问:
TWRP asking for a password when one is not set
My smartphone is the original Google Pixel. The bootloader on this device is unlocked. A week or so ago, I decided to boot into TWRP to do some stuff with my data. Before booting into it the first time, I removed my unlock pattern because I didn't know how I'd go about entering an unlock pattern in TWRP. After booting into TWRP the first time and then booting back into normal Android, I set my unlock pattern, I think, and then I removed it again. Afterwards, I was unable to (and I am still unable to) set a screen lock password/PIN/pattern. I'm pretty sure this is tied into this problem.

The first time that I booted into TWRP, it did NOT ask for a decryption pattern; I think I was able to see files inside directories like /data/user/0. Right now, when I boot into TWRP, it asks me for my password in order to decrypt. The only problem with that is that I don't have a password  set. When Android boots up, I'm not asked for a PIN, a password, or a pattern, and I can see all of my contacts, files, applications, and so on.

Are my inability to set a password in Settings and TWRP asking for a password to decrypt folders like /data/user/0 (TWRP doesn't actually mention any directories) linked? How can I fix this?

These solutions are not acceptable:

Performing a factory reset.

Anything having to do with syncing with Google.


问:
How to cancel delay before taking picture on Open Camera app?
I am using Open Camera (latest version), and there is a delay of about ten seconds between pushing the button and the picture being taken. I also noticed that the flash is pulsing during those 10 seconds.

Of course, I have checked the settings and set "delay" to "none", but still this behavior persists.

Before I uninstall & re-install, wiping my settings, which I am loth to do, does anyone of any other setting which that might be causing this?

OwnerDisplayName: Mawg

ContentLicense: CC BY-SA 4.0


问:
How exactly does FBE's key derivation work?
These are the files that I know go into verifying a user's password:

```<code>/data/system/gatekeeper.password.key
/data/system/gatekeeper.pattern.key
/data/system/locksettings.db
/data/system/locksettings.db-shm
/data/system/locksettings.db-wal
</code>```

I know that this is where the files used construct the FBE key are stored:

```<code>/data/misc/vold/user_keys/ce/0/current/version
/data/misc/vold/user_keys/ce/0/current/secdiscardable
/data/misc/vold/user_keys/ce/0/current/encrypted_key
/data/misc/vold/user_keys/ce/0/current/stretching
/data/misc/vold/user_keys/de/0/encrypted_key
/data/misc/vold/user_keys/de/0/stretching
/data/misc/vold/user_keys/de/0/keymaster_key_blob
/data/misc/vold/user_keys/de/0/secdiscardable
/data/misc/vold/user_keys/de/0/version
</code>```

