问:
How to activate internal mic during phone calls when using headphones with a USB-C to audio dongle?
I would like to use my Samsung Galaxy S20 phone with my quality studio headphones for phone calls. Since the device does not have a 3.5 mm audio socket, I am using a USB-C to 3.5 mm dongle. The problem is that when the dongle is plugged in, the phone expects the audio recording to come from the headset's inline microphone, while disabling the built-in microphone.

Is there a way to set the phone to use the internal mic while using external headphones through the dongle?

I tried a couple of dongles and all have the same issue.

Update: Phone is Samsung Galaxy S20, Android version 11, not rooted.


问:
WhatsApp icon randomly changes its association and starts the camera
The phone is Google Pixel 4a. I created the shortcut for WhatsApp by dragging the application icon to the home screen in the normal way, but the icon randomly changes its association and it starts the camera instead.

The correct association is restored by shutting down the phone and rebooting. But this has happened 3 times in as many days. Never did it until this last week. No new apps installed or setting changed.

Why and how to prevent this from happening again?

ContentLicense: CC BY-SA 4.0


问:
How to update Android on Samsung Tab 8.9 - GT-P7300
I have a tablet Samsung Tab 8.9
Model number: GT-P7300
It has Android 3.2 and it should be upgradable to Android 4.0.4

I downloaded a big zip file named "XSG-P7300JPLP7-20121217--www.SamSony.net--.zip" - 419 MB
It contains various .md5 files and a file named
"P7300JPLP7_P7300OJPLP4_P7300XXLQ6_HOME.tar"

I also downloaded latest Odin - v3.14

But I have no idea how to tell Odin to make use of those files.


问:
Is there a way to make a folder you CAN'T share images from?
I'm constantly scared I might accidentally "butt-dial" share my girlfriend's sensitive images, is there any way to make a folder for images that won't include a share function?</p>


问:
can't enter recovery mode after flashing resurrection remix v5.8.5 android 7.1 in Lenovo vibe k4 note
recently I have been trying out new roms. When I flashed resurrection remix v5.8.5 on my device (Lenovo vibe k4 note) via TWRP recovery, after that the room was working fine, but magisk came pre-installed, which, when I open, gives an error: "magisk manager has stopped working". So I decided to change to another rom. but I can't boot into recovery menu after flashing resurrection remix os. when I try to boot into recovery, it directly boots the system. And when I power it off, after an hour or two, it automatically powers on and boots the system. I would be grateful if someone helps me. Thank you</p>


问:
Is it possible to get assistant voice on Android Auto sounding good without data?
I don't use data to use AA (I have offline Spotify and offline Maps) for the most part.

As a result the assistant voice sounds like a robot from the 1970s.

Anyway to "download" the good assistant voices or force Android Auto to sound good?

I have tried to set the voice sampling in Android Auto up to 48kHz.


问:
My notification panel and home button not working. It's saying developer options not available for this use when i checked the developer options
My android device(Asus max pro m2) is running on havoc(3.2) suddenly rebooted and I cannot use my notification panel, home button, or literally anything else. This issue will be solved if I delete the data partition using TWRP but. I have to literally install every application again and again. Nova launcher method not working for me. I tried everything regarding that nova launcher thing but no use. if I check the developer options it says developer options not available for this user. This isn't the first time this issue happened. but earlier I had to reset the things. but now I would like to know if there is any other solution to this. Anyone, please respond asap. cause I couldn't use my phone if I cant get a solution.
Thank you in advance</p>


问:
Find what's crashing my phone
I have a Galaxy M51. At times, when I wake up in the morning, the phone is dead - No response to any of the buttons, when I call it from another phone, it says "the number is switched off", no response on connecting charger. Only when I press power button and vol. down together (hard restart), does the phone turn on and then starts working perfectly normal, only to show a similar behaviour in a few days</p>

Title: Find what's crashing my phone


问:
Instagram stories and local videos play in slow motion but sound is fine
A friend of mine started facing this problem yesterday night: when she browses through her Instagram stories, the video plays at a slower rate than normal, however the sound is totally fine. She went ahead and checked the gallery as well - same problem there. In TikTok though, there are no issues at all.

As she did not provide any more information (she is not tech savvy at all) here is the info that I know about her phone: it's a Huawei Y5 2018, with Android 8.

I searched online about this, but I didn't come up with anything related to Android. Any help is appreciated.


问:
App not being loaded in the emulator
I am trying to run this project in the emulator through Android Studio (4.1.1) on Ubuntu 18.04. Everything seems to be set up properly in Android Studio, I have a device called Pixel XL API 29 and the emulator starts up but it doesn't open the app and I can't find the app in all apps.

At first, I had a couple of issues with the emulator not starting up at all but I managed to fix those - something to do with kvm - had to change some user settings and then restart my laptop.

I've tried googling but no solution yet, mostly I find issues with installing apps from the Google Play Store.

Any ideas appreciated!

Title: App not being loaded in the emulator


问:
Default applications budget phone?
Is there a reason budget phones for android contain so many default applications?  Maybe this is required by Google?

I find YouTube, play books,play games, etc. to not be needed and redundant when you have a web browser especially on 16 gb phones.

Title: Default applications budget phone?


问:
Restricted profile can't unlock tablet in android 10
On a Samsung SM-T290 (Galaxy Tab A 8.0") with Android 10, there is regular user account and also a restricted profile for users to use in order to restrict what apps can be used.

In previous versions of android, the restricted profile could unlock the tablet. However, in android 10, I can't seem to switch to the restricted profile user on the lock screen, unless the regular user account unlocks it first.

Is there a way to allow the restricted user account to unlock the tablet, so the main user doesn't have to login/unlock it first?


问:
/bin/sh: dumpsys: not found
I am working on an 845 uSOM (Linux sda845 4.9.103) and want to modify USB charging/battery behavior. I'm not the most knowledgeable when it comes to working with adb, and I am not sure how to move forward. It seems that I can neither use 'dumpsys' or 'service call'. My ultimate goal is for things like:

```<code>adb shell dumpsys battery unplug
adb shell dumpsys battery set
</code>```

I am told online that in order to find the name of the service I need in place of 'battery' I need to use:

```<code>adb shell service list
</code>```

However, this isn't found either. Am I supposed to use systemctl at this point?

```<code>systemctl list-unit-files
</code>```

yields a service called 'charger_monitor.service' but at this point I don't know if I've found something useful or I am completely off the scent. Do I need to get dumpsys on this system? I thought that if I could use adb on a device then dumpsys came along with it but maybe it is not applicable on this uSOM?

Title: /bin/sh: dumpsys: not found


问:
MT8163 MediaTek chip with SPFT gives this error no matter what I try - BROM ERROR: S_DL_GET_DRAM_SETTING_FAIL
I have a non-brand tablet built with locked bootloader, and I'm trying to flash it with spflashtool. Since it is a proprietary tablet built to be secure, there is no firmware available publicly. I'm trying to do a read back first in order to generate a scatter file by following the tutorial here at hovatek.

Chip type is MT8163v

When I try to do the readback, or anything else for that matter, I always get this error:

```<code>BROM ERROR: S_DL_GET_DRAM_SETTING_FAIL
</code>```

This error typically occurs when trying to flash incorrect firmware. However, I'm not trying to flash yet. I'm just trying to accomplish a read back, in order to flash later with correct firmware.

According to hovatek, I should just be able to use the generic scatter file that they offer on their site., or create a generic scatter file using WWR MTK. However, I tried the scatter file using both methods and I still get the same error.

Is there any other reason I may be getting this error? Could different versions of spflashtool possibly work?

Any ideas greatly appreciated... I'm really at a loss here.


问:
Can't access phone as forgotten work profile password
A while back I set a password for my work profile. For the life of me I cannot remember it (tried so many different combos).

I want to access my phone but it's asking for the password, which I don't know. I tried quite a few times and it eventually said if I input the wrong password again my work profile would be deleted. This would be fine as I could gain access to my personal account and set up my work profile again.... but no, after inputting another incorrect password, it just says try again in 30 seconds.

I can't even access my personal account as it's just asking for the password.

I don't want to go "nuclear" option to factory reset my phone as not all my data is backed up.

Is there anything else I can do to gain access to my phone?


问:
Samsung s7 is on dead mode, buttons are also not working, usb debugging is also off.. Please help me to recover my phone
my phone is Samsung Galaxy S7. Suddenly while using the phone, it stuck on black screen with lights on both navigation n back button.  Then after 1-2 minutes,  it stuck on restart on loop mode. After few minutes the screen again got black with blue led notification light on & no button was working till whole night it was like this. Then in morning, the led light turned off automatically but the phone condition was same, black screen with no button working. Even when i connected charger then also charging red light was not on. It wasn't charging at all.

USB debugging is also off on my phone so couldn't connect it to the computer to fix it.

Please help me to recover my phone or to let me know how tk turn on debugging when phone & buttons are not working.


问:
Why I'm unable to set a WIFI static IP address?
On my Android mobile phone (a recent Huawey MAR-LX1B), I would like to permanently set a static IP address on a specific WIFI LAN router connection.

The reason is that, on an application backend server, I want to "identify" connecting devices (specific
unique mobile devices). A simple way to identify clients, on the web application, is to use caller IP addresses (debatable, I admit).

On Android (version 10) I would be able to change the local IP address to static, setting an IP of my choice, but on my phone, when I fulfill configuration data in the WIFI advanced section, the save button is disabled.

Any idea?

BTW, do you think maybe ste MAC address - IP address setting on the DHCP server, here suggested: https://android.stackexchange.com/a/15827/338630 could be a better
approach (to identify clients assigning them static IP addresses)?


问:
Accessing the antenna of an Android system
I am asking a similar question to this
Tap off raw RF data from antenna
but would like further explanation.

First off, I'm an electrical engineer, so I have no experience with android systems besides the average phone user experience.

What I am trying to do is use a mobile device that can read RFID data at 2.4 GHz. This is as low-level as you can get, but I know we don't have access to raw RF data. Is there a way I can collect the RFID data without needing any external peripherals?


问:
Androd device performance degradation with age
How does the performance of an android device degrade ?

Does not exiting the app age the device? Like not closing a browser tab but exiting internet app by swiping the app window from the one of the navigation Butt it because it is using ram?

If too many apps start when powering on  bad for phone,does it cause it to slow time overtime or only the part when you power on.

Over a time how does a device performance slow down,is it old hardware?


问:
whatsapp not connecting to network until opened
The problem is only with whatsapp app, only in my android device and only when connected to my WiFi.
Background data is turned on.
Battery optimization is off.
Account sync is enabled.
Proxy is none.
DNS is 8.8.8.8 or 8.8.4.4.
Could anyone please help. Thankyou</p>


问:
Locking bootloader after vendor build change
So, I have a Mi 10 Lite with the MIUI 12 EEA, and it's not the stock ROM but the Vodafone build (QJIEUVF).

