问:
Determine power usage for specific timeframe
Under battery usage, I can see “battery usage since full charge,” broken down by app (and, if toggled on, non-app phone processes). I’d like to see that breakdown but in a more specific timeframe (and, if possible, prior to my last full charge).

The phone is a Motorola “moto g power” running Android version 11, security update June 1, 2021.

Context:

Last night, I went to bed with my phone at 49% (I checked because had been a bit since I charged it); this morning it was dead. The battery usage graph showed four days of steadily-declining battery, to just under 50% as I saw it last night, followed by a nose-dive to 0% in a few hours. The breakdown of usage showed about a third used by Firefox (makes sense, that’s the overwhelming majority of my usage of the phone), about a third used by “mobile network standby” (which makes little sense, I have pretty good signal), and the rest divided among a bunch of different things.

My assumption is that Firefox was the dominant usage over most of those four days, and mobile network standby is what caused the precipitous drop last night. However, I don’t know that—it could be that mobile network standby is always draining my battery more than I think it is, and something else (probably increased usage by Firefox?) last night caused the drain.

Question:

Is there any way to get that same battery usage breakdown, but for just those hours last night, rather than “since last full charge”? For that matter, I have since charged the phone, so now it displays no data since it just charged—is the record I described above just gone now?


问:
How to debug dysfunctional internet access on mobile data?
On a new Shift 6mq with Android 10 (light version without Google services) apps don't have internet access via mobile data. Unfortunately I usually use WiFi so I didn't notice when internet vi mobile data stopped working.
Since I've fiddled with the system a bit (unlocked bootloader, installed Magisk + some plugins) maybe the best would be to first reset everything and start from a working system but I'm curious how to find the broken link, so maybe you give me some hint's how to narrow down the problem generically.

Here is what I'm observing and what I already tried:

Apps don't have internet access via mobile data but they do via WiFi

I cleaned the sim card and tried it on another phone

therefore I rebooted the phone

mobile network is activated, airplane mode deactivated

in system settings mobile data seems to be working, carrier is shown, no problems reported

data saver is disabled

Data usage is 0 bytes which looks like even system layer has no access

Magisk, AFWall+, XPosed deinstalled

Check your APN settings - maybe you have to transfer them from a working phone

Now, are there any further things I can check to find the root cause? Maybe via adb shell?

ContentLicense: CC BY-SA 4.0


问:
Blocking torrent in Android
Is it possible to completely block torrents in android?
I have tried to use many porn blockers like BlockerX, Remojo etcetera. I can block the torrent websites by blocking the keyword - 'torrent' .But there are many torrent search apps like Torrcrow and Torrent Revolution which can still fetch the torrent results. I also used SafeDns to block it but they all seem impotent.

Can we block torrent downloading at system level? Like making it impossible for torrent client to connect with peers or disallowing the torrent search in different apps.

Any suggestions would be greatly appreciated. I want to bolster self control that's why I need to implement this feature.

Title: Blocking torrent in Android


问:
Is date safe in encrypted phone without passcode
If my phone does not have a passcode, but is encrypted by default, and I factory reset it, is my data safe? Or is there a way someone can decrypt it since it had no passcode</p>


问:
Samsung infinite scroll apps
I recently bought a Samsung smartphone which has its OneUI.
App drawer has horizontal scroll, but does not support infinite scroll. Is there any setting or an app I can install to get the infinite scroll?

To elaborate, in the app drawer, apps are arranged on different pages, with 4 x 5 apps per page. Suppose I'm on the last page, and I want to open an app in the first page, I'll have to scroll left all the way back to first page and then open the app. If infinite scroll is enabled, I can just scroll right and it would bring me to first page.

Title: Samsung infinite scroll apps


问:
How to trust a Root CA for VPN use on Android 11
I want to connect my Android 11 phone to a VPN. The VPN is authenticated by a certificate signed by my own Certificate Authority (very typical).

I load the Root CA on the Android device by importing from local storage and the Root CA shows perfectly fine in the UI.

However, when connecting to VPN, the logs I get show that it can't validate the VPN server because it's certificate can't be validated because the Root CA isn't trusted.

Yet, the Android settings UI shows it is trusted.

