问:
How to disable MTP mode in an Android phone with a broken screen (USB debugging enabled)
The screen of my phone broke some months ago, but luckily I had already enabled USB debugging and I trusted my PC, so I could use the phone with a USB with Vysor (a free open-source app) and I've been using it like that for months.

I was casually using the phone and I just changed it to MTP mode (I clicked the just once button so I could use the phone again, it's not the first time I do it and it went back to normal before) but now every single time I plug it in, it goes straight to MTP instead of charge only as it should be.

I tried resetting the phone by taking the battery off and putting it in again, no success.

Things that may be useful to know:

The volume button doesn't work at all

It's an LG K10 M250 without root, Android 7

I tried 3 different USBs and it's the same story

It's hopeless to touch the screen, saying it again just in case

ADB Drivers are installed, Dr.Fone and EaseUS recovery apps tell me that debug is disabled even though I know that it's enabled.

I won't fix the screen of this phone, the fix's worth another phone, which would be silly.

I googled a bunch and the results only show people with debugging disabled and/or MTP disabled, I have the exact opposite case, and I do need the phone to use banking apps and things like that, I would appreciate it if people want to suggest stuff I could do, my brain thinks that there should be a trick since the phone is connected after all.

I found the drivers on the device manager, it straight up says that it isn't connected. I disabled MTP Automount on Linux udev configuration and now a pop-up says "Unable to open MTP device "001,009""


问:
How to set up L2TP connection on Android?
I and some of my friends are trying to connect to an L2TP connection. We set it directly through VPN options in Android's settings, but the problem is that sometimes 1 username and password gets set up in 1 phone but does not set up in another phone.

Thus I'm looking for an alternative way (e.g. 3rd-party VPN apps?) to set the L2TP connection up there.

OwnerDisplayName: Farhang Amaji

ContentLicense: CC BY-SA 4.0


问:
Android 11 displays that apps take up 0.00B storage under App Info while cache cleaning apps show they each take up >100MB but can't clean the cache
I recently asked about something related here (why is this not managed by Android itself / system settings).

When I go to Android settings -> manage apps -> Youtube (App-Info) it shows me that it takes up 0.00B of disk space and the button "Delete data" (at the bottom) is disabled.

However, various apps that display how much storage space is taken up (including a stock one) and all the cache cleaner up that I tried show that the apps, including the Youtube app which takes up many 100MBs of space, take up lots of storage space with their caches.

This is probably why neither the "Junk Cleaner" of "Phone Cleaner" by "Super Cleaner Studio" nor the "Cache-Cleaner" of "1Tap Cleaner" work.

The former displays how many GBs it can free and does run the cleaning as if it would work but no storage space is actually freed up and the latter opens the App-Info of all the selected apps (each displayed as taking up 100s of MBs) just like I did manually as described earlier but can't proceed as the "Delete button" there is disabled (the app displays a small frame at the bottom of the screen where it iterates nr of "#nr, wait 1s" but nothing else happens so it's stuck at trying to delete the cache of the first app).

I don't think it's because of my firewall (NetGuard) and I do have the latest version of Android for my device as well as the latest Google Play system update.


问:
Transfer WhatsApp messages from iOS to Android
I want to move my WhatsApp messages from my iPhone 5c to my OnePlus Nord N200 5G running Android 12. I've been running WhatsApp in an iPhone 5c with iOS, which is the last iOS version for this iPhone. Recently WhatsApp forced users to upgrade to the latest iOS app, but the latest version is only supported for iOS 12+. I am now locked out of WhatsApp.

Before I was locked out, I followed the official steps here multiple times to perform this migration, but the messages are never transferred to Android. Under "How to migrate from iPhone to Android 12 and above", after substep 5, I am never prompted to scan a QR code and open WhatsApp iOS; I get no Whatsapp-related notification on Android. I don't get an error message. I tried the transfer both during the initial setup phase after the factory reset and after you get a notification asking you to finish setting up your phone.

There's an app called MobileTrans that claims to transfer WhatsApp messages between the two platforms, but it's not free, and I've heard your data is transferred to a third party.


问:
Clone Android phone to VM (Virtual Machine)
I was thinking about copying my phone to a VM for exploring and learning.
Without rooting my device, can I somehow clone it?

By cloning I mean dd / copying disk files and not downloading the same apps or recreating a similar environment.

Once I have the raw.img file of the phone, can I boot it as a qemu guest VM?

I wonder if there are any hardware issues that would prevent me from booting this new android VM, i.e. in case the android phone is Samsung then perhaps the whole Knox feature will prevent booting?


问:
System internal storage expected sizes on android smartphones
The storage numbers that appears in Android devices are hard to understand.

I have look at Android devices with internal storage of 64GB and with System occupying 24GB and Android devices with internal storage of 32GB whose System takes only 9GB.

What is the reason for this variability? When you install new App's it takes Application space and System space?

Is there some specification on how much System could take on an Android device by OS? LIke Android 11 (from 5GB - 10GB), Android 12 (10GB to 15GB)  etc...?
Or the Android OS familiy has nothing to do with System space and all it depends on the manufacturer, like Samsung could decide to take 40GB of space under System if he wish?

Regarding the space taken by System, how we expect the space would remain constant or we must expect it would increase linearly over time? At which rate?

Sorry if the questions have no sense. Feel free to


问:
Can a user recover photos deleted from DCIM/Camera in Android files via USB-linked file move to Windows 10?
Yesterday, I connected my phone to my Windows 10 PC, and transferred all of my camera photos to a new Windows folder via Windows Explorer using the 'Move' function. I have since learned this was a bad move.

All of the files appeared to have moved to the new folder, and I was able to open them on my PC with no problem.

That is, until I unplugged my phone from the PC.

Each of the .jpg files are registering as being comically large ie.

Size: 8.7 GB

Size on Disk: 8.00 KB

Additionally, they all have the shortcut icons:

I have tried some of those scammy-looking recovery tools that scan for images, but they only pull things that are stored in app caches such as telegram, Facebook, text messages, etc. but not any of the approximately 1,200 photos transferred.  Some of those software packages appear to have additional functionality that could be used if my phone were rooted.

I have already checked cloud recovery and backup options such as android recovery tools in settings, google photos, clouds, trash bins in photos and file manager etc.

Windows appears to have, at the least, wiped the reference of the data from the phone completely when it moved, and the files stored on the PC now open as corrupted files.

1) Would this type of transfer have destroyed the binary data, or only have removed the reference?

2) Would rooting my phone now be the only plausible way to now partially recover this data?

3) Additionally, is it likely that anything about the data moved to my PC is useable or recoverable on the PC rather than attacking this issue via the phone?


问:
Different icon. Does anyone here know what this notification means?
It's something like a raccoon or panda or cat.


问:
Is it possible to have two buttons/windows that overlap on top of each other, both respond to a singular mouse/touch event?
I am running Android x86 (therefore, rooted by default) on my laptop, with a Desktop Mode launcher installed, this allows me to run multiple app instances on-screen at the same time in the form of little windows.

I managed to install the same game three times and have them each open as if there are three individual apps.

Now, I wish to fully automate my tap farming by perfectly aligning these three app windows on top of one another, and then commanding a macro to continuously click on the given XY screen position.

With my initial question above, my goal is to have the three identical games farm at the exact same time, with a certain button within the games each being pressed at the same time regardless of which window is at the front or back of the screen.

I want to know if this is all possible with the way Android is designed and if there exists any way that does exactly this.


问:
Is there any way we can unlock an android phone or retrieve the lost pattern?
I forgot my screen lock pattern. As I restarted the phone the face lock is not being accepted.
Is there any way I can unlock it or retrieve the pattern without losing my data.

it is the new version of android so there is nothing like forgot password

Thanks


问:
Access Samsung S9 without providing Sim card pin code, no code otherwise to unlock it
My girlfriends mother recently passed away. She wants to gain access to her mother's phone but unluckily it was out of power when she got it. The phone does not normally need any kind of code to unlock it but since it was powered down we need to provide the Sim code which we have not found yet.

I am wondering what will happen if we simply remove the SIM-card? I am uneasy to try if that would lock it further or that we need to provide the puk code instead. She just wants to be able to access it.

Thankful for any answers that might help.


问:
Gmail Android showing no email in primary folder
Since a few days ago, my Android Gmail shows no messages in the primary folder as you can see on the screenshot below.

All the other tabs (social, updates) are running fine.

I have another Google account configured on this phone and all tabs are showing fine also. I confirm (just in case) that I actually have a lot of emails in this tab and I can access them correctly when using the desktop web app.

Also, I still have a notification when a new email arrives, I can click on the notification and see the email, but as soon as I close it, I can't access it anymore since the app always show that I have no emails in the primary tab.

Of course, I have tried to reboot my phone with no success.

How can I fix it?

OwnerDisplayName: Fabrice Lefloch


问:
Confusion about customization of the OS
I have seen this car multimedia system and in the video of it, it says android 10 but looks nothing like it.

Apparently, it can also launch android auto and apple carplay with a carlinkit carplay adapter I assume.

How is this the case? Did they customize the OS to their needs or is this something official or open source? Is it a custom launcher? Say if I wanted to customize the settings app or change the android logo. How would I go about doing that?

I'm not sure if this fits here or the Unix stackexchange.

Title: Confusion about customization of the OS


问:
Need to move data from a specific app from LG Q7+ to Samsung
I have data on my LG Q7+ phone that I need to move to a Samsung Galaxy S22+. The app on the phone is called Note (notes.notebook.memo.pad.color.notepad.locker).

I can transfer the app, but the data does not go with it. I have tried Smart Switch, MyPhoneExplorer, and a couple of other backups. Google backup will not back it up because Google says it is a questionable app. The app is also no longer on the Play Store. Neither phone is rooted.

How to move the data?

Please help,

Thank you


问:
Hide main ui/launcher/profile on specific password
I'd like to have an option to hide my usual apps list, photos, etc on specific pass unlock.
So if I unlock with my usual pass - it is my usual device, if someone requires to unlock my device - I use another pass, it unlocks device but with hidden sensitive data.

We assume there is no option to connect adb on that check (just on the street).

Is it possible? Maybe some launcher or even firmware. I'm ok to root device if needed.


问:
What is the meaning of this status bar?

I switch simcard in my android phone and I notice that my simcard 1 has a weird icon on it. Tried searching it but with no luck.

