

Now I am trying to figure out how to run a script whenever my data connection is lost ?

Please help me with your ideas regarding this or anything related to my main question. Thanks


问:
"Unable to open this file on your device" : How to download the file to Android?
Using the Android app LINE, a friend sent me a file, and I would like to download it.

Upon tapping the file, the download takes a few minutes then displays:

I don't have access to a PC.

I can't find the file in my Android's folders Downloads nor Downloads/LINE nor data/jp.naver.line.android/temp/temp_download.

Question: How to get the file?

Maybe the file is saved somewhere in a temporary or internal folder?

Maybe I can use an app that would pretend to open the file, but in fact save it? I tried this trick with ToGoZip but it did not work, ToGoZip just said it could not open the file.

Any other trick is welcome! The file is a .key presentation, if that matters.


问:
Can’t move photos to SD card (because of “insufficient storage”) or make camera automatically store them there
My wife has a Samsung Galaxy S9 with Android 10 on it. It has an SD card which has about 11 free GB, and the phone’s internal storage has only 400 free MB or so.

I have two questions concerning photos/videos and storage:

The phone’s camera is configured to store photos and videos in the SD card. However, we’ve found it arbitrarily stores them in the internal storage or in the SD card rather than respecting the setting. Why could this be happening?

When we tried to move a photo from the internal storage to the SD card (by going to Gallery, selecting the photo, tapping the three dots at the top-right corner and tapping “Move to folder”), it says there isn’t enough storage in the phone before even asking where the photo should be moved. This happens with all photos in the “Camera” folder in the internal storage, whether or not they’re uploaded to the cloud. It isn't a memory (RAM) issue (unless I'm mistaken as to how virtual memory works), because even if all of the phone's real memory were used up and the phone had to create virtual memory, the size of the required virtual memory would be equal to the size of the file(s) we're trying to move, and 400 MB is much greater than the size of one photo. (Not a duplicate of this question, which is about moving apps to an SD card.)

We’ve tried unmounting and remounting the SD card, but that doesn’t solve either of the problems.

Thank you.

Edit: Added a note on why I don't think memory has anything to do with problem 2.


问:
Only use 2G for calls?
My current phone unfortunately does not support VoLTE, so I'm limited to 2G for calls.

However, for all other uses (internet, messaging), even the worst LTE reception is still infinitely better than 2G. In areas with low LTE coverage, my phone switches down to 2G, despite me not intending to make a call.

When I then wish to go online, I have to manually open up the secret menu, force it to use the weak LTE signal (by setting it to "LTE ONLY"), and remember to turn it back to its automatic mode when I want to make or receive a call.

Is there a way to do this automatically? Only ever connect to useless 2G when making calls, and forcing LTE in all other situations?

The "preferred network type" option in the settings ("LTE/3G/2G (Auto)", "3G/2G (Auto)", "2G Only") also seems to be very backwards for modern usage.

Title: Only use 2G for calls?


问:
this app is associated with a different google account
I am using 5-6 gmail accounts on my android phone.
There are situations when I access Google Files app on my laptop and then on phone it shows that I am signed in to play store via different account.

I want to make sure on laptop when I open Google files app and install an app that installs app on my mobile I am on same Google account.


问:
Recover phone data with a broken screen
Is it possible to recover data from my Xperia X whose screen is shattered(completely black). It's running Android Oreo and USB debugging is OFF. Unfortunately screen replacement is not available in my region for Sony Mobiles anymore :(</p>

Title: Recover phone data with a broken screen


问:
Found a locked phone, how can I access the contacts?
I found a P30 Lite which I would like to return to the owner. However, I have no way of contacting anyone on the phones contact list as the phone is locked. Is there a way I can recover the data to a PC or somehow access the contacts? Note that USB Debugging is not enabled.</p>


问:
Getting adb root: I did unpack and repack the boot img yet adb root doesn't work
my android is a Marshmallow 6.0.1 (EDIT: It is Samsung!) I just unpacked the boot.img and edited the build.prop by setting:

```<code>ro.secure=0
ro.debuggable=1
ro.adb.secure=0
</code>```

repacket it, flashed it and everything is in it's place.

I no longer get the adbd cannot run as root in production builds error

BUT If I run adb root I get the restarting adb as root and nothing happens afterwards.

Can't adb remount because Not running as root. Try "adb root" first.

what else do I need to change?

EDIT: I just ran adb root again and this time the phone disconnected the USB:

```<code>error: protocol fault (couldn't read status): Connection reset by peer
error: write failure during connection: Connection reset by peer
</code>```


问:
Relock bootloader - "FAILED (remote: unknown command)"
I'm getting rid of my Sony XZ2 Compact. I just flashed the original firmware using Emma and now I'm trying to relock the bootloader.