The exact log message I get with logcat is:

```<code>received end entity cert "CN=xxxxxxxx"
received issuer cert "C=US,ST=......... CN=Intermediate CA"
received issuer cert "C=US,ST=......... CN=Root CA"
   using certificate "CN=xxxxxxxx"
   using trusted intermediate ca certificate "C=US..... CN=Intermediate CA"
checking certificate status of "CN=xxxxxxxx"
   using untrusted intermediate certificate "C=US..... CN=Root CA"
checking certificate status of "C=US.... Intermediate CA"
   self-signed certificate "C=US.... CN=Root CA" is not trusted
</code>```

That does not make any sense as both the Root CA and Intermediate CA are loaded in the user's trusted CA store.

The certificates were created with OpenSSL, have the CA=True flag, etc.

Anyone knows how to get that to work?


问:
Headphone mode keeps toggling between ON and OFF on its own. How to fix this?
My Xiaomi phone keeps switching from "headphone mode" to "normal mode" constantly (~2-3 times per second), completely on its own. This persists even if headphones are actually plugged in.

Before this is marked as duplicate, questions like this one and many others on the internet have the issue where their phone is stuck in headphone mode, not toggling on its own, so the solutions therein don't work.

I tried:

Cleaning the headphone jack

Plugging headphones in, turning the phone OFF, then ON, and unplugging.

Downloading "toggleheadset" apps. These work in the sense that if headphone mode is ON it switches it off and viceversa, but 0.2 seconds later it changes again on and off and on and off and on and off...

There must be some way of "disabling" the headphone jack completely (I have a Bluetooth headset so idc). Resetting the phone should be a last resort, and I don't think it would fix it.

Edit: following beeshyams' comment I went into Safe mode, but the behaviour persisted. I tried "disable headphones" apps but they did nothing. Finally I did a hard reset, but this didn't fix it either :/


问:
Storage isn't loading
I'm trying to clear up space to install Snapchat, and I have no apps to uninstall. So I go into settings to clear space from some apps. I load the "Apps" setting in the storage settings. The screen loaded, but all the apps say "Calculating" under them. And I can't clear the storage in the apps. If anyone knows how to fix this, please let me know. Thanks!</p>

Title: Storage isn't loading


问:
Network unlock a never-activated phone
I currently have a Motorola Moto G6 Play that was originally purchased 3 years ago from Virgin Mobile USA (which doesn't exist anymore), and was never activated. Interested in getting it network-unlocked, I called Boost Mobile (which acquired Virgin Mobile USA's assets), but was told to do that I'd first need to activate it for at least 12 months as per their contract.

Is there any way around that requirement? Does such a contractual requirement to activate a phone before network-unlocking it last in perpetuity, or does it expire at some point? It's pretty unclear what the helpline person was telling me in this regard.

Title: Network unlock a never-activated phone


问:
Notification showing on my android without a specific App
I have a Xiaomi Note 9s phone updated with the latest security patched running

MIUI Global 12.0.4.0(RJWMIXM)

Android version: RKQ1.200826.002

Android Security Update: 2021-07-01

I am getting a notification on my phone that does not specify which app is sending it. It looks pretty phishy and I have not tapped it yet, afraid it might be from an attacker or a virus. Especially that it is titled "Delete User" in Arabic. I have taken a screenshot and added to my question here. The Arabic title translates to "Delete User and the body translates to "Listen to your own voice"

I tried to block it but it cannot be blocked as every time I click on "more settings" it displays a message saying "the app wasn't found in the list of installed apps".

How is it possible that I receive a notification from an app that isn't installed on my phone? and could this be an attacker? I tried using the built in security scanner and it said there are no viruses.

What should i do to get rid of it?


问:
Auto IMEI randomization in Android (like WiFi MAC randomization)
How do I set the IMEI number to automatically randomly change every time I connect to a cellular network?

Android 9 introduced a feature that was a huge boon to the privacy of Android users: WiFi MAC Address Randomization.

https://source.android.com/devices/tech/connect/wifi-mac-randomization

Starting in Android 8.0, Android devices use randomized MAC addresses when probing for new networks while not currently associated with a network. In Android 9, you can enable a developer option (it's disabled by default) to cause the device to use a randomized MAC address when connecting to a Wi-Fi network.

In Android 10, MAC randomization is enabled by default for client mode, SoftAp, and Wi-Fi Direct.

MAC randomization prevents listeners from using MAC addresses to build a history of device activity, thus increasing user privacy.

As stated, this feature is enabled by default in >= Android 10. So now when you connect to a WiFi network, the owner of the WiFi networks are less able to track your activity between networks.

MAC addresses are the unique identifier of the hardware device that connects to a WiFi network.

IMEI numbers are are the unique identifier of the hardware device that connects to a cellular network.

While this change in Android 9/10 greatly increases a user's privacy on WiFi networks (ie MAC randomization), I've seen no such improvements to increase a user's privacy on cellular networks (ie IMEI randomization).

IMEI randomization is especially important in-light of recent research discovering that loads of PII (including IMEI numbers) are being uploaded to both Google and Apple on average every 4.5 minutes

https://www.scss.tcd.ie/doug.leith/apple_google.pdf

Abstract — We  investigate  what  data  iOS  on  an  iPhone  shares with  Apple  and  what  data  Google  Android  on  a  Pixel  phone shares with Google. We find that even when minimally configured and  the  handset  is  idle  both  iOS  and  Google  Android  share data  with  Apple/Google  on  average  every  4.5  mins.  The  phone IMEI,  hardware  serial  number,  SIM  serial  number  and  IMSI, handset  phone  number  etc  are  shared  with  Apple  and  Google. Both  iOS  and  Google  Android  transmit  telemetry,  despite  the user  explicitly  opting  out  of  this.  When  a  SIM  is  inserted  both iOS and Google Android send details to Apple/Google. iOS sends the  MAC  addresses  of  nearby  devices,  e.g.  other  handsets  and the  home  gateway,  to  Apple  together  with  their  GPS  location. Users  have  no  opt  out  from  this  and  currently  there  are  few,  if any,  realistic  options  for  preventing  this  data sharing.

Similar to the WiFi MAC randomization feature, how can I setup IMEI randomization? If this is not currently possible, when is it being planned to be added to AOSP?


问:
Couldn't unlock phone and stuck in a reboot loop after my battery completely died once, sideload doesn't fix
So one day my Pixel 3a's battery died (and since I quite urgently need the phone) I force it to boot up (cause sometimes you can still juice out a few minutes) but as it booted up, the wallpaper displayed correctly but the date/time is wrong, when I drag down the control center it's blank (though it sometimes pop up fine, but I think just once), stuck within plane mode (though I doesn't turn it on prior the shutdown), battery showing blank while in power off it clearly shows it charged to certain percentage of battery, and unlocking doesn't do anything. Then after a while the phone just reboots itself again and now I'm stuck within this loop.

My first thought is to just re-install the system through adb sideload as perhaps something corrupted (as once in a while, after many reboot a recovery mode like notice will pop up stating that the system might be corrupted and if you saw this message multiple times, you might need to try factory resetting). But now I sideload the newest pixel 3a official image (11.0.0 (RQ3A.210805.001.A1, Aug 2021)) I'm still stuck in the loop I described above, I still can't unlock my phone and my phone just keeps rebooting it.

Previously (prior to sideloading) I remember recovery mode showing:

WARNING: Previous installation has failed.

Your device may fail to boot if you reboot or power now.

(Though it may be result of me for doing other thing like testing apply update from SD card or letting adb to timeout as I forget to download the image first.) But it seems that after sideloading the warning doesn't show up, so perhaps I did sideload it correctly? (So as getting a 0-return value) But still the issue persists.

But since I've gone to the newest version of the image, it seems that I couldn't downgrade it anyway. So is there any other way to solve my problem (besides factory resetting it as I kinda want to maintain the data within it, and I still couldn't access my data through USB currently).

I don't think I've enabled USB debugging prior this event, so unless enabling it is possible to achieve without needing to enter the system (like settings), otherwise it makes no help.

I thought sideloading official image meant the system will be re-install completely such that any corrupted file would be fixed. Is it the case? And since there seems to be no cache in Pixel 3a, does it means something other than system might have corrupted? And if so is there still hope to recover it?


问:
Note 20 Ultra, deleted files
I lost the ability to post on the other form of this question.

If the bottom comment is right and there is 0 chance of decryption or rooting the deleted data, how do police do forensic downloads?

Does the Samsung Note 20 Ultra have discard enabled by default? And if an app DB was deleted over 2 months ago, is this recoverable?

I know that Android trims/discards every 3 days, but I also assume it depends on whether the file system is set up for this. I need to recover deleted chats from an app that was uninstalled over 2 months ago then reinstalled from the secure folder. I have the PIN, so would data recovery be possible?

Title: Note 20 Ultra, deleted files


问:
How to I unlock the bootloader on an Honor 7s?
I've attempted to unlock the bootloader using the fastboot method using ADB tools on my pc, which have yielded no results. I open powershell in the folder containing all the ADB tools and run "adb devices". My phone (not yet in fastboot) shows up. I than run adb reboot bootloader and my phone opens up into fastboot. All my screen shows in that is fastboot FRP unlock. Than running fastboot devices yields no output and no following commands work. Am I doing something wrong?</p>


问:
Why does encryption doesn't work/apply to access device storage or Google photos or drive when we upload a file from device/cloud to any webpage/apps
Example : YouTube, Facebook, Instagram, Chrome ( any app )
If I'm accessing YouTube or any other app where I can upload content from Android device with or without the app lock features, whenever I click on add file, it doesn't ask for gallery password even though I have my phone's gallery encrypted with app lock, infact, in some apps even the hidden files also appear. What's the point of having app lock if anyone can access all the files through any other app's upload feature ? Does Android not provide any security or encryption facility to access  device storage when accessing it (storage) through a third-party app? Anybody can access Google photos, drive storage etc without any password if they have access to the device, doesn't matter whether the apps are password protected or not.
To explain further , in this case let's say my Chrome isn't password protected, if anyone has access to my device's Chrome browser, they can access all of my content from Google photos, drive, phone's storage etc just by using any webpage's upload file feature. What's the point of keeping password pr applock to gallery / or Google storage if they're acceible like that?
Faced this issue is most Android devices ( Redmi note 5 pro, Samsung devices, Nokia, oppo, vivo etc.)</p>


问:
Which user-agent string is most optimal for use in ADM or similar download management applications?
I thoroughly comprehend what a user-agent string is, and how to spoof/parse them.  What I can't seem to find in the endless sea of search results that all speak about the same two aforementioned points is: which should I use?  For my use-case, it'd be specific to using Advanced Download Manager & Torrent downloader (ADM) on an Android device for downloading videos.  Which — if any — would be optimal in terms of file accessibility, speed, stability, etc?  Which should be avoided in the practical sense?  I understand this is likely dependent upon the web developer's end, but in a more general sense I'm wondering if the UA has any inherent impact to these factors, if all else remains the same?

EDIT: to clarify, from my observations the typical use cases seem qualitative — whether a particular file is served or not, i.e., true|false.  I'm wanting to confirm there are no other functional impacts from the user's standpoint aside from whether a file is made available or not (disregarding build variants based on UA, so assuming for example's sake that they are identical).


问:
What is causing these elements/artifacts to be rendered as shown?

My wife changed my minimum width recently, but this hasn't broken browser rendering before in any of our previous devices.  Any ideas?


问:
Apply system wide screen rotation
I've recently replaced a screen on my phone and it displays images slightly rotated. It's just a couple of pixels but it's really annoying.
I was wondering if there was some setting or API method to rotate whole system image, not just a single view image?</p>

Title: Apply system wide screen rotation


问:
Are there any ports opened on an Android device by default?
Title says it all.  Looking at a Samsung S10 phone and would like to know if there are any ports opened on device by default?</p>


问:
Missing photos after inserting external sd card into Samsung galaxy Tab s6 lite
I want to appologize in advance if this is the wrong forum.

Whats the problem?

I am photographing on my fuji xt4 and wanted to transfer all photos to my Samsung galaxy S6 Lite (using a basic card reader). The storage is correctly recognized and mounted. The first few times were no problem. However now all photos up from a certain point are not displayed/lost. Once inserted into the tablet the new photos and Videos are permanently gone (the camera doesnt displays them either).

Sony tough sd card 64gb (exFat)

Fujifilm xt4

Samsung galaxy tab s6lite (Android 11, not rooted)

What i tried

rebooting the tablet

reinserting the sd card

different card reader

accessing the photos by connecting to the camera via ptp is no problem

using more powerful file browser did not reveal anything new

I have currently no access to a normal computer and therefore cant properly investigate the problem further. I tried nearly all recovery android Apps but none scanned extertal USB storage. My last idea was to mask the card reader as internal sd card but Samsung seems to Block adoptable storage and any further advances in included formating the sd card.
My best guess is that my tablet is resetting the block-bitmap from the sd card to the state of the last time it was mounted.
Has anyone an idea on what is happening and what the best approach in recovering the lost data may be?


问:
Galaxy Fold: programmatically turn on the cover screen?
How can I programmatically turn on the cover screen (if the phone itself is actually unfolded/opened)?

Why would I do this?

(Some) Galaxy phones have the ability to charge your wearables via "Wireless PowerShare":

However, during this operation, the phone itself is unusable since it's facing downwards.

Wireless PowerShare is nice, but devices need to be aligned perfectly, otherwise charging will stop.

If I unfold/open the phone, it turns on the inner screen (and turns off the cover/outer screen), but PowerShare is not stopping, so this phone can charge my devices while being unfolded/opened.

Now, due to this, I would like to find a way to turn on the cover screen while the phone is opened because in this case, I can use it while it keeps charging my devices.

I know this is marginal, but this phone can actually use both displays simultaneously, i.e. during camera (cover screen preview).

So I'm looking for a way to force the cover screen turning back on after I opened the phone.

Update

I have recorded some Logcat during display switching, and while using both screens:

```<code>OPEN! (Main screen on, cover screen off)
2021-08-31 21:41:44.085 1107-2429/? D/PowerManagerService: [api] setDualScreenPolicy: dualScreenPolicy: 0 (uid: xxxx pid: yyyy)
2021-08-31 21:41:44.085 1107-1787/? D/DisplayPowerController: animateScreenStateChange: target=2, targetInternal=2, dualScreenPolicy=0

SCREEN DIM/LOCK? (phone is still opened)
2021-08-31 21:42:18.892 1107-1787/? D/DisplayPowerController: animateScreenStateChange: target=1, targetInternal=1, dualScreenPolicy=0
2021-08-31 21:42:20.141 1107-1787/? D/DisplayPowerController: animateScreenStateChange: target=3, targetInternal=3, dualScreenPolicy=0
2021-08-31 21:42:21.062 1107-1787/? D/DisplayPowerController: animateScreenStateChange: target=4, targetInternal=4, dualScreenPolicy=0

CLOSE! (Main screen off, cover screen on)
2021-08-31 21:43:55.490 1107-2429/? D/PowerManagerService: [api] setDualScreenPolicy: dualScreenPolicy: 1 (uid: xxxx pid: yyyy)
2021-08-31 21:43:56.203 1107-1787/? D/DisplayPowerController: animateScreenStateChange: target=1, targetInternal=1, dualScreenPolicy=1

SCREEN DIM/LOCK? (phone is closed)
2021-08-31 21:43:57.066 1107-1787/? D/DisplayPowerController: animateScreenStateChange: target=3, targetInternal=3, dualScreenPolicy=1
2021-08-31 21:43:58.068 1107-1787/? D/DisplayPowerController: animateScreenStateChange: target=4, targetInternal=4, dualScreenPolicy=1
2021-08-31 21:45:26.367 1107-1787/? D/DisplayPowerController: animateScreenStateChange: target=2, targetInternal=2, dualScreenPolicy=1

OPEN! (Main screen on, cover screen off)
2021-08-31 21:45:26.405 1107-2429/? D/PowerManagerService: [api] setDualScreenPolicy: dualScreenPolicy: 0 (uid: xxxx pid: yyyy)
2021-08-31 21:46:44.788 1107-1787/? D/DisplayPowerController: animateScreenStateChange: target=2, targetInternal=2, dualScreenPolicy=0

Use the camera app, which uses both screens (i.e. Main screen: ON, cover screen: ON)
2021-08-31 21:46:49.598 1107-1680/? D/PowerManagerService: [api] setDualScreenPolicy: dualScreenPolicy: -1 (uid: xxxx pid: yyyy)
2021-08-31 21:46:49.598 1107-1787/? D/DisplayPowerController: animateScreenStateChange: target=2, targetInternal=2, dualScreenPolicy=-1

Quit the camera app (Main screen: ON, cover screen: OFF)
2021-08-31 21:47:08.283 1107-2429/? D/PowerManagerService: [api] setDualScreenPolicy: dualScreenPolicy: 1 (uid: xxxx pid: yyyy)
2021-08-31 21:47:08.283 1107-1787/? D/DisplayPowerController: animateScreenStateChange: target=2, targetInternal=2, dualScreenPolicy=1
</code>```


问:
Check for the existence of files without root privileges
How do apps check for the existence of files and folders on /data and /system partitions without having root privileges?
I know some games and apps do this for anticheat and security reasons.</p>


问:
How to execute Android verified boot during first boot after updating OS in Android
I need to execute AVB (Android verified boot) during first boot after updating Android OS. BOARD_AVB_ENABLE = true is already present in the mk file device/hikey/common/BoardConfigCommon.mk in the external/AVB folder.