As there's the new Android 11 update coming, I'd like to have that and not wait for Vodafone to release its build, as that's notoriously slow.
I tried the official Updater app, to install the XM (non branded) build, but it says the network carrier is different. Seems like the only way is to unlock the bootloader. However, I read that means losing Netflix and Google Pay support?

Now, can I unlock the bootloader, flash the QJIEUXM with XiaoMiToolV2, and then relock the bootloader with Clean and Lock? Would that lead to a softbrick? Any other downside to doing that, such as losing OTA updates?

I tried to find info, but it's really hard to find any reliable information anywhere


问:
FBE encryption bootloader state in keys
I want to unlock bootloader on Android 8.0 FBE encrypted with PIN

I don't wanna lose my data, therefore i made backup of userdata partition before

According to CCC the bootloader state is part of encryption. The video neither explain how bootloader state is involved in KDF KEK DEK chain nor this concerns FBE

After unlocking bootloader + factory reset + restoring userdata partition,

encryption probably won't work. does this concern twrp too, is there any method to overcome this?

I cannot test that as i don't want to unlock bootloader without backup at moment

Title: FBE encryption bootloader state in keys


问:
Is it possible to boot from the SD card on the HDK8150 board?
I recently acquired the HDK8150 board. I am pretty interested in running a non-Android Linux OS there. After some hours of going through I found some interesting stuff:

I found that from Linux kernel 5.4, is supporting Snapdragon 855, so far so good!

There is one Ubuntu distribution named Ubuntu Core. It seems it fully supports Snapdragon, but it is pretty bound to the DragonBoard-410C.

I found that there is an Ubuntu's parallel project named Linaro  that looks pretty nice.

My point is that I would like to check out any of them, but I prefer not to flash the eMMC memory, but run the system from the SD card. I found it better, since I am pretty sure I am gonna mess up with something, and I am just starting with this. Is there anybody that has experience on this topic with this specific board? Is there any way to boot from the SD card? (It can be seen on the back that there are 8-switches labeled as "boot". There is no much documentation out there apart from the Quickstart guide.)

Any suggestions on which OS to use?


问:
GTalk sound notification doesn't always work
I have a Sony-Ericsson Xperia Mini Pro SK17i with Android 2.3.4 and I tend to use the GTalk app quite a lot. I also use Gmail chat whenever I'm in front of a computer.

Most of the time when I receive a new chat message, it appears both in my phone (triggering a sound notification and a status bar notification, like I've set it to do) and in Gmail (given that I'm on a computer with Gmail open). In these cases I read and answer these messages using Gmail and if I keep chatting in Gmail, my phone remains silent. If there's a break of some ten or fifteen minutes in the conversation, my phone beeps again when my buddy says something.

However, occasionally I just don't get notified of new chats. In these cases neither does my phone beep nor does my browser tab with Gmail show that "Buddy says..." message it normally does. Why is this? I think this happens with new chats only, not after a break in a recent conversation. Is it just a bug I have to live with, or something about which something can be done? Thanks in advance.

ContentLicense: CC BY-SA 3.0


问:
How to automatically force stop a user-specified application after every reboot
One of my phones is a Samsung Galaxy Edge S7. One of the apps, Samsung Pay, is uninstallable bloatware. The problem is that when Samsung Pay is running it takes up the bottom edge of the home screen such that it interferes with the upward swipe operation when opening the home screen after the screen is locked. I discovered that I can get rid of that problem temporarily by force stopping Samsung Pay. However, at some point in time either via a reboot or a system update or something else, the Samsung Pay app gets restarted. Then, I have to hunt through the menus every time and force stop Samsung Pay again, manually, which is a hassle.

So, how do I arrange it so that Samsung Pay is forced stopped at some point after each reboot, or better yet, every time that Samsung Pay is running? I searched the Google Play Store for app killers, and none of the ones I examined explicitly state that they provide a way to kill a user-specified application after each reboot. Or, if there is such an app, it would force me to try hundreds of ad-infested apps before I found the right one, which is also a even more annoying hassle.

I would be happy if I could install an app on the home screen that, when clicked upon, would force-stop only the Samsung Pay app. That would not be fully automatic, but it would suffice.

Buying a new phone is not an option.

Rooting the phone is not an option.

Any method that requires signing into Samsung Pay which requires creating an account which is tied to the phone is not an option. For example: https://www.androidcentral.com/how-disable-samsung-pay probably would disable it, but my experimentation shows that it is requiring an account just to get to the screen that allows you to disable it:
thus is a email harvesting scam.


问:
How can I remove from “previously installed apps” list in the PlayStore the applications that are already installed on my phone?
How can I remove from "previously installed apps" list in the PlayStore the applications that are already installed on my phone?

For example, the application anyconnect shows up in the "previously installed apps" list:

Even though it is already installed on my phone:

I use Android 9  on Samsung Galaxy S9 with PlayStore 17.8.14.


问:
How to increase the size of the system partition?
I have an old Google pixel 1 and I was trying to install a GSI but I get this a message on TWRP saying Size of image is larger than target device, so I went to wipe > advanced wipe > selected the system partition > and clicked repair partition and it said that it only has 1.3 GB of space, and the GSI file is 2.3.. Is there a way to increase this partition size ? thanks.</p>


