问:
Automatically restart screencasting on phone
I have an app that continually casts the screen so I can capture images that I run through a tensorflow lite model for object detection. On Android 9 I was able to check a box to remember my decision to start the recording of the screen so when I restart my phone I don't have to intervene to start the service . Now an Android 10 and above they've removed that box and you have to tap it to enable it every single time the phone restarts. How can I Ensure that the screencasting automatically restarts whenever the phone is turned off and turned back on in Android 10 and above. Can I use phone administrator to accomplish this?</p>


问:
downloads not started
I have just got a new android 10 tablet and I'm having a really stupid user interface problem.

When I click a link to a PDF document in the web browswer (Chrome) I click download and nothing happens.
After much routing around I eventually found the downloads listed in the new "google go" app.
This lists my downloads as "downloaded not started" once for each time I clicked it.

There is no obvious way to start the downloads from here.

This is very stupid default behaviour. How do I change it?

I read around somewhere that I needed to:

install a pdf viewer app - done

change the file associations  (in settings/apps & notifications/default apps)

There is no file association for PDF and no (obvious) way to add a new one
I just have:

Assist App   - Google Assistant Go

Browser App  - Chrome

Home App     - Quickstep

Phone app    - phone

SMS app      - message

<blank>    - opening links

I select a PDF viewer (e.g. Adobe) and try to enable "open by default". Nothing happens.

I did actually get some PDFs to download and thought I had fixed the problem but the next time I tried it happened again.

What am I doing wrong?
I find it hard to believe Google can have so thoroughly broken something as basic as this. So what am I missing?

What I expect:

I should be able to download arbitrary files to an arbitrary location
(after clicking that I accept the risk if fine)

Something should tell me where the files were downloaded to without having to search the internet for an answer.

PDF files should open either in the browser directly or from a 'downloads tab'

The "go" app should have a button somewhere to let me start the downloads

How do I make this happen?

Are the "google Go" and "google files" apps the problem? Can I/ Should I replace them with something more intuitive.

The tablet is something model is listed as "Q3".

ContentLicense: CC BY-SA 4.0

Title: downloads not started


问:
Unknown phone number
An app that I need is not recognizing a SIM/Phone number.

...But the problem is not the app:

Before we go: I've visited other forums, but the answers are uneffective, completely unfit, or oriented to old androids.

If I go to Settings > About phone > Status > SIM Status, I get many Unknowns;

If I go to Settings > Connections > SIM management, the phone number shows Unknown;

I've tested on 5 different phones (see below). This problem happens on three of them, and works as supposed on the other two;

The phone receives and sends calls and messages;

I've resetted APN and stuff, as suggested on other sites;

There is no option to change my own number on any setting

The SIM card is more than two years old.

Below:

Does not work on a new Xiaomi, nor on a Galaxy A01 (gotta make work on this one). Calls and SMS work normally.

Used to work on a Galaxy S9. No one can remember when it stopped.

Works on two motorolas, one old, probably G3, and the other is a G6. Calls and SMS work normally.

Update:
it happens with another SIM.
That SIM belongs to the G3 above. Both SIMs works well on the G3 and the G6, none of them has the number identified on the defective ones (Galaxies and Xiaomi).

Title: Unknown phone number


问:
why is my Samsung tablet listed as a modem?
Exactly what the title says.
It happens when I boot to the bootloader, while my T295 is connected to my PC via USB cable.
How do I fix it?</p>


问:
How can I export all of my MMS pictures before changing phones?
I am currently using the stock Google Messenger app which came installed on my LG V20. I'm getting a new phone and backing up my data beforehand. It turns out that Messenger doesn't have any method to export all the attached MMS pictures. I can long-press each picture and save it individually, but then I have to scroll through hundreds of threads and tens of thousands of messages! I'm guessing I have ~1000 pictures buried in there...

Now I'm pursuing other apps. Perhaps I could import my MMS messages into a new app which would then allow me to save them?

There used to be something called "Save MMS", but it's no longer available. SMS Backup and Restore supposedly backs up pictures in XML format, but I haven't found a way to extract them into files. It looks like Textra will auto-save incoming MMS pictures into a directory, but not with old pictures found during an import...

My goal is to save these images as files and move them to a computer. I don't want them on the new phone.

Does anyone have any clever ideas?


问:
How to recover lost/deleted images
So basically it went like this:

1.) I plugged my phone to my laptop and transferred all my photos.

2.) After having successfully copied the pictures, I deleted them on my phone via the laptop then unplugged it after.

3.) I checked my laptop and there was one album that was empty. I tried checking it on my phone but the album wasn't there.

What happened and is there any possible methods in recovering the album?

Title: How to recover lost/deleted images


问:
Android 9.0 not showing SSID - Chrysler Uconnect
Recently I bought a Chrysler Pacifica 2019 which has Uconnect 8.4 and built in WiFi. I also bought couple android 9.0 headrest monitor. When I am trying to connect the android devices it doesn’t show the Uconnect WiFi SSID. But it shows my home WiFi and can connect. My iPhone can connect to Uconnect car wifi. The Uconnect WiFi had WPA2 security and my hobe had WPA2 PSK. Please assist.</p>


问:
Make my screen unlock pin longer than 31 digits
My question is pretty self-explaining. Currently I have a PIN number of maximum possible digits (31) that my Android 10 supports (phone is Huawei P20 Pro). Is there a way to make it longer than that? Any third party software, by rooting the phone or something similar?</p>


问:
enable usb debugging via ADB from recovery?
Since ADB debugging is not ON, I keep it off unless I need to do something, I now cant use even Vysor to view whats on screen since my screen died with just some color dots and lines seen on screen. I can only see it in ADB in recovery and funfact - I can still view its files when it connects to computer.

Can anyone tell me how to 'see'the device in regular state via ADB? Like on vysor, I need to see it in adb devices first.

Can I enable USB debugging using adb?

how similar

Now problem is: I get

```<code>mount: mounting /dev/block/mmcblk0p24 on /data failed: Device or resource busy
</code>```

when I try to do the idea listed there,

persist.sys.usb.config, yes done, I even tried ptp and put back there

persist.service.adb.enable=1

persist.service.debuggable=1
persist.sys.usb.config=mtp,adb

in /system/build.prop  - I dont have this file in system... I have default.prop (I added such lines there then pushed the edited file back) btw having installed TWRP and Magisk. TWRP is my recovery  I cant see anything on screen.

Then I try to adb reboot but even if it goes on, empty list of adb devices. I tried making a build.prop with these and pushing it but no change

Is it because the phone goes in lock screen and you cant see the device listed if not unlocked?

```<code>Starting TWRP 3.2.3-0-840f04f7 on Sun Dec  6 11:47:42 2020
 (pid 151)
BOARD_HAS_NO_REAL_SDCARD := true
TW_NO_REBOOT_BOOTLOADER := true
RECOVERY_SDCARD_ON_DATA := true
I:Lun file '/sys/devices/f9200000.ssusb/f9200000.dwc3/gadget/lun0/file' does not exist, USB storage mode disabled
TW_HAS_DOWNLOAD_MODE := true
TW_INCLUDE_CRYPTO := true
I:TW_BRIGHTNESS_PATH := /sys/class/leds/lcd-backlight/brightness
I:Found brightness file at '/sys/class/leds/lcd-backlight/brightness'
I:TWFunc::Set_Brightness: Setting brightness control to 162
I:LANG: en
Starting the UI...
Skipping adf graphics because TW_TARGET_USES_QCOM_BSP := true
cannot find/open a drm device: No such file or directory
fb0 reports (possibly inaccurate):
  vi.bits_per_pixel = 32
  vi.red.offset   =  24   .length =   8
  vi.green.offset =  16   .length =   8
  vi.blue.offset  =   8   .length =   8
setting GGL_PIXEL_FORMAT_RGBX_8888
double buffered
framebuffer: 3 (540 x 960)
Using fbdev graphics.
I:TWFunc::Set_Brightness: Setting brightness control to 162
I:Loading package: splash (/twres/splash.xml)
I:Load XML directly
I:PageManager::LoadFileToBuffer loading filename: '/twres/splash.xml' directly
I:Checking resolution...
I:Scaling theme width 0.500000x and height 0.500000x, offsets x: 0 y: 0 w: 0 h: 0
I:Loading resources...
I:Loading variables...
I:Loading mouse cursor...
I:Loading pages...
I:Loading page splash
I:Switching packages (splash)
=> Linking mtab
=> Processing /etc/recovery.fstab
I:Reading /etc/recovery.fstab
I:Processing '/cache'
I:Processing '/data'
I:Processing '/system'
I:Processing '/boot'
I:Processing '/recovery'
I:Processing '/firmware'
I:Processing '/efs'
I:Created '/efs' folder.
I:Processing '/persist'
I:Created '/persist' folder.
I:Attempt to load settings from /persist settings file...
I:InfoManager loading from '/persist/.twrps'.
I:TWFunc::Set_Brightness: Setting brightness control to 162
I:TWFunc::Fixup_Time: Pre-fix date and time: 2020-12-06--05-47-43
I:TWFunc::Fixup_Time: Setting time offset from file /sys/class/rtc/rtc0/since_epoch
I:TWFunc::Fixup_Time: Date and time corrected: 2020-12-06--05-47-44
I:Processing '/preload'
</code>```


问:
Apps killed by android:Redmi S3
Phone model : Redmi s2
Ram : 3 GB

My phone is killing apps when more than one app is running.

Even when messaging apps are running like messenger. I can't use messenger when other apps are in background.

Task manager always shows 1.3-1.5 GB free memory (So, I don't think that this is because of low memory). I tried with "no restriction" options in battery saver but it doesn't help.

Is there any way of getting out of this?

Title: Apps killed by android:Redmi S3


问:
(Xiaomi Mi 9 Lite) Mobile data turns off automatically when screen is off!
I have an issue with Mi 9 Lite, when I lock my phone, mobile data turns off automatically after a short period of time, it will turn on as soon as the screen turn on, I tried to enable "Mobile Data Always Active" in developers options but still the same!
Does anyone knows how to disable this?</p>


问:
The installation of an application in the Google play store is stuck on pending. How can I know what is causing it?
The installation of an application in the Google play store is stuck on pending. How can I know what is causing it?


问:
Chome flag "Overscroll history navigation" by default
I have casually found this feature without having enabled anything in

chrome://flags.

Suddenly the option has disappeared.

Why this behaviour? I don't understand why the feature was enabled, and I can't see why it suddenly has disabled (I've found Default mode checked in flags section).

EDIT
Chrome version 81.0.4044.96


问:
Change 5 GHz Wi-Fi Access Point channel
Is it possible to set or change the channel of the Android Wi-Fi AP?
No matter it is using root or non root methods.

