问:
How to dim any ongoing music when receive notification?
How to dim any ongoing music sound by certain percentage (let's say 20%) when I receive message instead of pausing the current ongoing music and play the notification sound and continue play the ongoing music?</p>


问:
Remove badge (notification count) on home application icons
How is it possible to disable the "unread notifications count" on app icons, like the Facebook icon here?

I have an Android 5.0.2 (not rooted) on a Samsung A3 2015.

PS: I have already done this: hold Facebook icon during 2 seconds, swipe to "App  Info", then uncheck the checkbox "Show notifications", but it did not change anything about the notification count on the icon itself.

ContentLicense: CC BY-SA 3.0


问:
Are SD card file systems cached somewhere?
After removing the SD card from the phone, is the file system tree still stored somewhere accessible? I previously used ES  File Explorer to view the contents.
In case it is phone specific, Samsung Galaxy S7 edge running Nougat.</p>


问:
failed to mount /modem (invalid argument)
I have galaxy note 4 with stock rom (Samsung's official ROM) and about two weeks ago it started to crush and then reboot every few minuets. In addition, the phone was very slow.

I tried everithing I could do without root, even Factory data reset, but the phone countinued to act the same so I decided to root it and install a cutom ROM. I installed twrp, I rooted the phone, wiped the phone and intalled the ROM (unofficial LineageOS ROM). After the twrp installed the ROM, I started it for first time and the ROM didn't loaded, it just continue to show the ROM's loading screen until the battary over (about 8 hours). I tried to flash the ROM again and I suddently noticed that every action I made with twrp (formating and flashing the new ROM) printed me an error:

```<code>Failed to mount /modem (invalid argument).
</code>```

The error also happend in cwm recovery. I need your help. I have no idea whats coruppted in my devices and why this error occurred.


问:
Unable to make calls after clean flash, mobile data working [LineageOS 14.1, Galaxy S7 SM-G930FD]
I just flashed the latest stable official Lineage ROM for S7 Duos (SM-G930FD), using the following process

1.Boot to TWRP recovery

2.Wipe everything except external SD (contains zips)

3. Add following to zip queue, flash, reboot.

lineage-14.1-20180419-nightly-herolte-signed.zip

open_gapps-arm64-7.1-micro-20180422

Magisk-v16.0.

4. Everything is working as expected, EXCEPT I'm unable to make/receive calls or send SMS.

The SIM is being detected with correct network, I can receive SMS and LTE data is working so it looks to be a software/config issue but I'm out of ideas, so would appreciate any pointers on what to check.


问:
How to get Android 7.1 on Moto G5?
As (partially) mentioned here, I've been using Moto G4 prior to purchasing Moto G5. On Moto G4 I went from Android 6.0 through 7.0 to 7.1.

I assume that Moto G5 is a successor (next generation) of Moto G4. Correct me, if I'm wrong. If so, then why am I still on Android 7.0 or how to trigger immediate update to 7.1 or 8.0?

I assumed that having newer phone = newer or at least the same system version. I'd never expect newer phone having older system version than its one year older predecessor. What am I missing?

Title: How to get Android 7.1 on Moto G5?


问:
Galaxy S9: How to backup everything? (Samsung Cloud or Google Backup)
I have a new Galaxy S9 (first Android phone in my life) and the options on Settings to configure the backup is confusing.

I don't know what to choose, Samsung Cloud or Google Backup, both seems to backup the same thing, or not?.

I did a test, I used both (Samsung first, then Google) to do a backup and I restored the phone from these backups and I never got anything restore.

Samsung Cloud or Google Bakcup? what are the differences? Is very
important to me to backup the Apps I have installed, the "Settings"
configuration and the layout of my screen, ringtones, wallpaper, well, a backup of
everything. (as an Iphone does)

How and where to configure to do a daily backup automatically?

How and where to enable Find my phone?


问:
Google Play store detecting installed apps
I wanted to know how Google Play app detects already installed apps so i ran a test. First, I installed an app from Google Play and extracted it's APK file. Then i started decompiling the app using ApkStudio and modified some strings. Then i did rebuilding and signing. At last, I installed the newly created APK and opened Google Play, searching app name it said that it's installed although the newly created APK file had a different hash.

Before doing this test, i thought that Google Play checks installed apps by comparing hashes of APK file but now i think it only checks by package name. Is there any reason why the checking isn't performed using hashes? I know that using hash instead of package name introduces storage overhead (as an extra hash string must be saved for every version of an app) but by doing so, one can easily find that an APK file is a modified version of another app, it's important as modified apps are malicious generally.


问:
Quickly turn screen lock off and on on Android 7
Often there are situations where I access my phone frequently (every few minutes) and I don't need the screen lock. Always going to settings → security → screen lock to change the settings is very annyoing, so I'm looking for an easy option to quickly turn the screen lock on and off or change between the screen lock options (none/swipe/pattern, PIN, password).

Ideal would be an icon in the status bar like the WiFi on/off.
Is this possible on Android 7 (I'm using Lineage OS).

Unlocking via fingerprint is not an option.


问:
Why does Android have a call log limit for the call history?
I just noticed recently that Android limits the call log to 500 entries.
I would like to know for what reason one would limit the call history.
Now many people including me have lost their call history.</p>


问:
Can I use 6LoWPAN to tether BLE devices with Android?
I have a Nexus 5X (running stock firmware) which supports Bluetooth 4.2.  How do I use 6LoWPAN to share the internet from my phone with BLE devices?

Is it as simple as enabling Bluetooth tethering in settings?


问:
Huawei Unlock code site not working - How to get Honor 6X unlock code?
All is in the title : How to get Honor 6x unlock code since this url 'https://emui.huawei.com/en/plugin/unlock/index' is dead ?</p>

ContentLicense: CC BY-SA 4.0


问:
Is there a Towelroot alternative for anoriginal Shield Tablet?
Yes, I am aware that my tablet is old af

Is there a towelroot alternative? I am on the newest Shield ROM version and towelroot doesn't seem to work. It gives an error code (will enter later). I need something like this because (oof) I do not have access to a computer that I can install adb on. If at all possible, I would prefer not to lose my stuff... thanks!


问:
Possible to Obtain Active Bluetooth Connection Details? Protocol version? Profile? Codec?
Is it possible to obtain details about an active bluetooth connection in Android?

Protocol version is what I most want to know, such as if a bluetooth 5.0 peripheral is connecting to the device using bluetooth 5 and not 4. Also would be great to see the profile/codec being used as well.

I've looked and somewhat to my surprise I didn't find a way to do this either natively in android or using any third party apps.


问:
Can't access Gmail Inbox trough Sqlite3, mailstore.email@gmail.db doesn't exist Android nougat
I used this to get all emails on inbox (on android shell or through tasker running a shell command):