I want to know how to check if it is detected normally or not.

Execute AVB during first boot after updating OS.

How to detect AVB abnormal / normal detection to AOSP framework?

I am clueless where exactly need to proceed. Kindly guide me.

Reference which I have gone through: https://android.googlesource.com/platform/external/avb/+/master/README.md


问:
Why QR Code wifi sharing is not showing the wifi password?
I have access to some work-only android devices which they have access to the work wifi and I don't know its wifi password so I tried the QR Code sharing but to my surprize, the plain text which is generated from QR scan doesn't show the password. For comparison, I used this same work-only android device to connect to my hotspot generated from my phone and this time, QR scan from a 3rd device showed the password succssfully. Examples below:

a) plain text after scanning my hotspot:

WIFI:T:WPA;S:{my_wifi_name_written_here};P:{wifi_password_written_here};;

b) plain text after scanning work wifi:

WIFI:T:;S:{work_wifi_name_written_here};P:;;

So, what is going on here? Is this an advanced setting from network IT administrator? They use Cisco APs (access points) everywhere on my workplace, if that helps. Thank you in advance!


问:
Android 11 WPA Enterprise
There are a lot of threads about Android 11 and WPA Enterprise, but none of it seems to have a solution for my specific problem.

I'm using a UniFi WLAN infrastructure with a connected FreeRADIUS. Since I updated my phone to Android 11, I can't connect to the network. I read that the issue comes from the disabled "don't validate" option for WiFi in Android. But even if I import the right certificate (I tried to import the CA and the FreeRADIUS server certificate on my phone), I can't connect to the WiFi. I'm prompted to enter a domain on WiFi setup, but I don't really know what to enter there. I tried to enter the CN of my certificate/CA there, but this won't work either.

Here's what my radius is telling me:

```<code>Tue Aug 31 14:15:09 2021 : ERROR: (165589) eap_ttls: ERROR: TLS Alert read:fatal:unknown CA
Tue Aug 31 14:15:09 2021 : Auth: (165589) Login incorrect (eap_ttls: TLS Alert read:fatal:unknown CA): [anonymous@local.domain/<via Auth-Type = eap>] (from client UAPs port 0 cli MAC
</code>```

Does anybody know how to debug or solve that issue?

Title: Android 11 WPA Enterprise


问:
Resolve dns through proxy > ProxyDroid
Android device and rooted and using ProxyDroid App with HTTP Proxy
one of the main problem with ProxyDroid App is dns leak . it's ether showing my original DNS or Google DNS . i want to Resolve dns through proxy so that it match the IP address Country .

i already have another App can do that but the main reason of using ProxyDroid is to force global proxy for all installed app and it's the only app can do that as far as i can tell ,

this is the dns address in my device wifi connection and it looks like ProxyDroid is using them
DNS 1 > 192.168.0.1
DNS 2 > 8.8.8.8

i just don't know to what address should i changed them in order to resolve the dns through proxy . any help please ? Thanks

Title: Resolve dns through proxy > ProxyDroid


问:
Cant install apps from Play store or using APK file and MIUI storage calculates 0 free space
First time asking so please correct me if I am wrong,Also please suggest me title for this question

I have redmi 8 running miui 12 , Recently I cant install apps from playstore it keeps pending and after a while it show storage full . But I have plenty of space about 30GB out of 64GB . And when I try to install apk file , the package manager stop with a black screen and nothing happens .

I checked mobile storage and it display only "/"

After I click on storage it take about 4 minutes to calculate storage and then show actual storage that is "33gb/64Gb"
[![mi storage calculating storage][2]][2]

Edit -
The mobile also hangs a lot and it ram usage get high .  1 gb left out of 4gb
I tried debugging using adb and found that installd and system-server were consuming ram like 48% and 42%

Edit 2 - tried debugging (user app list generated by adebar)
https://pastebin.pl/view/91afe4ff


问:
Can't find .nomedia "folder"
I have a lot of folders that I wanted to hide, so I placed a .nomedia file in folder. I accidentally renamed a folder name to .nomedia. and BOOM all the folders including all images are hidden.

I tried "show hidden files" in file explorer/manager, Even ES file explorer can't find it. Images inside folder are in gallery (but not visible File format not supported or files are corrupted) and images location path are there but there is nothing.

I am pretty sure that I didn't deleted that folder(well at least I think, images are still in gallery but not visible), so I think my folder is just hidden.

How can I see the  hidden folder and images?

Title: Can't find .nomedia "folder"


问:
Power down USB on standby
I've been using USB keyboard and / RFID readers on a tablet (Android 8.1.0 on Samsung GalaxyView2). If the tablet goes standby, they keep powered, draining the tablets battery fast.

Is it possible by any means to power off attached USB OTG devices, when the tablet is on standby?

Title: Power down USB on standby


问:
adb shell settings put with default value... What is TAG parameter?
I want to set value and default value of a setting with adb shell settings.
But to set default I also need to specify the TAG parameter. What is this ?

put [--user <USER_ID> | current] NAMESPACE KEY VALUE [TAG] [default]

Can I specify anything or are there some "safe" values for TAG parameter? Where it goes?


问:
How to get information parameters from kernel after boot loads android?
when an (Android) bootloader starts loading kernel, it passes some parameters to the kernel (for example androidboot.verifiedbootstate, ...),how to get the information whether boot gets successful or failed and it should notifies to the user application?

I have gone through this article how it will communicate Verified Boot state to users? it means user application? Is there any sample application to communicate from verified boot state to user as toast message?


问:
What to look for in a phone that will be kept for many years?
I am asking this on behalf of someone who strongly dislikes changing their devices. What should I pay attention to when purchasing an Android phone with the intention to keep using it in the long term (at least 5 years)?

As you know, after a certain age, smartphones tend to start having problems, such as slowing down (perhaps to the point of unusability), lack of security updates, complete battery failure, and probably a bunch of other things I did not think of. It is also unclear if spending more (e.g. flagship vs mid-range) actually helps with longevity. This is where I need your help: advice in preparing for the future. I am not looking for specific model recommendations. Instead, I am looking for information about what features/properties to look for that will help the device function well a few years down the road.  This device will be for "normal" everyday use (i.e. calls, messaging, photos, navigation, social media, etc.)


问:
Can I give an app the permission to see my calls without allowing to read all my notifications?
I bought one of these cheap smartwatches (Xiaomi Mi Band 4c). To use it, I need to install the Xiaomi Wear app.

I really like the option to notify me when I get a call. This way I keep my phone in silent during work. But the app demands a Super Permission to read all my notifications. This would include bank transactions, personal whatsapp message, etc.

I don't trust Xiaomi that much to give them all that data. Does anyone would have a workaround? I want the app to be able to read my calls but not my notification.

You can see the description in: Settings -> Apps -> Advanced -> Special Apps Access -> Notification access -> select any app.

PS: I do have root access on the phone.


问:
Samsung stuck at boot Lineage OS boot animation after flashing GSI
My device is Samsung Galaxy A9 2018 (SM-A920F), A/B and TWRP unsupported. Therefore, I combined system.img (Andy Yan's Lineage OS 18.1 A/B), vendor.img and boot.img (both are stock) into a single .tar file and flashed it via Odin. It booted and said "encryption was unsuccessful" and asked for factory reset. I did it, it rebooted and stuck at Lineage booting animation.
Does anyone know how to resolve it?</p>


问:
Which format the system images for avd are in
After downloading an image for android virtual device via avdmanager there are system.img userdata.img ramdisk.img and kernel_ranchu in system images folder. Which format are they in and how to read/mount them outside avd?

My investigation so far:

As many people here and over the internet suggests they are sparse images. But they are nit. Simg2img hence doesn't work.
System.img is not a raw ext4 image either.

file ststem.imgreturns dos/mbr boot sector. With fdisk -l there are 2 partitions in the gpt partitioned image, labeled as linux partition.But setting up losetup none can be mounted. Even file -s doesn't recognize partitions. Interestingly first partition os from offset 2048 to 4096. Second is the rest.
These images are definitely not encrypted as strings returns readable data like app names script contents.

So I'm wondering what kind of filesystem that can be.

Ps: the sw apply for both google play and aosp devices.


问:
Doogee S88 pro Malware + install custom rom
I purchased the Doogee s88 Pro a year ago, and it is the perfect phone for my rugged lifestyle, except of the uncertainty of them installing malware / adware in their devices.

I'm trying to install a custom ROM, just normal android with SP Flash Tool, but I can't seem to get it to work. Is anyone able to give steps?

I have the following:,

AOSP,
ADB,
mtk drivers,
SP FLASH TOOL,
SCATTER FILE for device provided by manufacturer.

However whenever I try to direct the "boot" record in SP flash tool, I get a error saying "is this the correct one?" Which then I can't proceed.


问:
How can I forward audio from the handset mic to wireless earbuds
Im involved in a kind of cosplay where it's useful to have someone else relay verbal instructions from the sidelines. (Very heavy sound deadening helmet)

Because its in a small space, and I can't carry a handset, I can't set it up as say, a VOIP chat or call from their handset to mine.

So what I want is a way that I can pair some Bluetooth earbuds to a handset, and someone can talk into the handset mic, and it'll be relayed and played out on the bluetooth earbuds, which will fit discreetly under the cosplay. (I can modify the helmet to ensure space inside if needed).

Is that something Android can do natively, or does it need a visit to software recs stackexchange for an app to do it?


问:
Is android letting apps know I'm using VPN?
I'm abroad and trying to use my Norwegian app using a VPN, but somehow it knows I'm connecting though VPN and denying me to stream. (It's giving  a specific exception giving this exact information.)

Is it actually possible for the coders to use a function to let the app check this, or is it because the IP is a known VPN IP?

Obviously it's not in the user's interest to let apps know you're using a VPN, and I don't see a reason why apps should have access to check network settings on OS level.


问:
Wiping data on old j7 prime
My dads phone broked so he now is trying to use an old j7 prime he used before, the problem is the phone has lockscreen and he forgot the code, i tried entering in recovery mode but when i press Vol up+Home+Power it shows the SAMSUNG j7 prime boot logo and stays for a minute and then boot normally without booting in recovery mode, i tried booting in recovery with ADB but i cant activate usb debugging.</p>

Title: Wiping data on old j7 prime


问:
How can one list all large files?
One can list all directories on /mnt using:

```<code>adb shell ls /mnt
</code>```

How can one list all files which are larger than 100M in the directory /mnt?

```<code> adb shell find -size +10M ;
 sudo adb shell find -size +10M ;
</code>```

Both the above command encounter permission issue such as

```<code>find: ./dev/socket/property_service: Permission denied
find: No ./dev/pts: Permission denied
</code>```

Title: How can one list all large files?