I'm currently on Android 10.

Title: Change 5 GHz Wi-Fi Access Point channel


问:
Android "managed device" recognized as mass storage device. adb doesn't see device. How do I do I determine drivers?
I have an android "managed device" that seems to have been some company tablet. No discernible brand. When I boot, it gives a screen with only a settings app. The settings app is very slimmed down, without access to debugging tools.

Debugging should be allowed by default on this device, because from what I understand, apps were installed and uninstalled from a company kiosk. Therefor, debugging would have had to been enabled.

It is a mediatek device with VID_0E8D. It's got pretty nice hardware. I'd like to be able to at least install apps on it, if not root it and re-install android.

It seems to have locked boot loader.

How to I figure out which drivers I need on windows 7 to recognize it as an android device? android studio nor adb can see it, but I can access the file system. Not the .android system files, just a few redundant files and folders that show up.

Any help would be much appreciated.


问:
Screensavers for 200 tablets - accessed centrally from one computer - Is this possible?
Hi I'm involved in a project to deploy 200 tablets. All devices will be on different networks in various locations around Australia.

I would like all devices to access the one set of screen savers and be able to update them all on demand. Is there an easy way to do this?

Currently I am thinking of logging into all devices from one gmail account and assigning the screensavers to google photos, and changing the photos from this one location.

I understand that google may not allow to 200 devices to sign into from one account.

Does anybody have any better ideas?  Many thanks, Anthony


问:
Android 10 forensics - Root a cellphone without SD Card and without installing any external apps
I would like to root my Samsung J6 mobile phone that is running Android 10 in order to apply forensically sounding techniques on it (basically recovering deleted data etc). So far, as I researched on web, all of the rooting methods require installing of softwares such as magisk to a component such as either SD card or internal memory of mobile phone. The thing is, I don't have an SD Card inserted on the phone, and I don't want to install any external software into my cellphone memory. Is there any way to root this cell phone without installing any app into its memory(rooting via using only connected computer)? Any help will be appreciated.</p>


问:
Notification icons are not being displayed on the status bar
You can see that I have notifications in WhatsApp and Messages app but the notifications icons are not visible on the status bar. I have searched through the settings but couldn't find a way.

Device = Oppo F9

Version = 8.1 Oreo


问:
RCA Galileo Pro Upgrade?
I have the RCA Galileo Pro and it is very slow, is there a way to upgrade?  I have always had a Samsung, so this is a big change.</p>

Title: RCA Galileo Pro Upgrade?


问:
AVD adb push gapps
i try to get gapps working on my avd. I already use a google api image, but anyway the store is missing. Every tutorial tells me to push open gapps via adb:
https://medium.com/@dai_shi/installing-google-play-services-on-an-android-studio-emulator-fffceb2c28a1

But i have the problem, that system is not writable. I already tried various solutions like this one:
adb push not working on /system, read only

Finally i think this can be the solution: https://stackoverflow.com/questions/49426174/cannot-push-to-android-emulator-because-of-read-only-file-system/49427040

But my problem now is, that the emulator only shows a black screen when i use the -writable-system option. Otherwise it starts fine.

Can someone help me to get the store apk installed on my virtual device?

Title: AVD adb push gapps


问:
What Android Stock Apps are replaceable through ADB?
What's the list of stock android apps that a user can replace on their phone?

e.g. could I replace com.android.keyguard to change my lock screen? i.e. Write my own version of it.

I am running Android 8.
A list of replaceable apps could really help.

Thanks!


问:
Cannot install apps after removing memory card
The memory card slot of my phone stopped working and some of my apps were stored in the memory card. Now i am unable to install the app again in the phone memory.

So any idea? I tried to follow the steps in the link in the picture, but dosen't help.


问:
Is the Android Emulator from Android Studio vulnerable to Dirty COW?
I want to try out the DirtyCOW Exploit in a Virtual Machine or an Emulator. I have made DirtyCOW run on some versions of Android-x86, with Android-x86 running in VirtualBox.

I want to know if DirtyCOW works in the Android Emulator aswell. Does the emulator emulate the linux kernel, or are the syscalls implemented by the emulator?


问:
Forgot encryption password, too many wrong password attempts = wipe: Can I image my phone to "get more password tries" by restoring an image?
Forgot my Android encryption password, only have 10 tries left before data wipe, how can I backup my phone to get 10 more tries if I don't manage to find the password within 10 tries?

For context:

ROM: Lineage 14 official build Custom recovery: TWRP Bootloader:
Unlocked The phone is not rooted. No SD card port.

*The phone is encrypted with a password (not a PIN)

*I don't remember the exact encryption password, so I can't get past the password prompt after booting. But I am sure I can find it if I keep trying. It might take me more than 10 tries to enter all variations though.

*I can't access or mount /data from TWRP (nor can I get past the password promt after booting) without the password.

*After entering the wrong password multiple times, the password prompt says I only have 10 tries left before the data gets wiped, and I must avoid this at all costs. (Since Android 6 or 7, there is a limited number of tries before the phone gets wiped)

My question is: How can I make a backup of the phone in it's current state, so that even if I don't manage to enter the right password after booting the phone 10 times, I can restore the phone in it's current state and still have 10 more tries (and eventually repeat this if I still don't manage to find the password after 20 tries)?

I have found some tutorials that show how to backup /dev/block/mmcblk0, but they require root (I can't install anything in my phone since it's encrypted...). And I am not even sure if it will work to restore the phone in it's "10 tries left".

I also don't have access to /data partition from TWRP without entering the password (it shows "0MB") so I can't backup the /data partition from TWRP.

Thanks


问:
How to create an album without uploading to Google Photos cloud
On my Android device, Xiaomi Redmi note 8, the sync with Google account is disabled. For Photos, too. Today, I created a new album on the photos and noticed that it started to upload the photos, and it is already on the wifi. This is strange since the syncs are closed.

I want to prevent this, looked for the options, and couldn't find one. I've seen this question and its answer, however, none is helpful.

My guess, Google covertly implemented this feature so that any album other than the main, is uploaded to the cloud. Is this correct?

Can we create an album without uploading it to the cloud?

Is there a way to prevent this, other than the temporary Wi-Fi disablement?

Note to the covert adversary:

There is no notification for this, just show a dialog to choose. Give us our liberty!

On Accounts& Sync settings, even the sync is closed, once you touch one of the items, the item immediately starts to sync. What a shame!


问:
unable to see music files in any player app
This is a seemingly common problem and I viewed the dozen suggested posts before posting this but none of that helped since it was mainly things I already tried.

50 GB worth of MP3s in /sdcard/Music
I can see all those files in various file browsing apps and terminal emulators but no music player app can see them. I tried three different players already. They can see music files in Download directory but not in Music. There was a .nomedia file in there but I deleted it days ago and re-scanned media multiple times and rebooted multiple times.
I had all this music in the same location on my last phone Pixel 3 Android 9 but then got a new phone Pixel 5 Android 11, moved all the files onto it, just via file copy from Windows, but player apps can't see them. It's almost as if that .nomedia file was still in there, totally invisible to me.


问:
Android not registering A and PTR records with DNS server
I have been running ISC BIND and DHCP servers on my private lan for quite some time now. Recently, I configured the two servers to enable Dynamic DNS updates to my private zone. It seems to be working, as a couple of laptops and my old phone (Motorola Droid, rooted with an older version of CyanogenMod) did register their A and PTR records with my DNS server.

However, my current phone (Samsung Charge, rooted with Eclipse ROM v2.0) is NOT registering with my DNS server. I have noticed that in my lease cache (excerpted below), my Charge doesn't have any of the DDNS related entries that the other leases do. I'm thinking that the Charge, for whatever reason, isn't passing it's hostname to the DHCP server. Unfortunately, I'm not sure how to confirm this suspicion, much less correct the behavior if I'm right. Any help in resolving this would be greatly appreciated. Thank you.

Excerpt of /var/state/dhcp/dhcpd.leases:

```<code># This is the lease for the Samsung Charge. It did NOT register with DNS.
lease 192.168.1.127 {
  starts 6 2012/05/19 01:10:38;
  ends 6 2012/05/19 01:20:38;
  cltt 6 2012/05/19 01:10:38;
  binding state active;
  next binding state free;
  rewind binding state free;
  hardware ethernet 78:d6:f0:69:af:9f;
  uid "\001x\326\360i\257\237";
}

# This is the lease for my mother's laptop. It DID register with DNS.
lease 192.168.1.126 {
  starts 6 2012/05/19 01:10:45;
  ends 6 2012/05/19 01:20:45;
  cltt 6 2012/05/19 01:10:45;
  binding state active;
  next binding state free;
  rewind binding state free;
  hardware ethernet 90:4c:e5:47:cf:ee;
  set ddns-rev-name = "126.1.168.192.in-addr.arpa.";
  set ddns-txt = "0061e3886dfc34c99e5f945805f4197a39";
  set ddns-fwd-name = "hestia.[public name removed].dyndns.org";
  client-hostname "hestia";
}
</code>```

ContentLicense: CC BY-SA 3.0


问:
Unlocking apps on "recent apps" screen on AOYODKG Tablet 10-inch
I have AOYODKG Tablet 10-inch updated all the way. On the "recent apps" screen, there are locked apps, and I want to unlock them.

I've looked through many websites and tried through settings, and I've tried pushing the actual lock button to unlock the app. There is also no 3-dot on the top-right of the app.

How to unlock those apps? I would also love to disable the feature if possible.


问:
Google won't read web pages on my Android 8.1.0 phone
When I bring up a web page on Google assistant & say
"Hey (or Ok) Google read it" nothing happens, & in Google Go, the play button triangle is greyed out.
These apps have permission to use the microphone and I have tried making seemingly helpful changes to all the obvious settings I could find.</p>


问:
SNote and TWRP manual restore problem
This is my first time posting here and I am not sure how to best classify this question with tags, so please excuse me.

Here's the problem: I have backed up the data partition with TWRP and then wiped my Note 10.1 2014 before installing a fresh stock ROM. I did this because it went into a bootloop. When I tried to do a restore of the data partition through TWRP it sent the tablet back into a bootloop, so I had to redo the wipe and installation. I am only really trying to get one thing from the data partition, my S Note notes, so I thought I'd try to do this manually. I unzipped one of the TWRP backup archives (data.ext3.win001 or something like that) and found the folder com.samsung.android.snote in there with the .SPD files inside.

However, the .SPD files actually appear as folders on my Mac, not zip archives as they should be. Something must've gotten mixed up in the TWRP backup. They contain all the appropriate files, and they are of the appropriate size, so I thought I'd zip them on my computer, change the file extension and put them on the SD card and back into the phone to be imported into S Note. However, S Note says "Invalid file format" when I tried to open them.

Does anyone have an idea about how S Note files work, and how they can be correctly zipped, give that I have all the correct contents? I know it's a long shot, but any assistance would be welcome! Cheers!

Title: SNote and TWRP manual restore problem


问:
adb appops command error trying to disable vibration for a specific app in Android 10
Referring to this excellent Q&A:
How to determine which app is causing vibration?
I opened an adb shell and ran:

```<code>for pkg in $(pm list packages | sed 's/package://')
do
    echo "$pkg $(appops get $pkg VIBRATE)" | grep 'time=+[0-9]*s'
done
</code>```

which resulted in:

```<code>tesmath.calcy VIBRATE: allow; time=+11s553ms ago; duration=-18585d23h50m2s991ms
</code>```

I then ran:

```<code>appops set tesmath.calcy VIBRATE ignore
</code>```

but it resulted in the error:

```<code>appops set tesmath.calcy VIBRATE: inaccessible or not found
</code>```

How can the app initiate vibrations but yet this adb command doesn't successfully disable them in my Android 10 device?


问:
Run Tasker if battery falls from a specific value to another one?
I am struggling to set up a Tasker profile so that it performs a task when battery falls from value X to value Y.

I always get the error that the Y value (to) cannot be smaller than the X value (from).

Does anyone know how to properly set up a Tasker profile that runs a task when battery falls from a certain percentage to a lower one?


问:
sharing network using adb port forwarding

A bit of background

I have an Android phone, which unfortunately cannot usb-tether while it is connected to the internet (using wifi or mobile data, but it works when the device is not connected to the internet. Wifi and Bluetooth tethering have this problem too). Now I want to connect my PC to the internet using my android phone (using only wired connection).

The unideal solution

I came up with a rather hacky solution which has a minor problem: I compiled gost - a proxy server - for my device (FYI, I used GOOS=linux GOARCH=arm environmental variables to build the binary) and ran the binary on my Android phone on port 8080 (I placed the binary in /data/local/tmp. I ran it the obvious way using adb shell without superuser privileges). Then I used adb forward tcp:8080 tcp:8080 to forward device's port 8080 to my PC's port 8080. After that I used localhost:8080 as a socks5 proxy on my PC and could access the internet.

The problem is that I cannot use certain applications as they don't support connecting through proxy (some of them run on a lower network layer than a socks5 proxy, so there is no way for them to work).

My question

Is there any way to run a VPN server on my Android phone (which conveniently has root access too) and use it like the way I currently do? If so, I'm only interested in solutions using well-maintained opensource software.


问:
To add widgets from the app drawer, launchers need to be installed in /system. Why?
ICS' stock launcher, Apex, Nova and Trebuchet all support adding widgets by dragging them from the app drawer. However they can only do this if they are installed as a system app. One of them - I think Nova - also provides a helper app that can be installed in /system while the rest of the app remains a regular app.

Why can't normally installed launchers provide this feature?


问:
How can I save my google play account? My old email is being closed and I can't find a way to add a new one
I have attempted to add an alternate email, but it says I don't have permission. This is an old work email that is being closed. I am trying to save my google play account, but can't find a way to transfer it to a new email. Let me reiterate that it says I don't have permission to add an alternate email.</p>


问:
How to resize SD card using terminal? and create a new partition on it?
I don't have SD card reader for my computer, so maybe I could do it directly from termux instead.

How to resize SD card without losing data? And make new EXT4 partition.

(parted) p:

```<code>Disk /dev/block/mmcblk1: 63.9GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:

Number  Start   End     Size    Type     File system  Flags
 1      1049kB  63.9GB  63.9GB  primary               lba
</code>```


问:
Parts of touchscreen not working and progressively getting worse - what's causing it?
First it was like this, then this, and now this. The white part is the part that's not responding to touch. Notice how it increases by an entire row in each picture. This is over a span of 3 weeks.

It's driving me crazy! What's causing it? I didn't drop the phone or get any water in it (as far as I can remember). It just happened suddenly. Does the digitizer go bad by itself without any physical damage? And why is it increasing like this?

It's the same in safe-mode and recovery. How do I diagnose this? I already ady cleaned the connector. I really don't want to get a new digitizer and then it turns out to be not it.

Thanks for any help!

Moto C Plus | Android 7 | Rooted


问:
Any way to root a crushed phone and get encryption file from it?
tl;dr Is it possible to root an Android 8.0 phone that is accessible only via USB? Is it then possible to extract encryption .key file out of it in order to decrypt its SD Card that was formatted and encrypted as Adoptable Storage? Can all of this be done with not functioning, broken screen?

There is a lot of good quality guides here on how to encryption .key file from /data/misc/vold folder and use it to decrypt Adoptable Storage on any Linux-based computer. But all these guides assume that you have:

rooted phone,

access to phone's screen.

Your phone must have screen operable to either:

install and use some app on it: here or

confirm some dialog on it, unlock screen lock, if accessing it via USB: here or here.

Can the very same process be achieved if my phone have a screen in pieces?

Can I:

root a phone and

copy encryption .key file from /data/misc/vold folder after rooting,

when I only can access my phone via USB? Assuming that screen cannot be used at all.

My Motorola Moto Z2 Play is now in pieces after a car run over it. Screen is in pieces, battery is separated. Mainboard seems in one piece and I think is functioning. Whenever I attach USB it seems to be starting up.

Is there any way to get encryption key file from it, doing this totally remotely (via USB)? Or attaching a new, functional screen is an absolute must in this case?

EDIT: The phone in question is Motorola Moto Z2 Play, which started its history with Android 7.0.0, then went through A7.1 and landed finally with Android 8.0.0, updated about 1+ year ago. All versions of Android on this phone seems very close to stock one, as in most Moto phones.

Based on this article, I believe there's a FDE / full disk data encryption implemented there.


问:
a process deleted some vital folders and files how do I track it down
admittedly I am rooted on a phone with unlocked bootloader & a Havoc custom  GSI rom  Android 10
I have hidden magisk root from all applications  - every application except the ones that need it

in spite of this and entire folder on my internal storage - download folder as well as documents folder - the document folder itself was deleted and the download folder was emptied completely

I have access to logcat and logcat does not reveal any information

I regularly run a malware check and it comes out ok.

the corresponding data on my external micro SD card is all right

just yesterday sent folders of my WhatsApp image    (  /sdcard/WhatsApp/media/WhatsApp Images/sent   ) directly got emptied without me doing anything. earlier I saw WhatsApp 's message that it is backing up my data kind of 40% of 6 GB
and it was taking forever to do that on a 10 MBPS high speed internet connection .  so I stopped the backup process  - but why would it want to delete everything in the sent folder ?
( btw my WhatsApp folder on /sdcard     is bind mounted to a special partition on my micro SD card which is ext4 ... now you know why I wanted custom rom and root   !  )

here are my questions

--- how do I trace back as to what process caused these deletions
--- in the future so as to avoid this or have better traceability what what should I I be installing or modifying or taking as preventive steps.


问:
YouTube Premium doesn't play the video in the background but only shows thumbnail instead, and screen starts flickering
With YouTube Premium, the video will not play in the background, but only the thumbnail will appear. When you tap it open, the screen starts flickering.


问:
Why my Android 5.1 MEDION E4506 smartphone fails to detect BLE smart band?
Why my Android 5.1 MEDION E4506 smartphone fails to detect BLE smart band ?

from
https://developer.android.com/guide/topics/connectivity/bluetooth-le

"Android 4.3 (API level 18) introduced built-in platform support for Bluetooth Low Energy (BLE) in the central role and provides APIs that apps can use to discover devices, query for services, and transmit information.

and next

"Set up BLE

Before your application can communicate over BLE, you need to verify that BLE is supported on the device, and if so, ensure that it is enabled. Note that this check is only necessary if <uses-feature.../> is set to false.

If BLE is not supported, then you should gracefully disable any BLE features. If BLE is supported, but disabled, then you can request that the user enable Bluetooth without leaving your application.

I have installed Lefun Health, Yoho Sports, which should work with my BLE smart band.
Unfortunately, my smartphone, installed apps fails to discover my smart band.

I have bluetooth enabled in smartphone and smart band is not discovered.

Since my ffriend, using iPhone succeeded to connect to my smart band, so it looks BLE is enabled and on

Are you aware of any BLE service generic app to detect, where is the problem ?

My smartphone is MEDION E4506 (Lenovo, so Android 5.1 should support BLE, so let me know what fails
and do I really need to get a newer smartphone ?

similar question
Detect Android device from BLE device (How bluetooth works ?)

thank you


问:
droid explorer can't recognise sdk directory
droid explorer can't recognise sdk directory

That is the SDK directory, it's what Android Studio shows under file..project structure. C:\Users\User\AppData\Local\Android\Sdk


问:
How to stop WhatsApp from deleting media from gallery when the sender deletes that message?
When someone sends me media (photo/video) on WhatsApp, I can download it, and it gets saved to my phone's internal storage, in a gallery album created by WhatsApp called "WhatsApp Images".

If the person who sent the media then deletes that message from the chat, the media file is then deleted from my phone's internal storage too, although I have already downloaded it. However, if I move the media file out of the "WhatsApp Images" gallery album before the message is deleted, then the media is not deleted from my phone.

Is there any way to prevent WhatsApp from deleting media from the "WhatsApp Images" album after I have downloaded them, if the sender deletes the message?


问:
I want to do a factory reset with recovery system. Recovery "enter" button is the home button. My device doesn't have a home button
Good day.
I want to enter the recovery and do a factory reset, because I've been locked out.

As stated, my device doesn't have a home button , but the "enter" button in recovery mode is the home button, not the power button. There's a reset pinhole, tried it , but I'm still at the lock screen that requires my email and password. My device can't be connected to Wi-Fi anymore. The Volume Up & Down scrolls through the options.

Device is NOT rooted

Device Model: DINAMIK M2in1  (Don't bother trying to find it, it's extinct even on the net)

Android version Unknown

Android System Recovery 3e


问:
Storage Booster - Disable duplicate image scan
I have a Samsung Galaxy A5 with Android 8.0.0.

Occasionally I get a notification that Android found many duplicate images:

It says: "Storage-Booster. Duplicate image found. There are 2549 duplicate images on your phone."

Most of them are images sent or received by messenger apps but sometimes it also detects similar images as duplicate, in rare cases even totally different images.

I don't want to delete any duplicated images for multiple reasons:

I don't want to delete the original image, neither want the image in the messenger become unavailable

I don't want to delete just similar or even totally different images

They only occupy around 1 GB and I have plenty of free space on my SD card.

Is there a way to completely disable the duplicate image scan? I also expect it to draw a lot of energy when regularly comparing thousands of images in the background.