```<code> sqlite3 /data/data/com.google.android.gm/databases/mailstore.YOUREMAIL@gmail.com.db "SELECT fromAddress || '@|@' || dateSentMs || '@|@' || Subject || '@|@' || snippet FROM messages m LEFT JOIN message_labels ml ON m.messageId = ml.message_messageId JOIN labels l ON l._id = ml.labels_id WHERE l.name = '^i' ORDER BY m.dateReceivedMs DESC;"
</code>```

However, since I changed to a new device with android 7 (first emui 5.1 and then LineageOS 14.1), it doesn't work. Analyzing Gmail database with Sq lite dB reader, I found out that mailstore.YOUREMAIL@gmail.com.db file doesn't exist anymore. I checked the available db files but non of them seem to contain inbox info...

Does anybody now how to get inbox now?

Regards,


问:
How to turn off automatic android emojis?
When I type in :-) or <3 into my messages app on my galaxy s8, it changes the text into these dumb green android emoticons. How do I turn this off so that it displays the actual '<3', ':-)', etc instead of these dumb green android emoji's??


问:
App to download rss enclosures (just like a podcatcher)
Is there an Android app that is able to download rss enclosures? I want to setup calibre on a server to download articles from some newspaper-sites and converts them to .epub.

Then I want to have an RSS-feed of those epub-files.

Finally I want my Sony PRS-T1 to download all (new) epub-files that are linked in this rss feed.

How would you do that?


问:
Is there a "Reading mode"?
In Andoid 5, when doing nothing, after a few seconds (10 seconds?), the light dims, and after 30 seconds, the screen goes off. (This can be changed in Settings > Display and wallpaper > Screen timeout).

This is generally good, but when reading something on internet, it's annoying, because the screen goes off all the time, forcing to tap the screen often to keep it on.

Question: is there an option, easily switchable on/off (for example in the top panel with Wi-Fi, Location, Mute, Screen rotation icons, etc.?) to prevent the screen timeout?

Note: I've seen a "Smart stay" feature ("screen stays on as long as you are looking at it") but this works by "detecting your face with the front camera so that ...".
For both battery and personal reasons, I don't want the camera to be constantly on (watching me ;)) while I'm reading, so I don't want to use "Smart stay" feature.

Note: this question is linked, but it targets Android 2, and is rather old (7 years old), so things might have changed thanks to new Android versions.

Title: Is there a "Reading mode"?


问:
What kind of information can an Android app from the Play Store with zero permissions enabled gather about me and my phone?

Find an app in the Google Play store

Click on Install

App is installed without any permissions granted, except for the default settings (SDK >= 23)

Run the app without giving any extra runtime permissions

Now, what can the app know about me and my phone?

Severe exploits aside, can an invasive app use tricks to bypass limitations? Like web trackers adapted to use canvas fingerprinting and localstorage.

In Android 6.0 Marshmallow, applications will not be granted any permission at installation time. Instead, application has to ask user for a permission one-by-one at runtime.


问:
When was KNOX efuse introduced?
I realy want to root my samsung j7 (2016) phone and flash custom roms on it.
I know it has knox but i am not sure is it the one that can be reversed by triangle away app or it is efuse that can not go back.

Can somone tell me what was the first phone with KNOX efuse or when samsung introduced efuse. Also if you are not sure about answer you are giving please tell that.

Title: When was KNOX efuse introduced?


问:
Samsung Galaxy Note 3 SM7505 won't connect to laptop via USB
I am using Note 3 but I'm unable to connect my phone to PC or laptop. MTP or USB bar option did not pop up when I connected my phone. Please help.</p>


问:
second language disappears after restart
I have a q about my android phone. every time I turn off or restart my phone (Samsung Note 3) my second language for typing disappears and I have to download the second language from the list on keyboard again. do you have any solution for that?</p>


问:
How to block a particular website?
When i switch on my Wifi Hotspot to share my data with my son, he spends so much time in a particular website. How do I block that website in my cellphone so he will not be able to access that website?</p>

Title: How to block a particular website?


问:
Need a media subdirectory inside a nomedia folder
As the title says, I have been searching for a way to show pictures from a nomedia folder subdirectory...the files have to be in that directory and can't be moved.

My messaging app stores it's background images  from themes into it's own directory. I have that directory hidden with .nomedia. However, it also stores any downloaded pictures into a media subdirectory and doesn't have the option to change that. I need the downloads to show in the gallery but not all the themes, if there's any way to do this


问:
Can't remove Phone permission to app
I'm trying to remove the Phone permission from this app (Pango פנגו) - but it just doesn't work!

I deny it, and it just comes back:

What I tried:

Clearing data of the app

Re-installing

Disable all permissions (still phone comes back)

Any idea? It's so weird.

Details: LG G5, stock, no root, Android 7.0

Title: Can't remove Phone permission to app


问:
Is there some documentation on which character sets are definitely supported by Android version?
There is a lot of vague information such as "Android supports RTL since 4.1.1", from which I abduce that Android natively supports (some) Arabic, Hebrew, Persian and Urdu characters. Likewise some question on Stack Overflow such as What glyphs or character sets are included in Roboto fonts?, which is not definitely answered.

There are many scripts which are obscure by Silicon Valley standard but used by millions of people, such as Syriac or Amharic. I have noticed that new versions of Android display Syriac (since Oreo?), and further back (JellyBean?) support Amharic.

But I find it very difficult to just find a plain list of supported alphabets per Android version. Is it different per manufacturer, or does Google require every Android distribution to support at least a certain character set?

If I download an app with Amharic translations targeting API versions > JellyBean (for instance) should the developer include a font in the APK to be sure that I won't see tofus?