问:
Chrome for Android's media notifications disappear
Chrome and other browsers show media in the notifications area automatically. I use to be able to switch apps and continue playing the media. Now, when the app is no longer active, the media notification disappears.

I don't know if I changed a setting somewhere or if an update broke something, any tips are appreciated.

Here's a similar question:
https://superuser.com/questions/1581481/firefox-stopped-playing-media-in-the-background

OwnerDisplayName: Jason K.


问:
Charging control in Android without using any third-party apps
Is there any way to control charging in Android programatically without using any third party Apps?

We have an Android Application which has to be installed at Client Location in Tab and the tab has to be charged and running continuously without getting tab turn off which leads to battery health drop. So We have to implement a solution in our app where the user can set some limit to charging to control even if the charger is connected physically.

(Example: If i set some 80% as higher limit and 20% as lower limit then the tab should get stop charging when it reaches to 80% and start charging when it reaches to 20% automatically).

I had been searching lot of resources and didn't found any solution to this problem.

There are few applications available on the Play store for this like "Battery Charge Limit" but I don't want to use any others apps to do this. I want it to include this feature in our app.

Can someone please tell me Is there any way to do this.

Thanks in advance.


问:
Is possible to extract app from original KDZ file?
I want to extract the Call/SMS App and the Remote controller App to install them in to a lineage OS version of the same phone.
I have a original KDZ and nandroid made it with TWRP bootloader.

The phone is not rooted. I was not able to do this.
The phone is an LG G4 H815 (T-Mobile)


问:
Termux find if microphone or camera is in use by other apps
I want to make a simple script in termux to find out if microphone or camera is in use by other apps.
You can suggest me any method , it dont have to be soley based on termux I just somehow want to get that info in termux script

Other details :--

Android version : 10

Root : no

ROM: stock miui(12)

Correct me if my question need more details


问:
Android app can see what kind of app installed on my phone
I privacy concern about my android 9 phone, my employer ask me to install app on my personal phone.

Can this app see what apps installed on my personal phone.

If I allowed to this app camera access could this access to my picture and files in gallery.


问:
Sign-in to Google account does nothing
I cannot add Google account to my Galaxy A5. I input email and password correctly, agree terms. Then the circle spins and nothing happens, account is not added. I cannot sign in to any Google stuff such as Gmail as well due to the same reason. I tried clearing cache of Google Play services but no help.</p>

Title: Sign-in to Google account does nothing


问:
Google won't stop asking me to agree to new features for text messaging
I keep getting the following pop up message on my phone.

"Faster, richer, higher-quality chat on Wi-Fi or data

To turn on chat features from Google, you agree to the Terms of Service. Google will occasionally verify your number by exchanging your device info with your operator. (SMS charges may apply.) Google's Privacy Policy describes how data is handled. Learn more."

I refuse to agree and select continue without new features but it won't stop popping up.  It is so frustrating.

Any suggestions?


问:
How can unlock the bootloader on the Honor 8C without unlock code?
The article describes how to unlock bootloader on honor-8c.

```<code>https://www.techdroidtips.com/honor-8c-unlock-bootloader/
</code>```

The last step is

```<code>And now to apply for your Honor 8C unlock code, fill in the necessary details ie, Product Model, Product Serial Number, Product IMEI or MEID, Product ID, and Verification code.
</code>```

I have apply for my unlock code,the huawei official technician says that it can't provider unlock code for long time.Is there another way to unlock the bootloader or root my Honor-8C then?


问:
Cannot connect to 2G/3G networks using Android 11-based custom ROMs
I've tried Android 11-based ROMs, such as BlissROM, HavocOS, and crDroid, on Redmi 4X (santoni), but none of them could connect my phone to 2G (GSM) or 3G (WCDMA) networks. I've confirmed that the said networks are working in my area. However, they could connect to 4G (LTE) almost instantly. So, my phone is stuck with LTE network which is more battery draining and doesn't penetrate well inside the house.

There was one ROM (ReloadedOS, Android 10) that did manage to connect my phone to 2G which I confirmed by sending and receiving SMS messages and cellular calls. So, is this an inherent problem with Android 11-based ROMs?


问:
How to help Android find weak WiFi signal?
There are a couple of places at home that are pretty far away from my router and barely have wifi connection.

That means if I go there with my phone connected to the network, I have a connection but if I loose the connection, the network doesn't show up in the wifi results. Then I have to go back to a spot closer to the router and "catch" the connection again and I can go back to surf from the original spot.

Is there a way to tell Android not to ignore weak connections in the search window?


问:
WIFI ON but Play fails "No internet connection. Make sure WiFi ..."
Recently i decided to check for app updates and Play refuses to work and popup the error "No internet connection. Make sure WiFi or mobile data is turned on."

However WIFI is enabled and internet work fine for apps like fdroid.

Maybe the issue is due to the fact that it is an old android 4.2 but  Play services were updated 03/2019 and they are v 15.0.90

Is android 4 still supported by Play? ideas? other app stores?

And there are no alternatives as LineageOS or custom ROMs for this device


问:
Unbricking a Samsung A40
I used Heimdall and I can't really finish flashing anything because I get this error "Error failed to send end session packet".

I also got the cyan screen saying "An error has occurred while updating the device software. Use the Emergency recovery function in the Smart Switch PC software".

I also get some red text a the top left of my screen that says "Custom Binary (Recovery) Blocked by OEM lock".

How to or where to find a Samsung A40 userdata.img file because I accidentally flashed the user data and not the recovery and now my phone is bricked?

Title: Unbricking a Samsung A40


问:
Widgets broke after restarting
I have a tablet (Samsung T805) and I have had a very annoying issue with it, since its very first day: every couple of restarts, happens that ALL widgets disappear from Home screens.

So I have tried different, several launchers, but the issue propagates also in them (tried Nova, Smart and Lawnchair), the best behaviour is in Go launcher Z, where the widgets boundaries are visible, and it is less painful to restore them.
In the others, they completely disappear!

This happens much often, usually every 3 resets/shutdowns.

I have tried several ways to avoid it, but no success!
It happened on Android OS 4, the very first one, up to 7, its actual LINEAGE version.

There are no memory full issues.
I do regularly a cache clean.

Here follows a screenshot of my Home screen:

Title: Widgets broke after restarting


问:
xiaomi redmi note 8T is stuck in recovery mode
My sister´s phone Xiaomi Redmi Note 8 Pro is stuck in the recovery loop. it went in the recovery loop and kept on rebooting again and again. If I select "reboot to system," then it gets back to recovery mode again. I try the option connect with MIAssistant but I recognize that she does not have unable USB sharing, so that´s why I cannot connect that phone to app Mi PC Suite via USB...
Is there any chance to save her images, contacts... because she does not save it on the cloud nor do she save them to Google Drive or any other file host, she only save them on the local drive on mobile.
Thank you for any answers :)</p>


问:
How can I configure Android's default phone calling application do that the screen doesn't turn off automatically after ca. 20 seconds during a call?
When I make a phone call using the speaker, the screen turns off after about 20 seconds after the call started.

How can I configure Android's default phone calling application do that the screen doesn't turn off automatically after about 20 seconds during a call?

I use the default Android phone call application on Android 10 with Samsung Galaxy S9.


问:
Is it possible to activate the flash while filming on some devices?
I would like to know if it is possible to turn on the flash while filming on some devices?</p>


问:
How to tidy up call-finished screen?
I have a Samsung Galaxy A21s running Android 11, One UI Core 3.1.

When I finish a phone call, all this crap shows up:

How do I get rid of all the stuff which is unrelated to the phone call?

Create note/checklist

Good morning

Fact of the day

Ads

I'm happy to see nothing or just return to the home screen. Ideally, I would be back in the phone dialer. How can I tidy this up?

Title: How to tidy up call-finished screen?


问:
How to purchase premium features of an Android app for a group of people?
For a research project, we are utilizing an app available in the Google Play Store to collect data. However, to do this properly, we need to provide all participants with the paid full version of the app.

One version would be buying Google Play gift codes and telling our participants to use them on the full version.

However, I was wondering if there is any alternative way to directly enable them to download the premium version such as buying the version for the Google Play user with the email address example@gmail.com.


问:
Can I block phone numbers based on the area code, preferably without an app?
I have a Pixel 4a, on Android 11.

Can I block phone numbers based on an area code? Preferably without an app, but happy to use an app if it's necessary.


问:
Can I connect a Pixel 2 XL to a monitor with USB-C input?
I have a Pixel 2 XL and am looking for an external monitor. If I buy a monitor that has a USB-C input and I connect the phone using a USB-C to USB-C cable, will the screen be displayed to the external monitor?</p>


问:
Disabling screenshots systemwide
How can I disable screenshots systemwide for every app? I'm running the Samsung Galaxy A51 with Android 11.</p>

Title: Disabling screenshots systemwide


问:
How to make it open in browser to click a YouTube video in the result of the Google search app?
If I remember correctly, clicking a YouTube video in the search result of the Google search app used to open YouTube in my default browser. For some reason, it now opens the Play Store link for YouTube. Can I prevent this and make it open in the browser?


问:
How can I download the last supported/compatible version of an app by knowing the Android OS version?
I have a very old samsung phone (Galaxy Ace) which runs Android Eclair. Surprisingly, Google Play and other apps still work and connect to the Internet, but there's a few problems. I had to hard reset it a few times, and all the apps I had were removed. Until last year or so, most of the apps were still compatible with my phone, but now they just can't be installed (they require a later version of Android I suppose, since it says "your device isn't compatible with this version").

So what I'm trying to do is to install every single app from an APK file, which I would download from the Internet. The thing is, I waste a lot of time looking for the latest supported version. This means I don't want an older version, I want the exact last version that was compatible. iOS has this feature, if you previously "purchased" an app you can actually download the last compatible version, but I don't know how to do this on Android.