问:
Get the actual app's data files location
tl;dr One of my apps stores its data in some weird place that isn't covered by Google backup. And thus it was not restored after the latest system recovery. I've lost all my data for that single app. I want to know the location of those files, to back them up manually and avoid similar situations in the future. Can I check this on an unrooted phone?

My phone has badly crashed. I have recovered my data (on a new device) from Google backup. It turned out that I have recovered everything (system, settings, photos, messages, apps, and app data) for all but one application.

Happened for just this particular single app out of fifty in my case, so must be a developer's fault or wrong design decision to store data in some weird place.

Want to avoid this in the future and backup data for this particular app manually. But I need to know, where exactly this app is storing its data. Can I learn this on an unrooted phone? Do I have some tools for this? If yes, then how to proceed with this?


问:
Is there any options to Boot Android device on connecting to power supply without root?
I wish to know if there is any options to boot android device automatically on connecting to power supply. i am not considering rooting options as i was planning for production application.

I have tried to enter into fastbood mode without much success .. trying on samsung galaxy tab A.


问:
How do I block installing new apps and internet browing on my Android phone?
I'd like to be able to block internet access from my Android Pixel 4 cell phone. The ideal solution would prevent me from installing new apps onto my phone. I'd like to have a set of apps, so that I cannot add new apps, such as web browsers. I tried to set this up with Google Family Link, but it will still let you install apps that are rated E for everyone. I also tried this with AppBlock by blocking the app store, but I can download apps from play.google.com from my computer.

I would appreciate any assistance in reaching towards a solution. A potential solution could be one that requires an administrator to have a password to install apps would be acceptable, because I can give that password to someone who isn't me.

I'll note that one possible solution would be to stop internet access with my phone plan. But I'd still like to use the internet for apps like Uber, so that wouldn't work.

Thanks!

OwnerDisplayName: Muhammad Huzaifa


问:
Motorola One Power - corrupt and wouldn't unlock bootloader
My Motorola One Power went blank recently and when I switched it off and then switched it on, an error message was displayed that my device was corrupt, it can't be trusted and it won't boot again. The message asked me to go to Motorola's unlock bootloader page.

So I went on and installed minimal ADB and fastboot, Android SDK. Then I proceeded as stated. I opened cmd there and went for the unlock code and it was failing a number of times.

Next, I downloaded Lenovo's Motorola smart and rescue assistant and tried to rescue my phone but that also was failing.

So on further surfing, I think that I haven't enabled USB debugging and haven't toggled OEM unlocking.

Then I tried downloading the twrp image and booting thru it. So when I run fastboot boot recovery.img

```<code>C:\Program Files (x86)\Minimal ADB and Fastboot>fastboot boot recovery.img
downloading 'boot.img'...
OKAY [  0.636s]
booting...
(bootloader) permission denied!
FAILED (remote failure)
finished. total time: 0.639s
</code>```

So what can I do now? Please help me as I don't want to lose this phone. Also, can the data in it be retrieved in any way?


问:
Extract an image of a corrupted Android partition bit-to-bit
How can I extract an image of the corrupted Android partition mmcblk0 bit-to-bit?
With adb pull, it says remote I/O error after a few megabytes.


问:
How to allow Messages notifications to show?
A couple weeks ago I suddenly stopped getting notifications for the Messages app. I'm still receiving text messages, with no delays.But no notifications are showing up in the top notifications bar. And the phone is not vibrating to indicate that a new message was received. I have a bluetooth connected watch that used to display new messages; that also is not showing alerts for new messages.

I'm pretty sure that the text message app that I'm using is just called "Messages". The icon is a white speech bubble on a blue circle.

I keep missing new texts. The only way to see that there are new unread texts is to manually open the Messages app, and check all the conversations to see if any replies are in bold text (indicating that they are unopened).

I have already clicked the three vertical dots "Settings", "Notifications"
The following settings are already on:

All Message notifications: ON

Other Notifications: ON

Data Download Notification Channel: ON

Allow Notification dot: ON

Android version: 11
Device: Pixel 2
Provider: Verizon


问:
In theory can Samsung devices get root without tripping Knox, for example by exploit?
According to Wikipedia article

Before booting in the main Kernel, Samsung runs a "pre-boot"
environment where it checks for the signature match of all elements of
the OS.

If a method to get root that does not rely on the bootloader existed, would this bypass Knox? For example if an exploit was found? After the e-fuse for Knox is tripped, can it be untripped, or no because it's physical?


问:
Call time prior to answering

Version: Android 10
Brand: Samsung
Model: S9

Is there a way to log the duration of phone ringing, prior to answering or declining a call?
I'm doing this because someone claims to call me, but terminates the call after 1 second, and I need to prove that.
Thank you!

Title: Call time prior to answering


问:
I don't receive when someone sends me messages through whatsapp broadcast
Two of my friends have added my phone number in their WhatsApp broadcast. I used to received messages from them till December 3rd. But now I don't received any messages from them. I checked their phone and sent message is showing, but i dont receive. How to fix this error?</p>


问:
How to boot in recover with Acer DA220HQL
I would like to ask if there is any step by step guide to follow in order to get into boot recovery mode (Acer DA220HQL running Android 4.0.4). Additionally is there any specific version of TWRP suitable for this device?

Your help would be convenient to me!

Regards


问:
How can I create a TWRP nandroid backup without going into recovery?
I want to create a full backup.

I have TWRP installed. But the problem is, part of my screen is not working, so I can't tap on options to enable storage (photos and stuff) backup as it doesn't do that by default.

Basically, I want to tick everything on the backup options.

And I can't do it through ADB because I don't have a computer right now.


问:
VLC black screen, and Disable HW Overlays
I have a Samsung Galaxy Xcover 2, with rooted Android 4.1.2.

I have installed VLC v3.0.13 on it - which is seemingly the last version that can be installed on Android 4.1.2 (all later builds of VLC for Android require Android 4.2+). I really like VLC because it has NFS sharing built in, so I could in principle watch videos from an NFS network share, which I've done previously on other devices with great success.

The problem is: when I play any video on it (mostly 360p .mp4 obtained from youtube-dl), audio can be heard, however in full screen mode, screen is black; when GUI with player controls are shown, one can somewhat discern a part of the video being shown in a stripe underneath the controls; and when the device/screen is rotated, there is a brief flash of the video shown, but then it disappears, and the screen goes back to black.

I have found this thread:

https://emby.media/community/index.php?/topic/31940-black-screen-on-video-playback/ (refers to https://forum.fairphone.com/t/vlc-player-only-shows-black-screen-for-video-playback-on-fp1/19060/7 )

... which seems to describe the exact same problem:

The problem: No video, just a black screen except when you change
device orientation (landscape to portrait for example), when you exit
the playback or when you click settings button, the video appears for
a fragment of a second.

Audio and subtitles playing correctly.

Probably this problem only occurs in some devices.with pre kitkat
versions.

The solution: disable HW overlays in Settings > Developer options (if
Developer options don't shows:
http://www.androidcentral.com/how-enable-developer-settings-android-42)

Ok, so I went to Android Settings / Developer Options, and checked "Disable HW overlays", however, that seems to have no effect (video still does not appear/screen is still black); besides, when I reboot the phone, "Disable HW overlays" is unchecked again - which is also an experience from a Samsung device later in the same thread:

I have this exact same issue, and "Disable Hardware overlays" does not work on my Samsung Android phone.  Also everytime the phone is rebooted this feature is turned off, meaning hardware overlays are enabled.

So, my question is - is there anything I can do, to get VLC to properly play the video on the screen on this device?


问:
Are there any ways to end a screen recording besides using the drop-down menu at the top of the screen?
I love the new screen recording feature, but I'm frustrated that every recording has to end with me pulling down the top menu to end it. What I mean is that this action is included in the recording.

Is there any way to end a screen recording other than pulling down that menu and hitting the button? Some kind of shortcut that cuts it off automatically?

(I'm on a pixel 4.)


问:
stream audio from multiple android smartphones to pc or directly to an earphone and to listen
I would like to know if it is possible to achieve a setup in which I'm able to listen to multiple android phones via streaming audio to pc which may be streamed through usb or via bluetooth.

Or if there is an alternative through transmitting to a device and just connecting that device with some earphones and I would be able to hear all devices at the same time?

Here is the overall picture of this last solution


问:
What algorithm does Android used to translate touchscreen events to scancodes?
I have been debating someone recently about whether physical keyboards are faster than touchscreen keyboards. I have a lot of CS knowledge, but not a lot of Android knowledge. Therefore, during this debate, I have been reading up on how the Android system processes touchscreen events into keyboard events[1]. At this point, my understanding is this:

With a physical keyboard, the keyboard hardware itself can send a scancode that can be translated to an actual keycode at the kernal level through a simple lookup.

With a touchscreen, the hardware device is sending an X/Y position (along with some other data, but not a scancode), which then needs to usually be translated into a scancode by a previously exported virtual key map file. Then that scancode can be translated as expected.

This translation can happen either at the driver level or the software level. I cannot find any source code for driver level, but I found this Java file[2] which seems to do the translation at the software level. However, its implementation is absolutely not what I would expect. It seems as though the virtual key map file is loaded into memory as an ArrayList, where the VirtualKey is a simple static class with some helper methods. Essentially, the VirtualKey class has the bounding box and can determine if a given X/Y point would fall into that bounding box. When the system is checking a virtual key (findVirtualKey, line 786), it simply iterates through the list and uses a helper method to linearly search for the relevant key (it doesn't even bother to precompute the math on the bounding box, allowing it to happen each time).

Am I looking at the wrong place to understand the algorithm used in my phone's virtual key translation? I genuinely expected some kind of spatial data structure like a QuadTree. Is the dumb linear search on an arraylist more effective in practice despite the presumably terrible Big Oh? Have people tested the runtimes? Does anyone know where I can read more about this?

[1] https://source.android.com/devices/input/touch-devices

[2] https://android.googlesource.com/platform/frameworks/base/+/f0e697839a7de4eb080430fd83d44c0b436fdc88/services/java/com/android/server/KeyInputQueue.java


问:
Accidentally wiped internal storage on Nexus 10 via TWRP now I can't turn on my tablet
I wanted to use TWRP to install an Android image but when I was deleting the already existing Android image files, I accidentally pressed "Internal Storage" and now when I try to operate my tablet, it does not turn on and when I put it on charge, it only gives me the battery charging icon. I also can't access bootloader.</p>


问:
Migrate entire WhatsApp from iPhone 6 to Android
I'm looking to migrate my WhatsApp from iPhone to Android, including media (not just chat). I know that it is not possible via native WhatsApp features. I don't want to use a third-party app (not reliable, sensitive & private data).

Is there a way to do it manually somehow? Even if it is conversation-by-conversation (including the media). I mean, it is about putting the right files at the right place at one point. Is there a way to do this manually?


问:
How to adb pull on galaxy s1 i9000 please?
How to adb pull on galaxy s1 i9000 please?

I need to install TWRP but no s1 i9000 (classic ) version was ever made due to lack of a certain recovery partition structure on s1 .
But it is available on S1 Blaze and S1 Fascination which were newer but lower in specs.

Clockworkmod for XXJJVQ Baseband version of i9000 is in many places as a notworking link on forums.

Anybody have Clockworkmod for s1 i9000 XXJJVQ please ?
Or a workaround to make partition image on s1 i9000 ?

I recorded a very important proof today and the file was not saved.


问:
android tv-box not playing embedded videos in any browser, after uninstalling default NETFLIX app that came with the box?
After a lot of research I could not find an answer anywhere so please enlighten me.

I have a tanix tx3 android tv-box that comes with a pre-installed old version of Netflix app which doesn't function properly, so I uninstalled it and installed a newer version apk.

After this action, the embedded videos in any site which I browse do not work. This is valid for any android browser including chrome, firefox, opera, dolphin, duckgogo etc (all with the lastest versions)

I have tried deleting browser cache, enabling desktop site etc Nothing works. In the case of desktop site mode I get an error message "This video file cannot be played. (Error Code: 224002)"

As I have read through many sites this relates to not being able to play certain video files within HTML5. I then kept on reading about JWplayer and so on.

Obviously, when uninstalling the default box Netflix app, something else was removed from my android tv-box regarding video playback. Do you have an idea what is it and how I can fix it?

Thank you in advance


问:
Endless reboots after adb remount on Docker Android 10 emulator
I'm trying to remount the system partition of an Android docker emulator (stable v.30.2.5 x86_64). I use the official docker scripts from the Google docker scripts page. According to the official documentation remounting the system partition can be done with the adb remount /system command so I tried that out but got stuck in a endless reboot of the emulator. I did the following:

Start the docker Android emulator with ./run.sh f47fab55785d -writable-system

Connect the device with adb: adb connect

Root the emulator: adb root

Remount the system partition:
```<code>adb remount /
Disabling verity for /system
Using overlayfs for /system
Now reboot your device for settings to take effect
remount succeeded
</code>```