Title: What is the meaning of this status bar?


问:
Samsung galaxy z fold 4 - app automation help
Last night my wife was playing with the settings on her z fold 4, and she did some sort of app automation.

What do i mean?
She basically told her phone that whenever she opens certain apps, like WhatsApp, Messenger etc, to add a blue screen filter.

I have searched everywhere and i cannot find this setting to turn it off...

can anyone help please?


问:
Why does Android mark my applications as unsafe?
While downloading unsafe modded .apk files from the internet and while installing them there is no prompt of "unsafe app being downloaded". But when I install an apk that I made, there is a prompt (just a warning that the app that I am installing can be malicious). Why does this happen and how can I prevent it from happening in my applications?</p>

OwnerDisplayName: Sammie Ratliff


问:
How can I load a webpage from cache for offline browsing in Google Chrome browser?
In Google Chrome browser running on an Android phone, I opened a webpage under wifi. Now I am disconnected from WiFi, I want to access the webpage loaded before from the cache, but it shows "No Internet" instead. can I see the webpage loaded before from the cache?

Thanks.


问:
Transfer pictures via adb, while preserving the ability to pick a better shot later
When I view a picture on my Pixel6, the phone suggests a "Top Shot" and lets me "pick a better shot".

I would like to transfer my pictures to a hard drive using adb, while retaining that ability.

I don't use Google Photos. Phone not rooted.

Is that possible?

If needed I can modify any Camera app's setting, or pre-process the pictures before using adb using any app, or post-process them afterwards using any software.


问:
What is causing Android device to turn its screen on at seemingly random times?
A friend has an LG phone running Android 6.0 (Marshmallow).  Many, many times during each day (and night) the device's screen apparently turns itself on.  This is causing much battery drain, and reportedly, a bit of annoyance.

There are no incoming calls or SMS messages at these times.  There are also no new notifications from Android or any installed apps when this occurs.

All apps on the device were installed from the Google Play Store or from F-Droid.  The only exception is the licensed version of AdGuard, which was purchased and downloaded directly from AdGuard.

Scanning for malware using several different well-known scanners reportedly came up with nothing.

The device is not rooted.

The device is stationary on a flat surface when this is noticed.  It reportedly happens regardless of whether or not the device is plugged in to a USB cable for power.

A new battery was installed, but that did not result in any changes (except longer battery life).

What could be causing this, and how to fix it?


问:
backend components for SMS on Oxygen
I took off all google apps and oxygen telemetry using root, but apparently I also took off something important.

I'm now receiving all SMS about half an hour late and I can't send any. This problem persists even if I manually open the app.

I changed the default SMS app to Signal, so I tried to revert to the original 'messages' app by google, but that crashes on launch.

I'm at a loss finding out what essential component I must have removed. Can anyone help out?

Title: backend components for SMS on Oxygen


问:
VNC over USB tether?
Edit:  I want to connect to a vnc server on  a PC from an Android client via usb tethering.

I'm trying to use my phone as a way of interacting with a headless linux box.  I can't get VNC or connectbot to work with usb tethering - they just time out.  Work as expected when I connect the phone through wifi.  Is there something I need to do to make this work? Open some ports or something?  I could get primitive ftp working through a USB tether.

Anyway I'm in need of suggestions of where to start looking - or if it is at all possible.

Wifi and bluetooth don't suit my use-case

Cheers

Title: VNC over USB tether?


问:
Accessibility for Gesture Controls gets disabled at least daily
I read through and tested all the solutions here but to no avail : Accessibility services gets disabled automatically

On Xiaomi 12S Ultra with latest MIUI. disabled all optimizations, battery saver etc but it somehow turns off my accessibility without me doing it (or it will just state - not working. Tap for info.) and there's no further info from the system.

What else can I do? It's not app specific as it also happens on FNG and Vivid Navigation gestures.


问:
Photo's filename weird numbers
I have an android phone. When I tried to connected it to my PC and opened image folder (DCIM/101SHARP), I have found many photos.
There is a photo with the name ".trashed-1666704779-DSC_0328.JPG".
At first I thought "1666704779" is unix timestamp, but it doesn't seem so, because when I converted it into a date, it was a date in the future.
Can someone tell what "1666704779" stands for, if it actually has any meanings. Thanks!</p>

Title: Photo's filename weird numbers


问:
Where's Whatsapp identity (private) key located?
According to the end-end-end encrypted messaging protocol named Signal Protocol and implemented also in Whatsapp, each user has a long-term identity key pair, in addition to some one-time ephemeral keys and a signed prekey.

The identity key, namely the one mentioned in the official documentation in page 4, is used in the first triple Diffie-Hellman agreement and signs all the prekeys.

Does anybody know where this key pair is saved?

I'm assuming here a full access to the memory of the device.
In the axolotl.db file I can find traces of current ratcheting keys but not of the identity key.


问:
Why am I not able to install the Signal app onto my Samsung Galaxy Tab S7 FE 5G?
I have a Samsung Galaxy Tab S7 FE 5G and the Signal app is seemingly unavailable for this device.

I didn't have ANY issues with Telegram, so it's quite baffling to me.

Does anyone know why? Do I need to download it from another source altogether?


问:
How can I prevent Microsoft Teams from muting my alarms?
If I'm in a Microsoft teams meetings, my alarms are muted (the alarm shows up on the screen but the sound is barely audible). How can I prevent Microsoft Teams from muting my alarms?

I  use MS Teams on Android 10 with Samsung Galaxy S9.


问:
unable to view documents pictures and videos after migrating data from internal to external
I use a NOKIA 7.2

I faced less storage on my internal storage

I "migrated" my data from internal to memory stick

Now I am unable to view any of my "documents, pictures and videos, I am able to see their presence in the gallery but am unable to open and view them

On opening the memory stick it shows 0mb of pictures but, when I open the pictures folder I'm able to see that all the pictures are there but am unable to open them ' could not open' prompt.

On trying to backup my pictures to my google drive, my storage shows full but none of the pictures are visible.

on trying to connect to the computer, I'm only able to see the external storage and not the internal storage folder.

On connecting to the computer the external storage shows the presence of the pictures but takes forever to load and the videos prompt 'cant play video'

On taking any new pictures I am able to view them only for a hours after which I am unable to view them

On receiving any pictures via social apps, I am only able to view them once after which if the picture is closed and reopened the pictures are blurred
Would be really grateful for any suggestions, advices or solutions.
Thank you


问:
Ghost files on sd card
About the first problem: so, once out of nowhere the files on my old sd card got corrupted. I decided to pull in and out tge sd card, without safely ejecting it first, which corrupted it completely. So I got a new sd card, and every time I prepare it for usage,android asks me to move 1.47 GB of files to free up space. If I do, 1.47 GB gets magically added to the amount of occupied space on my SD card to the "apps" category, however no apps are visible themselves. I've reformatted the card several times, changed it from internal storage to portable and back, the ghost files are still there. My guess is that the apps that were previously on my sd card themselves got erased, but the system saved their weight and the directories they were in.

There's another problem, with google play. Basically it completely ignores the existence of my sd card, even though it's formatted as internal storage.

I'd greatly appreciate any solution to atleast one of the problems I've mentioned, because I'm completely lost, even after days of trying to find solutions. Also I think I should note that it's impossible for me to get a card reader for my pc in the nearest future.

Title: Ghost files on sd card


问:
Does 4G Calling use up my mobile data plan?
I searched multiple times, but I only stumble upon "informative" articles about how to use 4G Calling.

But my burning question is whether it cuts into my data plan - because if it does not, would there be any reason to disable it?
The only issue I observed was that on loss of 4G connection (or Wifi, for wifi calling) the call can be interrupted, is that correct?


问:
How to tell Android Auto not to use several rows of pixels at the bottom of the screen (physical frame/bezel is smaller than the screen behind it)
I got an after-market Android Auto infotainment. The issue is its physical frame covers several rows of pixels at the bottom of the screen.

Is there a way I can override the device screen dimensions in some config file somewhere so the system does not know about the 10-20 rows of pixels at the bottom? (So I don't have to cut the plastic bezel, which will surely turn out horrible.)

"Hey Android, I know you think the screen size is 2000x1000, but it is actually only 2000x990."

OwnerDisplayName: Jaroslav Záruba


问:
How can I hover over some text on a webpage in Opera for Android?
On this Timeline on Patents.SE, for example, hovering over the S shows it stands for "simultaneous dates" (see image below).

This works on Chrome desktop, but not on Opera mobile.


问:
Can I transfer purchased apps+license info between devices via adb?
I've some desk phones that are basically a 7-ish-inch tablet with a handset hanging next to it. Since nobody uses the phone anymore, the only thing they've served for these days was as control surfaces for the place. For that I use a kiosked browser or the an app that connects to my automation controller.

The problem is is that these things have grown ancient and no longer have their certificate stores current enough to connect to anything encrypted. Among those things; the Play Store and even the local servers but the app is compatible, I know that because it was already installed in one of them that was factory restored by mistake.

Trying to revive an Android TV box recently, I learned how to push apps through adb wirelessly, I already connected to the reset phone and it doesn't seems like a big deal sideloading the app, the problem is the license information. Using this awesome file manager app, FX, that shows a lot of metadata about just about anything, I saw that the app requested under "UNGROUPED PERMISSIONS" (no idea) two that caught my attention: Google Play billing service and Play Install Referrer API. This sort of worries me because I bought this netdiag utility app a while back, that for it to remain licensed, I had to be signed up to Google's services which was beyond infuriating, I have a feeling there might be some of that in this app too. On the other hand, the other devices that weren't reset still have the app working and they were logged off, their certificates are old as well, and on top of that the phones are on a network without Internet access. This gives me a little hope. :)

Any suggestion?


问:
restarting Phone and touch not working
The phone is behaving as if the power button is pressed forever (confirmed this by removing the power button - volume button strip), also the touch stopped working before this issue happened..(the os is booting after i remove the power button strip) is there any co-relation between both the issues ?? I gave the phone to a repair guy after it was water damaged.

my phone is redmi 6 pro (sakura)

thanks

Title: restarting Phone and touch not working


问:
No microphone (one way, out) when first initiating a call with someone (Redmi Note 9S)
I've been experiencing strange behaviour when making calls with my Redmi Note 9S. Whenever I try to call someone or pickup a call from someone, if it's the first time I've called them in an unknown amount of time (maybe a few hours or so), they aren't able to hear me. I have to end the call, and then redial for them to be able to hear me.