I've tried running fastboot oem lock and fastboot flashing lock both as a normal user and root with no avail. I always get the following error:

```<code>>> fastboot oem lock
...
FAILED (remote: unknown command)
finished. total time: 0.000s
</code>```

When I run fastboot devices I can see my phone listed. USB-Debugging is active in the developer options.

How can I lock the bootloader so that I don't get the screen with "Your device software can't be checked for corruption. Please lock the bootloader." when booting the phone?


问:
Does `adb backup` also backs up what is backed up by Android automatic backup (that is stored on Google Drive)?
I have two backups: one from Android automatic backup, stored in Google Drive; another is what I manually backed up with adb backup.

What are the differences between the two? Do I need to restore the one from Drive as well if I reinstall my OS?

There is a similar question but it doesn't answer my question.


问:
How can I open Instagram links inside my Twitter app?
I'm looking for a way to open Instagram photos inside my Twitter app. I'm using Plume now, and it can open almost all the photos inside the app. When press and hold on the link the photo expands to the actual size, so Plume doesn't open the browser for every photo, and it's very convenient and quick. However, this technique doesn't work with Instagram links. When you select those, Plume opens the browser and redirects to the Instagram site, which takes several seconds. Twitter for Android is worse - it opens every photo link in the browser.

Is there a way for me to open photo links inside either of these apps quickly? If not, are there any alternative Twitter clients that support this?


问:
Rotating Android bootup screen
I have a Nexus 7 (2nd generation) on Android 6.0. I am able to rotate and fix the screen on landscape using adb shell content. I am also able to adjust screen dimensions and resolution using adb shell wm.

Now, the only thing I need to really do is figure out a way to rotate the entire device to actually be permanently in landscape mode so that when it reboots the Android logo and everything is in landscape.

Is there any way to do this? My device is rooted already if that helps.

Title: Rotating Android bootup screen


问:
Format an SD card from TWRP recovery using shell
I'm trying to format/partition an SD card (that was used as an encrypted storage on an android phone) because it only shows as 15 MB while it's supposed to be 2 GB.

I was intending to install a ROM from TWRP recovery but made a mistake and wiped everything including the SD card and selected "format" to remove encryption but forgot that the SD card had the zip to be installed...

I don't have access to a reliable USB cable which is probably why adb sideloading didn't work for me.

Here is what I tried from the TWRP terminal:

```<code>~ # df -h
Filesystem              Size      Used    Available   Used   Mounted on
tmpfs                   361.1M    16.0K   361.1M      0%     /dev
tmpfs                   361.1M    20.0K   361.1M      0%     /tmp
/dev/block/mmcblk0p19   2.2G      38.7M   2.1G        2%     /data
/dev/block/mmcblk0p19   2.2G      38.7M   2.1G        2%     /sdcard
/dev/block/mmcblk0p16   196.8M    4.4M    192.4M      2%     /cache
/dev/block/mmcblk1p1    16.0M     24.0K   15.9M       0%     /external_sd
</code>```

(Why tmpfs and mkcblk0p19 listed twice with different mount points?)

I know that the block mmcblk1 is the sd card because it disappears when I physically remove it and reboot.