问:
ODIN - Error <ID:0/004> Complete(Write) operation failed
I am currently trying to root an android 10 device (a samsung sm-j600f) using ODIN 3.14.1 and TWRPbut when I hit the start button I get <ID:0/004> Complete(Write) operation failed. error. The whole error message is as below:

```<code><ID:0/004> Added!!
<ID:0/004> Odin engine v(ID:3.1401)..
<ID:0/004> File analysis..
<ID:0/004> Total Binary size: 25 M
<ID:0/004> SetupConnection..
<ID:0/004> Initialzation..
<ID:0/004> Get PIT for mapping..
<ID:0/004> Firmware update start..
<ID:0/004> NAND Write Start!!
<ID:0/004> SingleDownload.
<ID:0/004> recovery.img
<ID:0/004> RQT_CLOSE !!
<ID:0/004>
<ID:0/004> Complete(Write) operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)
</code>```

I have tried using different cables and different TWRP and ODIN versions but none helped. The TWRP and ODIN versions I used are as follows:

ODIN v3.14.1

ODIN v3.13.3

TWRP-3.2.3-j6ltedx-unofficial

TWRP-3.2.3-TwrpBuilder-j6ltedx-2018-08-21_14-15

Also, I have enabled OEM unlock and USB Debugging modes as well.

What could be the reason behind the problem? All help will be appreciated.


问:
Finer grained audio and Bluetooth control?
I'm running OnePlus 6 with current oxygenOS (10.3.7) based on Android 10.

When listening to music on a Bluetooth device it's really annoying to hear notification sounds, is there any way to get finer control which audio goes to BT and which plays locally?
It's a shame notifications on apps like WhatsApp seem to be controlled through Media not Ring.


问:
2.4 GHz wireless headset connection to Android for calls
Got one of these radio wireless 2.4 GHz headphones with a USB dongle (not Bluetooth) - HyperX Cloud Stinger Core Wireless 7.1 PC.

Tried plugging the dongle into my android phone (Galaxy A40, Android 10, 4.4.177-18598463) via an OTG cable and the headphones work with the media output.

But for calls in Skype and Teams the sound goes to the phone's speaker.

I guess there might be a standard with these 2.4 GHz wireless headphone dongles because it just works with Android with no additional apps or drivers.

What is the name of the standard?

Is there a way to make calls with an Android with these headphones?

Edit: I think the headset gets detected as a USB headset (I checked using the "Device Info HW" app), so the question becomes how do I configure Android to use the USB headset for calls (Skype, Teams).

OwnerDisplayName: axk


问:
How to fix apparently-incomplete adb backup?
I need to hand in my old phone, but before I do, I want to be sure I am not going to lose any data, including app data.

I've tried the usual adb backup -apk -shared -all, however this produced a file that is a little under 9 GiB. The device capacity is 64 G and is almost full. Also, I made a backup about five months ago that is a much more plausible 45 GiB. Alas, I don't recall what command I used five months ago. (More specifically, I don't remember what arguments; I'm 99% certain it was some invocation of adb backup.)

What am I doing wrong? How can I back up "everything"? (I don't need e.g. OS stuff, but I definitely have more than 9 GiB of pictures, user-installed apps, and such.)


问:
Switch to speaker when using a headphone with wearing detection
I have a headphone with wearing detection, which pauses playback when I take off the headphone. However, with it off, I am not able to hear any notifications from the phone. I know iPhone has the feature of sending audio to the speaker when one takes off airpods. Do we have this feature in Android? Is it a problem of the phone or the headphone? In case it matters, I am using a SonyWH-1000XM4.</p>


问:
Tablet cam on: feedback using light
I love the way my laptop indicates when the webcam is on by illuminating the LED next to the cam.

I wanted to try to get similar behaviour out of my Android tablet where it could indicate by some cue that the front cam was on. Maybe the LED blinking or something similar.

I find sometimes I may start a zoom call and then shift focus to a different app and it may not be obvious to me that the camera is still on.

Any way to achieve this? Either natively or using a third party app or script etc.

If it matters I am using the Samsung S6 Lite tab.

Title: Tablet cam on: feedback using light


问:
is there a way to reboot device without any keys and usb debugging turned off
I had been using my phone for last 1.5 year ( Lava z90). But recently it's power off button and volume buttom are not working and also my usb debugging is turned off.2 days back my phone is switched off and I am not able to swich on it. Is there a way to turn it on?</p>


问:
Getting rid of "X Google enrollment" in Android 11? since I don't use Assistant
Since I have a new phone with Android 11, every now and then I see a notification about "X Google enrollment" whatever that may be.
Upon searching around I see it's nothing to worry about, it's just part of Google Assistant.

However I don't use Google Assistent, I have turned it off completely. Yet this "X Google enrollment" is still happening.

Is there I way to get rid of it? And I mean not just the notification (sure, I can disable that) but the thing itself. I'd rather not want any unnecessary processes to start or run at all.


问:
Problem of popups in my POCO M2
These popups are in my screen from the day I bought my POCO M2 and they last for long time. And when I am doing something else they come in between. They interfare while typing and selecting options. Moreover, they are annoying. Anyone has idea??

Title: Problem of popups in my POCO M2


问:
How to check if notification delays are because of WiFi?
I sometimes get delayed or no notification of whatsapp and Instagram. How to check if it's my wifi's issue or if it's my phone's?</p>


问:
com.termux linked or mounted on SD (Root Available)
So I'm trying to get more space into my termux to download and use
I'm trying to mount the folder onto the SD does anyone know how to already or done it?
I've seen that it isn't possible but I don't see why wouldn't it be especially with root</p>


问:
Does ShareIt use the content we share?
In the TOS it seems they say that we give right to use our content.

Title: Does ShareIt use the content we share?


问:
In TWRP Wipe button, the description in the slider say "factory reset" but its other description doesn't seem so. Which one is correct?
When I access to the TWRP (version 3.2.1-0) and select the Wipe button, the screen says:

Wipes Data, Cache, and Dalvik (not including internal storage)

Most of the time this is the only wipe that you need

But the description of the slider says:

Swipe to Factory Reset

Is Factory Reset the same with Data, Cache, and Dalvik wiping? What is the difference between the data it is about to wipe and internal storage?


问:
"System Memory" taking up too much storage
I have been facing this problem recently, my Samsung S 10+ has the storage information as shown in the image below. I don't know why the system memory is taking up 20 GB of storage. I cannot access it as well. On clicking it nothing happens. Would really appreciate help.


问:
how to take screenshot and disable flag_secure
I am kind of surprised that there seems to be no clear way to do this.  I have a rooted pixel 4 with android 11. I can't pass ctsProfile but it is rooted.

I have also tried to use Taichi apk to create an app with disable flag_secure but the newly crated apk does not work.

Please can anyone show me how to disable flag_secure exactly? I did not know it is this annoying even after rooting.


问:
Phone keeps rebooting on Volume Up + Power (trying to install ROM)
I tried to install Android's ROM and got ERROR 7, then I wiped out cache, data, internal storage, where was twrp.apk installed.

After that I cant get into boot menu (with Install, Wipe... buttons).

Then I copied twrp to the phone:

sudo fastboot flash recovery <twrp.img>

Tried versions 3.2.1-0 and 3.4.0-0, because I heard for certain phone (I have Xiaomi Mi4) it's necessary to use proper version, though I don't know which.

What's going on now:
I can successfully can get to the nice splash screen using Volume Down + Power, then on my PC I give sudo fastboot reboot command and press Volume Up + Power and here is the problem: It has no effect, it just keeps rebooting (I see only Xiaomi's logo).


问:
Google Photos - Stop asking to allow edits?
I just got a new phone, I upgraded to a Samsung Galaxy S20 Plus from an LG G8X, and whenever I edit a photo using Google Photos, it always asks me to ALLOW the edit. The Google Photos app never did this on my old LG G8X, so how can I get my new S20 Plus to do the same thing, always allowing my edits without being asked?

I have a pic here illustrating what I'm asking about:

It's not really a problem, more of a minor annoyance that I can live with if there's no solution. Still, If anybody knows how I can set Google Photos to always allow my edits I'd really like to know.

I hope you and your family are all staying safe and healthy! Thanks so much. And Happy Holidays!


问:
phone is on recovery mode , usb debugging is disable and power button is not working ? how to on or format the phone (samsung j7 2016)
i have samsung j7 2016 when i take out the battery and put it back it on without pressing power button and directly takes me to the recovery and I cant select anything because my power button not working plus my USB debugging is disabled</p>


问:
What creating bootloop when flashing TWRP?
I follow this XDA tutorial to flash TWRP and rooting Samsung Galaxy J250F. However, after flashing TWRP via Odin, the phone only boots into recovery, not system. Even factory reset or empty the misc partition cannot help. I have to reflash its stock ROM. This erases TWRP and replace with the stock recovery.

This is what the tutorial says, which I follow exactly:

Flash with ODIN in the AP slot.

Put your device in DOWNLOAD mode.

Uncheck Auto reboot.

Load the respective file below into the AP slot and hit start.

After flashing and ODIN reports PASS immediately reboot to recovery by holding POWER + HOME + VOL DOWN.

As soon as the screen goes blank change to VOL UP whilst still holding POWER + HOME.

You should now see TWRP recovery.

Yes I see TWRP recovery, but now the system cannot be booted.


问:
Scroll problem with my android mouse
I have a HUAWEI MediaPad M5 Lite 10 tablet I use it with a mouse connected to USB thanks to this adapter.

For some time with my mouse, I can no longer scroll through the pages of browsers like Firefox or Chrome where another browser.

Rather than scrolling the text from top to bottom or vice versa, it selects the text for me!

I can no longer also do a copy / paste in the web pages, it selects but without displaying "copy / paste" I reset my tablet but it doesn't change anything.

I reset my tablet by following this procedure but it doesn't change anything.

I changed the adapter, tried with another mouse, with a bluetooth mouse but it's the same :(

I sent my tablet to the after-sales service 3 times for this problem but it came back each time as repaired but the problem is still present.

The funny thing is that when I take control of my tablet with my computer and with teamviewer I use my computer mouse! Well it works.

I can scroll web pages through my computer. An idea ? Thank you

Title: Scroll problem with my android mouse


问:
Can't write to internal storage on a rooted phone
I have a Samsung Galaxy A5 (2016) which I rooted with Magisk.

Now in the process of installing TWRP and customizing my phone, I might have run some shell commands, like mount or sudo in a place where I shouldn't had.

So now some folders in my /sdcard/ are now "locked". Apps can't write to them like Whatsapp, Telegram, Camera, for example the messaging apps can't download any media, I can't take any picture with Camera.

When I try to delete a folder or a file with the built-in File Manager, it just doesn't succeed.

With adb shell I tried this command: rm -r /sdcard/Telegram/Telegram Images but I get permission denied, but running it as root works: su -c rm -r /sdcard/Telegram/Telegram Images.

What I did was, I checked ownership and read/write accesses with ls -al and I compared the results with a normal phone, EVERYTHING looks fine! User owner is root and group owner is sdcard_rw, folder permissions look like this drwxrwx--x and file permissions look like this: -rw-rw----.

This issue has been hunting me for a couple of months, my phone is almost unusable, sometimes app work, sometimes they don't. Please tell me how I can provide more information to help solve this problem, thanks very much.


问:
Making apps installed by Owner visible to other users/profiles
So, as you might know, Android 10 supports Multi-User feature (for reference - this thing)

I have some apps from F-Droid, installed while on Owner profile. But most of the apps are only visible to Owner (I suppose those are User apps, as the universally visible are System apps).

But how can I make some of these apps visible to other profiles so I can use them with all the features provided with separate user accounts (e.g. compartmentalized app data)? Preferably using only one device, without ADB connection to PC, and without re-installation.

There are similar questions on this topic (1, 2, 3), but the answers are outdated. The newest one is 7 years ago.


问:
Hide specific intent filters
I have several apps on my device that has multiple intent filters, which clutters the menu when I want to open a file(e.g. PDF). I would like to hide some of these intent filters, as I do not need them.

This is a picture of the intent chooser:

I know that iOS has an option to hide these targets under the "More" menu, can this be done on Android? I am using One UI 2 (Samsung) and MIUI 10 (Xiaomi).

Thanks

Title: Hide specific intent filters


问:
How i can solve this issue of USB data transfer?
I am using oppo A1k cell phone,Its Android version is 9. But when i try to connect it with my Laptop running windows 10, and out of 3 options(charge only,transfer files,transfer photos) i select transfer file option because i want to transfer files from my mobile to Laptop but i still couldn't see my phone appearing in my PC. It does appear but only for a very small instant, and then the window shown in attached snapshot keeps opening again and again


问:
Is there any way to share image+audio from an android device to a pc without mirroring?
I have a robot that uses android (API 22) but it doesn't have screen mirroring. One of our clients wants to stream the screen and internal audio (not the voices from people outside) of this robot to their pc, but I have no idea how or even if it's possible to do without mirroring. I tried AnyDesk but it doesn't allow me to share audio.

I've been looking for possible solutions but I havent found anything.

Any idea on how to achieve this?

Thank you, best regards.


问:
Busybox is not detected even when it has been installed
The Debloater module module of Magisk tells me that Busybox isn't detected:

```<code>root@android:/data/adb # debloat
debloat
! Busybox not detected
Please install one (@osm0sis' busybox recommended)

=========================================
Debloater (Terminal Emulator) v17.3.3(76)
by veez21
=========================================
BusyBox not found!

=========================================
</code>```

However I've installed it via Magisk Manager, and I have rebooted after installation.

Why is that? Is it a problem?

There is a similar question, but it's because the OP confuses Windows command and Android shell command.


问:
Can I move an app's data to another phone?
I have a game running on an old phone and since the game doesn't save any data in a cloud and neither does google play, I wanted to transfer the data from my old phone's storage to my current one, or just save it on an external drive for when I uninstall the game. Where do I find the data folder, and where do I have to put it on the drive/other phone?

(both are Android just to clarify)

The link to the game is https://play.google.com/store/apps/details?id=com.ironhorsegames.idlewasteland

Thanks in advance.


问:
Laptop doesn't recognize phone connecion
My Samsung a20e is not recognized by laptop.

When connected,phone is charging but nothing changes in computer. No notification, nothing in device manager. Phone is in mtp mode and I installed all drivers.


问:
Connect Synology NAS to samsung android phone trough sftp with samsungandroid "My Files" app
There is a "DS File" Synology app to browse your Synology NAS via your Android phone, but the app is really laggy etc. On Samsung phones there is the "My File" app, a file browser that really does the job, and that would be perfect could it browse the NAS. (In fact I already tested it when the phone is on the same (wifi) network as the NAS as the app allows it with the "connect to a network drive (SMB)".)

Now, the app also allows to connect to an FTP or SFTP server. Hence in Synology I did a "control panel -> FTP -> Enable SFTP server" with port number 16666 (in the range allowed by my router) and a "control panel -> Terminal & SNMP -> Enable SSH Service" with the same port. Then I said to my router to forward that port.

In the "My File" app, I did an "add SFTP server" where I added the IP address from the Synology NAS, the 16666 port, my admin user name and password, and I keep having an error not allowing me to connect.

OwnerDisplayName: Olorin


问:
How can I remove Amazon Prime Video from my Android device using the Android Debugging Bridge (ADB)?
I'm following this guide to remove bloatware on my Android device. So far I was able to remove the apps that I didn't want on my phone, but whenever I try to uninstall Amazon Prime Video using ADB I keep getting thrown this error:

Failure [not installed for 0]

The command that caused this error to appear was:

pm uninstall -k --user 0 com.amazon.avod.thirdpartycilent

Why am I getting this error and how can I remove Amazon Prime Video from my phone? I can see that the app is installed for me (see below) but it shows up as if it isn't installed whenever I try to uninstall it using ADB.

My phone's model is an LG G8 ThinQ and it runs Android 10.


问:
How to create QR contact code from vCard
Just came across a website with a QR code that when I pointed the mobile phone camera towards it (I am using a mobile phone with Android 10), it opened a window with Name, Phone, Email, Website, Title and a button to "Import contact".

I know that it is possible to generate QR codes specific for social medias, like WeChat and Facebook and those will detect your social medias, but I am wondering if it is possible to generate a QR contact code readable solely by the camera of my mobile device, ideally from my vCard with similar functionalities as the one above, more specifically the "Import Contact" option?