I can hear them without issue, and the problem persists regardless of whether I'm using the built-in mic or headphone speakers.

I'm on MIUI Global 12.5.6 with a prompt to update to MIUI 13, but this update seems to be broken as it fails whether it downloads the update itself or I download it manually and pass the update file into the update manager. It fails for seemingly inconsistent reasons, where either the download fails or it can't install the update. Maybe this could be the problem?


问:
find out what app/package uses sensor
on my device running AOSP something accesses a sensor of my phone continuously, preventing it from going into deep sleep and thus draining battery.

Logcat shows the pid, but that just links to android.hardware.sensors@2.1-service.multihal.odin (using adb and ps -p PID)

an entry in logcat looks like this:

```<code>10-10 21:33:18.615   869   954 I android.hardware.sensors@2.1-service.multihal.odin: MIUS:isWakeUpSensor()
10-10 21:33:18.617   869   954 I android.hardware.sensors@2.1-service.multihal.odin: MIUS:run() after post event here
10-10 21:33:18.817   869   954 I android.hardware.sensors@2.1-service.multihal.odin: MIUS:run() before post event here
10-10 21:33:18.817   869   954 I android.hardware.sensors@2.1-service.multihal.odin: MIUS:readEvents() enter
10-10 21:33:18.817   869   954 I android.hardware.sensors@2.1-service.multihal.odin: MIUS: before polling
10-10 21:33:19.068   869   954 I android.hardware.sensors@2.1-service.multihal.odin: MIUS: poll result timeout, continue for next
10-10 21:33:19.068   869   954 I android.hardware.sensors@2.1-service.multihal.odin: MIUS:readEvents() exit
</code>```

Is there any way to find out what actually calls the sensor?
Thanks in advance!

Title: find out what app/package uses sensor


问:
App ill installed
I have attempted to install an app from its apk file, but I failed. It was a game created with RENPY, turns out apps over ~2GB cannot be installed and the app I wanted to install was a bit more. At the time I thought nothing of it, simply something that happens.

Now however I noticed that my device has ~2GB of storage occupied that before were free... only, I cannot "see" them. My assumption is that the apk was installed, Android then checked it, found it couldn't work, sent the error message and then left the installed app. Said app doesn't appear in the list of all apps installed.

How do I remove it and free my storage space?

Title: App ill installed


问:
How to export data from clouded stepcounter app
I am trying to get to the data recorded by a step counter app from Leap Fitness Group:

https://play.google.com/store/apps/details?id=pedometer.steptracker.calorieburner.stepcounter

I have had this app for a rather long time and I'd like to acquire the data that it has been recording to analyze and visualize it with data analytics software myself. I don't know which file I need to export from the app folder, as all the files seem to have some day in 1981 as their last edit date. The app also syncs to my google (drive?) account, but I can't find the files in my Google Drive. I have searched the internetz for solutions, but my searches have returned zilch, and I don't know how to monitor an app on Android to see where it's writing to and in what format.

If you have ever tried to export your data from an app by Leap Fitness Group, I invite you to share your experiences.

OwnerDisplayName: thymaro


问:
Can't connect the laptop to TV using wireless display (Chromecast works fine though)
I got a new TV with Google TV and Android 11.

I am able to cast tabs in Chrome to it from my PC. But when I try to connect to the TV using the wireless display feature , it
doesn't show anything.

What should I do?


问:
Can't see soundbar volume level on my TV
I have a Sony HT-S20R sound system. It's connected to my TV using HDMI ARC. My TV is the latest (QLED with support for HDMI ARC and Google TV as OS).

But when I increase the volume using the TV remote, it changes the volume but doesn't show the current volume level which is very annoying.

Any solution for it? Both support S/PDIF Optical. Is it better and can solve the problem?


问:
Do receipt apps like receipt hog automatically sync your online receipts in the background when Wi-fi is on, or do you need to open the app?
Even with background activity enabled, do these apps usually need to be opened to sync online receipts, or is it possible for the apps to do so in the background?</p>


问:
Trojan downloaded
Not sure this is the best place to ask but I'll give it a shot...

My son clicked a link in a spam message on my phone which downloaded
Android/trojan.downloader.agent

Instantly kaspersky and malwarebytes spotted the trojan and quarantined

My question is...
Should this mean that the virus has been adequately dealt with or is there a chance that it may still remain on the system?

Title: Trojan downloaded


问:
Do Samsung finger scanners constantly use battery if you keep your finger on the sensor without needing to scan anything?
I'm using the Samsung A32 5G.

It has a finger sensor that allows the phone to be unlocked, I'm wondering if the phone is on and you constantly keep your finger on that sensor, will it continue to try to pick up a fingerprint and use up battery, or will it only use battery when it is actively asking for a fingerprint to be scanned?

Do you not have to worry about leaving your fingerprint randomly on the sensor which could waste battery?


问:
How do I boot an Android S8 that is out of memory
I have an Android S8 that is out of memory and will not start completely.

I've already switched over to a new phone for daily use.

It will start and boot to the main screen for under a minute, then goes into a boot loop.

There are text message threads that I need for business and legal reasons, and I need them exactly as they are.  When I synced (inexact term) my new S21, I only got the receiver side of the messages, my side was not restored.


问:
Pixel 6 can't connect to n48 (5g SA)
TL;DR
I have a Google Pixel 6 and I am able to see my private PLMN but attempting to connect will show instant text, "couldn't connect". No logs in my 5g core, and no registration attempt.

Issue

GSM Arena shows that Pixel 6 can do n48

I've verified that the Pixel 6 can decode SIB1 in n48 and see the test network name "Open5GCore"

Attempt to connect provides no logs in the core using the following
radio imp files (Android still using version 12.1)

12.1.0 (SQ3A.220705.003.A3, Jul 2022, Verizon, Verizon MVNOs)

12.1.0 (SQ3A.220705.004, Jul 2022)

13.0.0 (TP1A.220905.004, Sep 2022)

I'm starting to think that the phone has a carrier block at the software level that I don't have the knowledge to verify.
In the US, there aren't any carriers who use n48, maybe some flag hasn't been set true yet via OTA images?
FCC branded it for private use, maybe Google intentionally blocks the capability?

I'm writing this late so I'll upload my logcat in the morning.

Title: Pixel 6 can't connect to n48 (5g SA)


问:
Cannot stop hotspot from loading which prevents wifi from auto loading
I have an Android head unit, which has hot spot details inserted, which I can't delete or remove with factory reset. I want to have my wifi to auto load on boot, but the hot spot prevents this from happening.
What can I do to disable the hot spot permanently or have it turn off after it starts and auto start my head units wifi.
It's a Chinese HU, Android 10

Thanks


问:
Route mobile hotspot traffic through VPN on a rooted device
I'm running an unlocked and rooted Samsung Galaxy Note 20 Ultra 5G (SM-N986U1) with an Android 12 custom ROM on the most recent security patch. The goal is that any devices that connect to my mobile hotspot have access to machines on my home network. I mainly would like to do this in order to use the Air Link feature of Oculus remotely without forwarding a different port each time I connect - I tried side-loading WireGuard on my Quest Two, when I connect it just locks the whole OS up, so that's not an option.

The local IP range of devices connected via hotspot is 192.168.36.0/24. I guess the hotspot interface is called swlan

I tried

```<code>iptables -t filter -F FORWARD
iptables -t nat -F POSTROUTING
iptables -t filter -I FORWARD -j ACCEPT
iptables -t nat -I POSTROUTING -j MASQUERADE
ip rule add from 192.168.36.0/24 lookup 61
ip route add default dev tun0 scope link table 61
ip route add 192.168.36.0/24 dev swlan0 scope link table 61
ip route add broadcast 255.255.255.255
</code>```