Although I'm told the encrypted FBE keys are stored in the above paths, these files seem related:

```<code>/data/system_de/0/spblob/0000000000000000.handle
/data/system_de/0/spblob/XXXXXXXXXXXXXXXX.pwd
/data/system_de/0/spblob/XXXXXXXXXXXXXXXX.secdis
/data/system_de/0/spblob/XXXXXXXXXXXXXXXX.spblob
</code>```

The XXXXXXXXXXXXXXXX is a placeholder for a 16-character long hexadecimal "handle"; 0000000000000000.handle, by contrast, is named exactly as it written. There are actually several sets of pwd/secdis/spblob files on my phone and two that are missing their spblob file. I'm not sure I'm supposed to have that many.

Over the pass few days, I've messed up my phone trying to get TWRP to decrypt my data. At first, after removing my password, I couldn't set another one as Settings would crash whenever I tried. I was able to fix it by renaming locksettings.db. I then went ahead and set and cleared several different (but very insecure) passwords/PINs, including my old one (which is secure). I'm unable to remember the order of events, but now I'm at a point where I get Pixel is starting whenever I swipe on my home screen after booting. I'm suspecting this has to do with it not being able to decrypt my FBE key. I'm wondering if through my combination of renaming files like gatekeeper.*.key and locksettings.db that the FBE key maybe was decrypted with the wrong key and then reencrypted with a different one.

I'd like to know what role the above files play in the encrypting my phone. I'd also like to know:

What data from what sources is combined using what algorithms to decrypt the keys that encrypt my phone.

What happens when the password is changed (e.g., what files are decrypted/reencrypted, whether the salt is changed, etc.).

How the files gatekeeper.*.key and locksettings.db used in the process.

Whether or not the FBE key ever changes with the password.

The purpose of all of this is to determine if the problem with my lies with the encryption key being wrong or if it's a matter of cleaning up the right files, and to get past the endless Pixel is starting message to my apps and content.


问:
dropped phone in water and it had holes in it what do i do?
I dropped my lg sty lo 3 in water on accident and it had to holes in the screen  the phone turns on but it does not let me click on the screen I put it in rice but it does not work and I don"t have money to buy a new one what can I do?</p>


问:
Chrome on Android has just eaten all my data plan
I am using Chrome on Nexus 5X.
Nothing like this ever happened until the last 2 days - my data plan was depleted suddenly, the carrier's app claimed that I have no more data, and when I checked my data usage in Android Settings, I got this:

WTF?
I didn't do anything special with Chrome in the last 2 days, my occasional Facebook browsing (no videos) has no way to reach that amount.
Is there any way to check inside Chrome which website did this? Or is it a Chrome bug?


问:
How do I enable Umlauts on "Phone Keypad"-style keyboard?
First of all, I know long pressing on a char like 'a' gives me choices e.g. 'aä..' so the special char (umlaut) 'ä' can be selected. But this works only for me for the "international"-style keyboard (aka QWERTZ keypad). When switching to "Phone Keypad"-style keyboard (aka multitap/T9 keypad or 4x3 keypad), I will have no umlauts, though correct localization (set to "German"). Do you have any tips to make it work? I also observed the same behavior for the "Compact"-style keyboard.

Phone:

HTC Desire S

has Android 2.3.3 stock firmware

No additional keyboard apps, as I recently bought the phone (5 days)

Not using Swype (I know that this has pretty nice umlauts handling due to the dictionary)

ContentLicense: CC BY-SA 3.0


问:
What is the space distribution for disabled system apps?
My phone is rooted with Magisk. I have a root browser app, allowing me to "sneak peek" into the root directories.

I found, for example, that for the Google Drive app, the APK in /system/app is 23MB, but application manager shows the app size as 30MB (excluding 750KB of data). Where is the rest 7MB gone? If I debloat the Drive app, I know I will not be able to use the 23MB as that is in the system partition, but will I recover this 7MB?


问:
Permanently split screen (damaged touch screen)
Is there any way (via app, adb or anyhow) to force Android to actively use only part of the screen AND (this is crucial) to display something else (e.g. clock or some widget) on the remaining part?

The thing is I found an old Nexus 7 and a small part of its digitizer is damaged (top part, about 1/4 of the whole screen area). I wanted to somehow permanently "split" the screen and use the remaining 3/4 for regular use and have the rest display time and date, current weather or anything else.

Ideas anyone? :)


问:
Android Auto is not working with Realme1 (6 GB / 128 GB)
I have Sony XAV-AX5000 in my car, I tried to run android auto with my realme1 (6GB /128 GB) variant but it is not woring in both colorOS 5.2 and colorOS 6.

I checked with other phones (iphone as well), Android auto and Apple car play both are working fine as expected.


问:
Permit use hardware (camera,microphone,etc) to application for some time, not forever
In Android 6 and latter, when application asks for permission (for example camera access) user can

allow,

or dismiss,

or check 'do not ask any more' and dismiss.

I would like to have one more option:

allow for some time (5sec,1min,5min,3days)


问:
Play Store silently updates apps although auto-update is disabled
On my Samsung Galaxy Note 4, I have XPrivacy installed.  This tool tells me about newly installed and updated apps.

In the Google Play store settings, I've set my "App download preference" to "Ask me every time".  I've also set the "Auto-update apps" preference to "Don't auto-update apps".

Still, once every couple of days, XPrivacy informs me about random apps being updated.  Sometimes it's the Google Play store itself being updated.  Other times, it's other apps.  Usually, a bunch of apps are updated at the same time; therefore, I doubt it's some self-updating feature of those apps.

So, in sum:  I've tried to set things up so that the Google Play store doesn't update apps without asking or even informing me.

Why is Android ignoring my preference?

Security reasons?

I feel betrayed.  :(


问:
AFWall+ not blocking consistently
I'm running a rooted pixel 3 (Magisk) with the "liboemcrypt disabler" module for running Netflix, Magisk Hide and the dg.db edit to disable attestation for running Google Pay.

The firewall will work sometimes after applying the rules a bunch or after a restart, but it doesn't work about 80% of the time and works only about 20% of the time.

I have tried disabling and enabling, enabling delayed startup, disabling LAN and toggling IPV6 (found a few posts about the same issue and those were the suggested fixes).

Here is my config:

https://pastebin.com/raw/2ANFnpCS

Any ideas on how to get AFWall working?

Title: AFWall+ not blocking consistently


问:
How to clear all of this Bloatware that is insidiously being put on my phone?
As is probably a very regular question here, I have a Samsung Galaxy S5 Neo and I'm having problems with the amount of memory being clogged up by what I will assume is garbage. I have installed on my phone ES File Explorer and it helps with cleaning things up, but I'm consistently low on internal storage and as a result my phone is slowed down. I barely have any  documents or downloads on my phone. The largest set of files is pictures which take up 194.38 MB. Here is where the issue is, there is 9.72 GB being categorized as "Other". So the percentages are as follows:

Picture: 194.38 MB

Audio 103.99 KB

Video 124.23 MB

Document 8.68 MB

APPs 6.34 MB

Others 9.72 GB

It drives me up a wall because I don't save anything to my internal storage and always use my SD card. So I'm of the feeling that it is my provider and Samsung that have put a bunch of bloatware on my phone. So the question is how to find it and get rid of it all? Suggestions on a set of instructions I could follow? I feel there i no reason my phone should be this restricted for storage considering how I use it.

Thanks in advance.


问:
After the playstore update I'm no longer able to use my Play Store credit from my Google Rewards app
I have $6 in my google rewards app sitting there and there's a button on the app to take me to the app store. When I click on a premium app the option to pay for it with the rewards balance does not appear.

Has anyone else seen this issue? I am using a pixel 3. The balance also shows in my Google Pay app as well. I have been able to do this in the past no problem.


问:
Bluetooth icon in status bar on Android pie
Is it possible to display the bluetooth icon in the status (notification) bar on Android 9 pie (Bootleggers rom, to be more specific), when the device is not connected to any other devices through bluetooth?

I like to only enable different sensors/radios of the phone, when I need and use them. At other times, I like to keep them disabled. But sometimes I forget to disable bluetooth on the phone, after using it in the car.

I'm not 100% certain, but I think that the icon only appears when the phone connects to another device through bluetooth. And I'm sure that when bluetooth is enabled and the phone isn't connected to anything - there is no icon.


问:
Enable external users to un-silence my phone
I have my phone on do-not-disturb or silent virtually always. I usually see my phone, and can see I'm being called.

However, sometimes my SO needs to reach me quickly, and I just happen to not see my phone. I want her to somehow be able to force my phone to ring then.

I seem to recall someone talking about being able to do this on their phone: if their SO called them 3 times in rapid succession, the phone would enable sound. I don't remember what phone or app or such this was using.

I want something similar. It doesn't have to be the exact same thing, but I simply want my SO to have a way to quickly, without much effort, be able to reach me even when my phone is on do-not-disturb. (the advantage of the 3-call thing is that you can do it while driving using the on-board hands-free system, no additional effort needed).

Can anyone point me to how to do this?

Some additional info: My SO uses an iPhone, I have a Nokia 6.1 running android 9


问:
Connect to Android phone stuck in boot
I would like to access the data from my Android phone stuck in boot. Is it possible to connect using ADB or anything any this stage?

Details:
I have a Huawei Mate 20 Pro purchased April 2019. I believe something is wrong with the charging mechanism. There has been a charging issue for several weeks now - it charged very slowly. When the phone is unplugged, it shows the red logo indicating that the battery is empty. When the phone is plugged in, it goes to the HUAWEI boot screen and gets stuck.

I took it to the Huawei repair center. In order to conduct ANY repair, they must first delete the data to comply with German law. I have not heard of such a law... but anyway... is there any hope in recovering the data before I send it off for repair?

OwnerDisplayName: Jeff

Title: Connect to Android phone stuck in boot


问:
Password reset screens appearing while inactive; was I hacked?
I put down my Samsung Galaxy S7 phone after making a phone call, and then noticed that the settings appeared on screen, and things like "reset password" were being clicked and text was being entered into password fields for my Samsung and Gmail account.

After unsuccessfully trying for a few seconds to get this to stop, I completely switched off the phone. I have since checked my accounts from another device, and nothing (visible to me) seems to have happened there.

I had been warned about an OS update yesterday, but stupidly clicked to install it later. Now I'm wondering whether there's anything in particular I should do when (or before) I switch on my phone again. Does all this sound like the symptoms of the Android vulnerability that has been in the news this month? And if I get the update installed, will this also check whether the vulnerability has been exploited?


问:
Is there a smart way to find an app with the features I want?
Is there a smarter way to find the app I want? Basically, I'm searching the app store for a note-taking app that will suit my needs, and the number of apps is large. So, my approach is to find the note-taking apps and include "sync" and "import" in the search. My goal is to find an app that will both import my existing notes from the default Memo app, and also support syncing with my Google Drive so that I can look at notes on my PC. </p>

<p>But that results in a large list of apps to sift through, looking for the right one. Further, not all the apps fully describe everything they do, and might have the feature I want without mentioning it in the online description. Is this a problem without an automatic solution, or is there a smart alternative to my approach? </p>


问:
Is it possible to enable native video calling in stock android?
My phone's IMS status shows that video calling is unavailable that I can't do native video calling.

I'm using stock android on Asus  Zenfone Max Pro M2.

Android version 9.0.

So is it possible to activate video calling.


问:
How can I install apk that allowing only installing from google play?

I have apk that I want to edit the assets on him and upload that back to the device. The apk downloaded originally from the google play, and I used apk extractor to get the apk of the app.
 But when I'm trying to install the new one from apk, and not from the app store, I'm getting an error on start saying app not installed from google play store, reinstall from there.

I put my hand on the code by revers engineering with jadx.

So I know that they check by install package name and I even found the function to edit, but I can't edit because (because I don't know how to recreate the classes.dex file and I think because this is not like the real source code, I get a lot of run time errors).

I tried also adb shell pm install -i com.android.vending -r [package name] didn't worked...

Does anyone know what I can do?
Thanks,
Alon.


问:
Changing timer sound in Oppo devices
I have an Oppo AX5 with Android 8.1.0. The clock app timer sounds like a smoke alarm.

How can I change the timer sound?

Title: Changing timer sound in Oppo devices


问:
Use video for camera emulator in Android Studio for debugging camera / image recognition based App
I need to debug some image recognition app and therefore need a specific camera input to see if the app is working.

Is there a way to use a custom recorded video, for example using the Android Virtual Device manager and it's emulated camera?


问:
How to remotely control an android phone without using the screen?
Ok Today I got a problem where something looking like a blue ink stain progressively leaked inside the screen in 6 hours until things turned from blue to completely black until nothing can be displayed anymore.

The touch screen still works so I can still do things like doing a phone call, but I don't remember anything else for accessing apps or other menus.

I have usb debgging on and all Samsung/google remote control operations enabled (but as far I'm aware they don't allow full control). I also have teamviewer installed but it's not configured.

Because the point is the phone is connected to Internet. I need to go back home today and I need the gps for it. Local sellers don't have the screen before 3 weeks.

However, I have a second tablet but it's WiFi only. If I could find a way to remotely enable WiFi tethering (or with spoken commands) things could a lot of easier.

Update :

Now it’s not only the phone which has a problem, but the car does no longer run (as the engine is burning it’s own oil).

And has young driver still on bail, I can’t rent anything.

Though I’m still interested on how to solve such kind of problems in the future.


问:
HTC One X Video Sync problem
Here is a video of the problem I am having.

Basically, when I am recording a video and the phone receives a notification (even if the phone is on silent) the video and audio step out of sync massively!!

See the link below, I made a video to show what I mean.

http://www.youtube.com/watch?v=d9CYqAqPLS4

Title: HTC One X Video Sync problem


问:
How to report an issue with the entrance when Maps never thinks I have arrived
Google Maps / Directions has this neat feature where after you reach your destination it asks you if it routed you to a convenient or proper entrance.  This is very nice because sometimes when there is a cluster of businesses it doesn't know the proper way to route you to the building you are going to and you can help out by telling Google where it should have had you enter.

However, there is one office building I frequent that it keeps wanting me to head about 500 feet further down the road.  The would put me right in front of the building on a busy street, whereas the correct entrance is to turn right and go into a parking lot behind the building.  Unfortunately I have not figured out how to report this to the mapping program, because even once I go into the entrance it still is telling me to keep going.  If I exit navigation it never asks how it did!  I used to remember an option to tell it you want to walk the rest of the way but I don't see that any more and don't know if it would help.

Short of going for a long walking detour (which I never have time for), how can I tell Google that I have reached my destination so it can get my feedback on how to make directions better?

Update: I tried walking in the building itself to try to get closer to where it wants me to go while I was waiting for an appointment, but I am not actually getting a signal.  I'm not really sure if it's even possible to get to where Maps wants me to go without walking outside around the whole building, which is probably around 1000 feet.

OwnerDisplayName: Michael


问:
Data connection is disconnected while talking with phone
I see that my Samsung A5 running Android 8 drops data connection when I am talking with the phone app.

I mean, while data connection is ON and I see 4G icon, by placing a call or answering a phone call, the data connection is lost. After the call ends, I see that it goes back to normal state.

Is that normal?


问:
Contacts displayed multiples times with different color codings
Today, I migrated to a new cell phone running Android Pie. The model of the phone is Xiaomi Mi A3. I use to back up all my contacts on Google Contacts and sync it whenever I change my phone. This time, I ran into an issue. Though each contact is saved exactly once in Google Contacts/Contacts App, I find multiple copies of each contact displayed in my Phone App with different "color codings". I assume the colors represent something which I have no idea about.

Kindly suggest a way to get this resolved. Thanks!


问:
Charging problem. Please help
My phone (Note3, CustomOS: Phronesis) got a charging problem last night. It does not charge properly when running or if the screen is off now. Usually the LED went on while charging but it stays off now. Tasker is able to detect a power source (i had my Tasker icon change to a battery when connected) but the phone seems to cut off the charging current - like i assume it does it when it hits 100%, If connected now and i use it then the discharge is exactly comepensated, i. e. if i use it for 30 minutes, it stays at 78% the whole time....in fact my power bank led is flashing parallel to power consumption actions... Hardware problems can be 99,99% ruled out, since it charges normally if i shut it down completely.

Last night i had a SuperSU update (automatically) which was asking for the permission for SuperSU itself (i think, also confusing) and for the zygote process... (Expert info: shell, ps ...grep: just 1 process), which surprised me... i think i didn't grant them... (it's not in the app list- didn't ask again)

I also tested the QI - same thing: the phone detects it (effect:visual "smoke rings" on the screen) and immediately it says "wireless charging stopped" (in german)

Did i accidently lowered the cut-off charging from 100% to a much lower number ? If so , how to revert ?

Beside USB-Mode (MTP/PTP,Charging/etc.) and USB Fast Charging....anything else affecting USB handling ?

Hints (even for for Kernel Auditor Mod settings) are welcome.

I found something similar How do I override charging current on Huawei Honor 6?  and i need the files for my Note3...

EDIT: a faulty version of the app 3c was the culprit...

Title: Charging problem. Please help


问:
Disable Client Isolation when using hotspot
I just moved to a new place and internet is not setup yet so I'm using my phone's hotspot to get online. While developing a Python client-server program I found out that devices connected to Android hotspot cannot communicate with each other. When I ping one computer from another I get a "Destination host unreachable" message. This must be some sort of client isolation. Does anybody know how to turn it off? Using latest crDroid on Android 9.

[UPDATE]
I run a few more ping tests and they seem pretty inconclusive. I got some hits but the results vary between 'Host unreachable', 'Request timed out' and various TTL times (6ms to 4000ms).


问:
What is taking the storage of my Huawei phone?
Update: The suggested duplicate  question does not indicate how to solve it, nor do I think it explains the situation unless there is a unusual amount in the hidden folders

I recently did a factory reset reset on my Huawei P8 lite 2017, and as soon as I installed a few apps if started to complain about memory.

I looked at it from every angle I could think of and it just doesn't seem to make sense. Here is a screenshot of the memory usage:

My question:

Where did the remaining memory go, can I free it up?

Note that I am not allowed to root the phone


问:
Unpacking and repacking boot.img changes it's file size
So I unpacked boot.img file using unpackbootimg in ubuntu. Then without changing the file I repacked it. But the filesize became smaller. From 36.7 MB to 17 MB. I tried to flash that image to my phone. But it failed. Also ramdisk file was empty after unpacking the boot.img.

Note: This specific rom is a rom from Symphony i97. It has Spreadtrum UNISOC SC9863 chipset. And I unpacked this rom using spd research tool. Also this phone's fastboot and adb commands are tempered so most of the commands don't work. Most of the time it says unknown command or not implemented.


问:
How to check installed TWRP version?
I’d like to know if there is a way to check what version of TWRP is installed using bash (using a file or command in Android).

I could find /persist/.twrps only, which is data file. No command I have found.

Title: How to check installed TWRP version?


问:
rooted device: how to run SSH server persistent even on reboot
I (linux user but not an expert) just moved from iOS to android, my device is rooted (Samsung s9) and I want a ssh server running all the time on my android device (I prefer openssh over dropbear) since I have to rsync files. I also prefer linux style commands e.g., systemctl restart service or similar.

I noticed that one can use Termux but it is an emulator, it won't work upon reboot.
MagiskSSH seems to be interesting. Also noticed this thread where pre-built Native OpenSSH and BASH are shared. Also, I am not sure if they run upon reboot). Buildroot has also been suggested to compile the package on my own (but my knowledge is limited on this topic).

On the top of this, I have to install rsync and bash.

So, how do I run ssh server persistent (works on reboot)


问:
Can't boot to system after installing TWRP with Odin
After I installed twrp on a S7 Edge, when I reboot to system I get stuck on a loop that only shows the "Samsung Galaxy S7 Edge" black startup screen for about 8 seconds  and then reboots automatically.

I can get to twrp recovery mode if I press the key combo.

I can even flash the original stock ROM with Odin and start the install process all over again. But still getting the same results...

What am I doing wrong?


问:
Encryption failed after turning my android phone on
when i turn on my phone it shows "Encryption failed" and "Unable to start up your device. the encryption process was interrupted. you need to reset your device to factory default setting. this will erase all your data " and it has a reset button. this reset button and flashing my phone with Odin does not help. how can i make it work again?</p>

OwnerDisplayName: Farzam Abrishamkar


问:
Does lockscreen widget still supports in compatibility mode on Android 5 and above?
As per the documentation here:

https://developer.android.com/guide/topics/appwidgets

https://developer.android.com/about/versions/android-5.0-changes.html#lockscreen-widget-support-removed

Google has removed support of lock screen widget from Android 5.0 and above then how this app is still showing widget on lockscreen?

Phone is running on Android 8.


问:
Does Termux call fork/exec system calls in Android?
There are tutorials (e.g., this and this) that use Termux to compile and run cpp codes in Android. Does Termux run fork/exec system calls and start running the program's main function? More generally, do terminal emulators in android really create Linux processes running directly on the hardware or do they act as a virtual machine and introduce a performance loss?</p>


问:
Using a phone to give internet access to an already established network
I am currently planning a project I wish to undertake in the next few months, a power bank / portable file server / wifi router. I want to be able to give internet access to devices connected to the wifi network using my phone (rooted).

Client -> wifi router project -> my phone -> Internet via mobile data

My phone would also be a client on the network. I would be using a raspberry pi zerow inside the project.

Wondering if this is at all possible, and if it is, how would I go about doing it?


问:
One Plus One broken screen recover data (google auth codes)
I unfortunately broke my screen for the second time on my One Plus One. And it seems that my first repair somehow was not totally good, since when I booted it up with the replacement screen, the bottom of the screen was not working.
That makes me unable to unlock my pattern and access my precious data on my phone (the most important being a Google Auth code, and I can't find the recovery codes for that one).

The phone is running Cyanogen, so I tried to access it with adb :
 - I booted the One Plus One in recovery mode by holding the Volume - and Power buttons.
 - then I selected Reboot to bootloader
 - Finally i connected it to my laptop (running Archlinux) and typed fastboot boot twrp.img and got the result Device not unlocked cannot boot

I was mostly following this answer.

So, my question is, am I really out of luck and my data irremediably lost since the phone is locked ? Or is there workarounds with adb ? I only need to recover the data, not really to restore the phone.

For clarity, the phone still works, except for that lower part of the screen.

It seems there is some things I could do but I'm not really sure how :
 - Simulating a mouse with my computer to unlock the pattern grid
 - Extract the disk (but I'm not really sure what the connector type is...)

Thanks in advance if you have any leads.


问:
How can I disable the screen timeout on Samsung One UI (Android 9)?
How can I disable the screen timeout on Samsung One UI (Android 9)?

I've only found:

which only allows to increase the screen timeout, with a maximum of 10 minutes.


问:
How to enable edge-to-edge display for any app in Android Pie?
I recently upgraded my OnePlus 6 from Android Oreo to Pie (OxygenOS 9.0.8; rooted).  This release came up with a restriction that only the apps listed under Settings → Display → Apps to display in fullscreen can use edge-to-edge display (full immersive mode including notch area). As of now, YouTube app (using YouTube Vanced v14.21.54) is not shown in that list, and when I enable immersive mode that app doesn't make use of the notch area at all.

Here's how immersive mode looks like with and without notch area:

(Images edited. Courtesy of OnePlus)

One thing I noticed is that, for the apps in the list if they are set to be launched in fullscreen (including notch area) the appops operation APP_SCREEN_COMPAT is set to deny, while in default state, it is set to ignore. Manually changing it via adb to allow further reduces the immersive mode screen estate.

I tried adding that operation (op) manually for YouTube app but it didn't make any change, including when I force-stopped the app and even restarted the device. The op is reflected in appops query though.

I used this command:

```<code>adb shell appops set com.google.android.youtube APP_SCREEN_COMPAT deny
</code>```

I also tried changing policy_control global settings property to immersive.full=com.google.android.youtube but it didn't make any difference either.

I came across some forums where users shared similar problem with their choice of apps with no solution in sight. I also looked for some related Magisk and EdXposed solution but found none. GravityBox [P] doesn't have any feature either.

So, how do I make sure any of my app can use edge-to-edge display in immersive mode?


问:
Nexus S Update 4.0.4 screen sensitivity issue?
I updated my Nexus S to Android 4.0.4, which is amazing for battery charge time, but I have a problem with touch sensitivity.  It's lagging and registering touches in place that I did not touch.

Anyone face this problem?

Any advice to avoid this problem?


问:
hospot problem on andriod 6 on sony experia z3
I am using android 6 when I open the hotspot setting they give the error " Tattering Hotspot Creating failed". When I use pda net for creating hotspot it will easily created. What the problem behind them?</p>


问:
Sony Experia won't let me enter my voicemail PIN
I call my voice mail and it asks me for my PIN. After entering 3 out of the 4 digits, the screen starts blinking not allowing me to enter the fourth, then telling me I entered an incorrect PIN. </p>

<p>So the phone makes it impossible for me to retrieve my voicemail. </p>


问:
For incoming call, the Phone app does not launch to cover entire screen
In case of an incoming call, the Phone app does not launch to cover the entire screen.  Instead, two buttons are displayed at the top portion of the screen, Reject (red) and Answer (green), as shown below:

How can I get back the usual behavior for the Phone app where it covers the entire screen on an incoming call, such that a single button is displayed which can be swiped to answer or reject the call?

I am running Android 9.0 on a General Mobile GM 8 device.


问:
How to get application id of an installed application?
How to get application id of an installed application? I want to find app id of Notes 2.0, so maybe later I will have a change to find extensions to that product.</p>


问:
learning then mastering and using Android for a Linux "guru" using the command line?
I am a 60-year old Linux guru: coding Bismon (documented here) and using and coding on Unix since 1987 (SunOS3.2) and Linux since 1993 (but I never used Windows, and very probably never will). Of course, I do like command line interfaces. My sight is not very good but did improve (I got cataract surgery a few months ago). BTW, I did contribute to GCC plugin system thru  GCC MELT (an obsolete Lisp-like DSL -that I designed and implemented- to extend GCC)

For my 60 years birthday, my grown-up kids gave me a tablet: Huawei MediaPad M5 (Android 8) which I completed with a Logitech bluetooth physical keyboard.

I want to understand much more how Android works. Of course it runs a Linux kernel (so same syscalls(2)), with a strange bionic libc. I knew (and wrote a technical report - some internal survey document) the internals of JVM and JNI in 2001. I do know a bit of Java.

I don't have the time to study all the source code of the open source parts of Android. I probably would have the skills to do that, but not the motivation and time.

It seems that Android is using setuid & chroot techniques quite differently than usual Linux distributions do. Where is that documented? Apparently, each JVM (for every Android app) is running under its own uid.

I would like to be able to code small GPLv3+ applications for Android. What do I need to learn. I just did download the SDK tools for my Linux AMD2970 desktop.

What are the next steps? I know that Qt has been ported to Android and wish to code for it.

What would be the Android equivalent of the ALP book to code Android applications with both Java and C++ (Android NDK). Or where is the equivalent of section 3 of man pages for Android? I am considering cross-compiling musl-libc for my tablet.

I am afraid of rooting my brand new tablet (that could lost the warranty). I might be tempted to install some Debian-like thing on it within a year. Is that reasonable?

I might port SBCL to my tablet (if that is easy, which I don't know).

PS. I am a free software enthusiast.


问:
How to unlock teclast p80x bootloader?
In the Developer menu, I have enabled "Unlock OEM".

I run the following commands in adb, and get the following errors:

```<code>fastboot flashing unlock =

FAILED (remote: 'Not implemet.')

fastboot: error: Command failed

fastboot oem unlook =

FAILED (remote: 'unknown cmd.')

fastboot: error: Command failed

fastboot flash recovery recovery.img =
Sending 'recovery' (14100 KB) OKAY [ 0.599s]
Writing 'recovery' F**AILED (remote: 'Flashing Lock Flag is locked. Please unlock it first!')**
fastboot: error: Command failed
</code>```

Please help.

Thanks,

Title: How to unlock teclast p80x bootloader?


问:
Disable external GPS
I use Android Auto a lot.
My car's entertainment unit, which I connect my phone to via USB in order to use Android Auto, has it's own GPS antenna.

But it's slow to obtain my location, and often downright wrong, like several kilometers/miles off.
My phone's GPS is a lot faster and gets much better results.

But it seems the external GPS in my car always takes over when I connect to it.

Is there a way to disable it completely, and only rely on the phone's own GPS?