Reboot: adb reboot

All the commands seem to work as expected and the emulator starts to reboot. However, the emulator gets stuck in an endless loop after some seconds (see logs).

In the logs I see two errors but I don't understand what's causing the reboot. Does anyone know what's causing this endless reboots and how I can remount the system partition?

```<code>kernel: [   11.379317] init: [libfs_mgr]check_fs(): mount(/dev/block/pci/pci0000:00/0000:00:06.0/by-name/metadata,/metadata,ext4)=-1: No such file or directory

kernel: [   13.506403] cfg80211: failed to load regulatory.db
</code>```


问:
Android UI lags / shutters
I often see strange/unexpected slowdown in Android UI irrespective of the device I use. UI suddenly skips frames and all graphical transitions seems to run at a very low frame rate (I would say in the range of 10 fps) and with severe lag. After some time it can sometime recover, but not always: the only guaranteed method to return at full speed is to reboot the device.

It seems strange, because:

it happen on any device I own, but with different absolute effect (ie: on a Mi A2 Lite it is much more visible than on a Oneplus 6T or Mi 10T Pro)

closing all application does not alleviate the slowness/lagging

when it recover, I did nothing fancy at all (maybe I simply locket/unlocked it).

Title: Android UI lags / shutters


问:
Dictation (Voice Recognition) Function has Stopped Working
I have a Samsung Galaxy J3 Luna Pro whose dictation listening function has recently stopped working.  When I press the microphone button now to dictate, the blue button indicating it is listening to dictation comes on for only a split second and then goes off, and the words "try again" appear on the screen. (Previously the blue circular button would stay on the screen for a while while I would dictate).

To try to remedy this, I have gone into settings > language and input > virtual keyboard > Samsung keyboard > reset settings, however it has not worked. I have also tried "clear personalized data," but this has not worked either.

Under virtual keyboard > Google voice typing, everything looks normal there too.

The Internet connection is not an issue, as it works fine. This has been plaguing me for about two months now through multiple reboots of the phone, yet I cannot figure out how to gain my dictation function back.

There is about 675 MB of free space on the device, which should be enough for me to dictate out a couple of sentences at least. Even if there are no apps open, or only one app open, it still happens, so it is not a RAM issue either.  I can't even dictate out a single word before the blue circle quickly turns off and it says "try again." It is 100% not working all the time. It does not 'sometimes work.'

Does anyone have any idea how to fix this?

Is the only recourse reinstalling Android?

If I have no choice but to reinstall Android, how do I backup all my apps before doing so?

I am running Android version 7.0.

Thank you very much.


问:
Android Auto poor voice quality?
I am using Android Auto to navigate via Maps, and it works fine. However, the voice quality is much worse than if I use Google Maps and connect my phone via Bluetooth.

I have tried enabling 48KHz Guidance Audio Sample Rate in the developer settings, but it does not make a difference.

Title: Android Auto poor voice quality?


问:
How to stream an image into camera source?
This is basically the same question as
How to stream an image into camera source trough ADB?

I am trying to stream an image into the camera source of an Android device. This should ideally have effect on all apps that use the camera source.
The solution doesn't have to be by using ADB.

(Sorry my technical understanding is very limited. I was going to comment instead but didn't have enough reputation. Thanks!)


问:
How can I get rid of the "Restart now to finish the update" popup?
I have a Pixel 2 XL that I MUST keep on Android 10 for various reasons. (Yes, I am aware of the implications of doing this. This is a device that I use for development tasks, I don't go to random websites on it, I don't install unknown apps, I never use it away from my trusted home WiFi network, etc.) However Google seems hellbent on making me upgrade. Every few days I get this popup message asking me to "restart now to finish the update." I get this popup even though I have "automatic system updates" turned OFF in Developer Settings, and even though I have Google Play Services notifications turned OFF. Is there any way to stop this message from appearing?


问:
I want to unlock my Samsung a70 without factory reset
My son played with my phone and changed my password and I don't know what is it. I have tried for several months but nothing worked.

Can you please help me because my phone contains important images and files that I want to save.


问:
Forwarding incoming calls to landline when connected to specific wifi-network
I have the following problem: In my house, it is practically impossible to take a call on the mobile phone due to very bad mobile network connection. As soon as I am more than 2-3 meters away from any window both me and the person who called me cannot hear each other anymore. Probably the walls are made of a lot of reinforced concrete which creates interference. I wonder if there's any possibility to forward incoming calls to my landline phone whenever I am connected to the wifi in my house?

I read this article and came upon the app Call Divert but it seems that this app is full of ads. Is there any open source solution that does the same thing?


问:
Download/Fastboot Mode Broken
I have the Samsung J5 Pro (SM-J530F).

Two years ago I installed TWRP via Odin and download mode and it worked great. Since then I never entered download mode again because I installed all my roms with TWRP.

Now, I am trying to enter download mode in order to install my original Android 9 (from Sam-Mobile),  through Odin, and it's not working, like the download mode has been deleted somehow...

I tried every possible way, with the bottoms (power, volume down and home), through TWRP, with ADB but it is not working!!

If you have any suggestions, I would like to hear...

Thank you in advance

Title: Download/Fastboot Mode Broken


问:
Upgrade HCL ME V1 tablet to make it usable again
I have HCL ME V1 tablet :

preinstalled with Android 4.0.4 (Ice-cream Sandwich) OS.

It has 4GB of internal SD memory

1GB DDR3 RAM and

1 GHz, Cortex A8 processor

It used to work fine when I had bought it, but with time, the device is becoming quite unusable in the sense that the android os is quite old and there was no update from the manufacturer.

Moreover it has no playstore. Which was not a problem previously as I could manually download the apks from third party sites and just install them on the device, it used to work fine. But recently I see all the newer apks show "there was a problem while parsing" and technically it is becoming unusable. All the older browsers in it show incompatibility errors when I try to load a web page.

Moreover, I cannot install any apps from Google like Chrome, Youtube etc.

So could you suggest me a step by step detailed guide as to how I can revive the device, with some newer android os (installing manually) or some other lightweight os which could be installed on that device or someway as to how I could install Google Play on it.

I too have a smart phone with a similar hardware configuration, which supports Android 9 without much issues. Please could anyone help me, with a detailed step by step guide.


问:
How do I connect an external WiFi device to the USB port of my Android phone?
I cannot find any android drivers that will allow me to connect an external WiFi thumb drive to the USB port of my phone. Then I intend to interface to the USB through the external WiFi device using WiFi Direct.  I do not want to root my phone so does anyone know of a way to connect these devices?</p>


问:
Chrome's "share to device" and "click to call" keep sending to the wrong phone
I have 2 Android devices of the same brand and model, one is for gaming and such and has no SIM card, the other one is my main phone with the SIM card and able to make a phone call.

I discovered this very useful "share to device" and "click to call" function as it sends to the correct phone each time. However, since yesterday, whenever I try to do it, it keeps sending it to the other wrong phone. And I seem to have no control whatsoever on which phone to select for the desktop Chrome to send to.

When I click "send to your device", only that one option shows up and it keeps sending to the wrong phone.

I did not change any settings on my Android phones. All sync and notification have been enabled.

Is there a way to show and choose the target device?


问:
Android phone doesn't start, screen black
So yesterday i picked my phone up from my pocket, the screen was on but just black, and it was blinking (guessing around 7 seconds of, 7 seconds black). After a few hours of doing this, it sounded like it turned on or off, but nothing had changed. It was still just blinking. I also tried holding the power button for at least 2 minutes but nothing. Next change happened at half past eleven where it again sounded like it had turned on/off. But this time when i hold the power button, it sounded like it turned on, and after that i could turn the screen on or off, but it was still just black. Next morning, when pressing the power button, it turned "on" i could switch the screen on/off, and after 5 minutes it shut itself down again. This happened again. When i turn it on, it doesn't display the right splash screen, rather just black like usual.

Upon plugging it into a computer with android studio installed, and running adb devices, it doesn't show up (haven't tested while it is in the mode where i can control the screen since i haven't got access to a computer that has as rn, will update once i tested it). Right now i am trying to discharge it completely and see what happens when i charge it and turn it on. After it being discharged, i can turn it on, it seems to boot up like normal, taking the normal amount of time, but without image. After that i can turn on and off the screen, it also turns itself off after awhile like normal. After about 15sec to 5 minutes it then shuts itself down completely again

Earlier that day, i had just browsed some twitter, and tested a react native app. One thing that i did do was clean it in the sink, but it is a IP68 phone, the rubber around the corners have started becoming a bit loose, but the actual phone seems to be encased in an inner hard plastic shell. It's a lower end device from china, a Nomu S10 Pro to be specific, which i've had since Aug 2018.

Could it be the screen that is dead?

Update

i'm pretty certain the screen is dead, i plugged it into my PC, remembered the Microsoft Your Phone/Phone companion or whatever, and i could send messages, i could even view photos, so i took a screenshot, and it showed up. :(


问:
Device not booting and not allowed me to unlock boot loader
Everytime I try to boot the device HTC Desire 728 I am getting a white screen with

```<code>*** Software status: Modified ***
*** Locked ***
HTC_AS0CML 128 SHIP S-ON
*** Security Warning ***
CID-HTC__J15
LK-1.01.0000
OS-1.36.401.4

VOL Up to previous item
VOL Down to next item
Power Key to select item

REBOOT
REBOOT TO BOOT-LOADER
BOOT TO DOWNLOAD MODE
BOOT TO RECOVERY MODE
POWER DOWN
</code>```

Tried Booting into recovery and selecting "wipe data and factory reset" but still the same problem.