If yes, how do I do it?


问:
Can't install apk using sh script and init.d app
I'm trying to install apk when the device is booting.
I wrote shell script to install apk:

```<code>#!/system/bin/sh
pm install /data/local/tmp/MagiskManager-v7.1.1.apk
</code>```

Unfortunately, when I enters the shell (using 'adb shell') and runs the script(using 'sh my_script.sh')
I get error:

```<code>Exception occurred while executing:
java.lang.IllegalArgumentException: Error: Can't open file: /data/local/tmp/MagiskManager-v7.1.1.apk
        at com.android.server.pm.PackageManagerShellCommand.setParamsSize(PackageManagerShellCommand.java:461)
        at com.android.server.pm.PackageManagerShellCommand.runInstall(PackageManagerShellCommand.java:1060)
        at com.android.server.pm.PackageManagerShellCommand.onCommand(PackageManagerShellCommand.java:169)
        at android.os.ShellCommand.exec(ShellCommand.java:111)
        at com.android.server.pm.PackageManagerService.onShellCommand(PackageManagerService.java:22472)
        at android.os.Binder.shellCommand(Binder.java:881)
        at android.os.Binder.onTransact(Binder.java:765)
        at android.content.pm.IPackageManager$Stub.onTransact(IPackageManager.java:4924)
        at com.android.server.pm.PackageManagerService.onTransact(PackageManagerService.java:4118)
        at android.os.Binder.execTransactInternal(Binder.java:1021)
        at android.os.Binder.execTransact(Binder.java:994)
</code>```

I already tried to put the apk in /data/local/tmp but it's not working.
Also init.d app failed to run the script


问:
Does Android disk encryption use device-specific keys (such as IMEI or model) to encrypt the disk?
This question is about how disk encryption for Android 6.0 works.

In short: Does Android 6.0 disk encryption use any device-specific keys (such as IMEI or model) to encrypt the disk?

In detail:
I'm trying to recover data from a Nexus 5 phone with a damaged motherboard (due to short circuit).
It was running Android 6.0 with a disk that was encrypted using a user PIN (Device was shipped with an unencrypted Android 4.4).

To recover the data, I'm thinking to buy an SMD rework station to do a chip-off of the memory chip to a new Nexus 5 device, and then turn on the phone, enter the PIN, and get access to my files.

I'm trying to understand, since the disk was encrypted - would this work?
Would a new device with an old eMMC memory chip boot?

If disk encryption on Android only uses the user-entered PIN to encrypt the user-created data, I think this would work. If it uses device-specific values (such as IMEI or model) either in concatenation to the user-entered PIN or as a salt, soldering the old memory to a new device won't work.

According to Full-Disk Encryption in the android open-source documentation, it looks like in Android 5.0 to 9.0 only the user-created data is encrypted, but not the OS itself. The Storing the encrypted key section says

Hardware backing is implemented by using Trusted Execution Environment’s (TEE) signing capability. Previously, we encrypted the master key with a key generated by applying scrypt to the user's password and the stored salt. In order to make the key resilient against off-box attacks, we extend this algorithm by signing the resultant key with a stored TEE key.

Does this mean the encryption uses a hardware-specific key? An expert's help would be greatly appreciated. Thanks.


问:
How do I do a screenshot on a RCA 10" tablet?
My RCA only has touch screen volume control. Holding down the power while touching volume down doesn't work. Is there another way?</p>


问:
Google Assistant routine only executing first command?
I have a Google Assistant routine with 2 custom actions: Navigate to home and Play Spotify music.

For some reason, only the first action ever completes when I execute the routine via voice command. If I swap the actions around, the first one always completes. So if I have playing music first, it plays music but does not navigate. Vice versa, if I have navigating first, it navigates but does not play music.

Any way to fix this?


问:
Can we use Odin/Heimdall to emulate a fake flash (without real hardware connection)?
As my title suggests.. is there a method to flash a (samsung) firmware on a formatted sd card (fat32 I guess? And 16gb too?) instead of an actual phone (flash emulation) using pit file in heimdall/odin or changing values in heimdall/odin to make it happen?

What I want to do : Just partition and flash the bootloader and kernel partitions to an sd card (it should be partitioned in a similar way as it happens after flashing them on internal memory normally through odin.. problem is .. phone is deadboot i.e can't go in download mode and I want to get the correct bootloader and primary partitions on the sd card and try to boot through it in download mode and reflash normally..)

I have firmware but I cannot seem to get it flashed (or in other words, partitioned according to pit file) on an sd card without actual working phone sadly. I tried and researched a lot but couldn't find exact answer.

Furthermore, repairing in a local shop or a box isn't an option. And can't afford replacing motherboard etc. Any help or guidance would be greatly appreciated. Thanks !


问:
ADB - Not able to wipe data. Tried a lot of things
I tried wiping my old Lenovo tablet using the following methods but none work

Factory reset through the phone

Erase all data using Google's Find my Phone

'wipe data/factory reset' -> 'Yes -- delete all user data' reset using the bootloader

So I installed ADB through android-tools on my latest Manjaro Cinnamon as well as android-udev and tried the following but they don't work either.

```<code>$ recovery --wipe_data
/system/bin/sh: recovery: not found
127|shell@android:/ $
</code>```
```<code>$ wipe data
Wiping /data
Error opendir'ing /data 'Permission denied'
Done wiping /data
shell@android:/ $
</code>```
```<code>$ adb shell am broadcast -a android.intent.action.MASTER_CLEAR
Broadcasting: Intent { act=android.intent.action.MASTER_CLEAR }
Broadcast completed: result=0
</code>```

The device won't load as fastboot nor is there an option to fastboot under recovery or developer tools. So 'adb reboot bootloader' or 'fastboot' devices does nothing either. No root access option in developer tools either. So:

```<code>$ su
/system/bin/sh: su: not found
127|shell@android:/ $
</code>```

and

```<code>$ adb root
adbd cannot run as root in production builds
</code>```
```<code>$ rm -rf /data/*
rm failed for -rf, No such file or directory
</code>```

So I don't know how to proceed and feel like I am out of options. Can someone help me please?


问:
Heimdall gives ERROR: Failed to receive handshake response. Result: -7 on samsung J5 (2016)
I am trying to connect to a Samsung J5 (2016) SM-J510FN, using linux ubuntu 20.04 (libusb-1.0.0), to flash a TWRP image using heimdall v1.4.2 (build from master a2cfdaa)

I have set the udev based on the git repository android-udev-rules

Mobile has USB debbuging on and OEM unlock. And using samsung cables for connection

Mobile phone is visible on lsusb either in normal OS boot or in download mode

```<code>Normal Boot:
Bus 001 Device 096: ID 04e8:6860 Samsung Electronics Co., Ltd Galaxy series, misc. (MTP mode)

Download mode / Odin mode:
Bus 001 Device 097: ID 04e8:685d Samsung Electronics Co., Ltd GT-I9100 Phone [Galaxy S II](Download mode)
</code>```

Running heimdall print-pit works without problems. But then:

```<code>heimdall flash --RECOVERY twrp-3.4.0-0-j5nlte.img  --stdout-errors --verbose --no-reboot

Initialising protocol...
ERROR: Failed to receive handshake response. Result: -7
ERROR: Failed to receive handshake response. Result: -7
ERROR: Protocol initialisation failed!

ERROR: Protocol initialisation failed!

Releasing device interface...
</code>```

My computer only has usb3.0 but also tried with a porthub for usb2.0, this looks like issue #209

Any ideas or tips on how to solve this problem ?!


问:
No Graphene or Lineage support...am I stuck carrying a google-tracker now? (LG "Journey" on Tracfone)
I prefer flip phones but now I need web access while on job-site, I don't know why I thought I could just put Lineage onto any handset (swore you could just root a phone and put a new OS on, didn't recall it being model-specific but haven't used smartphones for nearly a decade)

What can I do to eliminate, or reduce if that's all I can do, my "google footprint" here?  I've used ADB to remove every package with "google" in the title but that doesn't remove all the google stuff (and some of it simply cannot be removed, one of them - if removed - makes it so the phone will go into an endless loop upon reboot, requiring a full hard-reset)

Thanks a ton for any advice, I know about F-Droid and am using the duckduckgo browser and FOSS alternatives to, say, Calendar adn Youtube-viewer but the fact it's still on this device/hardware that seems to have "Google" tattoo'd to its bones is bothersome, any & all things I can do to ameliorate this would be greatly appreciated!!


问:
Use same app data with another user (on Android 10)
I have a Samsung Tablet running Android 10. My kid uses a "restricted user" (password-protected) to play etc.

Now, since the Lego BOOST app is also installed on this restricted user account, I would like to make it possible for him to use the tablet without me unlocking the user - my boy does not know the password and I don't want him to know ... but specifically for the Lego BOOST app I would like him to be able to use it without me being around.

So, in technical terms, I want to "share" all his user data (already unlocked data in the app) with another user account which would NOT be password-protected - or with a password I can tell him.

Is it possible to share the same app data between 2 users? Or, alternatively, is it possible to "move"/transfer the app data to another user account?


问:
Is it possible to merge/network multiple smartphones and use them as one device?
I have 4 android smartphones each with 512 gb memory card. Is it possible to somehow combine them together so that I can access a total of 2TB?

My exact use case is to install kmplayer on one of those devices and network/merge the others such that the primary device has access to all the content as if it was on that device itself. I would leave all these phones at home and access the primary device, via some app like splashtop, from the phone that I have on me.

Am aware of cluster/distributed/HPC computing concepts to get many mainframe/workstation/server/home pc systems(and even the raspberry Pi using Beowulf cluster) to work together but in those cases almost all resources are desired to be used unlike my case where I only intend to combine the memory card storage resource.


问:
External SD Card Mounted, Permissions granted, but still Inaccessible on LineageOS
I know there's a ton of external SD card questions, but my case doesn't seem to line up with any of them, sorry if this has been asked before and I just couldn't find it.

I'm running LineageOS 14.1 on a Fire HD 10 Gen 7. When I insert my SD Card the system recognizes it, I go in and make sure that all the apps that need it have permission to access SD card storage, and I enabled Global Namespace in Magisk. But LineageOS only mounts it to /mnt/media_rw/0000-0000 and there is no way to access it without going through the root directory.

Using a root browser I can see all of it's contents, but I can't access anything using any other apps. For example, I can see there's an mp4 file in the file browser, but if I open with VLC via the root browsers VLC immediately crashes. And if I try to go to the SD card via VLC, it isn't there, the only storage is Internal Memory.

All the other question articles I read were either concerning moving apps to the SD card, which I was able to do with Link2SD when creating an ext4 partition on the card, but the FAT32 partition was still inaccessible even by the apps on the ext4 partition which makes me think the issue isn't with the SD card (the SD card also works as intended on my PC), or were solved when they enabled permissions for the apps to access external storage, which I have done.