```<code>Hardware information:
Phone: OnePlus 7 Pro, Android 9, Oxygen OS 9.5.11.GM2BA
Car entertainment unit: Alpine iLX-702D
</code>```

Title: Disable external GPS


问:
How do I cast screen from Pixel 3 to something that is not Chromecast?
Booting Chromecast requires working Internet with unhindered connection to a Google server with a non-fake TLS certificate. So using Chromecast seems to be not an option in my use case.

What else can be used to cast screen / audio from Pixel 3 to some HDMI-outputting device? Are there alternative hardware devices that are compatible with Pixel 3? Can [rooted] Pixel 3 running Android 9 use Miracast instead with some third-party software?

Or maybe there are some other methods to make a "virtual Google" to allow Chromecast 3 to activate?


问:
Samsung Galaxy S10 automatically deleting emails using email app
I'm using Samsung Galaxy S10, and it is automatically deleting emails using the email app.

What do I have to do to keep emails from being deleted?


问:
How to enter recovery mode with an OTG keyboard?
I would like to know how to boot my Mediatek tablet into recovery mode by using a physical keyboard (OTG) because my volume key doesn't work.
And I can't boot to the OS to enable the USB debugging.</p>


问:
How to wipe and reinstall an encrypted device with 7.1.2 if TWRP won't boot anymore?
I installed an unofficial build of Resurrection Remix 7.1.2 on Meizu Pro 5 (M86) with TWRP 3.0.2. Out of curiosity I then enabled encryption with the thought that even if I don't like it and cannot reverse, I should be able to rollback the previous system backup via TWRP. There is no data to care about, but still I want to be able to install on the phone whatever I want.

I was wrong. TWRP won't boot anymore. Its boot screen appears but just flashes every 5 seconds or so.

I then tried a few things:

Factory reset from the Settings. I can reach the "Erase Everything" button but it does nothing;

Factory reset from ADB:

recovery --wipe_data says /system/bin/sh: recovery: not found

wipe data says /system/bin/sh: wipe: not found

After adb reboot bootloader I have no luck running fastboot devices: it outputs nothing

Attempting to flash a newer version of TWRP from TWRP App (image for Meizu Note 6; there is none for my device) but it complains that the device is not rooted (the developer settings only allow root via ADB).

So is there a way to just wipe the device and re-install something on it?


问:
Mobile data offline or timeout whereas hotspot just works
How can I troubleshoot the following situation:

during mobile data my phone often is experiencing 100% time outs (ERR_TIMED_OUT) or Chrome states it is offline

whereas my connected laptop through hotspot is not experiencing any issues

My phone states full connectivity and 4g being present.

This leads to my hypothesis that some configuration or malicious app is flooding the local network stack on my phone.

Is there a way to diagnose this further? I really want to get my mobile data connectivity back!

Phone: Lenovo P2.
OS: Android 7.

Edit 15-09-2019
I have reset my phone to factory settings but to no avail. The issue still remains. I also swapped SIM cards with another phone. No effect. The second SIM in my phone does not solve the issue. And my SIM in another phone just works correctly over there.

Edit 16-09-2019
Interestingly, apps that have lots of patience (long time-out policy), such as my mobile park app, and apparently WhatsApp as well, are still able to send and receive data.


问:
Connecting an account fails because of alleged Family Link and Google Play Services version mismatch
I'm migrating from a Samsung Galaxy S4 Mini to a Redmi Note 3 whos bootloader I unlocked and then updated to Android Pie.
Whenever I try to use the account that is already used by the Samsung device I get an error because (allegedly) the installed Google Play Services or the Android version are less than the supported ones (please see screenshot below). The error displayed is "update required ... This device needs newer software". Before this screen is shown I shortly see a screen with "Parental permission" on it, which is the screen that I would expect in order to connect this (second) device with the Family Link app for parents.

This error should not be shown because Android Pie (=9.0) is way more current than the demanded Android 5 and my play services are version 19.x

These are my attempts so far:

tried different custom Android Pie ROMs (Pixel Experience, liquid, aex, ...). All of them show the same effect.

flashed pico, micro and stock opengapps, makes no different

checked date and time to make sure they are current (they are)

went to Settings / Apps and deleted cache and more (didn't help)

checked for working Google Play Servics with a diagnostic program (they are recognized and have a real up to date version)

updated Play Services with an APK from apkmirror (same effect)

instead of linking the account in the setup agent I skipped this part and linked the account (or tried to) via Settings/Accounts

None of them helped. Others have the same problem but no solution either: https://forum.xda-developers.com/redmi-note-3/help/google-family-link-kenzo-t3850734


问:
Trackpad in landscape
Did anyone by any chance figure out how to make a hardware bluetooth trackpad work properly in landscape mode?

It seems that the system does not change the axis logic for trackpad coordinates when the android device is put in landscape. As a result, the trackpad cannot reach the far right side of the screen.

We have been struggling with this for a while, now, so any feedback would be greatly appreciated.

Thx,

Jan

Title: Trackpad in landscape


问:
OnePlus 6t bootloop
My OnePlus starts with its normal android animation of the two dots revolving around the red dot but however the two dots freeze and after some time restarts again.

I downloaded the stock rom version 9.0.16 and tried to flash it using fastboot update /path/to/mystockfile.zip but it says

```<code>--------------------------------------------
Bootloader Version...:
Baseband Version.....:
Serial Number........: 1f1887f2
--------------------------------------------
archive does not contain 'android-info.txt'
fastboot: error: could not read android-info.txt
</code>```

Title: OnePlus 6t bootloop


问:
How can I restart my Samsung S9 phone without the power button or any other physical button?
How can I restart my Samsung S9 phone without the power button or any other physical button, and without rooting my phone? I only want to use the tactile screen.</p>


问:
How to set individual sensitive content hide in android 9
Before using Android 9 I was able to set individual sensitive hide content on lock screen rule app by app. Something like, globally I selected Show All notification on the lock screen and then go to the specific app and set hide sensitive content on the lock screen.
In android 9 stock android, I can do this, but the individual settings do not work, it still keeps showing sensitive contents on the lock screen. More specifically, when I am using WhatsApp or Messenger, It displays the message content on the lock screen even though I have set hide sensitive content on the lock screen. Is that a bug?</p>


问:
duplicate files in categories>documents
I have a Huawei GR5 2017 BLL-L22 cell phone running Android 7. There are duplicate files under Categories>Documents. For example, There are two "birthday 9-10.txt", both having the exact same date, time and file size. Another example: "18614_20190915 financial.xlsx". Again, same date, time, and file size. There are more.

The strange thing is if I delete the duplicate, leaving only one copy of them. Not before long, the duplicate comes back. I'm not using Cloud. I don't synchronize anything. Who or what is making the duplicate and how do I stop it?

Title: duplicate files in categories>documents


问:
Philips Android TV 43PUT7791/v1 boot loop issue
I have Philips Android TV 43PUT7791/V7 which stuck at logo and rebooting continuously. I want to enter into recovery mode . I have tried with pressing and hold  down key and plugged the power and waited for 1 minute and also tried combination present in joystick keys.
Kindly, someone help me to enter into recovery mode.</p>


问:
Red-and-White Megaphone App coming up unsolicited
For about a month, an unknown app has been occasionally coming up on my cell phone's screen, interrupting whatever I'm doing, displaying a black screen and that rolling circle in the middle that means I should wait.

It lasts a couple seconds or more, then leaves without a trace, returning focus to whatever I was doing before.

When it lasts a little longer, I'm able to press that lower-left button that "zooms out" to all open apps, each with its logo on the top. I'm then able to close it, or take a screenshot.

The logo of our mystery app is a red-and-white megaphone, which I do not recognize. See attached screenshot.

That logo does not appear in the list of all installed apps.

The timing seems to be random.

What is this app, what is it doing, and how do I get rid of it?

The phone is a Samsung Galaxy S9+

I'm running Android version 9

The phone has served me flawlessly for over a year before getting this issue.

I do have many apps installed, some of which are ad-supported games. They all either came preinstalled, or came from the Google App Store.


问:
Android 9 app pinning not working
My LG V35 was recently upgraded to Android 9 and after the upgrade app pinning stopped working. I can pin an app but it gets unpinned by the OS and removed from the list of my recent apps. This was never a problem with Android 8 before the update. Any app I pinned before the upgrade stayed permanently pinned even after restarting.

I tried adding apps I want to stay pinned to the list of power saving exclusions but that did not help.

Any ideas how to fix this or is this "normal" OS behavior with Pie?

Edit: This question is not about screen pinning, it is about app pinning (the little pin shown on the app title bar when app list is open).

OwnerDisplayName: Dean Kuga

Title: Android 9 app pinning not working


问:
How to downgrade from Android 10?
Android 10 is extremely unstable on my Pixel XL. Most apps crashed within a few seconds after open, even including Google Play Store. That means, I could not do any new app install, because Google Play Store crashes within 3 seconds; I could not do any app update, because it crashes within 3 seconds.

And the chat/phone call of Support function in Settings disappear. That means I have no more support.

I could not take screenshot, because it crashes.

Any idea how to downgrade from Android 10 without any data loss without any app reinstallation, just like the way we do the upgrade install (we do not need to do any backup)?

Title: How to downgrade from Android 10?


问:
My wife can cast videos from her phone to our Chromecast, but I can't. What gives?
She has a Samsung Galaxy Note 8, while I have a Google Pixel 3. I can cast if the app in question (e.g. YouTube or Hulu) supports casting with a built-in cast button, but if I used the system screen mirroring cast feature from the pull-down menu (say, for an app that doesn't support casting internally, such as Spectrum), I can't cast videos - the part of the screen where the video is appears black on the TV. This sounds like some sort of DRM issue, but why would it only affect my phone and not hers? Is there any way to cast videos from my phone?</p>


问:
Samsung Pay not working with an Indian Card on a Galaxy Note 8 purchased in Hong Kong
Don't know where to ask so asking it here.
I have an Galaxy Note 8 which was purchased from Hong Kong long back.
I want to use Samsung Pay on it but no Indian Cards are working.
I am pretty sure this is because of purchase location, because my dad has S10+ bought in India and S Pay works flawlessly with Indian Cards.
So is there any by which i can use S Pay</p>


问:
Wi Fi Sleep policy doesn't work on Galaxy Mini
Set the WiFi Sleep policy as 'never' but when my new Galaxy Mini is in sleep mode wi-fi is turned off. I tried with a few apps like 'Keep WiFi' without success. Is anybody out there who actually got the same problem and solved it? </p>


问:
No images from SD card are shown in PTP mode
I have ASUS ZenFone Max Pro M2 with latest updates installed (Android 9, 070 firmware version)
I try to connect my phone to PC (Arch Linux 64 bit, Cinnamon DE, Nemo file manager, latest updates installed, gvfs-gphoto2 and gvfs-mtp packages are installed too).

When I connect my phone via USB it suggests different modes for connection: charging, MIDI, modem, file transfer and PTP (strange thing: where is MTP?). When I choose file transfer I can see the whole directory structure for SD card and for internal storage, that just works fine.

However, when I select PTP mode I can see only directtories from internal storage (e. g. DCIM, Instagram etc) and no dirs from SD card. I already have DCIM/Camera directory tree on SD card and camera app saves photos and videos to it properly.

I tried to clear cache & data for External storage and Media storage apps and reboot but nothing changed - still no directories from SD card are shown when I select my device in Nemo file manager.

How can I enable access to SD card in PTP mode? Additionally, where is MTP mode and how I can enable it?

EDIT 1: seems like "File Transfer" is synonym for MTP


问:
Activity Camera (in application Camera) is not responding
I am having a strange issue with my Camera app.  When I open the application, I received the following message:

```<code>Activity Camera (in application Camera) is not responding
</code>```

after about 5 seconds.  However, I am able to capture photos from Facebook using the Camera activity, and other photo apps like Camera 360 works properly as well.