Tried to fastboot boot .. but it says

```<code>FAILED (remote: 'download for partition 'unlocktoken' is not allowed')
fastboot: error: Command failed
</code>```

I searched the web and found that I must first unlock bootloader (see this link) But however my device is locked and I cannot even boot it to enable "Developer Mode" and "Enable OEM Unlock" options from settings.

Can you suggest what to do?


问:
App getting crashed even if no modification done to the code and the stack trace is same as the repackaged version of original app
My question is related to the repackaging of a mobile app. This app uses v1 signing scheme and I did the following:

I fetched the apk file from the playstore using adb and I signed with my keystore using apksigner. Now, when I launch this app on my smartphone, it is showing the following exception.

I took the original apk, I change the format to *.zip and unzipped it, and then again, converted back to apk and I  applied zipalign on the apk. The apk gets successfully installed on the smartphone but when I launch this app, I am getting the following exception.

In this scenario, I didn't modify any file. In the past, I have done this same process for few app's apk and the app is running successfully.

If you observe the above two exception's image, the 1st three lines are same.

My doubt is:

Irrespective of the signature change, we are getting the same
exception (atleast the 1st three lines). What can be the reasons
regarding the same? (Also, I have used the zipalign for the proper
alignment)

Which type of framework this app is using such that even without changing the source code, the app is getting crashed?

Any help/inputs regarding this domain is highly appreciated.


问:
Wifi stops working at random
I have a Galaxy S20, which is having a problem with wireless networks (for around a week, maybe a few days more). It will always connect to them fine, but after a certain (somewhat random) amount of time, it will lose network connectivity but still appear to be connected. Sometimes an exclamation mark appears on the icon, sometimes not.

In either case, disabling and then reenabling wifi will fix it, until it drops out again, usually a few minutes later but could be hours later.

I have tested both with my main wireless network (using UniFi APs) and also with an old dd-wrt AP I had lying around. It has the same problem on both although if anything seems to happen more on my main network with much better APs, as well as happening more when I'm actively using the phone rather than just watching a ping command. APs (for my main network, anyway) are running latest firmware, on the best channels (currently 6 and 1) but I have tested other channels. Network is performing fine, DHCP and DNS working properly, etc. DHCP lease time is 12 hours with a static mapping for the phone so I know it's not expiring and failing to renew.

In the logs for the UniFi APs, I get a lot of log entries like this, but search results for them are generally useless:

```<code>Dec 14 21:03:32 unifi-1.***** user U7PG2,fcecdaa379ba,v4.3.24.11355: : mcad[19924]: wireless_agg_stats.log_sta_anomalies(): bssid=fc:ec:**:**:**:** radio=wifi0 vap=ath0 sta=58:d5:**:**:**:** satisfaction_now=73 anomalies=tcp_latency
Dec 14 21:03:50 unifi-1.***** user U7PG2,fcecdaa379ba,v4.3.24.11355: : mcad[19924]: wireless_agg_stats.log_sta_anomalies(): bssid=fc:ec:**:**:**:** radio=wifi0 vap=ath0 sta=58:d5:**:**:**:** satisfaction_now=73 anomalies=tcp_latency
</code>```

When I run a ping to an address on the local network, it works for a while, then stops receiving the replies. Meanwhile, if I ping the phone's IP from a computer, I see a corresponding sudden loss of all packets to the phone (Destination Host Unreachable). The same problem does not occur for any other wireless devices (phones, tablets, or laptops) and happens whether the phone is charging or on battery.

Any idea why this happens or on any fixes? I can do ADB if needed but not sure what to do for diagnostics as android's network tools are fairly limited.

Model: SM-G981U1

Android version: 10

Patch level: 1 Nov 2020

Kernel: 4.19.81-19654513 #2

Edit: Have kept fiddling with different wireless networks, still having the problem. I have also noticed that if I go into the wifi menu, that is enough to cause it to reconnect and start passing traffic again even if I don't disable/reenable it.

Title: Wifi stops working at random


问:
How do I get rid of the many sticky notices about my hotspot with tethering?
I'm using a smartphone as a WiFi hotspot - and connecting a PC to it with a USB cable. As I plug the cable in, I get a first notification bubble:

USB debugging is on

Tap to turn off USB debugging

I don't want to get this every time I connect!... and even if I do - at least I want to be able to swipe it away. No such luck.

Now, I turn on the hotspot. This gives me two more notifications:

Tethering or hotspot active

0 connected devices

Tethering or hotspot active

Tap to set up.

then I turn on USB tethering (which I also don't understand why I can't get to default to on); that yields another notification:

USB tethering is on

Tap for more options.

So, four different notifications, none of which I can swipe away.

What can I do to:

Make them swipeable-away?

Make it so that they don't show up in the first place, or at least

Make it so that they disappear a short while after appearing?

Notes:

My phone is a Xiaomi 9 SE, running MIUI 12.0.2, that's based on Android 10 QKQ1.


问:
I Can't Change Album Art On Three Songs By One Artist
I tried everything, even reformatting the phone. I never had this problem before.
The album art shows up properly on my computer.

New: I copied the songs from another phone, each song had the same profile pictures like it should, but it was still in two albums like before. When I moved the files from phone storage to the SD card via phone, the 3 songs went back to black album art and and it is still in two albums.


问:
Microphone does not work when speaker is on
So, for a few days I have been having problems with my microphone on video call or call with loudspeakers. I tried Whatsapp video call, Whatsapp voice call with loudspeaker, Zoom, and Google Meet and the problems are same: my voice cannot go through, while I can hear other people's voice.
I tried using mic checker app and both my microphones are fine. I also have tried recording video and audio and they both work just fine.
I also have checked the applications' permission and they do have permission to use my microphone.

Last time, I tried zoom meeting, and muted my speaker, and my voice went through. However, when I turn on my speaker again, my mic cannot pick up any sound.

Is there a way I can fix this so that my speaker and my mic can be on at the same time?


问:
Help me to Unlock Bootloader on this Chinese phone
I am trying to unlock the bootloader for my device (it's a cheap Chinese phone) and then root using Magisk. The first problem is that OEM Unlock option is not available in developer options, so I got no choice other than try unlocking using fastboot. Now the second problem is that fastboot doesn't show anything at all. Normally there is a Fastboot written at the top left corner of the device but in my case there is no output but the blank screen, and I do verify that my device is in fastboot mode because when I do fastboot devices, it show's the output:

```<code>C:\Users\Mujtaba>adb devices
List of devices attached
Y3123A0310Q0100020953   device

C:\Users\Mujtaba>adb reboot bootloader

C:\Users\Mujtaba>fastboot devices
Y3123A0310Q01000209     fastboot
</code>```

Since fastboot is responding, I tried to unlock the bootloader using different commands but each time I get read/write failed error.

```<code>C:\Users\Mujtaba>fastboot oem unlock
...
FAILED (command write failed (Unknown error))
finished. total time: 5.011s

C:\Users\Mujtaba>fastboot oem unlock
...
FAILED (status read failed (Too many links))
finished. total time: 80.886s
</code>```

Alas, I got the same results with fastboot oem unlock-go and fastboot flashing unlock as fastboot is not picking up (at least I think) any command except for fastboot devices.

I read the official guide and there I found that:

Devices should deny the fastboot flashing unlock command unless the
get_unlock_ability is set to 1. If set to 0, the user needs to boot to
the home screen, open the Settings > System > Developer options menu
and enable the OEM unlocking option (which sets the unlock_ability to
1).

My device supports unlocking bootloader because I've checked the build.prop file using adb shell getprop and it includes the properties stated below:

The ro.oem_unlock_supported property should be set at build time based
on whether the device supports flashing unlock.

If the device suppports flashing unlock, set ro.oem_unlock_supported
to 1. If the device doesn't support flashing unlock, set
ro.oem_unlock_supported to 0. If the device supports flashing unlock,
then the bootloader should indicate the lock status by setting the
kernel command line variable androidboot.flash.locked to 1 if locked
or 0 if unlocked.

For devices that support dm-verity, use ro.boot.verifiedbootstate to
set the value of ro.boot.flash.locked to 0; this unlocks the
bootloader if the verified boot state is orange.

```<code>C:\Users\Mujtaba>adb shell getprop
[ro.oem_unlock_supported]: [1]
[ro.boot.verifiedbootstate]: [green]
[ro.boot.flash.locked]: [1]
[sys.oem_unlock_allowed]: [0]
.
.
</code>```

Someone on reddit did this to find the OEM unlock state, mine of course returned 0 as you can see above.

```<code>adb shell getprop sys.oem_unlock_allowed
</code>```

Device Specs:

CPU: ARM Cortex-A-7 @ 1.20 Ghz

GPU: Mali-400 MP

Board: sp7731cea (Unisoc aka Spreadtrum)

Build: Q Infinity C_MP_26_01

Treble: NA

Seamless update (A/B): NA

So long story short, I'm still unable to unlock the bootloader so any help would be very helpful guys. Thanks


问:
WhatsApp overrides do not disturb
Android 7. A contact accidentally initiated a video call at 04.58 and my phone briefly let out a notification ( brief as I'd guess she presumably killed the call pronto?). I've just double checked and Do not disturb is set to prevent all apps' notifications at night, including WhatsApp.
Any ideas as to what happened? How I can prevent this again?</p>

Title: WhatsApp overrides do not disturb


问:
Another Without-Unlock Backup Question: (Temporarily) Booting a Recovery?
There was a nice thorough discussion of backups for non-rooted (and maybe also locked) devices here.  Most of that covered Android 4.x+ because of the use of adb backup, which apparently doesn't exist in prior versions.  A second question on backing up 2.3.x under the same conditions, found no answers.