Do I have to keep looking for the correct app version or can I get the last compatible version?


问:
Android 11 update
I use an Oppo A 54 and had received an update prompt that Android 11 update had been downloaded and if I wanted to install it now or later so I clicked on view more details and changed around a few settings. The moment I exited out of the app the Android 11 update had gone and it says my system is completely updated. I have tried restarting the phone but to no avail. I've just bought the phone probably 3 weeks back. Have I lost the update forever? I'm kicking myself right now for not clicking install now right away.</p>

Title: Android 11 update


问:
Is the data on flash memory encrypted or unencrypted?
I understand there was full disk encryption from Android 5.5 to 9. Not sure it was ever the default, and not sure what the default is now. I've bricked a Pixel 3 running Android 11, and I want to know whether something crazy like this flashfixers.com/recover-data-dead-phone-chip-off-data-recovery could recover the data.

I've tried everything else. The device is stuck in a freezing boot loop. I can make it to recovery mode, but sideloading an update through adb doesn't fix it, and I can't use adb to pull data nor fastboot to load TWRP, because I never unlocked the bootloader. Not ever sure unlocking was possible, because it's been on a Verizon payment plan.


问:
How to make Text Scaling in Chrome Accessibility work in non-desktop mode to make fonts smaller?
When I use text scaling and reduce it to 50%, it remains the same in normal mobile site mode. It only reduces the size in desktop mode.

Is there any way to configure this size? In Firefox, I can see much more content due to smaller fonts than in Chrome.


问:
Can the Samsung contact app be configured not to show suggestions when entering a new contact?
Can the Samsung contact app be configured not to show  suggestions when entering a new contact? The default behavior of showing suggestions is not ideal from a privacy standpoint when someone is around looking at whether one enters the proper information into the phone.

I use the latest Venmo app on Android 10 with Samsung Galaxy S9.


问:
Disable Google Assistant Gesture
Im using Miui 12.5 in my Redmi 9, and for navigation im using gestures(swipe up for menu, swipe from corners to center to go back, etc), but sometimes when swiping up, instead of going back to home screen it shows the google assistant(like in the image) and i could not find where to turn this off. How can i disable this behavior?

Title: Disable Google Assistant Gesture


问:
Is there an official source of Google Play Store/Service Framework/GMS? or trustable third-party sources?
I tried to install the three Google apps with the auto-installer I used for my non-rooted Huawei P40 on EMUI 11.0.0 (based on Android 10, I think). Though the installation was successful, there was no response when I click the sign-in button of the Google Play Store.

So I want to try with the latest stable official APKs, but I couldn't find any. Is there an official source of Google Play Store/Service Framework/GMS? or trustable third-party sources?


问:
What are the two linked contacts under "Myself"?
In my phone, there's a "Myself" contact that can't be deleted or renamed, which has two linked contacts inside it. Those can't be unlinked or deleted either. Both contacts are marked as "Phone contact".

Why are there two and why are they not unlinkable? Can I link another contact under "Myself"? I want to add my phone number there; which of the two should I add this to?

ContentLicense: CC BY-SA 3.0


问:
Autodeletion of bootup sound
a noob here

My stock rom doesn't have a default boot sound
But my old device has a boot sound(Which means I can change it)
Then my question is that how can I set boot up sound on my relatively newer device
My phone is not carrier locked in any way
My old device is Samsung tab4 10.1
My newer device is Samsung J7 max
 OS - 5.1.0 and 8.1.0 respectively
 My newer device automatically deletes PowerOn.ogg in my /system/media/audio/ui after a reboot
 I have theese many magisk modules

Is any of these modules interfering
 Any workaround is appreciated

Thanks in advance

Title: Autodeletion of bootup sound


问:
The phone is not running Samsung’s official software
Does anybody why my Samsung a40 phone briefly in red text say "The phone is not running Samsung’s official software." and then booting to Download mode. I got this error after trying to flash Twrp.</p>


问:
An unknown symbol looking like a red pin marker with "EMD" text shown on the screen
I have a Vivo Android phone. The screen is showing a red pin marker with "EMD" text in it.

(Click the image to see in full size)

What is this, and how to remove this?


问:
My massages are not delivered to a particular contact on Whatsapp
I have a friend. He lives in Finland and uses WhatsApp on his iOS Phone. I'm in Iran and use WhatsApp for Android on my Galaxy A8.
Over the past few months, our ability to communicate through this app has deteriorated. He says he doesn’t receive my messages, apparently he can’t see them. This is frustrating, to say the least, and puts a lot of unneeded stress on both of us.
He says that I'm the only one this happens to, and that communication with his Iranian contacts works just fine.
I'm really clueless. I've scoured the Internet for answers, but I can't seem to find any. I send messages, and in the time they delivered to my friend, after 2 or 3 days. I've uninstalled and reinstalled the app countless times, and my network connection at my house is perfect. But this seems to only be getting worse. I send him several messages a day, but I only get some of the messages about every other day--usually every two days.
I'm not a tech by any means, but it seems like there might be something wrong with the different versions of WhatsApp. Android communicating with the iOS Phone. So if this is the case, then my question here is unneeded. I've contacted WhatsApp Inc. with my concerns but not get any appropriate answer</p>


问:
Cannot move apps to SD card using App2SD
I have Samsung Galaxy Core Prime running Android 5 Lollipop. I try to move some apps in the SD card with App2SD, but the file manager does not work.

Can anyone here tell me more about my issue? Because my mobile version is updated.


问:
Can i install windowsphone 8.1 into samsung a10?
I have a samsung a10 device and in my high school years i had a lumia windows phone whose tiles interface seemed to look really cool unlike anything google have ever imagined for their android os, now how do i download a windowsphone 8.1 or windowsphone 10.1 operating system and install on this phone, i have the admin rights to the device after rooting it, thanks...
Is this even possible with this samsung phone?</p>


问:
How root android 8.1 gtaxlwifi?
i wanna root my tablet, Samsung Galaxy Tab A. I tried enable bootloader using Adb & fastboot and later twrp and magisk, but i couldnt use Fastboot Commands, even with drivers. So, are there way to unlock bootloader with/without pc?

Note:
I am using Ubuntu at pc

I will be thankfull if u say method :)

Title: How root android 8.1 gtaxlwifi?


问:
Prevent Google News from contacting the internet
I have gone to great lengths to get my phone and all applications on it to limit the amount they talk to the internet and otherwise access data on my phone, especially for services I do not care to use.

I have modified settings all over the place, trying to be more restrictive in general.  Things I have done include:

In Privacy -> Permission manager, limited access for each category to only apps that make sense.  Unfortunately, there is no option for internet (wifi and data), unlike a previous phone I had, thus the next item:

Turn off Wifi and Data permissions for individual apps within the NetGuard firewall.

Turn off all permissions within App Info -> {application name}

Disabled background applications

For Google News, I have done all this.  Yet now I am still getting notifications with more recent news events that happened since doing so.

Obviously I can turn off notifications for Google News within App Info -> Google News -> Notification.  However, I am more deeply troubled that the application is still running and getting information from the internet given the measures I have already taken, and may continue to do so even after disabling Notifications.

What have I missed?  Is there some other setting I need to adjust?  Is the firewall ineffective?  Is some other application getting the information on its behalf?  (And if so, is there some way to stop it from doing that for specific apps?)

Phone: Motorola Moto G Stylus
Android 11 with August updates


问:
How to add link2sd to cyanogenmod custom_backup_list.txt?
I'm using link2sd installed on /data

Every time I update the CyanogenMod rom I need to recreate the scripts and reboot to recover all the applications that are on the ext3 partition.

¿Can I edit the /etc/custom_backup_list.txt file to preserve the link2sd scripts?


问:
Chronic "ERR_NETWORK_CHANGE" on AT&T Motivate
My Android phone was recognized as a V-Smart Hobson when I activated it. My Google Account also said the same under "My Device". This error has become so chronic, it is part of every single connection now. This is an AT&T Motivate Android phone that I discovered is exclusive to AT&T (it has several odd design features already anyway). But when my 1st Google Account recognized this as a V-Smart Hobson rather than a Motivate, a quick search says a V-Smart Hobson is a hub for TIOT type devices.

My Google account was hacked on 2nd day. So I made a new account, now says this is an unrecognized V-Smart. These chronic errors then began. Also chronic CAPTCHAs. I've several sites denying me access, saying that "Bots not allowed". I found a site that helped me flush my DNS, but when I tried to change to a private DNS, it just goes back to automatic DNS.

IDK, but this is eating data like Pacman dots while I'm connecting and getting nowhere. I have $75 prepay & I'm out of data in 8 days for this 2nd month again.


问:
Installing Java and running JAR files on Android 4.4
I want to install and use Java 8 on Android 4.4. Using Termux is not an option because it requires a minimum of Android 5.0. I do have root access.

I tried to install the ARM version of Java using rpm, which worked but it is not usable. When I go to the /bin directory and run ./java -version, it gives me an error ./java: not executable : magic 7F45.

Is there a way to install and run Java on a rooted Android phone, without the use of Termux?


问:
Is it possible to buy a used Samsung phone with fake/hacked Android ROM that looks like the official one and may spy on you?
I have a used Samsung phone. I wonder if it is possible to have a malicious ROM uploaded that looks like the official one that may allow the hacker to spy on the user. Can I make sure that I have the official ROM? The system updates are downloaded and seems legit. Also I checked Settings -> Device Status that states "official". Is it enough or these information can be forged?


问:
SMS text messages on Huawei p smart 2017
How do I recover SMS that have been deleted from my phone? I have phone of brand Huawei p smart 2017.</p>


问:
How to fix corrupted IMEI number?
I have a Samsung Galaxy S GT-I9003 running GINGERBREAD.XXKPE. Right now when I type *#06# in the phone app, the popup shows:

(I recreated the image with my paint editor because I didn't want to use my camera. This is still an exact recreation of it.)

How would I put the IMEI back into memory? I have the IMEI from the back of the phone saying: *5**07/0*/9****7/*

I hid some numbers for obvious reasons. How would I put the IMEI back into the machine? Apparently, the IMEI is a 15 digit code but the IEMI on the rear of the phone is in this format: ABCDEF/GH/IJKLMN/O. Could you also rephrase this '15 digit code' to be 15 digits without slashes using letters A-O?

Title: How to fix corrupted IMEI number?


问:
Preventing auto expansion of Gmail in the notification?
If I remember it correctly, Gmail used to show only a digest (the title/sender/time) of new e-mails in the system notification, and I had to expand it manually.