But it returns

```<code>/vpnroute.sh                                          <
RTNETLINK answers: File exists
RTNETLINK answers: File exists
RTNETLINK answers: No such device
</code>```

When both tun0 and swlan0 are active - so I'm not sure what it means "no such device".

I do have root access but I am not at all familiar with routing traffic on Linux/Android or iptables or anything of that nature so I am in need of help. If someone could hook me up with some commands I can just paste into an adb shell to accomplish this that would be much appreciated.


问:
Settings keeps showing notifications
Everytime I click my settings on my home screen it keeps showing this:

On-body detection

Keep your device unlocked while it's on you

M

Add another email account Set up your personal or work email

How do I turn this off. I have tried everything.

Title: Settings keeps showing notifications


问:
How to switch to "work profile" on phone running Android 10
How to switch to Work Profile on Samsung Galaxy Note 9 running Android 10?
All the guides I find online are related to tablets and/or they point to menus that are not available on the official Android 10 running on my phone.</p>


问:
Cannot delete some custom user certificates on Android 10
I have added user certificates, but Android do not let me delete most of them.

How did I add the certificates:

Open the setting drop down menu

Go to Biometrics and Security -> Other Security settings -> Install from Device Storage

Enter the pin

Type a name for the certificate

Choose if it is used for VPN and apps or Wi-Fi

1- If I add it as a Wi-Fi cert, then I can see it in the list from the User certificates menu, but it is not present in the list from View Security certificates. This kind of certificate do not let me delete the certificate later.

2- If I add it as a VPN and apps cert, then I see it both in the list from the User certificates menu, and also in the list from the menu View security certificates, at the tab USER. Only from this tab I can delete the certificate. I cannot delete from the menu User certificates.

In both scenarios the CA certificate has no effect. The certificate has been tested in other different machines, working fine, and it has the flag CA=TRUE.

Then, my questions are:

a- How to delete the VPN and apps certificates I've ended up adding many duplicates

b- How to get the CA certificate to properly work? I am testing it with Firefox, Firefox Focus, and Chrome.

Android version 10, running on Samsung Galaxy note 9.


问:
Does having more widgets/things on screen when the screen is off or on use up more battery than if there was less?
Let's say you had a timer widget that was counting down time. If you turn off the screen, would the widget be taking up more battery than if it wasn't on screen and was just in the background counting down time?

Generally, does having things going on in the main screen with either the screen on or off use up more battery, or does it not make a difference?


问:
movetoios: whatsapp deleted all other files?
I have recently bought a second-hand iphone. Coming from a Samsung Galaxy A6, I wanted to transfer my whatsapp database to my new phone. After some attempts, I finally succeeded and transferred everything except movies. I assumed that these files would still be on my A6 but when I looked in the whatsapp media directory, I could not find what I was looking for.

I do not know how the program works or if this question should be in the apple exchange site but I hope to find out what happens when you use the MovetoiOS tool with the files you did not select for transfer and where I should be able to find these files. Obviously, just running whatsapp on old A6 won't work as whatsapp is now configured on my iphone.


问:
hide profile picture for google voice messages
I have migrated my primary phone number to a google voice number. It caused some surprise to see my profile picture appear next to my message on someone else's phone. This number is used in a wide array of contexts and would like it to be as anonymous as possible. Is there a way to uncouple google voice VoIP activity from google profile information?</p>


问:
Mock location that is find from the app
I usually used a Fake GPS APP in order to smart-work from different location and not only from my home.

Now the APP that I use in order to login to my work, I don't know how,
but it understand that I use a Fake GPS APP, so I can't use it anymore.
Is there possibility to solve this problem please ?

Thanks all in advance
Denis

Title: Mock location that is find from the app


问:
Samsung A42 5g, when i try to open an APK file it says i need to sign in to save file, where do i sign in?
I am trying to download an APK file, when I try to open it I get a message at the end to say I need to sign in before I can save the file, where do I sign in?</p>


问:
Fastboot vs. Adb sideload vs. Custom Recovery?
I have a device that is an A/B device. I want to flash a custom rom I built from scratch. It's been a while for me and Android has changed a lot.

Xda says to always use a custom recovery like TWRP.

Google says to use fastboot flashall

Some other sites say you can do adb sideload in the normal recovery

What is the difference between all these?


问:
com.sec.android.app.camerasaver is using the camera in the background on Android 12

Samsung phone

Android 12

One UI core 4.1

Whenever I reboot my phone, the camera indicator shows up in the status bar, there’s no camera-related app open in the foreground and I have not enabled background permission to any app (except for system apps which have the option greyed out)

When I tap the camera indicator, it shows me that com.sec.android.app.camerasaver is using the camera. It happens for an instant. Camera permission for this app is “only while using the app”.

What is this package and is this a security issue?

OwnerDisplayName: raptorAcrylyc


问:
Stuck on Boot Screen - LightningFastRom - LineageOS - 17.1
I recently installed LightningFastRom 17.1, a ROM based off LineageOS 17.1, for my Galaxy Tab E 9.6 (SM-T560NU-gtelwifiue). For GApps, I used OpenGApps (arm, 10.0, micro). I modified the .zip file using this video. When I first booted it, it worked perfectly, then I flashed SuperSU. I waited an entire day and it still didn't boot. Does anyone know how to get back to recovery while on the boot screen, I decided to flash a new ROM.


问:
Avatar on YouTube Vanced is not clickable
I am using YouTube Vanced (not because of removed ads, but because of old UI, and also it does not force you to update, I could use the original YouTube, but because of last I don't) version 15.05.54. The problem is that on my Android tablet (Android 6.0), the avatars in comments are clickable and I can go to someone's channel, but using exactly the same on my Android phone (Xiaomi Redmi 7A, Android 10) I can't.

What's the problem? I remember, that earlier it was working, but now it doesn't. Maybe my Android version is too high?


问:
How to recover data on a phone stuck in boot?
I know it is a common question.
But I have been browsing the internet for the past 2 days and I can't find the answer to my specific case.

So, I have a Redmi Note 5 pro Indian model. But for the past 2 days, It has been stuck on booting up.

I can enter Fastboot( Vol down+Power button), But I can't enter Recovery mode.
The phone is stuck on Mi logo. Even when I enter the Fastboot, It is stuck on the Fastboot logo.

I have tried all the key combos.I have also let the phone discharge completely (The screen turns off and notification light blinks) and charge a bit before trying to boot it up. I also have ADB in my laptop. I have USB DEBUGGING ENABLED on the phone, But bootloader is locked(Never played with flashing and all).

I tried connecting the phone to the laptop too, But ADB doesn't recognize the device. I believe for the device to be recognized, It has to boot up atleast?

Anyway, I really want to recover my data from the internal storage of the phone. Is there anyway I can do this? Please help.


问:
How to transfer whatsapp messages from old mobile to new mobile without using google drive?
I already brought new mobile but I need to transfer whatsapp messages from old mobile to
this mobile. I already searched some tutorials but almost all videos are showing
using google drive like this:

https://www.youtube.com/watch?v=W4ths__PU68

I don't want to use google driver anywhere between this transfer process so that's make my question different from this question.

What I done:

I already created whatsapp backup file from old phone.


问:
Change default print settings
I'm printing from my Samsung Galaxy Note10+ to a Xerox VersaLink C405 and the default print settings are not what I want:

(Ignore the number of pages; this is just to serve as an example.)

I want to use Letter paper and double-sided printing as default. But changes to the settings here are not retained for future jobs. I could not find anything in the system settings or the "More options" dialog that would let me set the defaults. I can otherwise print without issues.

The phone is running One UI 4.1 (Android 12) and has the Xerox print service plugin installed. Is there some way to change the default print settings?

Title: Change default print settings


问:
Android 13 on a Pixel 3
I currently own a Pixel 3 (or 3a?) and Google recently launched Android 13 which dropped support for devices older than the Pixel 4. I was wondering if this is Google wanting you to buy a new phone or Android 13 actually not being able to run.

AKA: If I downloaded AOSP from the Android website, would I be able to build it for a Pixel 3? If so, would I be able to flash it on to my phone, or would it not work/crash/brick my phone/refuse to install?

Thanks in advance!

Title: Android 13 on a Pixel 3


问:
Endless loop after account password change
I recently changed my Google account password, logging myself out of my Android tablet. It shows an alert of "account action required". Tapping the alert brings me to a page with "Verify that it's you. You were signed out of your Google Account. Sign in again to continue.". Tapping next brings me to the password prompt, but before I have the chance to input my password (even pasting from clipboard) the input loses focus and a loading spinner appears for a few seconds and I'm redirected to the "Verify that it's you" page.

I couldn't remove the account, probably because it's the only account on the device.

What can I do to get my account signed in again?


问:
How can I find and remove forbidden characters in a filename?
In Windows, I often use copying a piece of text into notepad as a way of removing special characters that can cause trouble. This became a much more urgent problem in Android six months or so ago, when Android started rejecting any effort to rename a file that contained one or more forbidden printing or non-printing characters such as a colon or a carriage return. This change was not accompanied by any change to indicate what or where the problem character is.

Since I often try to rename PDF files with the real name of the document, copied from within the document, this has been a huge inconvenience. Is there any android text editing spp that removes or renders visible illegal characters as notepad does? Or has anyone found a good solution to this problem?


问:
Fingerprint will not open
My passwords are kept in passwords.google.com. When I am on my Samsung 52 and I need one of my passwords, and I go to Google Password Manager to get it, Android asks me to "verify it's [me]." I understand that I need to get past "use [my] screen lock" so Google knows it's me. I want to use my fingerprint to authenticate, but when I click on the "Continue" button, it says "Screenlock didn't work." I can click on the "Try Again" button, but screen lock doesn't work again, and I get caught in an endless loop of being denied. (There is login with password option, but my password is long and very random and very slow and tedious to type.) This is very frustrating and keeps me from getting my passwords stored by Google on my Google phone. What is the solution/fix for this?</p>

Title: Fingerprint will not open


问:
Why would 5G be significantly slower than 4G?
I have a 5g enabled Pixel 4a phone and am using it in an area with excellent T-mobile 5G coverage. For some reason when network preferences are set to 5g, the data rate is a small fraction of the speed that can be achieved when 4g is used in the same location at the same time. Could this be caused by a device defect or is there some other explanation?</p>


问:
How to pull non-debuggable app user data on a non-rooted device (with a broken screen!)
I recently broke my Pixel 3a's screen and I've bought a replacement. Almost everything's ported over, except for some key app data that I want if at all possible. The Google backup didn't work, ADB backup creates 0 byte files.

I have access to the phone via USB Debugging. It's running Android 12. I think I'll need to root it, but while accounting for 1. the broken screen meaning I can only tell what I'm doing while USB debugging's working; and 2. that I don't want to trigger a factory reset during the root process.

Any thoughts? Thank you guys in advance!


问:
redirect audio output to audio input
Is there a way to redirect audio output (sound coming out of the speakers) to audio input (like I'm speaking to the phone's microphone)?

Either by using an app or programmatically.

Title: redirect audio output to audio input


问:
Error Installing Zip AND unzip error?

Hardware details:

poco x3 NFC

Issue:

I'm trying to install some external modules.  Getting errors from Magisk and TWRP.

I've verified the integrity of the modules after having re-downloaded them: looked at them on a PC and everything is intact and as-expected.  But when I try to install via TWRP, I get the error seen in the image below: "error installing zip".

So, am I missing a step to installing a magisk module?  Should I reinstall my OS and install the modules simultaneously?  Somehow, I would like to get a lot of Magisk modules onto my phone.

I get the error above in TWRP.

"unzip error" from Magisck.

Title: Error Installing Zip AND unzip error?


问:
SELinux denials after migrating application data between devices
I'm trying to migrate application data between devices. The application was installed to the work profile using Shelter The steps I did were:

On source phone, tar cvf appdata.tar.gz /data/user/10/com.appname

Copy the tarball from the source phone to the target phone

On the target phone, install the applications to the work profile. Note the username of the /data/user/10/com.appname on the target phone, which is of the form u10_aXXX

On the target phone, chown -R u10_aXXX:u10_aXXX /data/user/10/com.appname

When I'm trying to use the app, it receives a lot of SELinux AVC denials and ends up crashing because it's unable to open /data/user/10/com.appname/databases/database.db:

```<code>10-18 16:23:28.485  4120  4120 W SharedPreferenc: type=1400 audit(0.0:889): avc: denied { search } for name="shared_prefs" dev="dm-0" ino=860652 scontext=u:r:untrusted_app:s0:c522,c768 tcontext=u:object_r:app_data_file:s0 tclass=dir permissive=0
</code>```

What am I missing? Application works after setting SELinux to permissive.