What do I need to do to make the SD Card accessible by apps other than my file browser?


问:
What is the way to debug multiple android device ie more than number of ports in PC in parallel?
I need to connect 10 device via usb at once. Does adb detect multiple android devices connected via usb hub?
I have explored connecting via tcpip one by one using the existing ports, but the problem is if the LAN is not very stable , it gets disconnected and I have to connect all over again. If I could connect all my devices via usb hub I wont have that issue.

I have gone through this issue: Using USB peripherals with hardware debug


问:
Android 11 - Default Text Messaging App - SMS button not showing for some contacts
On Android 11 - Default messaging app:

When I type some text, "SMS" appears under the send button for some contacts but not others.

Just curious as to why.

Contact 1:

Contact 2:


问:
Where does your Samsung phone store its default ringtones?
So my grandma gave me a Samsung Galaxy J2 Prime from 2017, and it doesn't have any SD card inserted. So where does my phone store its defalt ringtones and notification sounds? I tried going to Android>data>system>media>audio>ringtones but it seems it doesn't have the system folder. Can someboy help me with this?


问:
Galaxy S3 : Impossible to go to recovery or download mode
I've just get an old Galaxy S3, with this mission to backup existing photos on it.
Of course, it's not rooted and not backuped... :) Original setup (ROM, ...)

When starting it it's stucked on Galaxy S3 logo screen without any change.

When trying to go to download mode : It's keep restarting after 2-3s
Same for recovery mode.

Each time I removed battery. I've tested with the phone plugged in or not. Plugged to the computer or not, etc...

Any idea? :)

Thanks
Philippe


问:
Moving files (within the same disk) means "copy and delete"?
I have Moto E6 phone with Android 9 Pie and external SD card, I need to move large folder to another location on the same card but all file explorers I tried so far were trying to copy data to the new location and only then delete it from old location

Is this the way android is moving files/folders? The process takes forever and (if SD card doesn't have enough space for TWO copies of the same data, the process is terminated with error)

Once the phone was connected to windows PC, I was able to map internal storage as a drive and just move the folder from one location to another in a second.

Is there any way to force Android to actually move data to the new location without copying?


问:
Error While Flashing The Minix Neo X8-H Plus
I have tried everything I can think of, know about / usually would do in a situation like this. I have watched multiple tutorials, guides and more. I went to the official website itself multiple times to see if I missed anything, but to no avail nothing works. One day the box just stopped working, so then, I looked up the fix and they say that I am supposed to re-flash the box. I did that, and while I was doing that, this error popped up. I have tried multiple things including:

Using a different cable other than the one that came in the box ( data cable )

Using a different computer

Using a different port

Using a different wall socket

etc.

It has been over 4 years now since this box has stopped working, and it has been sitting around my house ever since collecting dust and it is about time that this gets fixed, thrown away in the trash, or scrapped for parts.

The smart box is a Minix Neo X8-H Plus that ran Android 4.4 Kitkat and uses an ARM Cortex-A9 Quad Core processor with 2 GB of DDR3. It used to run very smoothly until that one day. I hope someone can assist me here to hopefully getting this fixed. Thank you all in advance for any help or support that you can provide me with.

The error described above is displayed below. It always seems to occur right after the stage formatting before getting stuck at that stage for an extended period of time, at 3% Completion before going onto 4% Completion and then spitting out this error:

The newer versions of this Amlogic USB Burning Tool usually crash at this stage after displaying a different error entitled "Failed to Parse Image File", no matter which image file I use.


问:
Find out which app is making internet request
I'm tracing my network's DNS calls for a few days (using Pi-Hole to block ads and tracking) and I noticed that on my phone, something is calling checkip.amazonaws.com every 5-10 minutes. As I find this rather odd, I've been trying to find out which app is doing this and why.

I am running non-rooted Android 10. I tried with Packet Capture (which does not work at all due to SSL issue) and HttpCanary (which does not work too well due to SSL issue). HttpCanary does not show anything (not even SSL errors) during the time of the DNS request. I'm tempted to simply block this URL entirely but I'd really rather find out where it is coming from. So far, I'm puzzled where to look next.


问:
Emulator: emulator: ERROR: Not enough space to create userdata partition (Ubuntu 20.04)
I've been getting the error:

emulator:  ERROR: Not enough space to create userdata partition. Available: 6910.351562 MB at /home/codedoor/.android/avd/Pixel_4_API_29.avd, need 7372.800000 MB

I'm running Ubuntu 20.04.  Not sure if it's connected, but Android Studio was working perfectly fine until I updated Node and then the emulator would not run.

I've tried looking for a solution on various platforms, but none have worked so far.  So I completely uninstalled and re-installed it, including deleting related hidden files/directories.  I wiped the data using the AVD manager.

I tried:emulator -avd Pixel_4_API_29 -partition-size 1024 -wipe-data  &
emulator -avd Pixel_4_API_29 -partition-size 7373 -wipe-data
Both of which caused the same error. I've also checked to see that virtualization was still enabled.

Possible solution: how could I increase storage for Android emulator?  I've tried looking at Android Studio and its configurations, but this has eluded me.

Of course, any other solutions would be helpful as well.

Any help would be greatly appreciated.

Happy New Year, btw!  :)


问:
What URL can I hit to initiate call?
I'd like to be able to hit a URL with CURL from my laptop, and have it cause my android phone to initiate a phone call, on speakerphone if possible.

I'm using a Linux laptop with Firefox browser, and I have tel: links set to run a bash script.

I'd like my script to send a GET/POST to some google cloud API which subsequently sends a command from the cloud to my phone that causes my phone to initiate a phone call hands-free to a number I send in the GET/POST.

I will use this to make tel links clickable in my laptop's browser.  Browsing on android sucks.  Calling from a "hangouts tab" in the laptop sucks.  Combining in this way will avoid the most things that suck, which is my new years resolution.

I may also use this to automate calls to appointments/meetings that I need to attend.  i.e. at the correct time, my phone simply auto-joins whatever zoom meeting, without me having to remember it.  Bonus points if this API can also, optionally begin the call on mute.

Title: What URL can I hit to initiate call?


问:
Can't close browser tabs
I'm having an issue with an LG G pad.

Chrome 87.0.4280.101

Firefox Daylight 84.1.2 (Build #2015783145)

OS Android 5.1.1 LG-V940n Build/LMY47V

I don't do much with it other than email, browsing and Netflix. Everything was working fine until last month, then it decided that I can't close browser tabs anymore. I'm assuming there was an update that happened.

I have found three other posts on this (see below) sorry for the duplicate.

I can't open or close any tabs on my Android tablet in Chrome

I'm unable to toggle between Chrome Tabs

Can't switch/close tabs in the Chrome browser on my Android tablet

This happens with Chrome and has happened with Firefox too. Both and seems to be related to video. Once I view video in a new tab, I can't switch, close or create tabs. However, I can open links in new tabs, but I cannot switch to them. I can switch to/from private mode as well, but still can't do anything with tabs.

Additionally, I have tried simplified mode and desktop with no difference.

If I rotate the tablet it seems to unlock the tabs and I can switch/open/close them again.

In the posts above, mention going to settings->developer options which I don't have. And why should a simple user of chrome need to tweak any developer options.

Do I have any options than rotating the thing and waiting for an update that hopefully fixes the issue?

Title: Can't close browser tabs


问:
Android screen mirror to android with usb c to c cable
Can I mirror a note 10 screen to a Moto Z4 with a projection mod to project the Note 10 to my wall? The purpose is to play more powerful emulator games on the Note and use the Moto w/ projection mod just like a projector. I plan on doing this with a usb c to c cable. Is that even possible or are there alternatives?</p>


问:
Samsung Galaxy S4 Mail App not syncing while set to Automatic sync(Push)
It does sync automatically(push) only when I have opened the app. But today, eventhough I had it opened it didn't.
I would like my phone to sync auto even after I close the app.

I would also download another email app if necessary.

Android version 5.0.1


问:
Is there a way to tell if my car uses USB 3?
I use Android Auto. Currently, I have a genuine USB 3.x cable (I think it's 3.0 not 3.1), but due to some issues with how far out of my phone the plug extends, I am considering alternatives. The problem is there are very, very few genuine USB 3.x cables with lower profile plugs, while there are a ton of USB 2.0 options.

I have seen some reports that AA works better with USB 3.x, so I don't want to artificially limit myself to USB 2.0. However, if the car doesn't support USB 3.x, I might as well use a USB 2.0 cable.

Is there any way to tell (using a non-rooted Android device) if I am actually getting USB 3.x speeds?

(I know there are some indicators, such as if the port is blue or has the "SS" logo, but I'd prefer an answer based on something that would work for any vehicle without having to rely on the port being properly marked, i.e. if the port is USB 3.x despite not being properly marked, how would I know?)


问:
Is there a battery optimization app that allows me to turn or sync/data for all apps with an exception for certain ones?
I'm guessing there is a 3rd party app that does this, but I'm not sure. Is there a way to turn off auto sync for all apps with an exception for certain ones? For example, when I snowboard, my phone dies super quick from the cold + apps trying to sync and find service. I would just turn my data off or turn on battery super saver mode, but I use a music app, Bluetooth for my headphones, a ski tracker + GPS, and resort maps. Is it possible to turn everything else off?
I have a Galaxy S9</p>


问:
How to see my location log in the Google Maps without a working network connection?
I would like to see my google maps position log even if I was offline, or I did not use my phone.

My impression is that the position logging works only if either the phone is active or if I am on wifi.

I would like if I would see my position log more often. I think, the best would be if some background task would continuously (or, maybe in every 10 minutes or so) log my position data, save it, and upload to the google maps if I am online.

Is it possible somehow? It is not a problem, if it would require some other map application, although the gmaps would be ideal.

This answer works only if I manually turn it on every time. I do not want to do that, I need an automatic solution.


问:
Apps recently changed, without an update from the store
I've recently noticed that once in every few days, several apps on my phone suddenly show as "recently updated", even though they didn't get any update from the Play Store.
The way I can see that they were updated, is not through the Play Store, but rather through Nova launcher's "new/updated" apps category, and also through Total Commander's "Installed Apps" sorted by date.

Since it's a Pixel phone, I wonder if that could be due to some Google-related infra/library being updated in the background (just like the Play Store app sometimes auto-updates itself without any notice), or should I start worrying about malicious code slowly crawling through my phone and injecting itself into other apps?

A few points worth mentioning:

Phone isn't rooted, and doesn't allow to install third-party apps.

Developer options are accessible, but USB debugging is disabled, and I didn't change almost any setting there.

The Play Store app settings doesn't allow any kind of auto-update unless I initiate and approve each update.