I don't know since when it changed but now, but now it seems to be expanded by default. To me, this is very annoying because often I do not want to read the e-mails right away, and when I swipe down to open the system notification menu for other things like stopping music, the big new e-mail notification takes up the entire screen, making it difficult to swipe up to close the system notification menu.

Is there any way to prevent automatic expansion? That is, I want Gmail to show only the digest in the notification, and the full body only when I manually expand the notification.


问:
dm-verity corruption after slot switching Android 11
I tried to create a service for slot switching in Android 11. I have used the API from Bootctrl HAL to check the other slot availability and valid image in it. I have updated both the slots a and b with same image, then the service was successfully switched between different slots. With different images in slot a and slot b it is failing. After the slot switching, getting dm verity corruption and log is as below

```<code>[ 4.383505] device-mapper: verity: sha1 using implementation "sha1-ce"
[ 4.394599] device-mapper: verity-fec: 252:0: FEC: recursion too deep
[ 4.401091] device-mapper: verity: 252:0: metadata block 542471 is corrupted
[ 4.408301] kvm: exiting hardware virtualization
</code>```

Device is continuously rebooting after slot update. Could anyone please help me to resolve this?


问:
Cannot install/replace Android OS on Samsung S3
I have a corrupt version of Android on my S3 phone: WiFi signal is 100% but almost zero internet connection.
So I found a binary: S968CUDUAMH1_S968CTFNAMH1_S968CUDUAMH1_HOME.tar.md5 which is good(?) for my S3.

ODIN Report

I completely uninstalled everything relevant and reinstalled without errors or anomalies in Device Manager.

But am still in the same place. ADB sees phone connected but will not program so I'm missing something somewhere.

@alexcx suggested ODIN requires download mode. Please explain. I also looked at your XDA link but that seems to require Internet connection which I don't (nearly, see below) have.
Your link to lost internet on Android 4 or lower, I'm afraid, won't help since again I don't have internet access.
Your comment that you're pretty sure I have internet access may be [just] partially true.  Note my router connection is five bars but internet connection may be just one, hard to be sure, since I can intermittently connect to google but 99.9% of the connections time out.
So I'm assuming it's an OS issue so rooting and replacing OS just might resolve it.

Ah! @alexcs, your final comment led me to load ODIN and check the fist step when I should see (first) ID:COM with something like 0:[COM6] underneath but I don't.. see my pic.
Also no <ID:0/006> Added! in the Log.
So if ADB can see my phone why can't ODIN?  I have AFAIK have Samsung drivers loaded with no errors in DM.


问:
How do rndis0 and eth0 interfaces get set up?
In a normal installation, looking at ifconfig (or ip) in adb shell, there are no rndis0 or eth0 interfaces set up. Once USB tethering or ethernet tethering is enabled, they show up.

With my GNU/Linux hat on, I thought there is some module loading and udev happening in the background, but clearly, that's not the case.

Can anyone explain what is happening in the background and how can this be replicated via shell commands?


问:
Playing audio through phone call speaker
Is there a newer method of routing audio to the phone call speaker (the speaker that you put your ear to)? This suggests using Earpiece, but the app does not appear to work on Android 11 and up and hasn't been updated since 2015. Any suggestions?</p>


问:
How and where do I access my S Notes on Samsung Galaxy Note 8?
I have ~1400 S-Notes that use ~40 GB of internal memory on my Samsung Galaxy Note 8. Where are the S-Note files located? How do I access them directly? Is there a way the enable access to the S-Note files? Are there any tools that give access to all files on the phone?

SmartSwitch doesn't have enough room to back them up anymore (needs 23 GB of internal memory only apparently).

I've tried finding them using the Android Studio Device File Explorer on the Note 8, but can't find the files. On Samsung Galaxy Note 2, they were located at /storage/emulated/0/S Note. This directory on the Note 8 has only one small text file.

I've also made backups using ADB (adb backup -apk -obb -system -shared -all -f F:\samsung\note8\2021_09_06_backup.ab), but the backup does not seem to contain the S-Note files. It also does not backup everything maybe due to lack of space.

An ADB pull (adb pull /data/data/com.samsung.android.app.notes F:\samsung\note8\ and adb pull "/storage/emulated/0/S Note" F:\samsung\note8\) of that directory only returned the small text file.

With only 500 MB of free internal space left, I've resorted to having to delete old notes now! The S-Note trash holds onto the deleted files for 15 days before actually deleting them but gives the file space back somehow.

I don't understand why I have to work so hard to access my S-Notes files. It's hard to use the S Note files on my Windows computers now after an S-Note upgrade that changed the file format.


问:
How can I unlock/root the Vivo Z1?
I have enabled developer options, enabled USB debugging and unlocked bootloader (OEM unlocking).

```<code>fastboot flashing get_unlock_ability
(bootloader) get_unlock_ability: 1
OKAY [ 0.000s]
Finished. Total Time: 0.000s
</code>```

My phone is vivo Z1, its CPU is Snapdragon 660 AIE with Android 9 OS, security patch level 2021-02-01, it is system-as-root and has no ramdisk.

I am unable to unlock the bootloader:

```<code>PS C:\ProgramData\Android\SDK\platform-tools> .\fastboot oem unlock
FAILED (remote: 'unknown command')
fastboot: error: Command failed
PS C:\ProgramData\Android\SDK\platform-tools> .\fastboot flashing unlock
FAILED (remote: 'unknown command')
fastboot: error: Command failed
</code>```

I have installed vivofastboot and vivofastboot_v2, and updated the dlls source

vivofastboot

```<code>vivo_fastboot bbk unlock_vivo
...
FAILED (remote: unlock fail.)
finished. total time: 0.000s
</code>```

vivofastboot_v2

```<code>vivo_fastboot vivo_bsp unlock_vivo
...
FAILED (remote: check Signature Fail)
finished. total time: 0.000s
</code>```

How can I unlock/root the Vivo Z1?

Title: How can I unlock/root the Vivo Z1?


问:
Create and edit a bash script in an USB connected smartphone
The question explains it all. I am using Ubuntu 20.04 LTS. I have connected an android smartphone to pc using USB. Changed directory to internal storage using:

```<code>cd /run/user/*/gvfs/*/'Internal Shared Storage'
</code>```

And now I wanna create a bash script. Did this:

```<code>touch test.sh
</code>```

But it says:

```<code>touch: setting times of 'test.sh': Operation not supported
</code>```

But if I 'ls' again, I see 'test.sh' actually got created. So whatever, I do this to edit 'test.sh' using vim:

```<code>vim test.sh
</code>```

But got this:

```<code>cannot open path of the current working directory: Permission denied
</code>```

Doing sudo outputs the same error. Is it possible to do what I am trying to do?

Android version is 8.


问:
Go into main screen directly
Good day!

ColorOS version V6.1.2,
Android version 9

The problem I am facing is: when the screen on, it shows a cover page, I need to swipe up once, then it enters the main screen. (there's no password setup for the screen on.)

How can I make it goes into the main screen, once the power button is on (without any screen protector or cover etc)?

Thank you!

Title: Go into main screen directly


问:
google drive backup and restore restore one app
I have a OnePlus 6t and factory reset it a few days ago because it was really slow (btw the problem is still not solved, also my fingerprint sensor doesn't work anymore, may be linked). I did my backup locally (only sms and photos) and on the Google Drive service (everything saved there, always enabled and saves everything).

My problem is that I had more than 2000 solves of my time solving the cube, I always tracked my progress. I can't anymore because I lost the data as it was not saved locally. I don't want the data of the other apps, I would like to get only the data from this app, the name of the app is twisty timer.

I tried to use adb and bmgr, but I can't manage to make it work. I do not find the package name, it seems to be com.aricneto.twistytimer... And when I try to restore from the old save nothing works, and it says in logcat

PM agent has not metadata
And in the shell console, restoredFinished -1000. I don't know what to do and how to do. Can somebody help me ?

I tried to so the same with other apps, there are two backups (of the same phone), one before reset, one after. I manage to restore from the new backup files, but not from the old ones. I don't know if there is a much simpler solution. I can see the app exist in Google Drive in the app in the old backup, but I can't do anything with it.

Found this great resource on the famous internet

edit : Here are the screens of what I mean

A few tries with bmgr :

https://snipboard.io/nfiaMe.jpg

All the sets in bmgr (old and new saves)

https://snipboard.io/4qeJWD.jpg

The Google Drive app on my phone showing the app (twisty timer)

https://snipboard.io/5J1UcY.jpg

Thanks in advance


问:
Debug the full output of QR code reader?
In my Android device, I use app "A" to scan a static QR code and the app will show the result.

If I use a regular QR code reader app, the QR code will show as: "checkin:XXXstaticID"

Is it possible to know the full execution command of app "A", so I can just execute that command or open the URL without have to scan the QR code?

Thanks


问:
Android x86 isn't working in virtualbox
I have installed android x86 in virtualbox. But its not booting now.

After installation it pop up a message "Android x86 installed successfully". Then I power off the vm and remove the iso image from it and then power on. When booting the os it only shows this. (This display has been there for 1 hour.)

Title: Android x86 isn't working in virtualbox


问:
Mysterious grey rectangles on notification panel
Got a new Nokia 5.4 that has just recently been updated to Android 11 with no 3rd-party apps installed except Kaspersky. However, I've been noticing a rather strange behaviour where there seems to be an almost invisible app running in the background. Dragging down the notifications (one level down, not all the way) and there seems to be some sort of app/icon when I tap the area.

Attached are screenshots so it's clearer.

Run a virus scan but nothing shows up. Whatever it is, it seems to have been on the phone before unboxing and first boot.

To clarify, this behavior has been there even before I installed anything on the phone. Spoke to Nokia support and they said it's not something they're aware of and suggested I report it as a bug. I've asked this question in Nokia's community forum to see if it's something that's present on all Nokia 5.4 models.

Wanted to get more thoughts if this is some spyware on the phone, which I highly suspect it is, and how do I remove it.

Any idea what it is? Is this some embedded spyware?

OwnerDisplayName: Dot Lee


问:
Inspecting firmware integrity on Android
How do I inspect the integrity of the firmware on my Android device? For instance, if a Remote Access Trojan is present, what steps should I take to detect and remove them?</p>


问:
Can't see new options (like Spaces) on Twitter for Android
I have Xiaomi Redmi Note 10S, and MIUI 12.5.4 (Indonesian Rom). I installed the Twitter application, and for some reason, I can't see the new options screen:

Instead, I see the old tweet screen when I press the tweet button:

I already re-install it a couple of times, but no luck.

What is wrong?