I have Samsung Galaxy S2 (GT-I1900) from AT&T.

Edit

Thing I have tried:

Clear cache/data from Settings/Application/Manage Application/Camera

Remove SD card, which results in the error "Please insert an SD card
before using the camera."

Restoring the Camera Apps from Titaniumn Backup from 2 weeks ago, when the Camera app was working.


问:
Chrome Uses Background Data Despite Its Background Data Has Been DISALLOWED in Android Setups
Android Chrome eats LOTS of background mobile data on my phone. This is despite the fact that in Android setups I DISALLOWED Chrome to use background data (i.e., Settings -> Connections -> Data usage -> Mobile data usage -> Chrome -> the toggle "Allow background data usage" is "off").

UPDATE: My mobile data usage comes from a single web site where I listen to audio books.  I keep only that single tab open in Chrome.  Normal data usage from that site is around 0.5 ... 1 MB foreground data per minute and zero background data.  However, on some random days (every 2-5 days) I find that Chrome used up LOTS of background data, at a rate around 10 ... 30 MB background data per minute.

Just happened another time today Sept 25, 2019, see the following two screenshots.  The time difference between them is 8 minutes.  In those 8 minutes, Chrome (with a single tab open), used 10 MB foreground data and 130 MB (!) of background data.  This, despite the fact that "Allow background data usage" toggle was "off".

See the attached image: a Sept. 18 2019 screenshot of data usage by Chrome. Note that between September 8th and 18th, Chrome used 1.8 GB background mobile data in addition to using 0.2 GB foreground mobile data. The toggle "Allow background data usage" has been "off" since before Sept. 8th.

My phone: Samsung S7 SM-G930T T-Mobile with latest T-Mobile stock Android 8.0 load.

Any help would be appreciated!


问:
Auto upload photos directly from SD card to the cloud
I've an SD card reader attached to my android tablet. During traveling I want to backup my camera photos from the camera's SD card directly into the cloud (e.g. OneDrive) without storing them on the tablet (since there is not enough memory on it). Is this possible?</p>


问:
Malware that destroys the color yellow?
I have no idea where to turn with this, but I am worried that malware or other misbehaving software is causing a color distortion.  The story is:

my phone, a Moto G5 Plus, at some point lost the ability to show the color yellow, rendering it instead as a sickly green. The screen overall lost a bit of "spark", becoming washed out and dull.  It was an old phone, and I decided to live with something I was pretty sure was a (rare, since I found no similar stories on the net) hardware issue.

I then upgraded to a Mate 20 Pro, which surprisingly showed the same thing.  Since it was new, I returned it to the shop for repairs, and brought my old phone back to life.  The repairs took long enough that I managed to break my old phone's screen, order a new one, and replace it.  To my surprise, yellow was still missing after I changed the display.

I finally got my new phone back, after a display change and factory reset, and now it's all good.

Thoughts:

it seems very unlikely to me that the same obscure hardware error would occur to me twice.

especially since the display technologies are very different, LCD vs AMOLED.

the Mate was updated with all the magic of Android, so a number of apps and potentially data were automatically installed/transferred.

after I got the Mate the second time, I accidentally logged in with the wrong account, so no automatic installation/recovery was performed.

It sounds unlikely, but is there malware or flawed software that could cause this?  Something that were transferred with in the recovery process the first time?  And if so, where can I report it?  Can anybody find accounts of similar experiences?  If it is a hardware fault, does it have a plausible explanation (it seems all of R,G, and B, are mostly intact, it's only yellow that turns green).

Title: Malware that destroys the color yellow?


问:
What to do if I suspect my device is compromised?
I recently bought a Pixel 2 XL "open box" off eBay. The device appears slightly used, and a couple of days after registering with my Google account, I received security notifications of attempted logins in a far-away country. For this reason I suspect that the phone may have some kind of spyware or other unwanted software in it, that I want to promptly get rid of.

My options as far as a I can tell are:

Hard factory reset: my understanding is that this just deletes user data, apps and configuration, so if the malware is deeply embedded in the system files, this method may not solve the issue.

Custom image flash: this would be the most reliable method but is a little cumbersome and may brick the phone if done improperly. I've never attempted it myself and I'm a little nervous about it.

Over-the-air (OTA) image flash: which is a relatively new method, is supposed to be more reliable that the previous method with the same result. My fear is that  since this is a more high level procedure, the process could be hijacked by whatever malware I have and corrupt the new image.

Is my previous assessment correct? Am I missing something? what is the most reliable way to reset the software in my Pixel device in order to remove malware?


问:
Monitor Network Availability (for phone calls)
Obviously my network carrier has some problems. Though my mobile phone shows two or three bars out of four for my mobile connection, I don't receive any phone calls (not available).

Is there some kind of app or service that notifies me, if I cannot be reached by phone?

WiFi is available, so it wouldn't be sufficient to just ping an internet server. Any other ideas?

I am using a Samsung Galaxy S5 mini (SM-G800F), Android 6.0.1, Voice over LTE is not supported on that device.


问:
Multiple calls to bypass vibrate
In iOS there's an option to make the phone ring even if it is set to silent mode when the same number calls consecutively.  Is there an equivalent option in Android? </p>

Title: Multiple calls to bypass vibrate


问:
Dropped cell phone in water.display is working but touch is not responsive
I accidentally dropped my Sony Xperia XA2 in water. I quickly picked the phone switched it off and tried to dry by using hair dryer for few seconds. Then wiped it with a cloth.
After which I accidentally switched on the phone and went to sleep.
When I woke up after 5 hours.only to check that my phone display is Working fine however the touch is not responsive.
Now I kept it in rice.Will my phone work fine or should I have to take it to expertise. As I am from India and this is imported phone.I am not sure if authorised service center will help me.
Thanks in advance,
Zack.</p>


问:
Netflix over mhl (usbC to hdmi aadapter) what could cause fail?
I am wondering why when I start Netflix's app it fails to playback any video (even downloaded ones).
Youtube works just fine, it's only an app running on Desktop looking environment.

So is it the DRM that could forbid that without an app knowing, I am not trying to ask an app specific thing, but globally for any app if DRM framework is the cause. Like for instance when a banking app blurs out, it's not the app causing it, but the category of the app.

The full setup looks like this:

1 Samsung S10

A smart tv (MHL compatible)

1 cheap usb-C to HDMI adapter

A long HDMI cable
(which doesn't matter at this point, since we have a connection to the tv)

A Samsung Dex running

Target app is in maximized window

(Please don't flag the question if it's poorly written, I really think this is a problem that some people will find it useful if solved, especially if they want to watch videos using some evil DRM based apps)


问:
Connect multiple Phone's hotspot to one PC
I am trying to connect 2 phones to a PC wireless.

The issue is that when I use a router connected to a PC and to the phones using wifi, it will prevent the phones from going to internet with mobile data, and I need 4G connection to internet.

Using only one phone is working properly, since I can do wifi hotspot from the phone, the phone will than go with the 4G and will also be connected with the PC with wifi dongle.

The issue is that any hotspot will have the same ip address - 192.168.43.1, as it is hard coded in code. So connecting 2 phones to same pc will have 2 gateways with same IP.

What is the proper solution ?


问:
Android 10 and no internet wifi
I've been working on developing an android app for some time now that is meant to communicate with an embedded device.

The embedded device acts as its own Wireless Access point, and has no internet connection. Since having updated a couple of android devices (A pixel 2 and a pixel 3a) that we were using for testing to Android 10, we've noticed that the device will switch off of the WIFI without internet to a different profile that has internet. This happens somewhere between 30 seconds and 5 minutes after having connected to the embedded device. (I also tested this on a generic router, with the same outcome.)

Is there anyway to prevent this behavior?

Title: Android 10 and no internet wifi


问:
How to use SD card formatted as internal storage for arbitrary data?
On an LG V30 with 64GB internal memory I wanted to be able to use a 200GB SD card (which strangely gets reported as 256GB) to store larger amount of data like pictures, music and movies.

I learned that with Lineage OS 16 (Android 9 Pie) you cannot use your SD card as before since apps are no more allowed to write data to SD cards (is there an Apple manage working at Google now?!)

I then formatted my SD card as "internal storage" (believing that it now extends my 64GB to 200GB) but there doesn't seem to be a way to move arbitrary date to this new "internal storage".

So my (still very fuzzy) question is: is there a way to use an SD card to store arbitrary (i.e. not owned by one app) data like a Movies, Pictures etc. folder (which might be synced automatically by Syncthing or similar apps)?

(extra question: can formatting an SD card as internal storage be undone?)


问:
Camera on Lockscreen
I have a Poco F1 running Miui. The Gcam is a much better camera than the stock one. Is there a way for me to change the camera that is opened on the lockscreen?</p>

Title: Camera on Lockscreen


问:
How to install global MIUI/google services on a Redmi Note 8 Pro?
I have recently bought a Redmi 8 Pro in China with the Chinese MIUI 10. Because I live in the UK, I would like to use google services and apps such as Whatsapp and Facebook that are not available on the official Xiaomi app store.