问:
How to automatically block camera access after closing camera
Ever since Android added the camera and mic access shortcuts and the quick access menu, I've often found myself forgetting to click the 'block camera access' shortcut after I'm done taking a picture or video. How might one set this feature so that it blocks access immediately after closing the camera app, or after a certain period of inactivity?</p>


问:
Skype Lite on Android: The Never-Disappearing Notifications Problem
I am having a problem with my Skype Lite notifications on Android 11 and would like to know if this is a common problem with Skype Lite on Xiaomi phones.

The notifications on the phone don't disappear even after I tap and go inside the app, and even when I have replied to the messages.

Is there a way to solve this problem? Thank you!


问:
How can you change the plug state of an HDMI port without plugging in a cable?
I want to change the state of HDMI to hw.plugged in software without actually plugging in a cable. It’s Android 2.3.2. I’m working on a kernel for a device and I want to see if HDMI broadcast is working, the plug state doesn’t seem to be working. So I want to spoof the plug state to bypass that issue.


问:
Text messages didn't deliver but show as sent on Messages but not in Messages+
I had two text messages not get delivered to someone even though they show as sent in the Samsung Messages app (on Galaxy S21).  I went to the Verizon Messages+ app and they don't show there at all.  What might have caused this / is there some way to prevent or investigate it?</p>


问:
Default usb configuration is reset after tablet reboot
I'm working with Lenovo M10 table model number TB-X5605LC. Android version 9

From Developer options, I am setting up the default USB configuration to be USB tethering but after every time the tablet reboots, the default USB configuration is set back to No data transfer

How do I prevent this from happening?


问:
How to share android 4g internet connection by LAN?
I have IP camera and printer that is accessible via internet. They can be connected via wifi or LAN (both have this rj45 port). I wonder if it's possible to share my 4g android connection through LAN?

I have tried using the following setup

OTG (microusb to usb) - usb to LAN port - LAN cable

But it doesnt seem to work ("USB tethering" option remain disabled)

Any suggestion?

OwnerDisplayName: cyanide


问:
Downgrade from Android 11 to Android 10
I upgraded my phone to Android 11 but now I have a lot of problems with it. The screenshot isn't working, and my phone is slow (on Android 10, it booted in < 30 seconds, but after the upgrade, it takes more than 2 minutes), sometimes when I open an app, it just shows a white screen and nothing is happening.

I want to switch back to Android 10 because I think it will be easier than fixing all these problems.

Is it possible? If it's possible, is there a way to downgrade through Android update or something like that, like when you want to update your OS, you just press download and install, and then it does everything automatically?

OwnerDisplayName: erthrzjžýu

Title: Downgrade from Android 11 to Android 10


问:
ADB/PM command to disable data and wifi access for Apps
Is there a way via adb shell to disable an apps access to WiFi and Data? I'd like to turn off internet for all apps and then selectively turn it on for required apps.

I know the manual way by going to App Info, that is not what I'm looking for. Nor for a firewall style third party app.  I'm specifically looking for a way I can script this.


问:
How to detect user have select GPS-provided time as their source of automatic time
I need to identify whether the device use GPS-provided time. I have went though documentation on Settings.Global. My question is how to get to know whether the user select network-provided time or GPS-provided time as their source of time. Can I differentiate the two sources from AUTO_TIME parameter?

Sample code below will return true if user choose network-provided time.

```<code>(Settings.Global.getInt(this.applicationContext.getContentResolver(), Settings.Global.AUTO_TIME, 0) == 1)
</code>```


问:
How do I uninstall toybox (a busybox alternative)?
In my /system/bin/ I have a executable named toybox, and various other directory entries in that directory symlinked to the toybox, eg basename and [.

How do I uninstall toybox?

Context: I believe it's messing with advanced root detection of Citi banking (my Revolut app is working just fine with Magisk's SafetyNet Fix)


问:
Multiple users without resetting Android settings?
I got a new device and have the opportunity to start from scratch. For privacy reasons I want to adopt the multi-user paradigm in which I would isolate certain apps from other apps using the multiple user feature from Android. This way I can keep social media apps away from financial, etc.

Creating a new user shew me that I literally have to start from scratch on the new profile. All my previous settings are gone. I really wish non-sensible things like display settings or quick buttons above the notifications would be transferred over. Honestly, everything from the settings, but Wifi, Bluetooth and account settings.

I don't care how (template profile, copying setting data?), I don't care if I have to fire up the adb shell for that, is there any way to take the pain from creating a new user account profile?

I'd like to be able to quickly get a comfortable new user profile to install new stuff into it without worrying too much. If setting up with a new profile involves many minutes (which it would right now), I would be too lazy and keep using a standard set of profiles which is less ideal for privacy reasons.


问:
Possible "moisture detected in the charging port" error on Samsung Galaxy S10+
A few weeks ago an error message popped up on my phone:

Warning: Do not use charging/USB port We've detected moisture or
foreign material in your charging/USB port.  Check your charging/USB
port for any foreign material such as dust and debris. To prevent
damage to your phone, don't plug anything until charging port is
clean, the moisture is gone, and the notification is cleared.

The issue is that the phone was laying on my desk when the notification first occurred. There was no water near the phone and it never got wet. I used a can of air to clear out any possible dust but there was none that I could see. I have tried to restart my phone but the notification has not cleared even after a reboot. I do not want to poke around in the charging port with a pair of needle nose tweezers.

The only way the phone will charge is wirelessly which is inconvenient, especially in the car. I believe that this is some type of bug in the script considering it popped up out of nowhere. I do not want to factory reset, is there a process that could clear this manually through the operating system?


问:
Stuck in recovery mode, power button broken
My Samsung galaxy j5 (2015) is stuck in recovery mode, If I pull and put back the battery it boots in recovery, if I let the battery run out and then charge again it still boots automatically in recovery mode.
No custom recovery, no custom rom, it is rooted, I can't remember if usb debugging was on.
On the bottom it says:

```<code>No Support SINGLE-SKU
Supported API: 3
dm-verity verification failed...
</code>```

One day I accidentally restarted it on recovery because the power button is broken and I use an app to turn it off, it has remained like this since, it was fine before.
I tried using adb but I don't know why my pc can't see the device.
I really don't want to lose my data.
Can someone help me?

(Btw, why when I press a button the selected option becomes green?)


问:
error when making a kernel My toolchain always says "no such file or directory"
So I am trying to make an old kernel on the newest Unbuntu. Set up build essentials libncurses5-dev bzip2 cant get kernel-package says its unavailable? Haven't found an alternate source. Ive gotten all the sources an set up Unbuntu im following this guide: https://forum.xda-developers.com/t/ultimate-guide-noob-friendly-compile-your-own-android-kernel-from-source.2871276/
When I export
export CROSS_COMPILE=~/android/kernel/arm-eabi-4.4.3/bin/arm-eabi-
No problem  when I can set up my defconfig I can do that and I can enter menuconfig, but when I go to compile I get

make: /home/c/android/kernel/arm-eabi-4.4.3/bin/arm-eabi-gcc: No such file or directory

/home/c/kernel/scripts/gcc-version.sh: line 25: /home/c/android/kernel/arm-eabi-4.4.3/bin/arm-eabi-gcc: No such file or directory

/home/c/kernel/scripts/gcc-version.sh: line 26: /home/c/android/kernel/arm-eabi-4.4.3/bin/arm-eabi-gcc: No such file or directory

Im using this kernel source https://github.com/DooMLoRD/Xperia-2011-Kernel-2.6.32.9/tree/master/kernel

Is there something I need to modify in the source to get it to find the toolchain? I've copy pasted the location of the toolchain when I export to make sure there is no error so that cant be the issue. Then I copy pasted the path from the error and ls and its definitely there. So I'm very confused.


问:
How to automate clearing Firefox (Fenix) browsing data?
On desktop this is considerably easy: enable the setting to "delete cookies and website data when closing Firefox" in about:preferences#privacy and (optionally) schedule a task to kill the browser process whenever desired. Firefox has a similar setting on Android, but one must always manually select 'quit' from the main menu (after enabling the said option):

I haven't been able to come up with a solution aside from automating touch input (no experience, and I'm already using cron in Termux... or fully clearing the app data with ADB (adb shell pm clear com.package.name). Wiping the user data directory in Termux may also be an option, but this requires root rights (last I tried, I apparently bungled up  permissions to some degree).


问:
Google play store automatically install apps after login to google account
Hello my problem is after login in my google account the google play store automatically install google apps like google assistant,google maps , etc and i don't know how to stop it even opening google play store they are not listed while installing</p>


问:
Google Pixel 7/7 Pro : Spontaneous Pictures \ Quick Shutter Mode Experience
I was curious to know about the shutter speed and how quickly one can jump into camera mode from lock screen/from-doing-something to capture those spontaneous moments.

Usually what I have noticed on android is that if some large\heavy app\many apps are open it tends to lag and slows you going into camera mode, and get the UI up and capture the picture, by that time that moment passes by.

Also do you know any lags started to creep in when quickly and frequently switching between camera modes (pic\video\portrait\etc) ?

Please share your experience on this for Google Pixel 7 and 7 Pro.

Please also share any YouTube reviews\articles where the experience of taking photos\videos is covered, not the end result

Note: Please share this based on a phone you have bought and have been using it as your daily use phone, don't want reviews of demo phones where usually nothing is loaded and its fairly Out-of-box phone.


问:
Decrypt data in recovery after bootloop
I’ve made a little mistake.

This year, I’ve installed LineageOS for MicroG on my Fairphone3. It provides OTA updates but with the last one, it is said I must follow the official instructions on LineageOS website. It was not a prioritiy, so I didn’t do it. At the begining of the month, I’ve open the web page and read the instructions. There are simple, so i’ve done it.

But, I’ve forgotten that my version was MicroG. I’ve installed the “normal” version (lineage-19.1-20220926). Now, my FP3 is in a bootloop . May be due to the absence of MicroG). I’ve tried to install a newer version of LineageOS for MicroG, without success.

My problems are :

I would like to retrieve data

Data directory is encrypted

I’ve locked my phone with a pattern

I’ve found a solution to try a decrypt with Santoku Linux. The script needs a header and a footer. I have found the header but not the footer.

Do you know where to find it ? It seems these files are different accordind to the manufacturer.

Title: Decrypt data in recovery after bootloop


问:
How to copy paste rich-text in Android 9?
I'm using Android 9 on Cherry Mobile Flare S8 Pro, and it seems I'm unable to paste rich text on an online rich text editor.