问:
Why does Google intentionally disable features in most countries?
Why does Google intentionally disable features in most countries? Prime example being, Google Pay for Wear OS.

Background: Google Pay actually works just fine in most countries as far as I can tell, but with the Oreo update the app is constantly being disabled. If you enable it, it still continues to function as per normal.

Question: What benefits do Google get for locking this down in countries other than their selected handful?


问:
How To Transmit (text/tweet) Temperature and Humidity Data From a Samsung S4
I'd like to be able to use my Samsung S4 as a wireless temperature/humidity for a climate controlled storage unit.  Does anyone know of a way to have that data texted/tweeted from the phone?</p>


问:
Where can I find ROM images for Samsung Galaxy Tab 2 10.1 (GT P5113)?
I've stopped using my tablet several years ago out of frustration. Ever since Kit Kat/4.4.4 everything has slowed to a near unusable crawl. I tried rectifying this by flashing it with a SlimRoms OS (SlimKat) but it only improves things moderately and some applications, like YouTube, crash often.

I'm looking to see if maybe Jelly Bean runs better, but so far I've had no luck with it. The Samsung downgraded firmware just puts it into a boot loop and I cannot find a compatible SlimRom, Lineage OS, or Cyanogenmod. Does anyone know if one exists?


问:
Mi Max 2 Xiaomi apps as default immutable setting
I'm using a Xiaomi Mi Max 2 phone.
At the last time I was able to open links with a browser of my choice. But now, the "browser" only is imposed. Additionally, there is a lot of Xiaomi tools and apps that appeared, as App Vault, shortcuts and calendar from Xiaomi that take the control of my phone.
How can I get there out?</p>


问:
Signal Problem of S8+
I recently bought a Samsung S8+. The phone is alright but I got stuck in a problem. One of the network provider SIM is not working. As a simulation, I used following steps:

I exchange the slots, other sim was working fine on that slot.

I bought another sim of the same network provider and tested in both slots, still no service.

I moved to a region out of my university, that was working fine, as soon as I entered back, then again no service.

I put the same network provider sim in other phone at exactly the same location where s8+ was giving zero signals, the sim was providing full signal, hence it came out that the problem of signal jam was out of concern.

I restarted, factory reset the phone, but still the problem persists.

P.S I recently bought and in two days, I noticed the problem.
I got stuck in this complicated situation. Help me out, I will be grateful.
Thanks.

Title: Signal Problem of S8+


问:
Unable to change default launcher
I have Lenovo k5 smartphone with Lollipop 5.1.1.

As stock "Lenovo Launcher" sucks, I installed Nova Launcher and set it as default.

Unfortunatelly, after each restart (or even without restart, after few hours) the default launcher changes to stock "Lenovo launcher".

Is that a way to permanent change?

Title: Unable to change default launcher


问:
Disable Google Apps in MIUI 9 and MIUI 9.5
My friend has two Mi phones Redmi Note4 and Mi Max2.

And recently I updated both; Redmi Note 4 to MIUI 9 and Mi Max2 to MIUI 9.5.

To disable Google Apps like Chrome, Play Music, Play Movies & TV, etc in both I gone through the link. The steps explained the link is for MIUI 8.0. That's why Google Apps couldn't be disabled.

Please let me know how to disable Google Apps in MIUI 9 and MIUI 9.5?

With Regards
TekQ


问:
Is there an API for google's Find My Device, specifically the ringer?
My mom loses her phone constantly, and it's a pain to log out of my password manager, log into hers, log into her google account, and ring the phone with Find My Device. Is there an API somewhere so I can do this automatically?</p>


问:
Android data disappeared
I got an Android Tablet (Samsung SM-T800). I recently went into Download Mode (holding down some keys during startup), just to check if options for factory reset are available. I canceled out of Download Mode and booted up normal. Now all my photos and documents are gone. Only 2 of over 100 pics are still there. All the apps and settings are still there. I didn't do a factory reset, so I don't understand why my photos are gone. If I plug the tablet into my PC, the space that was once used by the photos is still occupied. I guess, they are still there, but for some reason they are invisible. I tried some data recovery apps from the Google Play Store to no avail. The data is stored on the internal SD card. Can anybody tell me, how I could get my data back?</p>

Title: Android data disappeared


问:
Does Samsung profile sharing work on other Android devices?
The Contacts app on Samsung Android phones has a feature called profile sharing. If you enable it, it lets you share your name, phone number and profile picture with all your contacts. Your contacts will now be able to see your profile picture in their Contacts app, presumably, similarly to WhatsApp or Signal.

Does this feature in Samsung Contacts app work on other phones? Is there a way to get it to work on other phones? Do other brands have similar functionality?