I'm am dealing with Honeycomb 3.2.6, which I have not yet unlocked, and I am considering the last answer at the first link.  I am considering if there is a way to, possibly temporarily, boot a recovery to do the backup.  I can see three possibilities:

(1) That answer suggests connecting via USB with Debugging enabled and then:

```<code>abd reboot bootloader
fastboot boot twrp.img
fastboot reboot
</code>```

As opposed to fastboot flash recovery twrp.img, that should temporarily boot the twrp.img without changing/wiping /data.  From there it should be possible to do a nandroid backup to an SDCard.  The author of that idea didn't seem to have tried it themselves.  I wonder if anyone has, and if it's likely to work as described.

(2) According to the TWRP website for this device, if I fastboot flash recovery twrp.img and then on reboot press the proper key combination to enter the recovery (in this case power+volume-down), then

Note many devices will replace your custom recovery automatically
during first boot. To prevent this, ... find the proper key combo to
enter recovery. After typing fastboot reboot, hold the key combo and
boot to TWRP. Once TWRP is booted, TWRP will patch the stock ROM to
prevent the stock ROM from replacing TWRP. If you don't follow this
step, you will have to repeat the install.

Is this true for TWRP on all/most/many devices?

(3) Another approach to temporarily booting a recovery, mentioned in one of the comments at that first link, is to boot one off of an SDCard.  I found one example in another device I have.  I'm wondering under what conditions that might work and how to arrange it?  If anyone has any insight, I would also appreciate them.


问:
Does Android perform cold app startup optimization?
I am trying to measure the time it takes to launch an App (cold startup) on Android.

As the official documentation states, that the startup time will be displayed in the logcat:

```<code>ActivityManager: Displayed com.android.myexample/.StartupTiming: +3s534ms
</code>```

The problem I currently have is that startup times vary greatly. I tested on three different days à 10 times. These are the results:

Day 1:

~1100ms

Day 2:

~900ms

Day 3:

~350ms

My Question:

Does Android perform any optimization in the background for the App startup? Is there a way to reliably measure the startup time?

I haven't done any changes to the App in these three days. Before the testing, the phone was at 100% battery capacity and was cold to the touch (to eliminate the possibility of thermal throttling).

On day 2 and 3, I deleted the App, restarted the phone, reinstalled the App and tested again with the same results (day 2 was again ~900ms and on day 3: ~350ms).

Maybe it has something to do with the ART (Android RunTime) using JIT (just-in-time) and AOT (ahead-of-time) compiler?!

The app does not perform any network actions. At startup it only ready about 100 pictures from the internal storage and displays them in a Recycler View.

I used a Google Pixel 2 running on Android 9. The app is written in Java.


问:
Incorrect "Google Maps" section in Gmail contact
My contact suddenly has a new section titled "Google Maps" and this section shows information for a random business located in another state (this "Google Maps" section is between "Contact details" and "Google profile".

When I click on a link icon within this section, it takes me to the Maps listing for this business. AS far as I can tell, there is nothing in there that could possibly link my contact to it.

It's important for me to fix this because I have a business and this messes with my local SEO. Thanks in advance for any help.


问:
Is it possible to connect to a WiFi network using the router's MAC address and not the broadcasted SSID on Android?
Assuming that there are many hotspots broadcasting the same SSID, is it possible to "force" my Android phone to connect to a specific network by using a unique identifier, for example the MAC address of the broadcasting router?

What I'm looking for is a solution without the need of third party software. I'm currently using Android 10 on Xiaomi MIUI 12, but I'm open to hear any answer including other Android versions or mobile manufacturers.


问:
GBoard app: Initializing of voice-to-text takes forever
I use GBoard on my Poco X3 and the keyboard sporadically takes forever to initialize when using Voice Typing. Sometimes it's fast, sometimes it isnt. Sometimes it shows "initializing" and than aborts - sometimes it goes over into speech-recognition mode. Very unreliable :(

Not sure why... Occurs on Wifi, as well as on mobile data connection. Havent found a way to reproduce it reliably.

Any ideas why?
Latest updates installed. Cache already cleared.
Different things tried, nothing yet worked :(

Thanks!


问:
Recover OPPO A9 2020 (Android 10) from forgotten PIN(6 digits => 1000000 probability)
I have tried more tools to recover oppo A9 2020 (Model CPH1937; patch: oct,2020; Android Version: Android 10; ColorOs Version: 7) from the forgotten PIN. I'm using Snapdragon 665 device. Since I couldn't get FRP unlocking tool, I have tried to wipe device or atleast reset /data to recover OPPO A9 2020. In anyway (either wiping or recovering) how can i recover by tools without BOX?.
I recognished, EDL mode is the only way to recover phone from PIN.

Tried ways,

Tried to build brute-force machine.

I know 6 digit PIN protection is not big deal to predict the right PIN among 10,00,000 numbers. (10 lack numbers from 000000 to 999999).

 Enter PIN

  ......

   1 2 3       // This is the structure and prediction rate for any single try (1/1000000)100 => (probability100)%

   4 5 6       // If Android accept keyboard even from lock screen it will be possible.

   7 8 9       // 8279 programmable keyboard or 8051 controller will be the brute-force machine.

     0        // I recognished using emergency call type *#899# (Works in Oppo A9 2020) -> manual test -> last title panel (on topbar) write/read log -> It will asks for PIN (safest way to try PINs it won't show timer after certain attempts you can try infinite times using programmable keyboard). note: It won't Erase your data and applications. You don't need to spend more internet packs, It is the best method to find old "PIN". You can unlock your phone with this. Not best for password, I don't know about pattern .

I'm 100% sure, It will work. "If your android can recognize keyboard in lock screen and if has secret log write option"

chip not available in my district shops. But available in online shopping(use trusted shopping sites). The dare is, I don't have mobile to use mobile banking now to work with above option.

Wipe mobile via Google account phone recovery (find my device),

=> Mobile internet and location service both were turned on but google find my device didn't detect mobile after phone locked.

Used MSM Download tool to recover device (Stock ROM + setup file = 6.5Gb).

=> Mobile didn't responds to windows after 15 seconds of EDL mode. Prompts(log, message or whatever) to restart device(every time after 15 seconds).

Asked(via call) oppo store to help.

=> Oppo store not present in my district to go :-(.

Given to service center,

=> Again refered OPPO Store :-(.

Used QFil (Python and linux) it seems to be work.

=> There is no clear command list for repartitioning using .img file. How to use QFil?

=> Signature verification failed even for Stock ROM. notable: I don't even tried to flash custom ROM and OPPO A9 2020 has almost all feature ie. Dolby, HIGH performance mode(Game Boost), floating window apps(*supported Apps), Dark Mode, Custom snapshot, OPPO secure storage(CHIP level encryption), Recovery Mode Encryption(This is why I can't wipe my device via Recovery :-(. ),...etc.

Used QFil(Prebuild GUI Application) in windows.

=> Sahara protocol Error => Read 0 bit header in Rx (Fixes more annoying and not available).

=> Respose timeout

**Used QDL tool for linux from these channels,

Via snap package manager

Via Official git source code repository

Prebuild download**

=> Starts to work (from the debug log). But not writing (and still stuck there before writing into port(ttyUSB0))

```<code>qdl --storage ufs --include path/to/image/ prog_firehose_ddr_ufs.elf rawprogram0_ufs.xml patch0_ufs.xml
</code>```

To point snap,

```<code>/snap/bin/qdl --storage ufs --include path/to/image/ prog_firehose_ddr_ufs.elf rawprogram0_ufs.xml patch0_ufs.xml
</code>```

To point current(git cloned directory) working directory("."),

```<code>./qdl --storage ufs --include path/to/image/ prog_firehose_ddr_ufs.elf rawprogram0_ufs.xml patch0_ufs.xml
</code>```

After the installation of prebuild(downloaded) from internet,

```<code>$ which qdl
/usr/bin/qdl  <= pointing 'make install'/apt/dpkg/yum/pacman/... installation
$ qdl --storage ufs --include path/to/image/ prog_firehose_ddr_ufs.elf rawprogram0_ufs.xml patch0_ufs.xml
</code>```

Result does not have any error and stucks after displaying details about device(ventor id, product id, device id, ...etc).

Tried EDL tool(edl.py) available with QFil(Python, [used Linux] CLI no-GUI),

Used following command to format userdata partition,

```<code>$ python edl.py --debug --memory ufs --loader ../extracted/prog_firehose_ddr_ufs.elf r userdata userdata.img
</code>```

The error result was,

```<code>No such volume named 'userdata'
</code>```

***I'm proved to have such secure device(Just lol).

How to remove PIN in mobile with/without wiping whole data?.

If can, How to unlock using FRP method?.

Any methods available without opening device body and without Box?.

Any kind of suggestion, which you can give?.***

I only used these commands in these(above) tools, If you know tool usage or methods or new tools please kindly share to help people and for me too.


问:
Hosting a hotspot without signaling metered connection
Currently, I am running a hotspot from an Android phone as my home network. The cellular plan for this phone has unlimited data.

When I host the hotspot, connected devices detect that this hotspot has a cellular connection behind it, and treats it as a cellular connection. This, for example, limits connected Android phones to not back up photos via Google Photos if the "back up over cellular data" option isn't enabled.

Can I somehow edit the way the hotspot is being run, so that it doesn't signal to connected devices that there is a cellular connection in the background?