The apps that change/update in each batch seem totally random: they could be of any type, and doesn't seem related to how frequently I use them (some of them I haven't launched in months, maybe a year or more).

Usually, no more than a few apps in each batch - and no more than one batch every 1-3 days or so.

These apps continue to get regular updates through the official Play Store and everything seem fine.

There are still many apps on my phone which weren't updated/changed at all, for some of them the last change/update was more than a year ago.

Any ideas on what or how to check this? Anyone else may have noticed similar behavior?


问:
Digitizer calibration or hardware issue?
I recently obtained a new galaxy tab A and have been noticing that touching small buttons in certain places is particularly hard (specifically the "read more" button in youtube comments).

After doing some experimenting with the developer options that show touch information, I found that the touch screen didn't want to register touches in vertical lines all across the screen. In particular, when swiping diagonally the registered line meanders to avoid moving horizontally then jumps across to follow my finger, like I'm pulling it across a washboard. Two lines in particular at dx 331.7/332.7 and dx 943.2/944.2 seem to catch the pointer like a cliff.

Is this a software/firmware issue? Or is this digitizer screwy despite being new? Can this be fixed with a factory reset, or not installing a recent patch, or updating firmware?

I've seen this behavior in an older tablet (Memo pad 8) but much worse, so much so that tapping on one of these lines would register a tap on either side of the vertical line, and scrolling would often create double taps. That issue manifested while playing a rhythm game, so I assumed some hardware cracked.


问:
Mobile AP gives "error" when trying to enable
I'm running Android Gingerbread 2.3.3 on Samsung Galaxy S - Captivate (SGH-I896)

I recently rooted my phone because my provider, SpeakOut, only allows internet access through port 80; apps weren't receiving or sending any data and neither was Mobile AP. I rooted the phone and installed Autoproxy to redirect all requests through port 80.

Now when I enable Mobile AP it shows Error; no details given. Is there anywhere to find additional details?

I have tried disabling Autoproxy and have tried enabling with both an Open security and a WPA2 PSK security setting. Mobile AP was able to enable before, but connecting to it gave "No Internet".

Does anyone have any idea of why this may be happening?

Thanks for the help!


问:
How can I install keyboard for android 4.0.4 on android 5.1.1?
My phone with android 4.0.4 is rooted and I got the SamsungIME apk and odex files, moved them to the phone with android 5.1.1, but when I try to install, it simply says "App not installed". I didn't expect it to be so simple...

I've searched everywhere, but I know both phones are too old and any forum or link I found was dead. But hey, I'm old school

I can see the apk's information but I guess it's in "machine language" because it just looks like letters and symbols. I wouldn't know what to do with it anyway

Here's some info if it's of any help:

The phone from which I want to get the keyboard is a Galaxy Pocket, android version 4.0.4 Ice Cream Sandwich, kernel version 3.0.15-1222370, keyboard version 1.0

The phone to where I want to move the keyboard is a Galaxy J1 Ace, android version 5.1.1 Lollipop, kernel version 3.10.65-12300964, keyboard version 4.0

If you need any more information, of course let me know, and thanks in avance, if you can figure it out I'll buy you an ice cream


问:
How to disable in-app browsers
I am currently using Google Family Link for my child's Samsung Android to disable web browsing but they are still able to click links within certain apps and open in-app browsers. This is the case in Skype and just about any other app with links within it.

Is there a way to disable in-app browsing altogether?

Thanks for the help.

Title: How to disable in-app browsers


问:
What is the format for an Android ROM?
I downloaded a ROM for a Xiaomi phone to see what's inside. It's a zip file, that has these inside:

```<code>boot.img                    META-INF               system.new.dat.br     vendor.patch.dat
compatibility.zip           product.new.dat.br     system.patch.dat      vendor.transfer.list
dynamic_partitions_op_list  product.patch.dat      system.transfer.list
firmware-update             product.transfer.list  vendor.new.dat.br
</code>```

I understand that boot.img is what is loaded on boot. It has the kernel and a ramdisk. But how can the bootloaded, or the kernel, or the ramdisk access the other files like system.new.dat.br? Both system.new.dat.br and product.new.dat.br are 1gb large, so I guess they have the system.

So my question is: what are these files and how does the boot.img contents load them?

ps: .br is a compresses archive. It decompresses to .dat, but what are the contents of these?

Title: What is the format for an Android ROM?


问:
Why does my phone battery die at 0% then it has more battery when I turn it on again?
So after dying at 0% when I turn it on again, it can have more battery like 26%. Why does this happen?
Does this mean my phone has a virus?</p>


问:
Is the fingerprint template generated by the vendor-specific library or the sensor?
My understanding based on the online resources is that there is a vendor-specific fingerprint library running in the TEE which is responsible for communicating to the fingerprint sensor hardware as well as enrollment, matching, ... of fingerprints.

What is unclear to me is what the sensor's output is? Does it generate the fingerprint template, or it sends just the raw fingerprint data to the library and the template is generated by the library?


问:
How do I test the headset microphone on android, whilst ignoring the phone's internal microphone?
I can't find any apps that do this on Google Play and testing the microphone in Discord isn't any help either.</p>


问:
How to setup employee device without Google Cloud
My organization has several phones which I would like to setup for employee use.  It appears that the Google Admin app has this functionality but requires a Google Cloud subscription.

If possible I would like to know what my alternatives are.  I want to be able to manage what apps are installed on the devices and allow app installs but be able to at least monitor what is being installed allong with basic features as an admin.


问:
Color temp changes depending on content
I have a OnePlus 6 and recently (past few months) I've noticed the color temp changing between a "warm" white and a more "pure" (not the bluish "cool") white.

You can't see it in the screenshots (because the phone doesn't see the difference), but I get the yellower temp with

and the whiter one with

The difference is the ad at the top of the first one.  When that scrolls into view, it goes yellow. When is scrolls out of view, it goes white.  (If I need to, I can record it with another phone.)

I have night mode, reading mode, "vibrant color effect," and adaptive brightness all turned off.

I'm quite confused, and it's really annoying.  Any ideas how I can get it to stop?

Title: Color temp changes depending on content


问:
How do I generate an IT Admin code to enroll devices
I want to setup a work profile on several devices but I need to be an IT Admin to do that and generate an IT admin code.

How do I do that?

I have about 3 devices that I wish to enroll.


问:
How are AOSP compiled .img stores in phone flash?
There are the contents of a Xiaomi image for some phone that I downloaded. It is a fastboot image. I think that it means that it can be flashed by fastboot.

```<code>├── AP
│   ├── APDB_MT6768_S01__W2006
│   └── APDB_MT6768_S01__W2006_ENUM
├── BP
│   ├── DbgInfo_LR12A.R3.MP_HUAQIN_Q0MP1_MT6769_SP_MOLY_LR12A_R3_MP_V98_P75_2020_12_11_16_34_1_ulwctg_n
│   ├── MDDB_InfoCustomAppSrcP_MT6768_S00_MOLY_LR12A_R3_MP_V98_P75_1_ulwctg_n.EDB
│   ├── MDDB.META_MT6768_S00_MOLY_LR12A_R3_MP_V98_P75_1_ulwctg_n.EDB
│   └── MDDB.META.ODB_MT6768_S00_MOLY_LR12A_R3_MP_V98_P75_1_ulwctg_n.XML.GZ
├── BP_IN
├── CheckSum_Gen
├── check_sum.sh
├── flash_all.bat
├── flash_all_except_data_storage.bat
├── flash_all_except_data_storage.sh
├── flash_all_lock.bat
├── flash_all_lock.sh
├── flash_all.sh
├── flash_gen_crc_list.py
├── flash_gen_md5_list.py
├── flash_gen_resparsecount
├── hat_extract.py
├── hat_flash.sh
├── images
│   ├── boot.img
│   ├── cache.img
│   ├── Checksum.ini
│   ├── crclist.txt
│   ├── cust.img
│   ├── dtbo.img
│   ├── exaid.img
│   ├── gsort.img
│   ├── lk.img
│   ├── logo.bin
│   ├── md1img.img
│   ├── MT6768_Android_scatter.txt
│   ├── oem_misc1.img
│   ├── preloader_merlin.bin
│   ├── recovery.img
│   ├── scp.img
│   ├── sparsecrclist.txt
│   ├── spmfw.img
│   ├── sspm.img
│   ├── super.img
│   ├── tee.img
│   ├── userdata.img
│   ├── vbmeta.img
│   ├── vbmeta_system.img
│   └── vbmeta_vendor.img
├── libflashtoolEx.so
├── libflashtool.so
├── libflashtool.v1.so
├── Log
│   └── ADPT_20201218-033445_0.log
├── md5sum.xml
└── misc.txt
</code>```

I never compiled Android. I'm gonna buy an SSD just for that, but meanwhile I'm trying to understand the output of the AOSP project when I build everything.

I found this: https://stackoverflow.com/questions/65450678/how-is-the-aosp-project-built/65527251#65527251 which explains how some .img are built. For example, this is how system.img is built: system.img

Looking at the structure of the ROM above, I guess the only things produced by AOSP are the .img. I guess the flash_all.sh is an script that flashes all the images to the flash memory.

How are those images stored in the flash memory? How does fastboot knows where to place each .img?

If we look at the flash_all.sh:

```<code>fastboot $* flash cache `dirname $0`/images/cache.img
if [ $? -ne 0 ] ; then echo "Flash cache error"; exit 1; fi
fastboot $* flash recovery `dirname $0`/images/recovery.img
if [ $? -ne 0 ] ; then echo "Flash recovery error"; exit 1; fi
fastboot $* flash boot `dirname $0`/images/boot.img
if [ $? -ne 0 ] ; then echo "Flash boot error"; exit 1; fi
</code>```

it passes a different name for each .img. Maybe there's a 'fastboot server' on the phone that knows where to place each image?


问:
Android Studio emulator: Failed to start monitoring emulator-5554
I am forking this app and trying to make some changes to it and run it. I've managed to do so on my laptop but it's painfully slow, so I am trying to set up the whole thing on my PC but I get the following error:

```<code>Failed to start monitoring emulator-5554
</code>```

the emulator started and it showed the Google logo but then it closed.

This is happening on a device called: Pixel 3a API 30 x86.

I have another device (Pixel XL API 29) set up but there the emulator doesn't even show up and there are no errors in Android Studio.

The only resources I found matching my question is this and I've tried restarting my computer several times but it didn't work. And this one but my android emulator seems to be the latest version.

All this is happening on Ubuntu 18.04.

Android Studio version is 4.1.1.

Any ideas appreciated!

EDIT 1:

Currently, I am trying to run the emulator from the command line. At first, it was complaining of another instance already running even after restarting my PC. So, I found some multinstance.lock files and deleted them. Then, it complained about permissions in the particular AVD folder so I did chmod -R 777 the whole avd folder. Now, it complains that it cannot create a vulkan instance or something similar and that it doesn't have access to a particular file in the user's home folder, I couldn't copy the whole output cuz my PC got stuck and I had to restart it. This happened several times.