So far there is no global MIUI available on the official website and Redmi 8 Pro is only expected to be released in India in Oct. Does it mean that there will be no global MIUI available until then? Since Redmi 8 Pro uses MTK chips, there is rumour (in Chinese) that no global MIUI is ever going to be available for this phone.

Can I ask if there is any way for me to use this phone conveniently in the UK, please? Thanks in advance!


问:
Outlook app constantly requiring two-factor authentication (TFA)
I have my Outlook app synced to a number of different accounts, including Gmail, Blacknight, and 3 different Outlook 365 email accounts.

For the last 36 - 48 hours, 2 of the Outlook email accounts have been constantly requesting me to sign back into the account, using TFA. This seems to happen every 2 hours or so.

I've tried going into the settings, and resetting the accounts, but this does not seem to work.

From memory, the settings on the email accounts are set to require TFA every 14 days.

This issue does not happen for the other accounts linked to the Outlook app.

Outlook version is 4.0.16, last updated on the 19th Sept 2019.

Android version is 9, with patch security from 1st August, 2019.

Phone is a Samsung Note 8.

Any suggestions on how to resolve, as it is very annoying?


问:
How to force shutdown a android phone? (ZS570KL specifically)
My phone fell several days ago, and the screen didn't display anything now.

The model is ASUS Zenfone 3 Deluxe (ZS570KL), and I didn't root, flash recovery, or turn on debugging mode on it. The Android version is 8.0.

I've talked to customer service of phone manufacturer and was told that there's no more spare screen.

I tried to shut it down, but long pressing power button can only make it reboot. Is there any way that can force shutdown the phone?

OwnerDisplayName: Vinix


问:
How do I get the contents of an HTC .hbk file... without buying an HTC phone?
I broke the USB port of my HTC One phone, so I am unable to charge it any longer.

Before the battery was dead, I made all the needed backups, including SMS, which created an .hbk file. I searched for a solution, but the only one I can find consists of putting this file on another HTC phone and recover the messages this way.

As I have no intention to buy a new HTC phone just to get my messages, how do I extract the contents of the .hbk file on a PC (Linux or Windows)?


问:
Preferred Network Type Settings
I am on Miui and the default setting for the Preferred Network Type doesn't want to save. I want to change it but when ever I close it it won't save. Anyone knows how to fix it?</p>

Title: Preferred Network Type Settings


问:
How to Limit Number of Recent Activity Screens
I'm amazed that A) I haven't looked for this sooner, and B) I couldn't find something that does this.

I simply want to limit the number of recent activity screens (cards) that appear when I hit the □ button.

EDIT:

My phone is an non-rooted LG Stylo 3 Plus, Android version 7.0 Software version TP45010m.

(Also, if anyone knows how to root this phone specifically, I'd like to hear it... I haven't been able to find a method that works for LG Stylo 3 Plus and have seen that this phone specifically is unable to be rooted.)

**

TL;DR:

Any time my 80-year-old mother asks me to help her with something on her smartphone (Does the day of the week end with "y"?), I tap the □ button to see her recent screens. She generally has like 47 recent cards listed there, as she never swipes them away or clears the list.

I'm aware of the concept that (generally speaking) these are more or less shortcuts to apps that have run, and that they (generally) use no memory while sleeping in this state, so swiping them away often won't conserve significant resources.

I'm also aware that I can "CLEAR ALL" cards (the button can be seen in my animation), but I don't want to do that, either.

The problem is that this is supposed to be an "easy" way to jump back and forth between apps that you use often, right? Doesn't it defeat that purpose if there are 47 cards to look through? Easier just to find the app in the app drawer and "restart" it.

I looked, first on playstore, then just searched the internet at large for something that would simply limit the number of recent cards on that screen to, say 5. Whenever you have 5 cards (or 10 or whatever) and you open a new app, the oldest would disappear.

I found a bunch of stuff that would "kill" an app or all apps, but this is counterproductive in my case, right? Doing this would reduce battery charge life because I would be using resources to turn it off, then use more resources to create a new instance of it the next time I want to use it—as opposed to just letting it sleep, where it uses very little resources and comes back to life quickly.

Bonus, same thing goes for her Chrome browser. 63 open tabs??!!??!! I found how to close all open tabs, but it would be nice to only have the 5 most recents there and remove the older ones.


问:
Taking out of silence after x missing calls from specific person?
I'm using silent/vibrate mode most of the time, however, I do want to be notified by a ring if a specific user/s called me more than once

Is there any setting or app to help with this request?


问:
Explore files using Android Studio
Is it possible browsing the device filesystem with the current version of AS? I've read that in the menu View > Tool Windows > Device File Explorer there should be the suitable tool, but I cannot see anything.

Title: Explore files using Android Studio


问:
advert web pages opened on phone by bg app
I have some unwelcome behavior on my Samsung S4 AOS 5.0.1 (unrooted) phone. A few days ago I start to get attempts to open my web pages (up to 3 times a day so far) while my phone is idle. All cases have been bit.ly links for example:

```<code>http://bit.ly/2KG1tdA+ -- http://www.gohoi.com/jaguar-xj/
http://bit.ly/30muksQ+ -- http://www.gohoi.com/lincoln-mkz/
http://bit.ly/2nVdS4m+ -- https://t.co/leK1JpzypD
http://bit.ly/34WUUeL+ -- https://fb.itfactly.com/?url=https://l.facebook.com/l.php?u....
</code>```

As I have no default browser I was able to capture URL and add "+" to end so I can get the detination URL on bitl.ly stats page as shown above in 2nd column. The first link went to at least 0.5 Million devices so somebody out there must have run into this phone abuse.

Is there anyway to trace what process is triggering the open web request (eg using logs, trace tools etc), so I can uninstall the app or disable it if it is builtin. Could it be "Peel remote".


问:
Google Pay hidden & its device admin

I cannot locate Google Pay on my Z971 ZTE phone in Apps, system, hidden, etc, however it is a device admin. If I attempt to click on it to remove it as an admin, the settings app immediately pops up a msg box - "settings has stopped". Trying to find an answer, I've attempted searches in FF & Duck but the results were rediculously unrelated.

Quite some time ago I stopped updating all google apps & disappointedly learned several apps cannot be; stopped, uninstalled or disabled!

Title: Google Pay hidden & its device admin


问:
Enable and disable system overlays with shell command
I'm trying to create an automatic Dark Mode using Tasker, which would work disabling overlays (to get a default light theme) and enabling others (to get a dark mode). For the light theme I run cmd overlay disable --user 0 + package name

However, when i try to use com.android.system.overlay.dark (an overlay that comes with my custom ROM) it changes it for a moment and gets back to how it was before.

If I do cmd overlay list | grep dark, I can see for a moment that it does get disabled, and enables itself again. When i run cmd overlay enable it does the same, enables and then disables the overlay.
I also tried running the command with su

If I change the theme from the ROM settings, everything works fine. Also, the command works with other overlays from substratum themes and some settings overlays that come with the rom.

Im using HavocOS 2.9, with android 9.0

Can anyone help?


问:
Why do I have to always clear the cache of the Download Manager in order to download 1 app?
I'm using a Samsung Galaxy J4 Core with Android 8.1.0 Go. When ever I want to download an app on Google Play, I first have to clear my data/cache for my Download Manager and restart my phone. It then takes a very long time to even start the download... I'm not sure why I'm getting this bug.

Edit 1: If I don't clear my cache and restart my phone, no apps will download/update. It will just say "waiting for download...". Before I even thought of clearing my cache, I waited 3 days for my download to start...

Edit 2: I have 6GB free on my internal storage (max. 16GB) and 2GB on my 16GB SanDisk Card. I have 1GB RAM, though for some reason, 560MB is used all the time.


问:
How to determine what's causing Chrome to consume cellular data
Short: How can I know why my Android Chrome consumes so much data - which sites, maybe some rogue plugins etc.

Background: Recently I've been getting notifications from my carrier and also from my phone that I've exceeded my 12GB/month data plan. Looking in "Mobile data use", I see that that almost all of the data was used by Chrome. I do use Chrome to listen to podcasts (I'm currently considering a dedicated app), but that hasn't changed recently, while data usage have skyrocketed...

What I tried:

I've looked at chrome://net-internals, which my chrome redirects to chrome://net-export, but that looks quite heavyweight to be running for days on my phone.

I've enabled Chrome's DataSaver/Lite Mode (I think it's the same? My phone is not in English, so not sure). It shows usage by site, but the usage shown there doesn't account for the excessive usage reported in mobile data use. The savings were miniscule.

I'm hoping there's some app/plugin/etc. that I can add to Chrome to summarize data usage. If this exists only for Firefox mobile, I'm willing to switch, though I'd rather not.

Device: Samsung Galaxy S7 (SM-G930F), Android 8.0, Samsung Experience 9.0, Chrome 77.0.3865.92.


问:
Is any way to lock Android KitKat to a certain frequency/band?
Normally we can lock our mobile to either LTE, WCDMA, or GSM thorough Network Mode option from setting. But I would like to lock specifically 900MHz and/or 1800MHz band, which they are included as GSM in the Network Mode. Then my question is: is any way to do that way? Prefer if I can do with command or script only without installing any application. But thorough application also will be fine too.</p>


问:
Recover photos from S6 Edge+ stuck in boot loop
I have a Galaxy S6 Edge+, Android 7.0 that did something weird.  I restarted it and now it's stuck in a boot loop.  I don't care if it gets wiped, but I want to get the pictures off it first.  It gets to the Samsung logo and hangs there for several minutes and will eventually restart itself.  In the meantime, I can connect via ADB and I would just pull all the files, but the data partition isn't mounted at /mnt/sdcard at this point.  I've tried the obvious, but no luck...

Stock recovery menu accessible

Wiping cache does not help

Cannot boot into safe mode

Firmware download mode accessible

Not rooted

USB debugging enabled

OEM unlock not enabled

I heard that flashing stock firmware would get it working again and not wipe the data partition.  If this is the way to go, is there a reliable source where I can find the image to flash?  I'm aware that the firmware is carrier dependent, so I want to know I have the right one.

I'm also aware of TWRP, but I believe the phone needs to be rooted to be able to recover stuff.  But maybe not for the data partition?  Can I install it without OEM unlock enabled?  This question mentions custom recovery, but I'm not sure how it got there (previously installed, or installed while boot looping).

I'm trying to get a clear idea of what I should do.  What is the best way to go about this?  I hesitate to do anything unless I'm sure it's not just going to wipe or brick the thing.  I rooted another phone before and the first attempt failed and wiped it.  I had backed it up, but that's not possible in this case, so whatever I do has to work.


问:
Create "dead space" beneath GBoard to move it up
I have bought a Samsung Galaxy A50. The problem is, that with the navigation menu completly disabled, as well as the almost completly gone bessel, the keyboard is way too far down for me to comfortably type.

I know that there is the float option for GBoard, but that doesn't really work for me, as the app gets full screen in the background, which makes it hard to see what you type or generally blocks information.

Is there some way to add dead space beneath the Gboard?


问:
file manager doesn't find folders
I am using a terminal, Termux, and Qute.
The terminal Qute shows me a path data/user/0/com.ddm.
In the file manager Cx File explorer I am not able to find them. In Android folder, there is a data folder with a lot of folders called com.something, as com.dropbox.android, but not the above cited folder, idem for folders of Termux. How can I find the wanted folders in file manager?</p>

Title: file manager doesn't find folders


问:
All contact names on device changed without user intervention
All of the contact names stored on my device got changed to "1 Null" without my intervention.

How can I get them back? Any ideas?


问:
How to recover unsaved video file on Android?
I've got a Samsung S9 phone and today I was taking a lot of photos and videos.

For one video we pushed record for about 30 seconds and then pushed stop. It appeared to have been recorded.

However, later today I check my photos and videos and the video is not there. Everything else is.

Is there a way to try to recover this video file?


问:
How can I automatically backup a file on my phone to my NAS running on my local network?
I have a NAS running and I can connect to it from my Linux machine (fstab):