问:
Cannot connect to Wifi iptables error
Lately my Google Pixel 2 will not connect to my Homewifi.
It tries to connect all the time. Looking into the Log I get an iptables error:</p>

```<code>05-06 10:03:56.253 1120-1355/? D/RecurrenceRule: Resolving using anchor 2018-05-06T10:03:56.252+02:00[Europe/Berlin]
05-06 10:03:56.255 1120-1355/? D/RecurrenceRule: Cycle 15 from 2018-04-13T00:00+02:00[Europe/Berlin] to 2018-05-13T00:00+02:00[Europe/Berlin]
05-06 10:03:56.256 689-3393/? W/IptablesRestoreController: iptables-restore process 25082 terminated status=256
05-06 10:03:56.256 689-3393/? E/IptablesRestoreController: iptables error:
    ------- COMMAND -------
    *mangle
    -D wakeupctrl_mangle_INPUT -i wlan0 -j NFLOG --nflog-prefix iface:wlan0 --nflog-group 3 --nflog-threshold 8 -m mark --mark 0x80000000/0x80000000 -m limit --limit 10/s
    COMMIT

    -------  ERROR -------
    ip6tables-restore: line 2 failed
    ----------------------
05-06 10:03:56.256 1120-1355/? D/NetworkStats: Resolving plan for NetworkTemplate: matchRule=MOBILE_ALL, subscriberId=262073..., matchSubscriberIds=[262073...]
05-06 10:03:56.256 689-3393/? E/WakeupController: Status[code: -1, msg: "Failed to execute iptables cmd: *mangle
    -D wakeupctrl_mangle_INPUT -i wlan0 -j NFLOG --nflog-prefix iface:wlan0 --nflog-group 3 --nflog-threshold 8 -m mark --mark 0x80000000/0x80000000 -m limit --limit 10/s
    COMMIT
    , out: "]
05-06 10:03:56.256 1120-1376/? E/ConnectivityService: Exception modifying wakeup packet monitoring: android.os.ServiceSpecificException: Failed to execute iptables cmd: *mangle
    -D wakeupctrl_mangle_INPUT -i wlan0 -j NFLOG --nflog-prefix iface:wlan0 --nflog-group 3 --nflog-threshold 8 -m mark --mark 0x80000000/0x80000000 -m limit --limit 10/s
    COMMIT
    , out:  (code -1)
</code>```

Title: Cannot connect to Wifi iptables error


问:
Termux android usage for linux based work on the go
Any tutorial to lear termux commands???
for termux-ubuntu package, to perform allmost all the linux based work on android.</p>


问:
How does open.spotify to detect mobile browser
If you log in at https://open.spotify.com with your mobile you will be redirect to https://www.spotify.com and if you click on the button "launch web player" you will be redirect too. It's impossible to get the access of this page with a mobile. I tried to change my user agent but it doesn't work.

Do you know if it's possible to by pass this redirect ?


问:
Disable screen turn-off from proximity sensor during phone call on Android 7.1
This question has been asked before but the answers do not apply to the current android version (e.g. here is an answer for 2.3 and here is a question marked duplicate for that answer; I also tried the solutions here and here).

I can't seem to find an answer to this question. Is it even possible? Most searches turn back results of people who have an issue with their sensor or whose screens don't come back on (mine does), but I want to flat out stop this from happening (it was nice before bluetooth, but now I get a random black screen in the middle of calls whenever I try to look for something).


问:
Where can I learn about LineageOS file hierarchy?
I would like to learn more about LineageOS.

I am looking for information that describes data in /data/ folder.

Especially I am interested in the purpose of the following folders: user_de, user, tombstones, system_de, system_ce, system, property, misc_de, misc_ce, misc, data, bcmnfc and app.

Thank you very much for any helpful information!


问:
Sony Xperia X on Nougat, Cell Information app won't stay off
I recently bought an Xperia X to replace an older sony phone I had.   After getting it set up, there is an application called "Cell Information" that constantly shows in my notification bar.  the only way I can find to turn it off is to go into the application and force quit it, and this works till the next time I restart the device.

In the application settings I can't find any way to disable notifications or turn it off permanently.  This is not a huge issue, just an annoyance.

Does anyone know how to permanently stop this application from showing in the notification bar?


问:
Cannot uninstall Kinguser
So when I installed Kinguser,it was a old version like 2 years ago ver,and there is no root uninstall/uninstaller.
It also doesn't allow me to connect to my wifi for some reason,and I can't remove it using android,can only disable it.
How can I get rid of it??Is there any way?</p>

Title: Cannot uninstall Kinguser


问:
How many computers can I connect simultaneously using Android tethering?
Yesterday I tried to connect 5 computers with my Android smartphone to the internet, however, I could only connect two of them simultaneously, is this the theorical limitation or there is any configuration to be done to increase this number? Is this a limitation of my smartphone's wifi card?

PS: Android 2.2 @ Samsung Galaxy 551


问:
DroidExplorer won't open after a few runs
I have faced this issue over three times now.

I reinstall Windows, use Droid Explorer a couple of times and after about 10 uses, Droid Explorer stops working.

So the issue is Droid Explorer crashes after trying to connect to the device.
This the last message I see:

After that it just closes, nothing happens.

Here's the log:
https://pastebin.com/fULc333k
(Sorry, but if I post the log here it's causing some formatting issues.)

Today afternoon, I reinstalled Windows 10 x64 Build 17134.1 (that's the April 2018 update), installed Droid Explorer, used it about 5 times.
Stopped working after that.

Can someone please help me out?


问:
How to bypass only position independent executables (pie) are supported on android N?
How can I bypass

only position independent executables (pie) are supported

on android N(lineageos 14.1,vega Iron)?
This xda thread made me infinite rebooting. Also I cannot rebuild the app.. Please help!


问:
Google Play app link links to the Play homepage instead of the app detail page
I have a link on my website leading directly to a specific Google Play application:

```<code>Go to the app
</code>```

The link is based on the official Android docs.

The link opens the Google Play app and goes to my app as planned. But on some devices, the user lands on the Google Play homepage instead of the detail app page. The "some devices" run Android 7 and have Google Play (v9.8+) installed.

What might be wrong? Is it some kind of a setting that prevents accessing the app "deep link"?

It's quite frustrating especially that it works for other devices, e.g. Nexus 5 with Android 6 on it. I don't see a pattern. Does anyone have an idea?