For example, I'm copying a header and bold text within rich text format then when I paste it in any Online Rich Text Editor, but it only pastes plain text without the header and bold formatting.

The problem is, this kind of workaround actually works in my Windows 10 laptop but not on my Android 9 smartphone.

I have tried downloading some copy-paste apps in playstore and using them to copy paste the formatted rich text but it doesn't work either and gives the same result.

Is there any way to deal with this without rooting my phone?


问:
MacOS - Unable to transfer files with Android File Transfer as 2 popups conflicts with each other
When I connect my phone to my Macbook, I see a popup saying I need to allow permissions on my phone (see screenshot).

So I click 'Allow' on my phone. Now the error popup still stays while the main window shows the content of my phone. But I am unable to click on the main window because the error popup is still open.

When I click OK on the error popup, both the error popup and the main window closes together and the error popup opens again with the 'Allow' confirmation on my phone. If I click 'Allow', it all repeats over.

See the GIF for what I'm talking about.

```<code>Model - Samsung Galaxy S10 Plus
Android version - 12
One UI version - 4.1
Mac OS version - 12.6
Android File Transfer - I think it's latest but can't find the version as the popup blocks me from checking the About menu.
</code>```

Is this a bug with the Android File Transfer? Is there an another free app that I can use to transfer files?


问:
Why can I access a local webserver on iphone, but not my Android phone?
I have an ESP32 Cam connected to my local wifi. As I understand it, the ESP32 Cam connects to the wifi and runs a webserver which serves up video controls and a video stream.

I can access this on my Linux PC, and my daughter's iphone, simply by typing http://192.168.1.132 into the web browser, but my Samsung Android phone does not let me see the device.

Strangely, the very first time I tried to access the ESP32 on my Android phone, I saw the camera image appear briefly.  Subsequently I get ERR_ADDRESS_UNREACHABLE.

Any idea what is going on, and how I can fix it ?


问:
Samsung Galaxy A13 developer mode breaks flashlight
I was using my Samsung Galaxy A13 phone like normal. I could take pictures, run apps, etc. I turned on developer mode on my Samsung A13 unlocked phone and I noticed that, while running my phone in developer mode, I could no longer use the flashlight. I turned off developer mode, tried to turn on the flashlight, and it still wouldn't turn on. I went to the retail outlet that sold me the phone and they could not get it working. I exchanged the phone for another one. I noticed that, at the end of the data transfer process, the flashlight on the original device started working!

My question is, what do I have to do to get my flashlight back? I tried a factory reset of the device and the flashlight still does not work. What other options are there? I tried doing a settings reset on all applications and that did not work.


问:
Getting ModemServiceMode with adb
On Samsung devices, how to get the ModemServiceMode page (*#0011#) with ADB commands?

Title: Getting ModemServiceMode with adb


问:
How to install an custom ROM for android car head unit?
I'm trying to install a custom rom on my Lenovo D1 head unit but since it doesn't have physical buttons i'm struggling to get my device in to recovery mode.

The reason I'm trying this is my device is very slow sometime so i thought i should try a lightweight ROM, no specific one yet but im gonna try multiple ones.

Anyone know how can i achieve this?
Thanks


问:
If an app has the permission "Draw over other apps", can the app see the content present on my screen?
So I recently installed an app called XSCamera which can basically record with the phone camera in the background. It requires the "Draw over other apps" permission to display a mini-preview of the viewfinder at the bottom of the screen. But can the app also see the content which is present on my screen with this permission? I have documents in my phone which have my passwords and other personal information. If I use this app and then open those documents, can the app see my passwords?</p>


问:
Can I use my BLU M8L+ Tablet to make calls using my sim minutes?
I currently have to use my 4g BLU M8L+tablet as my phone but am unable to use my minutes to make phone calls what hacks or apps can I use to call using mins? When I use WiFi or data to make calls it sounds horrible and also not easy to get verification codes I prefer using my minutes  Any ideas?</p>


问:
Required Img files for heimdall root
Folks, I'm trying to root a phone with Heimdall (on Linux).

Completed steps so far:

Downloaded Factory Firmware

patched it with Magisk

setup heimdall

downloaded PIT from phone

backed up phone with adb backup -apk -shared -all -f <filepath>/backup.ab

installed twrp recovery

So now I would go on and flash the patched images.
From the magisk patch and the firmware, i get those files:

```<code>boot.img
cache.img
cm.bin
hidden.img
modem.bin
param.bin
recovery.img
sboot.bin
system.img
userdata.img
</code>```

Comparing this with the contents of my PIT, I am missing these files:

```<code>md5.img
efs.img
cpefs.img
m9kefs1.bin
m9kefs2.bin
m9kefs3.bin
carrier.img
tombstones.img
dnt.ssw
steady.bin
modem_debug.bin
nad_refer.bin
</code>```

Some people only use recovery.img and cache.img, others use all of them, so now I'm confused. Hence my questions:

What is the minimum set of files required to flash in order to root the phone?

I.e. are the ones I have enough, respectively

are the missing ones required?

Thank you big time!

Title: Required Img files for heimdall root


问:
Restore chat history on WhatsApp - different number
I made the mistake of doing this in the following order:

Backing up my WhatsApp data

Changing number

Changing phone

Because the data is associated with my previous number (which I don't have a SIM for) - I can't restore it on my new phone. Can anyone help? Do you think the data can be restored to a different number on the same phone (and same account)? I know some people have suggested moving the CRYPT14 database...


问:
Any android devices on the market with a perfectly square display?
Are there any android based devices on the market with a perfectly square display? If not is there any particular reason why not and would it create any problems when switching between portrait and landscape modes?</p>


问:
How does one backup a Fire HD's entire system as is (like a PC "image", and after having been modded with Fire Toolbox) and restore it?
My parents play slot machine games, but they continually lose their play money and require me to factory reset their tablets to reset the default amount of money. Clearly, this takes a while to do every time.

I would like to factory reset, mod with Fire Toolbox, setup all their games/apps/settings and then create a backup image of this setup, which I can then restore much faster than having do it all that setup again every time.

Is there a method for this? Amazon's cloud feature is not an option.


问:
Google Play Store not starting after latest updates
I have a Blackview A55 phone with Android 11 and after the latest updates the store won't start.</p>


问:
Custom boot image
I have a smartphone (Xiaomi mido) with a corrupted eMMC, but it seems I can load a boot image into it and run it. I would like to experiment with low-level programming in Rust, such as the display and camera. I found the source code for mido, but I don't understand it at all. Tons of code I don't understand. Googling without success. So that the question can be answered objectively, you can answer that what I'm doing is impossible or stupid. Can I at least run Hello World on my smartphone hardware?

Title: Custom boot image


问:
Can I send start command to my android phone in linux using serial command
I can't use my phone's start button, it's non-functional and in shutdown state.similar problem but can't access battery
Can I send start command using Linux USB serial communication for this?

If it's probable, which port should I use to send that start command.

Here difference in my port list.

Connected
No Connection

bsg
------------------------

cdrom
------------------------

sr0
------------------------


问:
Full bridge mode to pass mobile data IP to USB tethered device?
I am using an old Samasung Galaxy S6 as an LTE modem, connected to a router (GL-MT1300) by USB tether. As is known, mobile data is NAT'ed on the phone and a local DHCP address is handed to the tethered device(s), resulting in double NAT on my network.

My question is, if I root the S7, is it possible to configure it as a full bridge, so that it simply passes the mobile data IP directly to the connected router? (I'm aware it will likely be a CG-NAT address and not a true public IP, this doesn't matter.)

I have seen a post regarding half-bridge mode/IP passthrough, with the assumption that the Android device still needs it's own internet connectivity, but that is not the case here. I don't need the S7 to have connectivity itself, I just want it to act like a full bridge and provide connectivity for the connected router. I would like it to work specifically over USB tether rather than wifi.


问:
Android not showing Whatsapp and Telegram suggestions for a contact
I have tried to search this I swear. on my S20, if you clicked on a contact it would suggest/show you if a contact has whatsapp or telegram. It was a shortcut even. my S22, it doesnt show anything but the number below the name and history. Contacts are synced via whatsapp, I believe it is some setting on my droid, not the other communication apps. any help is greatly appreciated. Thanks!</p>


问:
am start of Chrome: Activity class does not exist
I've downloaded Chrome 106.0.5249.79-524907934 from APKMirror and installed it (along with the corresponding Trichrome package) on a Pixel 5a via

```<code>$ unzip com.android.chrome_106.0.5249.79-524907934_8lang_11feat_..._apkmirror.com.apkm
$ adb install-multiple -r -d *.apk
</code>```

So far, so good.  However, when I try to start the app via

```<code>$ adb shell am start -n com.android.chrome/com.google.android.apps.chrome.Main -a android.intent.action.VIEW
</code>```

I get

```<code>Error type 3
Error: Activity class {com.android.chrome/com.google.android.apps.chrome.Main} does not exist.
</code>```