```<code> //192.168.1.4/home/backup /media/nas-backup cifs vers=1.0,username=***,password=***,auto,iocharset=utf8,gid=1000,uid=1000,file_mode=0777,dir_mode=0777 0 0
</code>```

I'd like to set up an app to run on my phone and backup my photos and sms messages daily when my phone is on my network. I think I can accomplish a lot of this with Tasker. But the actually file copying, I'm not sure how to proceed. I hear Syncthing for Android is good but I can't find any documents about connecting it to to a CIFS mountable NAS.

How can I setup Syncthing (or a different program) to connect to my NAS and backup files on a regular basis?


问:
How can I expand an email thread Gmail on Android?
How can I expand an email thread Gmail on Android?

When looking at Gmail in a web browser I can do:

I'm looking for the same option for Android.


问:
What does the icon of a phone with “ID” written on it mean?
My friend is using a Samsung Galaxy Note 10 with Android 9.0 “Pie”. This icon appears on the notification bar.

The icon also appears as the picture of some calls in the list of recent calls on the stock dialer app, mainly when the number is not saved as a contact.

Let’s say 20 calls were showing on the call list:

17 calls were from saved contacts. These had a circle with the initials of the contact next to the call (e.g. John Doe will be displayed as "JD").

1 call was what looked like a saved contact - it had a name, not just a number. It had that icon next to it.

The last 2 are just phone numbers with that icon next to it.

What does the icon mean and when it is meant to appear?


问:
Remove brand from Wear OS Watch faces
I just bought a Fossil Gen 5 Carlyle. Before this, I used a Huawei Watch. I noticed they have a lot of builtin watch faces in common, so this must be builtin to Wear OS. The difference is, the watch faces on the Fossil watch show the Fossil logo, whereas the Huawei Watch doesn’t.

I don’t like having the brand name on my watch face all the time. Can it be removed (while using the builtin watch faces)?

Title: Remove brand from Wear OS Watch faces


问:
How to set ringer modes on Android 7?
In Android 7, where are the various ringer modes? They seem to have disappeared or been hidden. Before, in previous versions, it had 3 modes: Silent, Vibrate, Normal. Where have this icon and mode gone? </p>

OwnerDisplayName: atek

Title: How to set ringer modes on Android 7?


问:
Unable to open Wikipedia app on Android TV
I have Mi TV 4a pro and I want to open Wikipedia app on it. I had installed Wikipedia app on TV via pendrive but when I open the app it crashes. Is there is any way?

Further I had installed chrome browser on TV and when I search on it then it works fine and show results. But how can I open the links? Like when I search "mathematics", it shows Wikipedia link in results but how do I open that link? (As I have TV remote not a mouse to click on link)  Please help.


问:
Deleting apps from android phone that can't sign in
We have an old android phone that grandchildren use for play.  No SIM card, but on wifi.  The Google account previously used is obsolete, so we can't sign in.  But without signing in, the "play store" won't let us get to the list of apps to delete them.

We'd like to delete Contacts and the contact list, Phone and the list of calls and transcribed voicemails, and other things like that.

If we reset to factory settings, all the games disappear too, and we'd have to log in to a valid account to get them back.

And, I cannot find the settings! (Also want to turn off the unneeded cell radio to save battery.


问:
Delete personal data from phone that can't sign in to Google
We have an old Galaxy that grandchildren use for play. No SIM card, but on wifi.  The Google account previously used is obsolete, so we can't sign in.  But without signing in, the "play store" won't let us get to the list of apps to delete them.  And some of them need root to delete, and I don't want it rooted.

We'd like to delete things like the entire contact list, the list of calls and transcribed voicemails, facebook messenger stuff, etc.  Nothing to hide, as the saying goes, but no need to have curious little ones reading about deceased relatives, other peoples' phone numbers, things their parents did as kids, or questions on child-rearing.  :-). Or unintentionally tapping a name and sending an e-mail.

The method that I used on the Moto X4 that I lost in Spain a year ago for deleting messages doesn't work here.

If we reset to factory settings, all the games disappear too, and we'd have to log in to a valid account to get them back.


问:
"Urgent Results" from LG V30 Smart Cleaning
I have an LG V30 (on Verizon, but I doubt that's relevant) that's about a year old. A couple of weeks ago, it updated to Android 9.0 Pie. Ever since that update, about once every 48 hours, I've been getting a notification from something called "Smart Cleaning" that says

Battery draining app

Dropbox constantly ran in the background

If I click on the notification, my options are to restrict or uninstall Dropbox.

I'm perfectly happy with my device's battery life and would like Dropbox to continue running in the background. I've tried disabling notifications in the smart cleaning program's settings, but that's had no effect and the messages keep coming. I've also tried telling the phone to disable this notification permanently when it comes up, but it says "these notifications cannot be disabled". These are starting to get on my nerves, so what can I do to get rid of this recurring message? For reference, I've included an image of the screen that pops up when I click on the notification.


问:
Galaxy Tab S3 suddenly can't support SD cards
After the Sept Update (now shows "Software update to T827VVRU3CSH4), my Verizon Galaxy Tab S3 stopped "supporting" the SD card that I've been using for the past year or so.  It now does 1 of 2 things for all SD cards:

Displays a message "Unsupported SD card".  "This device doesn't
    support this SD card.  Tap to setup in a supported format".  I've tried formatting the same, previously working SD card a few times now, but no luck.
I've also tried 2 other SD cards, but they too cause the same, repetitive formatting prompt.

Doesn't recognized at all

Has anyone else experienced this recently?  I'm wondering if it might be a bug in the recent update, or something specific to my tablet + SD cards.


问:
Droid Turbo 2 storage doesn't clear
We often get out of storage messages on our Motorola Droid Turbo 2 phone. We delete an App, and, say it's a 100 MB app, we only see about 10 MB free up. Likewise we've transferred and deleted gigabytes of pictures and videos from the phone, but only a tiny amount of space gets freed up. We're deleting and deleting and deleting, but we still have no room.

Right now, looking at "Internal shared storage" - It shows 23.27 GB used of 24.06 GB but only 5.06 GB used for Apps and 7.32 GB used for imaged, 18.73 MB for videos, 0 for Audio, 475 MB for other and only 1.34 MB for cached data (so it's not cached data). Those don't add up to anywhere near 23.27 GB! Apps and Images numbers go down as we delete, but the total GB used barely moves!

What is happening? How can we get our storage back?

Per Robert's comment, we downloaded Disk Info, screen shot below. But, all it did was show that we used most of the "Data". There's no insight as to what is using it, or why as soon as we delete apps, photos, and videos, most of the amount we just freed appears to be instantly taken back up.

Title: Droid Turbo 2 storage doesn't clear


问:
Get raw app usage data
Android seems to keep a log of the past week of app usage. It seems that there are many applications that are able to get this "App usage" permission and by querying some underlying api get all the app usage data from your phone. It shows launch times and duration of specific applications. Some applications that can read these data are: https://play.google.com/store/apps/details?id=com.a0soft.gphone.uninstaller and https://play.google.com/store/apps/details?id=com.huybn.UsageHistory. While it seems that many of these applications have ways to export this data I was wondering if there was a way to export this data without an app as the above apps each have an export format that really can only be read on the android phone.

TLDR; Is it possible to grab Application Usage Data via ADB or as a file on the internal storage (maybe in /data/system/something?)

Title: Get raw app usage data


问:
App whitelist in stock android
Is there a way to create a whitelist for apps in stock android?

Ie. I would like to limit what apps are possible to launch, for example by password protecting them.
Anything resembling kiosk modes or family locking is of interest.

If possible I would like to accomplish this without third party apps.

Title: App whitelist in stock android


问:
the EZ file explorer ftp on huawei pro 20 android 9
So i am trying to transfer some files from my pc to my android and both filezilla and the standrad windows explorer ftp wont connect i tried the 'wifi ftp' app on android store too but it wont connect to that either? using windows 10.</p>


问:
Methods to modify Ambient Display
I am trying to modify Ambient Display as the one in my ROM is missing on some features, such as Pick up and Hand Wave gestures.

I have researched a bit and found that Ambient display feature(s) reside in SystemUI.apk and framework-res.apk and I have successfully pulled them.

Is there any way to integrate/enable the features?

Title: Methods to modify Ambient Display


问:
How to switch on Samsung Galaxy when Power Button jams?
Since my smartphone's casing is so tight, I had to press the buttons harder, until the power button got permanently stuck. Now I dont't know how to switch on my Samsung Galaxy without using its power button. </p>

<p>I already tried booting into the "download mode" but it does not work. </p>


问:
Galaxy S firmware before Value Pack
Can someone tell me which was the previous version of Galaxy S firmware before the current/latest Value Pack (XXJV4)? I am considering to downgrade, but I am not sure about version/code of that. Thanks!</p>

Title: Galaxy S firmware before Value Pack


问:
How to get shared files from Windows on Android through the Internet?
I have a Wi-Fi router in the home. My PC constantly connected to the router, and it's IPv4 is 192.168.0.100 (static). Also I always know a global IPv4 of the router (NAT is disabled). On the PC I have a shared folder through the SMB protocol.