Body:
I have a link on my website leading directly to a specific Google Play application:

```<code><a href="https://play.google.com/store/apps/details?id=en.my.app" target="_blank">Go to the app</a>
</code>```

The link is based on the official Android docs.

The link opens the Google Play app and goes to my app as planned. But on some devices, the user lands on the Google Play homepage instead of the detail app page. The "some devices" run Android 7 and have Google Play (v9.8+) installed.

What might be wrong? Is it some kind of a setting that prevents accessing the app "deep link"?

It's quite frustrating especially that it works for other devices, e.g. Nexus 5 with Android 6 on it. I don't see a pattern. Does anyone have an idea?


问:
How to run TWRP recovery headless?
I have samsung s5 having damaged screen. Its screen is blank and touch is not working. I have checked USB debugging by connecting to tv via hdmi to enable adb and flashed  twrp ecovery twrp-3.2.1-0-k3gxx.img.tar from here via odin.
It installed successfully as blank TWRP folder is created. But I am unable to access recovery using adb as mentioned in this guide. It shows no device in  adb devices.

How can I enable adb in twrp recovery if it is not enabled by editing twrp settings file or some other way.

Title: How to run TWRP recovery headless?


问:
Allow mock location for non-onwer user
Is there a way to enable mock location on a non-owner user?  I have a test user account on my Android device to test a line of business app and need to be able to test location awareness without actually having to be at each of the locations.

Any ideas would be greatly appreciated!  Thanks!

Title: Allow mock location for non-onwer user


问:
Disable programmatic volume control
How do I disable volume control by apps? Apps like skype, webex, etc.
Basically I want that volume can only be adjustable by physical buttons and may be from system settings, but not from/by apps.</p>

Title: Disable programmatic volume control


问:
Permanently mute media (non-bluetooth) volume or control (with app?) media volume while connected to bluetooth
Phone: Galaxy S8

Problem: I use Bluetooth headphones all the time, I adjust volume with them or on the phone, but once I disconnect the media volume on the phone is no longer muted (or at low volume) like it was before the adjustment while using Bluetooth. It appears as if Bluetooth volume changes the non-Bluetooth media volume (but strangely doesn't seem to be the same level as the previously-connected Bluetooth; some high level)

This is a problem because sometimes I either forget to enable Bluetooth, or Bluetooth disconnects while I walk away from the phone, and I'm in a place (like work) where it's generally quiet with people around.  Then suddenly and embarrassingly it blasts my music for all to hear.  This wouldn't be a problem if the phone media volume would just stay down/muted!

I would think the possible solutions are:
1) Create some 'permanent' mute of the phone media volume
2) Some app that allows me to control Bluetooth and phone media volume independently.
But I haven't found solutions to either.
Any ideas?

(I should note this has NOTHING to do with 'media sync' or having the blue tooth headset volume and media volume both control the same volume. I currently have this disabled.)


问:
Whatsapp (Android) makes some pictures blank and appear black while sending on LG G3
Steps:

Capture some pictures, say 10 pictures
-- I am able to see all images in the Gallery

Attach all of them in whatsapp
-- I am able to see all images in the preview

Send
-- Some pictures turn black (actually they are empty; I checked the size)

To the receiver also, same observation, that is some are black and some are alright.

What is the problem and how to fix it ?


问:
Always alert on a specific app's notifications?
My problem:

I want to purchase event tickets that go on sale at a time not predisclosed. They're announced via Twitter and effectively sold out within 60-90 seconds. I only follow the handle that posts this announcement and receive no other notifications from Twitter.

My question:

Is it possible to make an arbitrary app (or even just Twitter) play a notification sound even when my phone is silenced?  Alternatives, such as elevating all of its notifications to emergencies or similar solutions would suffice as well.


问:
How to Factory Reset Device using Adb Command?
I am trying to do Factory Reset Device without any Recovery as i need to wipe complete data from device. I have tried many Commands but none of them work. Some are as Follows:-

```<code>adb shell am broadcast -a android.intent.action.MASTER_CLEAR
</code>```

This command works with phone contains api level less than 22 but not on Upper Api level Devices.

I also tried --wipe_data command but it says Command not found.

Can anyone tell me how can i Factory Reset Data without Recovery Device.

Thanks


问:
Can I use ADB with USB Network Gate?
I have a colleague who cannot obtain the kind of Android device we need for our project. He would like to own such a device to test our project with adb and similar tools, but to reiterate, his obtainment of this physical Android device is not possible. So the only solution we could think of is to have him remotely access my device from his computer.

USB Network Gate is an application that facilitates this kind of functionality. I decided to try it out on my LAN to see if it could solve the problem. Unfortunately, adb is having some issues.