OwnerDisplayName: Or Assayag


问:
How to install TWRP on to Huawei P9 Eva-l09
Hi does anyone have experience installing TWRP on a Huawei P9 Eva-l09, ive FRP locked my phone on factory reset and don't know the old account, i've unlocked the bootloader but when I run the command from the Fastboot to flash the Official Eva TWRP img I get an error

```<code>E:\Downloads\huawei>fastboot flash recovery twrp-3.1.1-1-eva.img
target reported max download size of 471859200 bytes
sending 'recovery' (25282 KB)...
OKAY [  0.552s]
writing 'recovery'...
FAILED (remote: image verification error)
finished. total time: 0.571s
</code>```

From research on other places I've found that it has something to do with how it writes to the partition as I've also tried

recovery_ramdisk

and had another error saying that the partition file size is wrong.

```<code>E:\Downloads\huawei>fastboot flash recovery_ramdisk twrp-3.1.1-1-eva.img
target reported max download size of 471859200 bytes
sending 'recovery_ramdisk' (25282 KB)...
OKAY [  0.552s]
writing 'recovery_ramdisk'...
FAILED (remote: partition length get error)
finished. total time: 0.564s
</code>```

If anyone could assist me in the install or show me a guide on how they did it I would appreciate it as I cant find the answer anywhere


问:
Installing Google Services and Google Play store on Huawei Y6P
I recently purchased a Huaway Y6P without realizing that it comes without Google apps. I am situated in Europe, not China, and I am used to using Google where I have all my data.

I have followed several guides online and all have failed. They all center around installing the Google Play Services apk and then the Google Play store apk, but they all point to different dodgy/old apk binaries.
This is what I have done:

I have enabled installing apps from untrusted sources.

I have installed Google Play Services 21.33.56 (the latest at this time) from apkmirror.com. I chose the version for Android 10, built for armeabi-v7a.

Once I install this, I get a new option under "Settings" -> "Accounts" for a "Google" account. Once I touch "Google", the activity seems to crash and return me back to the accounts menu.

I can install other google apps like play, chrome, maps, etc, but they all fail to load without error messages. I suspect this is because the Google Services app is not working and I have not been able to login to my account.

Can someone please shed some light on this? Am I installing a build for an incorrect architecture?

I'm beginning to regret buying a Huawei phone. I never would have guessed it's so hard to connect to my google calendar, keep, contacts, and other online data that I have on Google. Please help!


问:
Is there a way that I can "share" images by sending them to an HTTP endpoint?
I want to make some hacky prototypes where I use my phone to collect data and then process it with a regular program. For this I want to share images with an HTTP endpoint written by me to execute arbitrary code.

Is there an application that supports a "share to HTTP endpoint" feature?

Research

This thread talks about Tasker, https://groups.google.com/g/tasker/c/lI82IrDMq9k?pli=1, but it also talks about custom app manifests, which make me think this might be quite a lot of work.


问:
Google Assistant comes up blank. How do I fix it?
I have Galaxy A32 5G and the Android version is 11. When I ask Google something, it comes up blank and says "here are some details."

How do I fix it?


问:
How to show a visual indicator when mute all sounds is enabled
On the Galaxy S9 (and I presume later versions, though I don't know for sure) there is a "mute all sounds" setting that can be toggled by pressing the power and volume up buttons simultaneously. While this can be quite convenient, it's also very easy to either forget to disable it, or to enable it accidentally in the first place, and then you miss important alarms and notifications until you notice.

Is there any way to get a visual indication when mute all sounds is enabled, such as a status bar icon or making the perimeter glow a certain color?

Yes, I know that you can check whether mute all sounds is enabled by pressing either volume up or volume down, which will show a greyed out volume bar with a caption that says "Mute all sounds is turned on" if it's enabled, but I'm looking for some kind of visual indication that alerts you that it's enabled when you're not actively thinking to check.


问:
Android app installed (with wrong package name) as system app but not visible in system partition
System app Google Calculator update fails, but that's not the funny thing.

History

I was on crDroid 7.8 (Android 11) with Google Calculator app installed in system through FlameGApps.

Then I got the crDroid 7.10 update which switched FlameGApps with its own built-in GApps. So I re-flashed FlameGApps.

The Funny Thing

The now installed Google Calculator (whose actual package name is com.google.android.calculator) on my app drawer has package name com.android.calculator2 (which is the package name for the AOSP calculator app).

EDIT: When I try installing com.google.android.calculator, it says App already installed and update succeeds.

EDIT: But, Play Store shows app isn't installed, and the installation fails only through Play Store.

What I tried

I've used a combination of find and grep on the Android terminal (with root) to hunt down all files having the name calculator. there exists no such file (or directory), yet the app (with the wrong package name) is installed.

The apps directory should be located in the /system partition.

I'm sure /system was mounted (read-only but mounted).

I've used SD Maid to hunt down app corpses. Again, there were no corpses of the calculator app.

I do not understand what's going on.

OwnerDisplayName: Oogle Glu


问:
Contacts on android - what changed from release 5 to release 9 / 11? Installed apps do not see contacts visible to pre-installed apps
I could not find info via web search on what has changed with contacts from release 5 to release 9 / 11.

I installed WhatsApp on a new Android 11 phone (during switching from Android 5, contacts were copied via Mi Mover app and were seen via preinstalled calling/contacts app) and WhatsApp app could not find any contact using WhatsApp whereas I know some of contacts seen via preinstalled calling/contacts app is using WhatsApp. Investigating that issue I installed 3rd party app (https://f-droid.org/en/packages/com.simplemobiletools.contacts.pro/) to my release 9 other phone. The app did not show contact(s) visible to preinstalled calling/contacts app. I've read history of Android releases and do not recall anything about contacts that result in such behavior. Do newer (than release 5) phones organize contacts differently?

ADDED after comments:

Installed apps were given contacts permissions when asked for it. On 9 Pie phone when installed app added a contact pre-installed one showed it. When I started to add another contact via pre-installed one I was given a choice of com.google.android.contacts and com.simplemobiletools.contacts.pro, I selected com.google.android.contacts, added a contact and again installed com.simplemobiletools.contacts.pro did not show that new contact.

P.S. I recall how nice com.google.android.contacts contacts app was on Android 4, it could show internal and each google account contacts and sync them separately each against each set.

ADDED 2:

Looks like WhatsApp took A LONG (IMHO) time to "replicate" (and does not warn about it!), next day (today) WhatsApp "sees" contacts (I only tried to send messages for a few minutes after install). The question about behavior of other apps mentioned remains. Also on new phone I edited a contact - fine, then on editing some contact pre-installed app asked which account to edit: internal with bluish icon or internal with greenish button (???), I chose bluish cause on opening other one bluish icon was displayed, edited number; upon return to contact it now has both old and new phone numbers and I do not see a way to delete old one...But that IMO could be Xiaomi specifics.

How can I check what app is actually pre-installed for contacts, is it com.google.android.contacts or not?


问:
Chrome, YouTube, Whatsapp keeps crashing
My phone is 5 years old, Moto G4 play. Updated to Android 7.

Not many apps, still app keeps crashing and I have no idea how to solve, also memory usage of each app is bloated. In app settings page I see Carrier Service is reported as 500MB then I go to Carrier Service settings page, it is recalibrated to 30MB. Then Google authenticator - MFA app shows 250 MB, again I open its settings, gets recalibrated to 16MB. Finally I restarted the phone, now this is stable, but I'm too scared to open many apps simultaneously

Am I seeing hardware failure or Virus. I just installed AVG free version and scanned, it says nothing suspicious is found. I'm worried about both, at least if it is only hardware failure I can start doing routine back-ups


问:
How to install standard european stock firmware on Motorola G 5G XT2113-3?
I own a Motorola G 5G XT2113-3 that is on the "timit" software channel (TIM Italy retailer). In the recovery functionality of the LMSA tool, I noticed that by default it downloads the software / firmware in the European retail version (reteu software channel). It's correct? If I proceed, do I run any risks? Do you know the difference between this two channels? And what is the best way to install the standard european stock firmware? (LMSA, RSD or other tools).

Because I would prefer to have a phone with regular updates and with the software indipendent from the brand.


问:
Could I use a Bluetooth keychain (tracker) to track how many times a day an animal comes to eat on its food bowl (where I put a cellphone)?
I am researching wildlife rehabilitation and I would like to count how many times a day a released animal comes to eat on a food bowl left in the woods.

To do this, I am wondering if I could mark the animal with a Bluetooth keychain (tracker) on the animal's collar and then put a cellphone (the Bluetooth receiver) on a food bowl left in the woods, to register how many times a day (and what hour) the animal comes to feed after being released.

To do this, I think the Bluetooth reader app on the cellphone would need to operate in some kind of “always scanning mode”, in order to

catch the Bluetooth signal,

register the date and hour,

and then restart to scan for another signal without any human interference.

All day long until the phone (with a power bank) battery ends

Questions:

Could I use a Bluetooth keychain (tracker) to track how many times a day an animal comes to eat on its food bowl (where I put a cellphone)?

What Android app could do this job and generate such kind of report?


问:
Disable automatic screen turn-off even if I am not near the phone during call
I have a non-rooted Samsung Galaxy S9 running on Android 10. If I am placing my phone on a table during a call (using an external headset), it will turn off the screen after a couple of seconds.

How do I disable that?

I prefer not to install new apps nor rooting the phone.


问:
What kind of smartphone should I be buying if my one and only use is going to be "BankID"?
In Sweden, there's a bunch of very confusing "e-id" things, but it basically boils down to this: you need something called "Mobile BankID".

In theory, there are other solutions, and even "BankID on file", which I currently use. That means you install their cancerware on Windows and don't need any hardware/cards. Sadly, they have no requirement for companies to support this method, so in practice, 99% of all websites that "support" BankID actually only support "Mobile BankID".

"Mobile BankID", as you probably have already guessed, requires a "smartphone" and is an "app" (Android/iOS). I don't have one of those, for multiple reasons. (Privacy, a deep-rooted hate toward them and what they represent, the lack of money to waste on stuff I don't want anything to do with, etc.)

When asking them about this, they basically just respond: "most people use Mobile BankID, so the other ways are being phased out and we cannot force companies or other authorities to support the non-smartphone ones".

So I'm essentially being forced to buy a "smartphone". Which doesn't sound too bad as long as I can remove the battery and SIM card and only mount and start it when I need to "e-sign" something... except there are some serious problems with that:

It seems like these things (whether Android or iOS based) are not supported for a long time, and then they force you to buy new hardware?

It seems like these so-called "smartphones" are trending toward not having a removable battery, and soon there may not be any left that let me remove it.