I have an android device. I want to get access to the shared folder on my android device, when it is NOT connected to the my Wi-Fi (for example in the office or university). I also can connect to my VPN server from my Laptop (it is not a PC) in such places.

Now, what I decided to do? I decided to up the OpenVPN server on my PC, and connect to it from my android device through the Internet (Of course when I'm not at home) to emulate the connection to my Wi-Fi local network.

If the VPN server is setup to the TAP mode, I can get access to the folder on my Laptop, when I connected to the VPN. If TUN - no. But access to the folder on the Laptop isn't interesting me, I want to get access on my android device, but it doesn't support TAP mode. In TUN mode I can connect to the VPN, but cannot get access to the folder (on a Laptop and on Android). So the question is - how to activate the support of TAP mode on the android OR may be you know another solutions instead of using VPN?


问:
How to remove a large sim card from a Samsung Galaxy S8
Someone put a large size SIM card into the card slot of my Samsung Galaxy S8 without using the tray. How do I get it out?</p>


问:
How to restore backup taken using stock recovery?
I have an unrooted Coolpad Note 3 lite. I backed up user data using recovery. However, I'm not able to restore from .backup file.

I only have Windows in my PC.

Is there any way i can restore from .backup file using ADB COMMANDS???

Is there anyway I can restore from that backup file, preferably without rooting?


问:
WIFI disappears until reboot
Ok so I've encountered this on multiple devices across multiple networks so I'm 90% sure it's an issue with the core OS but it's been happening for over a year and hasn't been fixed at all.

About once a day my device will drop its wifi connection and when I open the wifi settings page it cannot scan/locate any nearby networks for me to join. It just kinda hangs saying that it's searching for nearby networks but it never shows me anything (even though I know there should be about a dozen nearby since I live in an apartment style building). Toggling wifi on/off does not help, nor does toggling airplane mode. The wifi settings page remains empty no matter what. The only solution I have been able to find is to do a full device reboot then everything works fine for another day or two.

I've encountered this on both the google pixel slate (worst purchase ever, returned it) and a OnePlus 7pro. The behaviour has been identical across both devices.

I've read some old articles saying to disable ipv6 support but I don't even have that option on the OnePlus phone (and honestly I wouldn't be happy if that was the solution).

I'm a senior software engineer at a major tech company and I can't figure this out and I can't get any legitimate help from the companies behind these devices. What can I even do?

I am open to troubleshooting suggestions or if someone can help me gather debug information to submit a more official report that would be great. Right now I have no way to get official support, the people at oneplus are just giving me the usual runaround of doing a factory reset etc without even examining the issue... and google has worse customer support than comcast.

Title: WIFI disappears until reboot


问:
How to mount 100% ext4 sd in Android Pie?
My phone (Redmi 6A) is running Android Pie(MIUI). How do I mount a 100% ext4 formatted sd card, such that it would be seen by vold? My phone is rooted. I am not experienced with the android shell commands though, and my terminal emulator cannot run adb commands.</p>


问:
Phone not recognized by computers at all. No adb, usb, lsusb, fastboot
For over a year my phone had no issue connecting to my computer via usb cable. I could transfer files back and forth via adb no problem. It stopped being recognized about a month or two ago, So I've been using adb over network.

It doesn't even show up in lsusb.

I thought maybe it was the cable, so I tried a different cable.

I thought it was the usb port on the computer, so I tried other usb devices. Phone charges when plugged into computer though.

I thought it might be the connections of the cable to the phone and computer, So I cleaned them with alcohol.

I thought maybe the connections on the mainboard of the phone, So I pulled the phone apart and cleaned the connections with alcohol.

I thought maybe adb needed to be updated/reinstalled, so I did that.

So here's my predicament. I was updating LineageOS and there was a problem with the firmware so I reset my phone without thinking. That deleted all my files on the sdcard as well as the system. So I'm only able to use twrp (recovery, no OS). But the phone should be able to mount still since twrp allows MTP.

Any ideas what I can do to get the phone to be recognized by the computer.

Stats:

phone: OnePlus 3T - up to date TWRP only, formerly LineageOS

computer: Ubuntu 18.04, up to date adb and fastboot


问:
Is ROM of both P60 & P70 variant of Realme 3 same?
Realme 3 (a device by oppo) is available in the market in two variants - with Mediatek P60 and Mediatek P70 chipsets.Global variant comes with P60 and Indian variant comes with P70 Model no of P60 is RMX1821 and model no of P70 is RMX1825. Now the question is - are ROM of both chipsets same? In Realme's official site file version of given ROM for this device is 'RMX1821EX_11.A.22' , which appears that this ROM is for only RMX1821(Mediatek P60) device. If I flash this ROM in RMX1825 (Mediatek P70), will it work properly? Or is there a different ROM available or P70?</p>


问:
Why does my android use so much ram?
I recently bought a realme xt phone 8gb ram varient. I usually get only 4 gb ram free and rest of the ram used by system. So i want to know that it's usual for 8gb ram system to take up to 4 gb ram for system process.

I attached two screenshot taken from the 'developer options -> running services'

Title: Why does my android use so much ram?


问:
Backup Android to PC over P2P WiFi connection
I want to automatically backup my Android (at least the media files) to my PC over a WiFi connection when both the Android & PC is connected to the same WiFi home network. It should probably be possible to transfer the files directly P2P without needing to store them on some unknown server somewhere. Preferably, I want it to happen fully automatically when it connects to my home WiFi & I have my PC running, so I don't even have to think about doing backups anymore.

I have been searching for the solution, but the closest solution I have found so far is some apps that create a local FTP Server on the phone, where I potentially can manually pull the media files out of the phone from my PC, but I haven't managed to establish a working connection with any of the apps so far.

Is it possible to backup Android to PC over P2P WiFi connection automatically?

Edit_1:

Android 8.0.0 (not rooted)

Windows 7


问:
How to clear android cached .apk data
I'm developing a mobile application for android and testing with a physical device. I have two versions quite different but same name etc. When I deinstall one apk to test the other, the old one is reinstalled. So my question is, how do I clear this cached data ? and why android keeps in memory an application when a user asks for it to be removed ...</p>

Title: How to clear android cached .apk data


问:
Bypassing FRP on SM-T567v Samsung Tab E Questions
My company currently has 70 Samsung Tab E's (model # SM-T567v) that are FRP locked that we are trying to repurpose but are currently not able to. I have 1 tab e that is currently unlocked.

I have watched and tried every youtube "solution" to bypassing the FRP I could find. None of them work. I and I cannot find the firmware version T567VVRU1CQHD to download and reflash with odin. I have tried a couple of software solutions like imyfone lockwiper but even that comes back saying cannot find country and firmware version.

Is there anyway I can essentially make an image of the one working tablet, put it on a micro sd card and then essentially reimage all of the other tablets? Would I have to root the devices? Can I even root the devices if FRP locked out?


问:
Android 9 on Sony Xperia XA2 not accepting any incoming connections on WiFi
I got an XA2 and did all the updates, which gave me Android 9. I have a few other Android devices but all on versions 6 to 8.

I routinely use FTP servers on Android devices to get files onto them. And it always worked - but on this one, does not work. I start WiFi FTP and it says it has started but the PC can't connect to it.

Upon some forum advice, to see if the issue is with the FTP protocol, I installed Asus File Manager, which accepts HTTP connections for remote file transfer. Still no connection.

Moreover even a ping does not get through!

However, the phone successfully uses the Internet over the WiFi connection. It is also listed in the router's list of connected devices, though it is shown as having no host name, while other Android devices have host names.

So how can I get Android 9 (on Sony Xperia XA2) to accept incoming connections on WiFi/make FTP servers work? Or is this just perma-disabled in Android 9 and/or in Sony's mod?


问:
Mystery status bar icon (handset plus wifi signal indicator)
As the title says, does anyone know what this icon means? Just upgraded to a Samsung galaxy s10, but it's not an icon I've seen before. It sits between the wifi and cell signal strength icons.

Edit/Answer: To summarise the answer found in the above link, this icon indicates that "wifi calling" is enabled. I've noticed that the icon will appear and disappear depending on how close you are to your router, presumably because the wifi calling feature requires a good signal.


问:
How do I turn off suggestions to uninstall unused apps?
Google Play Store prompts me on a regular basis to uninstall unused apps. This prompt is a little bit dangerous because without much thinking, I could tap the confirmation dialogue and uninstall apps which I am using rarely, but do need. How do I turn off these suggestions?</p>


问:
Suddenly reboot
I am still using an old Moto G (2013)
It works quite well.
But sometimes it starts to behave as if a Power button is pressed - Power button menu appears, and then reboot is started, without any activity of mine)
I supposed, there is something about a mechanics in power button.
But, when I press the  button of charging phone it just splashes showing it is charging without a sign the button is working wrong.
The question :
Is it hardware or software problem?
If software, then could you guide me to file, where i can find log of booting
Thanks a lot!!</p>

Title: Suddenly reboot


问:
Why does my Samsung Galaxy S keep crashing/slow performance?

Possible Duplicate:

  My device is getting slow, apps start misbehaving/crashing. What can I do?

I have a Samsung Galaxy S which I've had for less than a year now. It has been working fine until the last couple of weeks, when I've noticed the performance slowing down. I don't use many apps, but lately I've downloaded a few games and whatnot. One particular recent issue is that whenever I access the keypad to call someone, it closes down automatically without letting me finish typing out the number. Other problems include: mobile internet crashes systematically every other night (when I use it the most); the FB app force closes automatically and since FB is an integral part of Zynga games, my Words with Friends is almost inaccessible because of FB crashing.

Anyone else with similar problems? I know HTC issues an automatic software update, but why haven't I heard of anything for Samsung?

Any help would be appreciated.


问:
How to get rid of grey error/alert message popup (toast)
I keep getting grey pop-up error messages from an essential app I don't want to uninstall ("xDrip+: No sensor found"). The messages keep displaying outside of the app which is annoying. Is there a way to disable those messages?

I tried finding that out myself but I couldn't even find what this element is called. Any help, even just saying what this message type is called by Android would be a step forward.

I'm quite surprised that apps are allowed to display those intrusive messages whenever they want.

edit: The alert is called a toast.