In my setup, both desktop machines are running macOS 10.13.4. I am able to share my Android device on a given port and I can even connect to that device just fine from the remote host in my LAN. However, when I try to use adb I see that it says the device is offline:

```<code>$ adb devices
List of devices attached
* daemon not running; starting now at tcp:5037
* daemon started successfully
69c98243    offline
</code>```

Any adb command that I try to run also complains that the device is offline. Moreover, the usual prompts on the phone about whether to trust the computer and the "Connect to PC" options do not come up. I assume that USB Network Gate is somehow upsetting adb, but I do not know why.

It is very strange since the rest of the host's system shows that the USB device is connected. So I know that the phone is connected to the remote host, but adb does not like the connection for some reason. How can I fix this problem so that I can use adb on a device connected via USB Network Gate?

Title: Can I use ADB with USB Network Gate?


问:
Writable System Revets to RO
I rooted with TWRP 3.2.1-0, installed SuperSU zip (later automatically updated) and added Busybox. I presently have three backups plus one of the EFS directory alone. The older one is some three weeks old. Since then I fight with this problem. Probably, I have done something wrong, but I can’t figure out what.

The problem is that I don’t really have root access, even if any type of root checker says that I do. Files on ES Explorer read rw each time I restore any of those backups, as I can see, but a couple of minutes later the CHMOD strangely changes by itself to what it is when a phone is not rooted, and writing permissions are gone. Chang CHMOD with a file manager has the same result, but showing dwrx. If I reboot I have drw everywhere, but no effect on root access as in any case, and in less than 2 minutes all root directories revert to their original permissions, except the /system directory, maintaining now drwxrwxr-x. This is very confusing and difficult to describe, but something is sure: the permissions change by themselves and I never have root access. However I had it before the first TWRP backup because I could install an application on /system.
I know little about adb commands, but I have used those that I found on other threads on this forum and elsewhere, and get some answers like adbd cannot run as root in production builds for adb root. I also tried the following command on both the TWRP terminal and a terminal emulator app, also both under u0227@jflte:/ and after entering SU:
mount -o rw,remount /system

Result under u0227@jflte:/      Mount: Permission denied

after entering SU here tmp-mksh: Mount: not found

Command   /system/bin/mount -o remount,rw /system /system

Result:     Permission denied

More commands that I ran on adb on computer

adb devices

Result:
List of devices attached
* daemon not running. starting it now on port 5037 *
* daemon started successfully *
4daf65fc        device

adb shell

Result: shell@jflte:/ $ su
1|shell@jflte:/ $ #
1|shell@jflte:/ $ adb root
* daemon not running. starting it now on port 5038 *
* daemon started successfully *
error: device not found

mount -o remount,rw /system

Result: mount: Permission denied

mount -o remount,rw -t ext4 /dev/block/actc /system

Result: mount: Permission denied

There are others that I tried, but this post is already so long...
Still, when I try to install any app with System Apps Installer or other as root, as I could before, I invariably get the same answer: Mounting error, Cannot mount system partition as Read/Write.

I found a few advices to use the command cat /proc/mounts  to find problems. I did, but I post a copy of the very long result after this text because I can’t find anything by myself. Perhaps it will help someone to help me.

The same happens now with the other slightly older backups that I restored, but at the beginning I even installed an application in the /system. Why has this changed? Could it have been from the latest updated SuperSU version, because I read on XDA Developers it has issues and recommend changing to an older version? I searched a lot and found many threads about this permissions problems but none changing like mine, and none solved. I wonder what the cause can be and. Why so many threads about the root permissions issue and not a single one solved?
Thank anyone for any welcome help. Sorry for being so long, but I really want to repair this issue and with so many threads about it I couldn't find just one solution.

Result from command cat /proc/mounts

root@jflte:/ # cat /proc/mounts
rootfs / rootfs ro,relatime 0 0
tmpfs /dev tmpfs rw,seclabel,nosuid,relatime,mode=755 0 0
devpts /dev/pts devpts rw,seclabel,relatime,mode=600 0 0
none /dev/cpuctl cgroup rw,relatime,cpu 0 0
proc /proc proc rw,relatime 0 0
sysfs /sys sysfs rw,seclabel,relatime 0 0
selinuxfs /sys/fs/selinux selinuxfs rw,relatime 0 0
debugfs /sys/kernel/debug debugfs rw,relatime 0 0
none /sys/fs/cgroup tmpfs rw,seclabel,relatime,mode=750,gid=1000 0 0
none /acct cgroup rw,relatime,cpuacct 0 0
tmpfs /mnt/secure tmpfs rw,seclabel,relatime,mode=700 0 0
tmpfs /mnt/asec tmpfs rw,seclabel,relatime,mode=755,gid=1000 0 0
tmpfs /mnt/obb tmpfs rw,seclabel,relatime,mode=755,gid=1000 0 0
/dev/block/platform/msm_sdcc.1/by-name/apnhlos /firmware vfat ro,context=u:object_r:firmware_file:s0,relatime,uid=1000,gid=1000,fmask=0337,dmask=0227,codepage=cp437,iocharset=iso8859-1,shortname=lower,errors=remount-ro 0 0
/dev/block/platform/msm_sdcc.1/by-name/mdm /firmware-mdm vfat ro,context=u:object_r:firmware_file:s0,relatime,uid=1000,gid=1000,fmask=0337,dmask=0227,codepage=cp437,iocharset=iso8859-1,shortname=lower,errors=remount-ro 0 0
/dev/block/platform/msm_sdcc.1/by-name/system /system ext4 ro,seclabel,relatime,errors=panic,data=ordered 0 0
/dev/block/platform/msm_sdcc.1/by-name/userdata /data ext4 rw,seclabel,nosuid,nodev,noatime,discard,journal_checksum,journal_async_commit,noauto_da_alloc,data=ordered 0 0
/dev/block/platform/msm_sdcc.1/by-name/cache /cache ext4 rw,seclabel,nosuid,nodev,noatime,discard,journal_checksum,journal_async_commit,noauto_da_alloc,errors=panic,data=ordered 0 0
/dev/block/platform/msm_sdcc.1/by-name/efs /efs ext4 rw,seclabel,nosuid,nodev,noatime,discard,journal_checksum,journal_async_commit,noauto_da_alloc,errors=panic,data=ordered 0 0
/dev/block/platform/msm_sdcc.1/by-name/hidden /preload ext4 ro,seclabel,nosuid,nodev,relatime,data=ordered 0 0
/dev/block/platform/msm_sdcc.1/by-name/persdata /persdata/absolute ext4 rw,seclabel,nosuid,nodev,relatime,data=ordered 0 0
/data/media /mnt/shell/emulated sdcardfs rw,seclabel,nosuid,nodev,relatime,uid=1023,gid=1023,derive=legacy,reserved=20MB 0 0
/data/privatemode /mnt/shell/privatemode sdcardfs rw,seclabel,nosuid,nodev,relatime,uid=1000,gid=1000,derive=none 0 0
/data/knox/sdcard /mnt/shell/knox-emulated sdcardfs rw,seclabel,nosuid,nodev,relatime,uid=1000,gid=1000,derive=none 0 0
tmpfs /storage/emulated tmpfs rw,seclabel,nosuid,nodev,relatime,mode=751,gid=1028 0 0
/dev/block/vold/179:33 /mnt/media_rw/extSdCard vfat rw,dirsync,seclabel,nosuid,nodev,noexec,noatime,nodiratime,uid=1023,gid=1023,fmask=0007,dmask=0007,allow_utime=0020,codepage=cp437,iocharset=iso8859-1,shortname=mixed,utf8,errors=remount-ro 0 0
/mnt/media_rw/extSdCard /storage/extSdCard sdcardfs rw,seclabel,nosuid,nodev,relatime,uid=1023,gid=1023,derive=unified 0 0
/data/media /storage/emulated/0 sdcardfs rw,seclabel,nosuid,nodev,relatime,uid=1023,gid=1023,derive=legacy,reserved=20MB 0 0
/data/media /storage/emulated/legacy sdcardfs rw,seclabel,nosuid,nodev,relatime,uid=1023,gid=1023,derive=legacy,reserved=20MB 0 0
root@jflte:/ #

Title: Writable System Revets to RO


问:
Google Play Movies & TV has stopped - but not even installed
Around 2-3 times a week I'm getting this popup error - but the app isn't even installed!

Any idea what's going on? Is it hiding in another Google app and that's why I don't find it?

I couldn't find any rule for when it happens - while scrolling Facebook, browser, while idle... ¯\_(ツ)_/¯

What can I do about it?

Popup error:

The app isn't installed: (It's the full list, including system apps)

Device details: LG G5; Android 7.0; stock ROM; no root.


问:
Transfer WhatsApp chat from iPhone to Android
I recently moved from iPhone to Android, now I want to transfer all my WhatsApp chats to my new Android phone from iPhone, but the problem is WhatsApp doesn't have any feature to transfer chats between different platforms, so I was looking for third-party apps which can make this possible, but no luck till now, please share your thoughts and experiences.</p>


问:
Bricked Nexus 7, failed to mount cache, can't unlock or reflash
My Nexus 7 (2013, 2nd gen) worked fine in plain vanilla form for years. Suddenly the boot stuck at "Google". I tried booting into recovery mode and saw failed to mount /cache. Erasing cache from the recovery screen did not help. I tried WugFresh Nexus Root Toolkit v2.1.9, and it froze at the unlock step. I tried Fastboot and it also froze at the unlock step with the following response:

```<code>platform-tools>fastboot oem unlock
...
(bootloader) Unlocking bootloader...
(bootloader) erasing userdata...
</code>```

I tried fastboot format cache and fastboot erase cache but they both just hung at erasing 'cache'...