问:
Termux (specifically npm) can't install in internal storage
Everytime I try to use NPM to install something into /storage/emulated/0/dir it would always do this:

```<code>npm WARN tar EPERM: operation not permitted, futime
npm WARN tar EPERM: operation not permitted, futime
npm WARN tar EPERM: operation not permitted, futime
npm WARN tar EPERM: operation not permitted, futime
npm WARN tar EPERM: operation not permitted, futime
npm WARN tar EPERM: operation not permitted, futime
npm WARN tar EPERM: operation not permitted, futime
npm WARN tar EPERM: operation not permitted, futime
npm WARN tar EPERM: operation not permitted, futime
npm WARN tar EPERM: operation not permitted, futime
npm WARN tar EPERM: operation not permitted, futime
</code>```

It has access to download things using git and other methods but it never seems to work using NPM.


问:
My keyboard is no longer switching languages
I have a weird thing in my phone, usually I used to switch languages by swiping the space button. But suddenly its gone. This started after I added temporary a third language, and removed it. Now my only option to change the language is going into the settings and enabling only the language I want. If more that one language is used, the last one from the list is chosen.

Is that a bug or did I mess up the settings?

I'm using Android 2.3.5, on a Galaxy S 2. And I'm using the standard Samsung keyboard that can with the device.


问:
Wipe option is missing
I lost password for my phone and now I cannot unlock. I think only option what I have is completely wipe device (data lost is not matter). I googled many manuals and videos and it looked very easy. Boot into recovery menu and click to wipe button but in my case there is no wipe option. I's really weird because the resources what I found was for the exactly same device (region differences?).

How to wipe this device? Do I need to have special cable? Which one?

Model: Lenovo K5 PRO (L38041)

Title: Wipe option is missing


问:
Use Powerpoint inking feature on my laptop from Android Tablet
When presenting Powerpoint slides via zoom on my Win10 laptop it is convenient to annotate on the slides in response to audience questions etc. Powerpoint has a convenient annotate feature but it's not easy to draw using it via the mouse or laptop touchpad.

On the other hand I do have a nice Android Tablet with an Active Stylus (Samsung S6) where it's a breeze to draw. But is there any way I can hook up the Tablet to the laptop (via a third party app etc. if needed) so that I can use the native Powerpoint annotation feature but via the Tablet.

PS. Right now I use a hack: I open a second zoom instance on my Android Tablet and use zoom's annotate feature (so I can use my stylus). But then the annotations have to be erased after each slide and cannot be saved easily etc.


问:
How change language of location names in google maps
It seems google maps recognizes my android's phone language & configs itself based on that language.

My phone language is english.(But this is not my local language)

So google maps shows all location names in english language.

How can i change those names to local without changing my phone's language?

OwnerDisplayName: SilverLight


问:
Android PC linux installation on Acer DA220HQL
I have got an android PC (Acer DA220HQL) running Android 4.0.4 with the following specifications and i would like to know if there is any installation procedure step by step to install other (linux-based) OS such as Zorin OS lite as many Google android tablets are locked from installing other OS.

That would help me a lot!

Regards


问:
How to select whole line of text?
Sometime there is a need to select only one line of text or paragraph from very large article?
Instead of manually enlarge the range of selection, is there an option at popup that can select line in one/two clicks? I had trouble of selecting long instruction that are outside of the screen.
Selection is in chromium based browser, (also other apps like sms reading, simple text editors). OS is Android 10 at phones with touch screen.</p>

Title: How to select whole line of text?


问:
How can I make a persist property take effect without rebooting?
I am trying to switch from mtp,adb mode to mass_storage easily, preferably with a script. I can go to two different places in settings and toggle both things there. Or I can use setprop or echo to set it from the command line but that requires rebooting. As I was writing this question I thought to my self that I might be able to use settings put but I could not find a key for USB computer connection. There was a key named usb_mass_storage_enabled but that key does not appear to control the USB connection.

After reading on meta that this is apparently the proper way to do this instead of answering a comment with an unreadable comment, I have deleted my comment and moved it here.

@Irfan Latif - cat /sys/class/android_usb/android0/functions does in fact reflect the changes when I use settings to change modes but when I try the simple script of:

```<code>echo -n 0 > /sys/class/android_usb/android0/enable
echo -n 'mass_storage' > /sys/class/android_usb/android0/functions
echo -n 1 > /sys/class/android_usb/android0/enable
</code>```

Even though cat /sys/class/android_usb/android0/functions returns mass_storage the mode does not actually change.

I'm sorry I was mistaken, after further experimentation changing the /sys/class/android_usb/android0/functions file will in fact change the functionality of the usb connection. However, this change will not be reflected in the settings menu, nor will it be reflected in the usb id reported by lsusb. I did find though that should one turn off the usb with the enable file, issue command setprop persist.sys.usb.config, then turn usb back on the same way, that although it still won't be registered in the settings menu it will cause lsusb to return the correct mode id. Thanks.


问:
Enabling logcat on boot
I'm trying to debug a ROM problem, that cause Android animation boot run forever, occuring after the first reboot.

Trying to read the log with logcat ,executing from shell adb logcat -d before powering on the phone, but adb remains in < waiting for device > state

Before rebooting Android, I test adb logcat and it was working fine.

Anyone can help? How to read boot logs?

Title: Enabling logcat on boot


问:
Android *tone selection menu shows titles different to the actual filename. Why?
After i scp an audio file to my android devices alarms/notifications/ringtones sdcard folders, the file itself is named correctly, but the settings menu for selecting alarms/notifications/ringtones may or may not show a completely different name.
I have used 'sdcard refresh' tested, and then rebooted to check again every time I have copied the files.

I do not see any metadata that might contain a name.

I have converted mp3 files to ogg with ffmpeg specifically to discard any hidden metadata, yet it still happens.

caveat: I have renamed these files on the source machine, ie: PRIOR to copying them to the target device, so that I can more easily find them among the endless list of useless stock-android sounds. But somehow android is ignoring this in some cases, and not in others.

Do I need a specific tool to force the name-metadata that I want?
Do I need to clear some android database that may be clinging to the original filename and not accepting the new, despite deleting them on the device, rebooting, copying them again, and rebooting before checking again.

Android version: 9

image above:

at left:files on pc, with original names

at right: filenames after
being renamed on source machine (PC) and scp'd to the target device

image above:

delete all files on device sdcard 'Alarms' folder

power down, power up (previously i had been rebooting, but thought i should try actually powering down for a moment and then back on again - no difference)

scp renamed files to target device

power down, power up

check sound settings for Alarms

For coompleteness, or general interest: the script that converts non-ogg to ogg and copied them to the scp target:

scp-hostPath-fileList.sh

```<code>#!/bin/bash

hostpath="$1" #phoneXI:/storage/emulated/0/Ringtones/
shift
for input in "$@"; do
    [[ ! -f "$input" ]] && continue
    exportName="${input%.*}.ogg"
    [[ "$input" != "$exportName" ]] && ffmpeg-bar -i "$input" -c:a libvorbis -y "$exportName" </dev/null
    string+="\"${exportName}\" "
    msg+="${exportName##*/}\\n"
done
cmd="scp $string $hostpath"
# echo "cmd: $cmd"
error=$(eval $cmd)
[[ $? -ne 0 ]] && kdialog --title "ERROR" --passivepopup "$error" 5 || kdialog --title "OK: $hostpath" --passivepopup "$msg" 5

exit

# tests

/home/user/documents/scripts/net/scp-hostPath-fileList.sh \
phoneXI:/storage/emulated/0/Alarms/ \
/home/user/music/audio/_all-alarms-notifications-ringtones/KoganAgoraXI/Alarms/BETLOG-9000.mp3
/home/user/music/audio/_all-alarms-notifications-ringtones/KoganAgoraXI/Alarms/BETLOG-cavalryCall.mp3
/home/user/music/audio/_all-alarms-notifications-ringtones/KoganAgoraXI/Alarms/BETLOG-marioMessage.mp3
/home/user/music/audio/_all-alarms-notifications-ringtones/KoganAgoraXI/Alarms/BETLOG-marioPowerup.mp3

/home/user/documents/scripts/net/scp-hostPath-fileList.sh \
phoneXI:/storage/emulated/0/Notifications/ \
/home/user/music/audio/_all-alarms-notifications-ringtones/KoganAgoraXI/Notifications/BETLOG-carlock.mp3
/home/user/music/audio/_all-alarms-notifications-ringtones/KoganAgoraXI/Notifications/BETLOG-drip.oga
/home/user/music/audio/_all-alarms-notifications-ringtones/KoganAgoraXI/Notifications/BETLOG-wz2100-beacon.ogg

/home/user/documents/scripts/net/scp-hostPath-fileList.sh \
phoneXI:/storage/emulated/0/Ringtones/ \
/home/user/music/audio/_all-alarms-notifications-ringtones/KoganAgoraXI/Ringtones/BETLOG-bellphone.ogg \
/home/user/music/audio/_all-alarms-notifications-ringtones/KoganAgoraXI/Ringtones/BETLOG-oldphone.mp3 \
/home/user/music/audio/_all-alarms-notifications-ringtones/KoganAgoraXI/Ringtones/BETLOG-telegraph.mp3
</code>```

OwnerDisplayName: BETLOG


问:
Where are the location settings on Asus ZenFone 5?
I can't find the GPS settings on the ZenFone 5 (ZE620KL), on Android 9. I am specifically interested in the location mode, with 3 different values (high accuracy, battery saving, device only).

Asus has rolled out Android 9 to ZenFone 5. I don't have a Security & Location entry in the Settings menu. Here is what my Settings menu looks like and once in Security & lock screen:

(source: digitaltrends.com)

I can't find where to choose the location mode. All I have is an ON/OFF switch.


问:
Flash system.img file without fastboot over USB
I want to flash a different version of a system.img and normally this would be done with fastboot via USB but the device I am trying to do this to I cant use adb/fastboot over USB and I have to use adb over Ethernet instead. Once I reboot into the bootloader to try to use fastboot it obviously wont see the device since I use Ethernet so is there a way to just flash the new system.img file without fastboot?

Device has an sdcard slot, is there a way to use that?

Also note I dont have any of the other image files (boot,recovery,etc...) so I wont be able to create a zip file


问:
where is the "Keep wi-fi on during sleep" settings in Samsung s9?
My Samsung S9 phone wi-fi connection goes off when it goes to sleep mode (after a while whenever the screen turns off ).  I've found there where a setting option called "Keep wifi on during sleep" in the wi-fi settings advanced menu before the Android version 9, but I can't find such an option in my phone setting. It is very annoying nowadays during remote work from home.
any help would be appreciated.</p>


问:
Exporting a CA certificate from Android to Android?
I'm trying to install an openssl CA certificate on my Pixel 5, previously I was able to install it directly through the app I was using on my old Pixel 2 but with the new security measures this is no longer an option and I'm attempting to take this into my hands.
This is my first time trying to do this on any of my phones.

I got the CA certificate off my computer by downloading the app through an android emulator. The file was originally saved as a .dll file and I just changed the end of the file to a .pfk. I believe it is now in the correct format as it recognized by my phone.

When I go to install the ca certificate I am asked for a password to extract the certificate. I opened the file as a text document and read through it thinking I would be able to find it in there. After reading I thought the password was "callback", but that doesn't seem to work.

Is there some kind of application I can run to retrieve the password?


问:
Need help connecting a Pixel 3xl on Android 11 to a Sony ax5000
Wondering if anyone has any troubleshooting tips for my problem. I have a pixel 3 XL that is running up to date android auto and Android.

When attempting to connect my pixel 3xl to my Sony ax5000 head unit, my phone doesn't seem to recognize that it is connected to an android auto cable. I'm fairly confident everything is fine with the head unit and cable, as my wife's phone (a Samsung) and other devices are able to detect and connect to the device without problem using the same and other cables. Because nothing is ever prompted, I don't have any more ideas on how to troubleshoot this issue. Do you have any suggestions?

I went to check the default USB configuration in the developer options and confirmed it is set to File Transfer / Android Auto. Are there other settings there (or anywhere else) I should check?

Thanks!


问:
New Galaxy A10e Galaxy install gets 250mbps over WiFi then slows down to 30mbps after mainstream apps install (nothing special). Why?
I factory reset my Galaxy A10e then immediately install Ookla's Speed Test app. Over Wifi I get 100 to 200mbps on repeated tests.  After installing basic mainstream apps like Spotify, Pandora, etc and updating Google's and the Samsung phone's preinstalled apps the Ookla Speed Tests give me a maximum speed of approx 30mpbs.  I have to factory reset my phone and not install apps to keep the higher speed.  What gives?</p>


问:
Remove notifications sound (add "silent notifications" setting on Android)
I have a Pixel 3a with Android 11 installed on it.

I have a lot of notifications, like SMS, Viber, WhatsApp, Facebook, etc... all beeping all the day. I would like to remove just the sound of all these notifications, letting them vibrate, flash... whatever other things it does...

However, the calls should not be muted, I would like to have normal sound when someone calls me (via normal call, or via WhatsApp, Messanger, Viber, etc).

I can't believe at this day is not possible a thing like this on Android 11...

The idea is not to manage all the possible applications individually, but to mute all NON-call sounds in general on the phone, except "long calls" (phone and messengers calls, wake-up alarms, all calls that are waiting the user to 'finish' them).

I suppose there should be a more standard solution than this tricky one. I think there should be a setting like SilentNotifications On/Off, if such thing is not present, it should be (Google tracker issue created)


问:
Messages for web not updating with new texts and statuses
I am trying to use Android Messages for web. I am able to connect to the phone using the QR code, but after the initial connection, I do not get new messages automatically or any notification – I have to reload the page to see them.

When I send the message, the “Sending…” status remains and is not updated to “Distributed” either.

I have tried in Firefox and Chromium. I am using Ubuntu. The computer and phone are on the same network, and I tried with the computer using a cable or WiFi. The phone is a Samsung Galaxy S9 and the app is allowed to run in background (no battery optimisation).

I have also tried on Windows with Chrome on the same computer, and I have the issue as well. I would thus assume it comes from either the phone or the network.

I have had the problem for quite some time now, I couldn't say if it used to work in the past.


问:
Is there a one click way to make a kindle fire a pure Android device?
For non-technical users, is a one click way to get rid of the amazon stuff & install stock Android?

I am trying to help a friend on another continent who has a kindle fire 7 running OS v 5.6.8 (auto-updated just a few days ago, which looks like it might be a problem).

Solutions seem to involve downloading scripts to a PC, then using Android Studio to side-load the scripts to the kindle, then running them, which would beyond my friend, even with assistance - even if they had a PC, which they do not (nor access to one), just the kindle fire.

Does anyone know of a one-click solution, or something close to it, involving only the kindle fire (7 OS 5.6.8)?


问:
Android Car Unit - Touchscreen not working after ignition off and reboot
I have an Android 9 radio from Klyde (CSN2_D, PX5, Rockchip rk3368). There is a power-saving feature that cuts most of power consumption after 30 sec. when ignition is off (do you call this deep sleep?). Technically yellow main power cable stays connected, red ignition power cable is cut. When I start the car the unit reboots.

My problem: Touchscreen does not work after boot. This happens only with this mode. Forcing reboot from the unit or from stock recovery or rebooting after all power cables were cut works fine. Same problem when unit is removed from the car, so it is not a wiring issue.

The problem occurrs since I tried a different launcher and removed it. It looks like this launcher changed some settings which remained permanently saved, because FM radio stations that were stored at that moment are permanently stored in the unit as well.

I tried a lot:

Firmware update Android 9

Upgrade to Android 10

MCU update with different versions

Factory and cache reset

Complete new installation with Rockchips' AndroidTool after forcing unit in Maskrom mode

Erase flash with AndroidTool and new installation

I saved dmesg.log-files and here is the difference:

Working:

```<code>[    0.907815] of_get_named_gpiod_flags: parsed 'touch-gpio' property of node '/i2c@ff140000/gt9xx_main@14[0]' - status (0)
[    0.907841] of_get_named_gpiod_flags: parsed 'reset-gpio' property of node '/i2c@ff140000/gt9xx_main@14[0]' - status (0)
[    1.004583] Goodix-TS 2-0014: GTP X_MAX: 1024, Y_MAX: 600, TRIGGER: 0x01
[    1.016532] GTP Sensor_ID: 0
[    1.016554] ## GTP: 1024x600 customer touch type: -1 ; customer type1125 index: -1
[    1.016792] input: goodix-ts as /devices/platform/ff140000.i2c/i2c-2/2-0014/input/input1
</code>```

No touchscreen:

```<code>[    0.909817] of_get_named_gpiod_flags: parsed 'touch-gpio' property of node '/i2c@ff140000/gt9xx_main@14[0]' - status (0)
[    0.909843] of_get_named_gpiod_flags: parsed 'reset-gpio' property of node '/i2c@ff140000/gt9xx_main@14[0]' - status (0)
[    0.995911] <<-GTP-ERROR->> I2C Read: 0x8140, 6 bytes failed, errcode: -6! Process reset.
[    1.071450] <<-GTP-ERROR->> GTP read version failed
[    1.123893] <<-GTP-ERROR->> I2C Read: 0x8140, 6 bytes failed, errcode: -6! Process reset.
[    1.168453] usb 2-1: new high-speed USB device number 2 using ehci-platform
[    1.199449] <<-GTP-ERROR->> GTP read version failed
[    1.199471] <<-GTP-ERROR->> Read version failed.
</code>```

dmesg.log (crashed)

dmesg.log (working)

Any ideas what happened and how I can solve the problem?


问:
Changing Wear OS AVD build properties
I'm trying to get hold of one specific app: LV Watch Faces 2. I cannot find this anywhere. It's possible to extract it from an LV Wear OS watch, but I don't have them. I got an idea, maybe it's possible to change the device name/model on the Wear OS emulator for an app to appear on the emulator's Google Play Store.

I tried changing build.prop that's located in C:\Users\user\AppData\Local\Android\Sdk\system-images\android-28\android-wear\x86, but it seems like it didn't work (it shows the same default name sdk_gwear_x86)in the Settings)

Could anyone help with changing Wear OS's AVD build properties or generally suggest - does this idea make sense (changing those properties for having hardware limited store apps to appear).

Title: Changing Wear OS AVD build properties


问:
How to tell which partitions to backup in recovery (TWRP)?
I have TWRP as my recovery on a Galaxy phone. There are so many options to choose which partitions to backup. What do they all do? My goal is to be able to recover from the largest number of disasters. However I think restoring some partitions can lead to a boot loop, because this recently happened to me.</p>


问:
How can i get back my files from userdata dump (dumepd via LGUP)?
A while ago i soft bricked my LG V30, then before i flashed a new Rom i created a LGUP dump which gave me lots of files includung a 54 GB userdata file.
The phone is currently up and running with the new Rom after a factory reset, the thing i am after are my Files that are in the Userdata dump.

What i have tried/googled:

I have mounted the system Partition as EXT4 under Ubuntu which has worked perfectly fine, but when i try this with the userdata it doesnt work.

I have read that it is possible to (somehow) create a flashable KDZ or TOT file that apparently can be put back on the phone. I had no luck finding a tool or any instructions on how to do this.

I have heard that you can push a partition to the Phone via ADB. This went similar to #2 as i wasnt able to find any instructions or something like that on google.

Also i have tried to mount the userdata file on my phone through the ADB shell, but this wasnt successful because the shell doesnt have root permissions.

I also have tried the partition dl feature in LGUP with the phone in Download mode but UP gives me an error that the file isnt in a KDZ or TOT format.

Can anyone help? I am desperately trying to get my files back.
Does anyone know why the mount under Linux doesnt work? This would be the easyest way to get the files.


问:
Android - Simulate display with cutout
The new 'Simulate display with cutout' feature is very useful for android development for making sure an app will work on all devices, however there are some types of cutouts I would like to try for which I am not given the option.

Does anyone know how to add new cutout presets for this feature?

Title: Android - Simulate display with cutout


问:
Looking for a pseudo-random shuffled classic Android Klondike solitaire game
Hypothesis: Most classic Android Klondike solitaire apps are "rigged" to allow the player to win more often than they would if they were playing from a pseudo-random shuffled deck.

Opinion: This is done to maintain interest in the particular app; vis-à-vis, the possible frustration of frequently losing.

Request: Can anyone recommend a classic Android Klondike solitaire app such that the shuffle is pseudo-random?

Thanks!

Joe


问:
Is it possible to recover the digit prompts given a phone number?
Let's say I call a number and enter a certain sequence of digits in response to the machine prompts. Is it possible to recover that sequence as part of the call history?</p>


问:
Is there a window zoom shortcut on android 10 without using physical buttons?
On android 9 I was able to utilize the "window zoom" vision accessibility feature by triple tapping on the home button to bring it up. On android 10 I cannot find that option. The only shortcut I can find for accessibility settings is to press the volume up and power button at the same time. Is there any way to get window zoom by tapping virtual buttons on android 10?

To clarify, there is a zoom feature that magnifies the whole screen by triple tapping anywhere on the screen, but I do not like this feature as it causes apps with virtual buttons like calculators to become laggy and less responsive. I specifically want the "window zoom" feature for when I play a game with text that is too small at times and I would like to activate it in-game without using the volume and power buttons.

Edit: My phone is an LG G7 thinQ