The hosting phone is rooted, and I have no trouble using a terminal-based setup (with hostapd or similar)

EDIT:
Additional information:

```<code> raphael:/ # netstat -lntup | grep -E ':53|:67'
tcp        0      0 127.0.0.1:53            0.0.0.0:*               LISTEN      22525/dnsmasq
tcp        0      0 192.168.166.70:53       0.0.0.0:*               LISTEN      22525/dnsmasq
tcp6       0      0 2a00:801:237:80f8::c:53 :::*                    LISTEN      22525/dnsmasq
tcp6       0      0 ::1:53                  :::*                    LISTEN      22525/dnsmasq
udp        0      0 0.0.0.0:5353            0.0.0.0:*                           17668/mdnsd
udp        0      0 127.0.0.1:53            0.0.0.0:*                           22525/dnsmasq
udp        0      0 192.168.166.70:53       0.0.0.0:*                           22525/dnsmasq
udp        0      0 0.0.0.0:67              0.0.0.0:*                           2243/com.android.networkstack.process
udp6       0      0 :::5353                 :::*                                17668/mdnsd
udp6       0      0 :::5353                 :::*                                17668/mdnsd
udp6       0      0 2a00:801:237:80f8::c:53 :::*                                22525/dnsmasq
udp6       0      0 ::1:53                  :::*                                22525/dnsmasq

raphael:/ # cat /proc/22525/cmdline
/system/bin/dnsmasq--keep-in-foreground--no-resolv--no-poll--dhcp-authoritative--dhcp-option-force=43,ANDROID_METERED--pid
</code>```


问:
Reading battery level/voltage via USB port
I'm interested in creating a device that needs to externally monitor the battery level or voltage of the phone via the USB port. I haven't had much experience with the inner workings of Android, but I do know that apps have access to the battery manager, but I'm wondering if, during charging, is it possible to obtain data (at least the voltage reading) about the battery via USB without having to install/create an app that reads and sends the data?


问:
How to convert a number to words in MS Excel Android app automatically?
Excel macros are unsupported in Android and there is also no SpellNum function. I want a function which can convert a number to words.

Also, I am unable to find any relevant ways of doing so in the Google Sheets Android app.

Is there any way we can achieve this?

OwnerDisplayName: RAHUL JAISWAL


问:
Samsung Galaxy S3 Keeps shutting off
I just recently found an old Samsung phone and I have been trying to get it to boot up. I have some old pictures of my kids on there I would love to get off of it. The phone tries to boot up but as soon as it gets to the Galaxy S3 logo it shuts down. I charged the battery and it works fine (checked it with another S3) I tried the Power button, volume down, home button and it gets to the point where I can choose to reset the phone and it goes to the android logo then shuts down. The volume up option shows that it begins the boot recovery but then it shuts down. Any ideas? It had become my mission to figure this out, but it is looking like it might be a lost cause.</p>

Title: Samsung Galaxy S3 Keeps shutting off


问:
Restore contacts from VCF to SIM Card
I've been trying to restore contacts from a vCard backup I have (VCF file) to the SIM card.

So far I managed to do it, but only through an app called "Simple contacts - Easy contact manager" (https://play.google.com/store/apps/details?id=com.simplemanage.contactsapp&hl=en_US&gl=US). From there, I can click Import from VCF file and it will have the option to select the SIM card "account". When I try from the Contacts app, no such "account" appears, and I can only select PHONE or Google Account. So I think the app enables the option from the Contacts app, which might be locked because of any non-sense reason (unless it's because of what I'll say in a bit, and if it is, I'd like to know why they didn't fix it...). When I try to do this, all contacts are restored perfectly with absolutely no errors. Though, after a restart, all are gone from the SIM card. No trace. No explanation also...

From another idea, I've also not found another app that imports from VCF to the SIM card directly, so I restored to the phone (perfect restoration) and copied to the SIM card. This ended up in one of 2 ways only: either the names would be incomplete many when there are special characters on them (it would cut them for some reaason), or it would still cut the names, but less times and only with one app which I don't remember anymore because I've been trying various (if needed I can look for it).

In some cases, they will be shown perfectly on the app that copied them, but when I open the Contacts app, their names will be cut.

Since it seems to have to do with special characters, I've thought in being related with encodings (the encoding used on the phone memory). A wrong encoding could be taking too much space for the SIM card to store or something, but no idea, just came to my mind.

Does anyone know a decent way of restoring the contacts to the SIM card...? I don't want to be forced to go get my Nokia Navigator or another one even older I have from 2008 (the Navigator at least I know it can do this because I used to do it, the other one I'm not sure) to do something an Android phone (much more recent and more powerful) can't and should be able to do, every time from now on.

Thanks in advance for any help!

Title: Restore contacts from VCF to SIM Card


问:
How do I exclude songs from being ring-tones/notification tones?
So, I have amassed quite a collection of music on my phone, which runs Android 4.1 (yes, I know this is old… the phone works better than many newer devices)… about 3300 odd tracks.

I also have 3 files that have been on the SD card (actually, on a previous card, and they've been migrated from card to card for the past 8 years or so) which I actually wish to use as ringtones.  They're in MP3 format (in contrast to my music which is in Ogg/Vorbis format).

/sdcard0/music is where my music is being kept.

/sdcard0/ringtones is where my ringtones are being kept.

How do I exclude /sdcard0/music from being "seen" by the ring-tone selection screens, whilst still permitting the files therein to be "seen" by media players?  (Using features native to Android 4.1 please, NO THIRD PARTY APPLICATIONS.  Due to this device's age, I do not have Google Play Store available.  So this solution won't work for me as I can't install software from Google Play store.)

Reply to the comments:

The solution there in the link, have you tried it?

No, because I specifically stated NO THIRD PARTY APPLICATIONS.  I'm looking for a solution that uses the features shipped with Android 4.1.

Create a folder and place those files in it. In the same folder create .nomedia…

Kindly read the question again.  That excludes the files from everything, media players included.  I only want to exclude these files from notifications/ringtones.  I have a media program that excludes the ring-tones from the playlist, that's a solved problem, and NOT what I asked about.


问:
ADB Device Unauthorized - Locked out Samsung S9 - USB Debugging is On, but locked out of the verification pop-up
I locked myself out of my Samsung Galaxy S9.  I genuinely just forgot my gesture swipe lock, and my phone must have restarted overnight, so I couldn't use my fingerprint.

USB Debugging is On

I have ADB up and running on my PC

/adb devices brings back my phone as 'unauthorized'

I cannot get through my lock screen, so I am unable to allow access on the pop-up on my phone.

Phone is not rooted, no custom recovery

Hopefully someone can help, I really don't want to have to factory reset.


问:
Reboot loop for Moto Z2
Recently my moto z2 play stuck in "reboot loop".

I couldn't able to move further due to "Developer option" was not enabled. I've tried the following methods, but no luck 0 still the restart is persistence

Tried "Restart Bootloader", and from PC done fastboot to wipe the User Data / Cache

Tried to enter "Recovery mode", no luck

Do we've any work around to get it fixed, as I don't want to waste the hardware resource

Title: Reboot loop for Moto Z2


问:
How to insert a recovery and root in HTC Desire 820 Dual Sim?
I want to insert a custom ROM in HTC Desire 820 dual sim. I have unlocked the bootloader and tried to insert a TWRP recovery. I have tried multiple recoveries namely:

HTC_A51_TWRP_Recovery_3.0.2-0_htcui

HTC_D820_TWRP-Recovery-2.8.7.0-en

HTC_TWRP_Recovery_All

recovery.iso

twrp-3.0.2-0-a32e

twrp-3.1.1-0-a5

twrp-3.2.2-0-a51cml_tuhl

While trying to flash these Unfortunately I Corrupted the OS. The first four of the above TWRP either won't get flashed due to

```<code>target reported max download size of 16777216 bytes
Invalid sparse file format at header magi
error: write_sparse_skip_chunk: don't care size 5736448 is not a multiple of the block size 4096
sending sparse 'recovery' (16382 KB)...
error: write_sparse_skip_chunk: don't care size 5736448 is not a multiple of the block size 4096
error: write_sparse_skip_chunk: don't care size 5736448 is not a multiple of the block size 4096
OKAY [  1.673s]
writing 'recovery'...
FAILED (remote: image error! (BootMagic check fail))
finished. total time: 1.689s
</code>```

The other 2 flashed but when Executed the command fasboot boot twrp-3.0.2-0-a32e.img or the one with a5 the error is

```<code>downloading 'boot.img'...
OKAY [  1.356s]
booting...
FAILED (remote: dtb not found)
finished. total time: 1.356s
</code>```

the last didn't give any error but doesn't work either( possibly because its a Desire 830 .img but its the only one not giving the error

the phone is (or was) android 6.0.1

```<code>A51_DTUL PVT SHIP S-ON
HBOOT-3.19.0.0000
RADIO-01.01.010_U10305041_08.01.51015
OS-3.17.720.3
eMMC-boot 2048MB
Apr 11 2016,21:16:51.0
</code>```

It doesn't have an OEM unlock and I'm pretty much new to recovery and root stuff. Please suggest me how can I root this device too, so I don't fall into further problems. Thanks in advance :)


问:
How secure is your data in Android when an app is given access to storage, camera, contacts
I am just trying to understand that, these days most of the apps require access to things like camera, storage, contacts.

Is there any data privacy link to read through for an app consumer to know what is all that an app is doing in your background, in simple English so that a non-tech person can also understand the effects

I see some apps, like a fitness apps, asking for camera access, and allow access to make calls, cannot join the dots like why does it require camera access and asking for permission to make calls. I'm sure there must be scan/check when an app is uploaded to Playstore, but is this point checked like why a fitness app is asking permission to make calls or camera access.

I am sure given an app, the app devs know exactly what all does the app does with all access permission in hand. Isn't it creepy sometimes from a consumer point of view.

A little I know is some apps collect our data and just sell it

Any online document link on privacy policy, data collection given an app, could help understand in detail. Could anyone throw some light or thoughts on app consumers data security in Android


问:
WiFi Error: “Failed to connect to network” - Google Pixel 3xl, Android 11
My Google Pixel 3XL was working perfectly fine and now it refuses to connect to wifi. It just says "Failed to connect to network" whenever and however I try.

I'm not running a custom ROM.
I have not installed anything new since it was working - it was working fine and then it wasn't
I haven't physically damaged my phone, wifi seems to be the only thing effected, all other functions are normal as far as I can see

Here is everything I've tried:

I've checked that the wifi router works by testing it with other devices.
I've tried connecting to new SSIDs that the phone has never met before
I've tried conneting in safe mode
I've installed the latest updates to my phone and tried again

This old question suggests that I delete a wifi config file: WiFi Error: "Failed to connect to network" I cant access that file, probably because I'm not root. So that is probably not going to happen.

The next thing to try is a factory reset. But I really really want to avoid that.

Do any of you have anything else I can try?


问:
Moisture detection when connecting external hard-drive to tablet
I have a Fire HD 10 Tablet with android in it and i'm trying to use external USB (like storage or mouse) but when i plug the tablet to an USB-Hub connected to a SD Card it reads it for about 10 seconds and then throws the message "Moisture/Water detected, please unplug the USB".
The thing is i tried this with another tablet and it's the same.
However, i tried with my PC and it works fine, so the problem can't come from the USB-Hub or the SD Card.

Any suggestions how i can solve this?
(I know it's more a hardware topic here, but maybe the problem can come from software too?)


问:
Android Navigation Buttons Not Touchable On Top
My navigation buttons are not touchable at the top of them, just above their icons. I recorded a video of this issue, but it's too large to upload here, so I put it on YouTube. (https://youtu.be/q43QheBsSnI) I have the Show Pointer Location setting on so if you maximize the video, you can see where I'm tapping at the bottom. Does anyone know how I can fix this issue? I've tried restarting, searching the internet for people experiencing similar issues, and digging through my phone's settings.</p>