It appears that I cannot reflash the Nexus 7 back to factory fresh because it is failing to unlock the tablet or possibly rewrite memory in any way.

Is there any stronger method I can use to wipe out this tablet and reload it back to any usable form?  Or fastboot commands I haven't tried yet? Or something completely different?

Failing recovery, is there anything useful I can do with a nearly new looking 7 inch tablet or its component parts?

edit:

Today I tried adb sideload of the latest fresh image. It looks like my tablet is mostly choking on:

E: failed to mount /cache (Invalid argument)

Is there a way to destroy and recreate the cache as opposed to erasing or reformatting an existing cache?


问:
My own signed APK now warning of "unrecognised developer" when installing locally
This warning has started showing up literally in the last day or so, whereas previously my own APK (signed with a keystore/password that I have successfully used on currently released software) would just install locally without fuss.

I'm now being told that the play store doesn't recognise my account and requires me to click "continue to install anyway" in order to install it.

What has changed over the last few days?

EDIT: I suspect it is something that's changed in the play store, instead of something I've done, because I went back and tried installing from some previous APKs I built and deployed without incident a few days ago, and they are also showing the same error.


问:
How to prevent S7 edge from connecting to open WiFi networks?
I have a Samsung Galaxy S7 edge running Android 8.0.

Is there a way to prevent the phone from connecting to open wifi networks? If wifi is on, the phone will always connect to any open network within reach, even new networks I had never connected to (so "forgetting" them does nothing).

It's annoying, not to mention a privacy/security risk, because most of these networks require some kind of login via a browser, so connecting to them effectively means disabling internet access.

E.g. I may be walking down the street or in a bus, the phone picks up the network from a cafe, a hotel, a taxi, and whatever I was doing that required a data connection (eg streaming music) stops.

I seem to remember there used to be an option to prevent connections to open wifi network in earlier Android versions, but I can't find it - don't know if it was removed in Android 8 or by Samsung. All the solutions I have found online refer to older versions of Android.

Thoughts?

Thanks!


问:
Huawei Mate SE no update option
I got a Huawei Mate SE and have been using it for a few weeks. I've noticed on the internet that it should have the Oreo (8.0) Android update, but I don't see the update option on my phone. Usually, it should be the bottom option in the settings or an app icon on my launcher but it's not there.

My phone was rooted and I had the bootloader unlocked, but I un-rooted it and relocked the bootloader and still can't update. The themes app is back, which goes away when it's unlocked, but I would like to get the latest EMUI version on my phone. Any ideas to get this functionality back? I have also tried factory reset after I relocked it and un-rooted it but no luck.

Title: Huawei Mate SE no update option


问:
How to enable the radio transmitter on yureka
So just a couple of hours ago, I unlocked the device's boot loader and after boot up, I noticed a strange app in the app drawer which was called radio transmitter. I excitedly opened the app. But, the thing is that, right after boot up, the everything was kind of super laggy and amidst the lag I killed the radio transmitter. Now, its gone from the app drawer. How can I get it back?</p>


问:
Restore Notifications Sound Volume without Factory Reset?
My HTC Desire 728 (Android 5.1) suddenly stopped emitting any notification sounds for Messages (SMS aka "text") and WhatsApp incoming messages.

First thing I did was to check the "global quick setting" for the speaker: It's on Normal (i.e. not silent or vibrate).

Then, I checked Settings > Sound & notification > Notification sound. Sound is selected as should be but when I click it (or press the volume up mechanical button), its volume is extremely low, practically silent. Repeatedly clicking it (or pressing the volume up button) increases volume until it sounds just fine. But as soon as stop clicking it, within 2-3 seconds it returns to the problematic silent volume setting.

This is not how it used to be and it appears that there is something (app? service? daemon?) that forces the volume back to silent.

I wiped the cache partition as well but that did not help.

Any idea how to solve this without needing to go through the hassle of entire factory reset?

Note: All other sounds (ring, media, in-call are fine). It's only the Messages/WhatsApp notification sound that misbehave.

UPDATE: Groping in the dark, I continued to troubleshoot and I found that the problem is in essence Notifications volume turning itself down. One can learn from that thread a factory reset does not help anyway. I will study that thread and report back.


问:
Can I safely power on my Moto G2 LTE without the camera hw module?
I have recently dropped my phone and the flashlight and camera suddenly stopped to work. I suppose this is an hw failure, so I have ordered a new module.
Meanwhile I noticed a huge battery drain (-25%) in the night (normally is 1-2%). I would like to remove the module before the package arrives.</p>


问:
Problems connecting to WhatsApp from desktop
I always have problems connecting to WhatsApp desktop/web (I usually use desktop, but it's the same concept) - it says it can't reach the phone.

Now, the thing is that it has problems connecting even when WhatsApp is open on my phone and I'm using it (not in the background, actually open).

The internet is working well both on the phone and computer, since I use it at the moment - but it still can't connect or will take significant time and multiple tries until succeeded.

Ideas? Something I can check?

Device details: LG G5, Android 7.0, stock, no root


问:
How does Samsung's WiFi Sharing work on a low level?
Samsung have had a feature called WiFi Sharing in their Android devices for some time.

This extends the tethering or hotspot function to be able to share another access point via its own SSID (with the same configuration that'd normally be used for sharing LTE).

How does this work on a low level? Could this function theoretically be added to other Android devices or even AOSP? What features of a WiFi chipset allow this to work?

I see What is the functionality concept behind Wi-Fi sharing (aka Wi-Fi Profile share)? but it only talks about the Android side, not the kernel or hardware side. It's also pretty incorrect as WiFi Sharing (at least on the S8+) doesn't use WiFi Direct at all.