Running adb logcat at the same time shows

```<code>W PackageManager: Intent does not match component's intent filter: Intent { act=android.intent.action.VIEW flg=0x10000000 cmp=com.android.chrome/com.google.android.apps.chrome.Main }
W PackageManager: Access blocked: ComponentInfo{com.android.chrome/com.google.android.apps.chrome.Main}
</code>```


问:
Is the code that detects phantom button presses part of Android
On one of my Samsung Tablets this morning, after signing in, the device would go to the lock screen after a second or so.  If I was quick, I could then press and hold the power button (intending to restart it).  Again, it would go back to the lock screen.  Sometimes I would see the Power Off / Restart buttons, but I was not fast enough to press them.

When I Googled I found this

If you know the tablet is charged and it still won’t turn on, the standard method for resetting Samsung Tablets is to hold down the Power button and the Volume Down button until the boot cycle starts (about 10–15 seconds). Then release the buttons.

How Do You Reset Your Samsung Tablet If It Won’t Turn On?

Question - Is this amazing code that detects phantom button presses a feature of Android?  Or is it a Samsung artifact ?

EDIT

It does not appear to be hardware, here is another link from 2017 Complete Guide to Fix Samsung Tablet Problems.  There are many more, and only in one case was it the hardware (digitizer).


问:
Replacing a Galaxy S10 internal storage
I have an old Samsung Galaxy S10 that's completely smashed up. I've been trying to recover the data for some time now. The issue I'm having is when I charge it up and power it on, it sounds like it's just continuously boot looping which is stopping it from detecting any files on the device.

I'm kind of out of options on how to solve this issue.

Would it be possible to buy another S10 device and install the flash drive from my old device onto the new one? I've been searching on Google and struggling to find any answers.

Title: Replacing a Galaxy S10 internal storage


问:
Why does my phone report "network unavailable" every time I return home?
At home I have a router with several devices wired and over wifi. Everything works fine, including my Android LG cellphone, which connects to cell over wifi.  I'm in a rural area with no direct cell service, so it's wifi only for internet and calls.

When I go somewhere and come back, I can't receive phone calls or texts.  The web browser still works. The wifi settings shows the router, and puts on appearances of being okay.  But attempts to call out fail with "network unavailable".  By powering off and rebooting, everything goes back to normal.

If it's relevant: when I go out, it's mostly through areas with no service of any kind at all. (AM broadcast radio, barely.)  In town, I have regular cell and everything's fine.

My main question is: why?  What is a permanent fix?

Being absent-minded, I often forget to do the power cycle every time I return home. So a secondary question, if the first can't be answered, is if there's a way to automate the power cycle every time I'm out of range and return to within range of my home router? Or at least have a beep, popup or something to remind me?


问:
How can I scan participants' QR tickets to enter an event?
I am hosting an event where I would like to have all participants receive a secret key in the form of a SHA-hashed secret, converted to a QR code. This would represent their ticket to enter the event. I would then like to be able to use a large list of these secrets to verify the participant's ticket (QR code) and automatically mark that participant as present, to make sure no tickets are used multiple times.

Is there a way to use QR codes to verify if a certain value is in my list of keys, and then check off that particular key? Or is there another way I could use such a QR-based ticket system to verify a participant's ticket? Would I somehow need to write my own app to do that, or are there already existing systems I could use for this?

If I am posting this in the wrong place, please let me know where I should post it instead. I couldn't think of any better place than here.


问:
How to make in-game purchase items tab, appear directly on the play store page?
I came across this screenshot of in-game purchase items, being shown and buyable directly from the Playstore page of the game. But I can't seem to find this tab on my playstore.

Here is the same page but on my playstore.


问:
Open multiple instances of Drive PDF Viewer on Redmagic
Opening a new pdf file from redmagic's file explorer (or the google file explorer) replaces the old instance of the drive pdf viewer and the previous pdf file with the new pdf file, unlike Samsung phones where it allows both to be open at once.

A workaround I have found is to upload the pdf file to drive and open it from there, then I can open any number of pdf files simultaneously. Is there a fix for this or a better workaround?

I am using RedMagic 7 Pro.


问:
How can i see my devices external USB storage in android studio
I'm currently creating an application that aims to automatically move a file between the folder of a USB device and an internal folder.

I have the code that moves the files between two folders working on an emulator, however I cannot configure the code to work on a live machine as when I connect my device to Android Studio the Device File Explorer fails to display the USB device.

I have the USB device connected to my Android Device and my Android Device is connected to Android Studio over Wi-Fi. My primary concern is detecting my USB storage in Studio explorer, if this is not possible, any advice on transferring files to external USB devices is appreciated.

(I am aware that interaction with files on a USB device will void my app from ever getting on the app store, this is purely a non-commercial, internal app)


问:
How can I enable double tap actions on navigation buttons?
Before the latest Android update, I was so happy with my double tap functionalities. I had something like

double triangle -> bring down the panel with notification,

double circle -> lock screen

double square -> I had it set to something I rarely used and so I don't remember, but it was settable

hold triangle -> some thing swiping right on the first page of the home

hold circle -> google assistant

hold square -> split screen

All these things but the last 2 have disappeared with last update. I think before this update I was Android 11.

How can I enable those things again? I haven't found anything in the settings.


问:
"3rd party apps designed to use mobile data" even when connected to WiFi
I found something curious researching this topic:

3rd party apps designed to use mobile data

Some third-party apps, such as online banking apps, may still consume mobile data even when they are connected to a wireless network. This issue occurs on all Android phones and cannot be resolved by changing the settings on your phone.

Such apps usually do not consume much mobile data. If you are worried about data consumption, swipe down from the status bar to open the notification panel and tap the Mobile data icon to disable mobile data.

Source: Huawei (https://consumer.huawei.com/uk/support/content/en-gb00459970/)

I noticed this in the past, some specific apps seem to trigger the '4G' icon for brief seconds while connected to wifi, opening chrome and checking my IP always returns my WiFi IP while the icon is on, also I don't see any flaky WiFi connection.

Why is that? Is it something about location accuracy?


问:
What is "Service Provider Information" on Samsung devices?
What is the "Service provider information" that this Android 12 Samsung Galaxy phone gathers upon setup?

Setup requires connection to a network, then says it needs to gather this info, then restart.

The only service provider I have identified on the phone is Wi-Fi.


问:
Rolling back an APK install to a previous version
I have been using APKMirror update which helps me see if any app updates are available.
I had it connected to only check Google Play which worked great for a long time

My problem is that there was an update flagged for Samsung Internet and when I downloaded it, I realised that it had downloaded from Aptoide and it had installed a foreign version of the app. (I think it may be chinese but not 100% sure)

I uninstalled the app, and then downloaded the current version from Galaxy Store, which was a slightly older version that Aptoid provided

However, all it done was reinstall the Aptoid version. I tried using Google play and had the same issue.

I then went to APK Mirror and downloaded the version that is available from Google play and Galaxy store, so that I could install manually.

I get an error telling me App not installed as package appears to be invalid

But the reason for this appears to be found when I try and install using APK Mirror Installer

I get an error App Installation Failed, The new package has an older version code than the currently installed package

I have uninstalled the app but there appears to still be remnants of the app on the phone which is making it difficult to revert.

Are there any recommended steps to take to rectify this issue?


问:
Considering the licence, can I use ADB for other purposes than creating an Android application?
When I try to download Android SDK Platform-Tools (with ADB) from the official site (https://developer.android.com/studio/releases/platform-tools) it is required to accept the license that says (among others):

3.1 Subject to the terms of the License Agreement, Google grants you a limited, worldwide, royalty-free, non-assignable, non-exclusive, and non-sublicensable license to use the SDK solely to develop applications for compatible implementations of Android.

And to maybe add some context:

3.2 You may not use this SDK to develop applications for other platforms (including non-compatible implementations of Android) or to develop another SDK. You are of course free to develop applications for other platforms, including non-compatible implementations of Android, provided that this SDK is not used for that purpose.

The statement "solely to develop applications for compatible implementations of Android" makes me wonder if it's acceptable that I use ADB just to do something on my phone (installing an application, doing a backup or maybe even using Scrcpy) which is not really connected to creation of some new app.

How should I understand this paragraph? Or maybe it's not really about ADB (or other tools), but SDK itself (which I not really or not necessarily use while using ADB)?

I tried finding a way to directly contact Google about it, but they suggested using Stack Overflow (https://developers.google.com/sites/support). I decided to post this question here first, as I think it may be considered off-toppic there though.


问:
How to fix null imei and mac address?
I was messing around with the devinfo partition of my pixel 6 pro,but I made a backup before. As a result it was stuck in a bootloop, so I restored devinfo's backup using fastboot, all good so far, phone boots well and everything is normal, unless for wifi and bluetooth. they can't be turned on. mac address is "unavailable". IMEI as well is a bunch of zeros. I don't know what's wrong, I did not touch the efs partition at all. does anybody have any idea of what went wrong?</p>

Title: How to fix null imei and mac address?


问:
The Galaxy J7 Core screen is unavailable and locked when connecting to VPN
When connecting to any vpn and during use, the mobile phone will lock the screen against the user's will and the screen will turn off and on once every second until the mobile is reset and  Or if I don't turn it off, it won't come out of this state.

Additional Information :
Galaxy j7 core
Android version  : 9p
One ui version : 1.1


问:
What happens when Google decides an app is "bad"?
An Android 7 (Nougat) device that hadn't been used in a while (perhaps a few months) was recently turned on.  That device has Nova Launcher Pro installed.  It does not have external (microSD card) storage.

I noticed that one of the launcher's folders had a couple empty spots.  I don't recall deleting any apps, nor any icons from the launcher's folders.

I don't remember exactly which apps were in those folders.  I think one of the apps may have been a bubble level tool, but I'm not sure.

When Google Play Protect is disabled, I'm wondering if Google has the power (and legal authority, but that's a bigger question) to simply remove apps from Android devices if they deem those apps to be "bad".  By "bad", I simply mean they contain crash too often, contain malware, violate user's privacy expectations, violate Google's Terms & Conditions, or something along those lines.

Note that all apps on that device were installed from Google's Play Store or from F-Droid (via it's primary repository).  Google Play Protect was not enabled.  Although Google does have a bad history of enabling functions/permissions that the user explicitly disabled, Google Play Protect does show itself as disabled on that device.


问:
Access to raw GPS / GNSS measurements on WearOS 3.0+
My question is on Android Smartwatches and the WearOS. I understand WearOS 3.0+ is based on Android 11. Technically any device above Android 10 should support raw GNSS measurements, as stated in the Android developer documentation (https://developer.android.com/guide/topics/sensors/gnss). While this statement might sounds pretty straightforward, I was interested to know if anyone had experience with this or could verify if such measurement are accessible on a recent watch, before I buy one myself for development purposes.

Also, by raw GPS/GNSS measurements I mean pseudoranges, phases, etc...  as indicated in the link above. Latitude/longitude measurements are not sufficient for my purposes.

I have limited experience in Android development on Smartphones and no experience on Smartwatch, if there is better place where to ask this question please let me know.

Cheers.


问:
Unable to pair Samsung with Sony Headphone
I'm unable to pair my brand new Sony WF1000-XM4 with my Samsung Galaxy S8.

First, Sony's official Headphones app detects the headphone immediately, but fails to register with "Connection failed" error.

The Bluetooth method also fails because while my phone detects the headphone immediately, I get "Couldn't connect" error.

Resetting the headphone and restarting the phone have no use.

Assuming this is some kind of compatibility issue I checked the headphone's specifications and found that AVRCP is common with my phone, and my phone supports v1.4, v1.3, v1.5 and v1.6 and I tried all of them with no luck.

Please assist.


问:
In Settings > Apps, where can I find the app called "Recommended apps?
Where on Settings > Apps, can I find the app that identifies itself elsewhere as "Recommended apps"?

I get notifications from an app that Settings > Notifications IDs as "Recommended apps" but Settings > Apps shows no such app.


问:
How do I uninstall the "Recommended apps" app?
Normally I'd use an entry on Settings > Apps, but this app has no entry there under its own name.</p>


问:
Is there a way to switch to 5 ghz hotspot ap if there's no setting in the UI?
I'm using Android 12 crDroid 8.9 rooted on OnePlus 5. My phone has a broken 2.4 GHz wifi, it works very bad: disconnects, slow speed and low connectivity.

I want to switch my AP hotspot to 5 GHz, but there's no option in the UI.

Does anyone know if there is a way to force 5 GHz AP via adb or by changing some system files?


问:
How may I disable all disable-able notifications?
On Samsung Galaxy A13, Android 12.

The nearest I find is:

First, Settings > Notifications > Included apps > All apps (one slider) , but this is missing many notifiers such as Device Care (present on Settings > Apps) and Software Update, System UI, Call (absent from Settings > Apps).

Then, Settings > Notifications > Recently sent > More > All (dozens of individual sliders - for apps oddly missing from Included apps above). This shows entries missing from Settings > Apps e.g. Android Auto. Oddly it shows e.g. Calculator enabled despite that Settings > Apps shows Calculator enabled.


问:
How may I set all undisable notifications to "(*) Deliver quietly"?
On Samsung Galaxy A13, Android 12.

The nearest I find is to go through Settings > Notifications > Recently sent > Mode (the titled "App notifications" > All, inspect each of the 90-odd apps individually, and for each one with undisable-able notifications, set it manually.


问:
When re-installing DuckDuckGo browser, the bookmarks and favorites did not load. How do we get them back?
When re-installing the DuckDuckGo browser, the bookmarks and favorites did not load. How do we get them back? I have set DDG as the default browser.</p>


问:
Why is text messaging faster than internet?
I have a up to date Android OS Samsung A13. I would like to know why text messages go through virtually instantly but it takes longer to load a web page on the internet. Why does it take forever to load a website like StackExchange but text messages go through instantly?</p>


问:
"Mount" a loopback device from SD card without root
I'd like to move Termux/Nix-on-droid on my SD card as I lack space on internal storage. Unfortunately, SD cards are formatted in extFat so they can't deal with stuff that are common on ext4 systems, notably symlinks. I was thinking to use for that a .img file formatted in ext4 using mkfs, and mount it somewhere. But since my device is not rooted (and I don't want to root it for various reasons) I can't mount the file, even via adb:

```<code>/sdcard $ mount DCIM/virtualfs test_mount/
mount: bad /etc/fstab: No such file or directory
</code>```

Is there any trick I can do to do that? For instance using some fakechroot-like tools?


问:
Truncate a file inside Android filesystem
I have a large (1.3GB) binary file on internal/emulated storage of an Android device running KitKat (4.4.2, API 19); I want to truncate this file to a slightly smaller size (1.2GB), without copying/transferring it all over again.

Device is rooted, and I have adb + shell access.

On Linux I could have just run truncate --size=1.2G path/to/file; however the shell pre-installed on the device is BusyBox v1.21.0-jb bionic, which doesn't seem to contain a built-in truncate command. Based on BusyBox changelogs, truncate was only added in 1.24.0.

What are my options?

Device storage has only ~400MB left, so making a dd-style copy of required size (and then deleting the original) is not an option.

Could not find an alternative command that would behave in this way (remove trailing content from file / shrink it, in-place).

Tried copying and running the truncate binary from another device (Android 8.0); however it wasn't compatible (gave an error CANNOT LINK EXECUTABLE: empty/missing DT_HASH in "./truncate" (built with --hash-style=gnu?)) (FWIW in the end, found that the binary was actually a toybox multi-call binary). All other devices at my disposal don't seem to contain truncate command.

Tried to find a standalone truncate binary online - which I can install without touching the existing busybox installation - but could not find any pointers.. or at least any indication that such standalone binaries exist for Android at all

Tried few common file browsers (device built-in file explorer com.rhmsoft.fm, ES File Explorer) but could not find a suitable action/option.

I would prefer to avoid installing a complete app/apk for this purpose alone, but would go with it if that's the only option; anyways, I'm quite doubtful if such an option would be available in APK form at all.


问:
How do I open the app drawer from the home screen when the toolbar is activated?
In a Samsung Galaxy Tab S8, with the latest update, there's now a toolbar that you can turn on and off. With the toolbar off, you can swipe from the bottom of the screen to open the app drawer. With the toolbar on that swipe gesture no longer works. How do you open it? When an app is open, there's a 9 dot menu on the bottom left, but when you are in the home, there's no menu.</p>


问:
Android phone having micro SD card instead of soldered flash IC
Do you know an Android phone that instead of a soldered on flash IC has a removable micro SD card and can boot from it?

I imagine how easy backup and unbricking could be if such a thing existed.


问:
Phone turning off when turned upside down
Phone: Sony Xperia 10 ii

So i dropped it a few weeks ago and now it turns off whenever i flip it upside down. The software stops and screen stays on for a few seconds, then turns off too. Does this indicate that it's something with motherboard, bc i suppose it would turn immediately off if the problem was loose battery connector. I also took it apart and looked inside, the battery cable was in place and under a shield.

Also not sure if this is the correct place to ask about phone repairs. If not, please suggest something.


问:
How To Move Picsart and Phonto Fonts To A New Phone
I have two apps on my phone (PicsArt & Phonto) that can handle fonts on images.

It took me a long time to install fonts on these apps, especially the non-English fonts.

My old phone was Samsung A70, and the new one is Samsung Galaxy Note 9. They have Android 9 and Android 10, respectively.

I seamlessly moved most of the staff from A70 to Note90 using the SmartSwitch app. However, the related data for these two apps have not been moved.

I tried to find the related folders that contain these apps' data to copy them, but it did not work for Phonto and no such folders in the PicsArt case. I could not find any solution on the Internet either.

Note: The PicsArt on the new phone will not even let me install the fonts again without subscribing and paying for this feature.

So, is there a way to move my old fonts for these two apps, especially the PicsArt?
What can I do to avoid the re-searching and reinstallation hassle for hundreds of fonts one by one?


问:
Phone doesn't ring or show a popup for incoming calls
My phone doesn't ring or show the on-screen popup when I receive calls. On incoming calls notification settings, it shows "~1 notification per day," so this may be related.

When I switch the preferred network type from LTE to 2G or vice versa, it rings and shows a popup only for the first call. When I make the second test call, it no longer rings or shows the popup until I change the preferred network type.

What may be the cause of this issue, and how to fix it? Is there any way I can increase the frequency of "~1 notification per day" or even unlimited?

Settings:

Mobile data: On

Do not disturb: Off

Airplane mode: Off

SIM status > Mobile network state: Connected

Incoming calls notifications:

Pop on screen: On

Sound: Chosen

Show notification dot: On

It shows "~1 notification per day"

What I've done:

Reset network settings

Re-inserted the sim card

Restarted the phone

APN settings:

Tried different settings as suggested by my phone provider

Note:

This phone is supported by my phone provider

The same SIM is working fine on another Android phone

Thank you.


问:
How to disable app background data usage via adb without root
I'm trying to disable unnecessary apps and their background data usage on an Android 10 device, using the following commands:

```<code> adb shell appops set package_name RUN_IN_BACKGROUND ignore
 adb shell appops set package_name RUN_ANY_IN_BACKGROUND ignore
 adb shell appops write-settings
 adb shell pm disable-user package_name
</code>```

Question: How to disable background data usage for the package with ADB without root access?


问:
Is it possible to change the default telephone calling app for another of different brand?
I want to use the telephone calling/SMS app that I have in a LG G4 in a Samsung S9.

Is it that possible?

The LG G4 has a feature that the Samsung app doesn't have and I use a lot.


问:
Is battery protection mode still active when the device is off?
I have a lenovo tablet that has a charging dock that it's left in 24/7 (or at least almost 24/7) I have turned on battery protection mode to preserve it's longevity, but I am unsure whether the device will continue to charge past the 60% threshold when the device is off. Does anyone know if battery protection mode stays active?</p>


问:
Pixel 3 not automatically connecting to 2.4 Ghz network
I have a dual band router with 2.4 and 5 GHz channels, and the 2.4 GHz channel has a much better signal in my house, and is generally fast enough for the purposes I use my phone for.

Only problem is, the phone (Pixel 3, running Android 12) never saves the 2.4 GHz channel. Every time I want to use that channel after disconnecting, I have to manually re input my password, and while it connects, it's a bit inconvenient.

It's only my phone, as other devices in the house don't have this problem. The router is a Nokia Beacon 2.

Any thoughts?


问:
Apk android with signature scheme v2
Is it possible to unpack an application and re-pack it with changes and make it work on Android 11?

I unpacked and recompiled an app without making any changes. I later signed it following this guide, but when i try to install it with adb, I obtain this error:

Failure [INSTALL_FAILED_INVALID_APK: Failed to extract native libraries, res=-2 –

I read that on Android 11 you have to sign the apk with schema v2. I did it but the app gives me an error when I try to install it.

Title: Apk android with signature scheme v2


问:
How do I stop Galaxy Store from updating?
I use Google Play store, and I find it great but I don't really need the auto update feature on my mobile. My mobile has little disk space, so I did the natural thing, uninstalling the updates for various apps, turning off the auto update feature, (via auto update apps-> never).

But then I realised the Galaxy Store app itself can auto update whenever it wants, resetting my device settings, updating a massive bulk of unwanted updates to absolutely useless yet non deletable apps.

How can I keep Galaxy Store from updating?


问:
How to disable maximum camera brightness on Samsung Galaxy A10s Android 11
In June, I upgraded to Android 11. In Android 10, you could set the screen brightness in the standard Camera app, just like in all other apps. But in Android 11, the camera automatically turns on at maximum screen brightness, and you can’t change it. How can I turn off the maximum screen brightness and make it possible to adjust it? I need this because I use my smartphone at the minimum screen brightness, and the photos are noticeably darker than in the preview. Therefore, in the camera, I also want a minimum screen brightness.

```<code>Samsung Galaxy A10s
Samsung SM-A107F/DS
Android 11 R
One UI 3
Samsung built-in Camera version "11"
</code>```