Same thing with the SIM card which is apparently no longer even an actual card, but just some kind of re-programmable memory.

I have heard that there are soundproof boxes which also block all signals, which would solve the privacy/security issue with the battery/SIM card not being detachable, but I have looked for such a thing for a long time and just can't find anything. And note that I mean in Sweden. I'm sure you can find something on Amazon or something, but they rarely allow shipping to Sweden, or start harassing me whenever I actually try to buy from the USA.

The biggest problem is perhaps the fact that these things "expire" almost like milk. What kind of "smartphone" should I buy if I want like 10+ of OS/software updates for this dedicated "BankID device"? In fact, I wish to never have to upgrade the hardware, if at all possible.

PS: Their third option for BankID, with a hardware non-smartphone device and card, still requires you to run the program on the computer and connect a hardware dongle with USB, so please don't suggest that. And after reading more about it, it's even worse than "Mobile BankID" IMO. Plus the same problem applies there with the lack of support for anything but "Mobile BankID" specifically.


问:
Stop expansion of player (e.g. spotify, website, etc)
We all know that google has no idea about ux or ui, but I am hoping someone on their end is smart enough to give us an option, that I am just incapable of finding in their settings mess.

android 11, oxygen os 11.0.3.1.hd65aa

Here's the quick low down. In the notification bar, spotify sits above notifications, where the quick actions are. I'm ok with this, even though the player is imo larger than it needs to be. The real issue is when I expand my quick actions. Now spotify becomes fucking huge. There's no need for this to happen. I would like to keep it small. I am talking specifically about this:

It leaves very little room for notifications, and collapsing it all again is a nuisance too.


问:
Cannot choose different cellular network while on roaming
I am an EU citizen visiting a different country now (but still in EU), in the country's capital. For my travels I have bought a data pack from my provider (I don't have/use data otherwise). Now whenever I turn mobile data on, I only get EDGE connection. My provider's helpline assured me that the data pack I bought is supposed to be 4G. It is a major provider in my country and on the helpline they claimed that 4G should be available in the area I am visiting right now. They have advised me to manually select a different local cellular network.

I tried to go to the Settings, Mobile Network and choose the network manually -- I saw that there were several 3G and 4G networks from various local providers around me with a good signal strength. However, whenever I choose a network to connect to, the connection fails (it says Unable to connect under the network name) and I get a system notification from Phone Services (or is it Cellular Services? Sorry, my phone is not in English) which claims: No signal. The chosen network ( (xxxxx)) is not available (where the x's are always a different number, depending on the chosen network).

The only way I can connect to a cellular network is to choose an automatic connection in the Settings but it always connects me to EDGE. I have also verified that my preferred type of cellular network is set to 4G/3G/2G.

My phone: Xiaomi Mi A3, Android 11 (Android One). The SIM supports LTE.

Do you know what could be the problem and how to solve it?


问:
Whatsapp Last Seen/Online Info No longer available under Contact Info
It has been a few days I noticed that I can't see whatsapp Online/Last Seen on User's Profile page.
Old Image:

But there's Nothing like this in Current Version of Whatsapp... Anyone knows any reason for this Change/Update? Or it is happening to me only (Coz I didn't find any post about this Change anywhere on Internet)?


问:
Call declined on Android 11
I got a very strange situation when on Android 11 I got call declined. The caller is in favorites, did not set any filtering. This happen after 23:30h (11:30 PM). The problem is not in lost of mobile coverage because I see in the calls log record for this declined call.

The phone is OnePlus 8T, I do not subscribe for beta of Carrier Services app (it's stock app as provided by manufacturer). I have no firewall (for calls) installed or any app which can be related to this issue.

Sleeping is not activated. People - Calls is set to Starred contacts and this contact (with declined call) is starred.

My humble suspicion is some power management (during call-in the consumption of phones is quite high) settings need to be configured to avoid this to happen again.

Title: Call declined on Android 11


问:
How do smartphones decide whether a phone call is spam or not?
Like everyone else, I'm receiving spam calls. With my current job, most communication goes over the Internet (online meetings, chats, etc.) so in my case, it's nearly only spam.

What I'm wondering is how can the phone decide whether a call is a spam call? It can't be based on the phone number since 99% of the time (it seems) those are spoofed. Once in a while, I get calls from people who received a spam call with my phone number spoofed.

I've heard a year or so ago that the TELCO were going to implement a system to help verify phone numbers, but I've not seen anything more than that.


问:
Game screen turns black
I have downloaded Dragon Quest 5 on my LG V60 UW.  During the game there are transitions between a world/town/dungeon map and random combat encounters.  Sometimes the combat encounters are a black screen where I can touch the buttons if I remember where they are and sort of ham-fist my way through it and the map area reappears after the combat is over.  Other times the buttons don't work or ones I'm not used to pop up and I just have to kill the app and try again, losing some progress.

Usually killing the app and starting over again restores the normal functionality.

I have contacted Square-Enix support about the issue and their suggestion to me includes wiping out all my data and cache for my web browser as well as the google play store.

Does this step make sense to anyone?  Has this worked to fix issues with other apps before?  To the best of my knowledge this game does not interact with the web browser in any way.  Likewise the app store is a separate app, and I would not imagine that the game shares data with it.

Title: Game screen turns black


问:
"Phone calls", "Media audio", "Contact sharing" option missing in Bluetooth settings
I have a Samsung phone. "Phone calls", "Media audio", "Contact sharing" options are missing in Bluetooth settings. There's only a toggle for "Audio".

Any idea why "use for" option is missing?


问:
Mapping bluetooth mouse buttons
I have a bluetooth keyboard and mouse I use with my HTC EVO 4G, and I have tweaked my keyboard using the methods in the answers to questions like this and this.

I would like to know if there is a way to do a similar thing with the buttons on my bluetooth mouse.

i.e. I would like to map the wheel click to turn off the screen, or make the right click emulate a long click rather than go back a view.

I am running Cyanogenmod 7.1 (stable) currently.

Title: Mapping bluetooth mouse buttons


问:
Create WiFi AP in Termux with root access
For some purpose, I want to create a WiFi access point on my Android because I cannot turn on the hotspot when WiFi is enabled. And also I tried to use NetShare, but it cannot be enabled on boot.

I have hostapd binary in my Android in /vendor/bin/hw/hostapd and I tried it, but it doesn't turn on when WiFi is enabled.

How to create WiFi AP programmatically without NetShare (app).


问:
Disable “swipe up to unlock” antifeature
Samsung Galaxy XCover 4s, stock ROM (work device), Android 11

To unlock the device, I first have to swipe up before I can enter the PIN. This is not so on my HTC Desire running LiquidSmooth 3.2 (kitkat) which directly displays the PIN screen.

Swiping up is a problematic gesture for me, especially on this huge device. How can I disable it so pressing the power button directly shows the PIN screen?


问:
Is there a way to prevent Android from switching back to mobile data once it found and then lost WiFi connection on unrooted phones?
I use mobile data a few days per month. I'm charged 1$ whenever I enable the mobile internet (with WiFi not present) and then I can use it until the next day. If I don't disable it before midnight, I get charged 1$ again. This is cheaper for me than paying every month for a certain amount of gigabytes.

The problem is: sometimes I forget to disable it, and get charged when I don't use the mobile internet. Sometimes this even happens when the phone is connected to WiFi.

I saw this post, which says apps can no longer enable / disable mobile data programmatically: https://stackoverflow.com/questions/31120082/latest-update-on-enabling-and-disabling-mobile-data-programmatically

Also there is this app: https://play.google.com/store/apps/details?id=com.gyagapen.cleverconnectivity
But it only works on rooted phones.

I've also seen other posts that say that it's only possible to disable the mobile data on rooted phones.

Is there any way to solve my problem on an unrooted phone?

If that's impossible, is there any app that could detect that mobile data is enabled and remind me to disable it before midnight?

Or is there anything else that can help in this situation?

I have Xiaomi Redmi Note 8 pro. With MIUI 12.5 and Android 11.


问:
Android ID associated with familiar devices
I have a rooted Moto e6 that I'm trying to change the Android ID on to one from a previous phone that is no longer serviceable. This is not about app ID's, which have already been answered. I'm attempting to recover a couple accounts and do not have the phone number I used when I set them up. Just being on a familiar network and knowing the previous passwords isn't enough any more, and since they shut down the "can you provide us with more information," I'm stuck trying to make a familiar device from scratch.

I downloaded my data from the one account I still own that was on that phone. This includes the 19-digit Android ID associated with the original device, as well as other device info such as the serial number, IMEI, etc.

I'm under the impression that's the Android ID Google uses to identify "familiar devices." I've looked and verified it's the same across different accounts on the same phone under the same user.

Going from another answer in here, I pulled up /data/system/users/0/settings_ssaid.xml on my Moto e6 and
the android_id shows up as a 64 bit hex string. I tried searching for the 19 digit number on the phone with Total Commander, but came up with nothing.

Yesterday I decided to try and swap out the 64 bit hex string with the 19 digit Android ID from the old phone, rebooted, pulled the device configuration data, and nothing changed. Still showing the same ID. I pulled it again this morning and, again, same.

My question is: Where is this number located? Am I looking in the wrong place?

Thanks in advance.


问:
Redmi note 8 is on recovery mode. Booting constantly but not booting to system
I changed the dpi from 392 to 1000 in my Rei note 8 in developer option. After that it constantly is on booting Loop to recovery mode. And I can not wipe my data cause it is only there . (Local drive). So I can't afford to loose data because some of my important information and sodt copies of certificates and other identification proof are there.  How can I get them back cause only option there is to wipe data because mi assistant is useless here.(no function).
So please kindly do take some time to help me if you can. I am eagerly waiting for the solution.  Thanks in advance for the answer.</p>


问:
How to setup my Android wifi config for vpn sharing using astrill?
https://wiki.astrill.com/Astrill_Setup_Manual:Enable_VPN_Sharing

I am trying to enable VPN sharing from my computer to my Android device. I got to the step where I change the IP Settings from DHCP to Static. I entered the IP address in Gateway, DNS1 and DNS2 as instructed.

However, I am unable to save because the IP address field is missing. Does anyone know what to enter and where to find it?

OwnerDisplayName: Xi Wei


问:
"Play Movies is not yet available in your country."even though Play Movies is actually available in their region
Google Play Movies is available and works on other devices in my region (UAE) except mine. The app itself gets constantly disabled automatically on its own and does so no matter how many times I re-enable it, without displaying anything else other than that annoying error.

I have tried reinstalling and clearing the cache and data of the app, I also tried VPNs and none of it has solved the issue.

Is there any solution for this?