I tried the following:

```<code>~ # umount -f /dev/block/mmcblk1p1
...

~ # fdisk /dev/block/mmcblk1
Found valid GPT with protective MBR: using GPT

Command (m for help): p
Disk /dev/block/mmcblk1: 3862528 sectors, 1886M
Logical sector size: 512
Disk identifier (GUID): ...
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 3862494
Number   Start (sector) End (sector) Size Code Name
1    2048   34815   16.0M   0700   android_meta
2    34816   3862494    1868M   0700 android_expand

Command (m for help): d
Selected partition 1

Command (m for help): d
No partition is defined yet!

Command (m for help): n
Command action
    e    extended
    p primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-239, default 1):
Last cylinder or +size or +sizeM or +sizeK (1-239, default 239):
...
Command (m for help): w
...
</code>```

But it didn't change anything.

And, I see the files /dev/block/mmcblk1, /dev/block/mmcblk1p1 and /dev/block/mmcblk1p2.

But mmcblk1p2 is not in fstab:

```<code> ~ # cat /etc/fstab
 /dev/block/mmcblk0p17  /system       ext4  rw  0  0
 /dev/block/mmcblk0p19  /data         ext4  rw  0  0
 /dev/block/mmcblk0p16  /cache        ext4  rw  0  0
 /dev/block/mmcblk0p15  /efs          ext4  rw  0  0
 /dev/block/mmcblk1p1   /external_sd  vfat  rw  0  0
</code>```

I don't have a card reader but I tried the sd card in another phone and plugged it to windows and it shows 16 MB there as well.

Question: How do I format the sd card from android terminal so that I can use it normally again?


问:
How do I prevent apps from getting installed onto my Pixel?
I'd like to prevent any apps from being installed on my Pixel.

I tried this with Google Family Link, but you can install apps rated E.

I also tried this with AppBlock, but I can install apps from play.google.com from my computer.

I'd like the primary user on this phone to no longer be able to install apps at all.

An acceptable solution would be to password protect installing new apps, so that someone with the password could install apps.

OwnerDisplayName: Cauder


问:
My Firmware do not have emmc, raw program and patch file
I own a heavily Bricked Nokia X Rm-980. Currently, I am trying to bring it back to life.
It is detected as Qualcomm HS_USB QDLoader 9008 (Com3). After spending some time online, i got a possible solution, flashing it using QFIL. I downloaded the firmware (LINK), it didn't have 3 files needed to start the flash process which were raw program XML file, patch file, prog emmc file. I looked up Online for these file specifically, But found nothing.
Do anyone know what should I do</p>


问:
Access files of Android device without the login code
Long story short. The father of a friend of mine died and he asked me if I could have a look at the father's phone to see if there might be any images or other stuff he might find relevant. The problem however, is that it is locked and no-one in his family knows the code.

I thought of a few ways to tackle this, but most of them require USB debugging to be enabled (which it is not), so stuff like ADB or so is impossible (or is it?).

Then I thought of the program Autopsy, which we used in school to scan an entire device. However, back then, the image of the device was handed to us. I understand I could use the program dd to copy an raw image, however, is it possible to do so on a locked Android device which is not rooted?

Any other suggestions to how I can solve this? Thanks!


问:
How to backup, restore and share Android settings on a multi-user system?
I have a Magisk-rooted Android 10 device. I want to:

backup my Owner user settings;

clone some settings (background images, sounds, vibrations, etc.) from Owner local user to other users (Work, Guest, etc.);

use only built-in or open-source 3rd-party tools.

What are the options available?


问:
How to change the order of the timers?
How can I change the order the timers are displayed in the default clock application? I've got about two dozens of them and it seems I can only add new ones in front and not change the order.</p>

Title: How to change the order of the timers?


问:
How do you animate when you press the power button to lock the screen on s10?
On my old j3 when I press the power button i get this cool transition/animation when the screen locks. The black thing that covers the screen vertically from the right and left side. Similar to how you get it with samsung tv but it does it from top and bottom.</p>


问:
How to fix bad sector on NAND Flash Memory
A week ago, I flashed my Nexus S 4g with a custom kernel (Matrix) and ROM (CWM9). On reboot, my NS4G always bootloops, stuck on bootloader loading screen, and never gets to the Android System. It had the same result when I tried to flash it back to a stock ROM.

I removed the battery, put it again and tried to boot into recovery to use adb to check my SD card content with parted (I think there was a problem on partition). In parted I can reformat it using adb or recovery, but its content couldn't be changed. I think there was a problem with NAND flash.

Is there any way that I could Reformat NAND flash to fresh state?