问:
certain apps won't download
the google play store won't open or download certain apps.  most apps open fine and have no problem downloading updates, but a few are giving me trouble and not even letting me open their page on google play, giving an error that there's no internet connection, even while other apps are actively downloading updates.

i've tried clearing cache and data from the apps several times, cleared the phones cache, ensured the accuracy of the date and time on the phone, removed and re-entered my google account, made sure gmail was updated, uninstalled google play updates, and even reset the phone to factory settings and reinstalled everything... and still have the same trouble with certain apps.

the best i've been able to manage was after uninstalling updates to google play i was able to view the apps pages on the old version of google play and install them, but after google play updated i couldn't update the apps, and the versions installed were not the current versions for some reason.

the apps affected include google play games, google play books, google calendar, facebook, and a game i'm trying to get back into summoners war.  i'm sure there are others that wouldn't work either that i didn't check.  every time i try to go to these apps pages on google play or update them in my apps i get the same error about no internet connection, even while other apps are currently downloading updates.

why would this happen only for certain apps and how can i fix it?

Title: certain apps won't download


问:
Is there any solution to the lack of manual focus?
The Huawei P20 pro, and possibly other Huawei devices, seems to lack a manual focus (or perhaps even a good autofocus) in the front camera app. This can be an issue for close-up photos. </p>

<p>Is there any way around this? Installing other apps, rooting the phone, installing a different ROM...? </p>


问:
Why does VoLTE deployment only take a "Carrier Update" on iOS for all iPhones to have it enabled, but only a select few Android handsets get it?
I am guessing carriers need to adjust the software, but why isn't this negotiated by Android by default so that no modifications would be necessary? Why is there no equivalent of "carrier updates"?</p>


问:
Apps are randomly opening up after unlocking my Redmi Note 4 through fingerprint sensor?
I am experiencing this for about 2-3 weeks.
When I unlock my phone a random app(which are on home screen, I think) opens up automatically.
The apps which I mainly noticed are WhatsApp and themes.

Is this a result of malware or anything else? How to fix?
I did a bit of research on it sites like quora, android central, etc.

But none of them seems to work for me.


问:
Tasker service still want to start after uninstalling it
Here is a warning from my Logcat

07:04:44.099 ActivityManager( 1143)  Unable to start service Intent {
  act=android.service.notification.NotificationListenerService
  cmp=net.dinglisch.android.taskerm/.NotificationListenerService } U=0:
  not found

I unistalled Tasker a few months ago.
Why is there still a call to start a service?


问:
How can I remove com.android.service, launcher3, Medias and Shell?
I own a cheap Chinese android phone which I use for my everyday tasks and I am having issues with what I understand is malware.

Frequently, Google Play informs me to

Disable harmful app "com.android.service" can damage your device

which I proceed to do but to no avail; this happens around 5 to 10 times in a single day and I suspect it has to do with how often I enable my Wi-Fi and/or restart the device but I could be wrong.

I have installed Malwarebytes, AVGAntivirus and CCleaner. Occasionally, Malwarebytes and AVGAntivirus will identify some malware which will then go on to remove successfully.

I have had these applications occasionally flag something (app?) on my phone entitled launcher3 and Medias which I have unsuccessfully tried uninstalling.

Recently I found out I could restrict "launcher3"'s permissions which I went on and did.

I'm not sure if this is the case but since then, I have been experiencing pop-ups from something (app?) entitled "Shell" with ads and usually when firing Firefox (I don't use Chrome) and/or when I enable my Wi-Fi and/or when I restart my device, Firefox opens a some random add-like tab.

I don't know if it's for the better or for the worse but in the majority of cases whatever ad content I'm being served doesn't display correctly, only partially.

My question is pretty straightforward:

What do I have to do to get rid of all these nuisances and be able to use my phone as intended?


问:
How to backup and restore APN setting via ADB?
How to backup and restore APN setting via ADB?
I'm on Android 6.0 without root.</p>


问:
Xiaomi Mi A1 System Update installation problem
I wanna update my mi A1 phone through System update. It download the file but I get "Installation Problem" Error.

Is there any way to solve the problem? Or any way to download the file and install it manually? I downloaded it 3 times and every time got the same error.

Screenshots (click to enlarge)


问:
Xiaomi Mi A1 phone won't turn on
I tried to install android 8.1 on my Mi A1 phone by following instructions from this site. After finishing the installation when I tried to reboot the phone, The phone turned off and I cant turn it on again.

When I hold the power button or when I connect the phone to PC, the LED start blinking with a vibration.

Please help... I bought the phone recently and I think I destroyed it in less than a weak :'‑(

Title: Xiaomi Mi A1 phone won't turn on


问:
How to stop apps from self installing
I have a problem for quite some time now. An app called xeroxservice which does not have any icon except that of apps like Google framework etc keeps downloading and installing itself without permission and notification. I can locate the apk in download folder. If I Uninstall it, it downloads another apk and install itself. It is surprising that  unknown source is unchecked and play store automatic update turned off. Virus scan doesn't detect anything and my device is not rooted. I Uninstalled all bloatwares and even stock browser with adb. Is there a way I can handle this it without factory reset? Thanks friends </p>

Title: How to stop apps from self installing


问:
Changing App Installer to Flashable Installer?
Hello There Everyone!,

To clarify the title...

Is there a way to change, modify, convert, etc... an App Installer (.apk) to a Flashable Installer (.zip).

I'm not referring to just creating a zip to simply copy the apk file to its desired directory but, to either install the app as a new app and/or upgrade an existing one in the same/similar fashion as would an apk itself would be installed.

I tried to search around and the results aren't specific to what I'm asking and reflects the copying of the apk file rather than the installing of it.

I hope that I had explained this okay via text... :-)

Thank you very much for your time and understanding with this question!

~Ibuprophen


问:
Samsung .cloudagent/cache
Can the Samsung .cloudagent/cache be cleared without repercussions? It is taking up the storage space along with the thumbnails files doubling the amount.</p>

Title: Samsung .cloudagent/cache


问:
Mobile hotspot was working with wifi-on; now it doesn't
Was sending internet service to my tablet through a newer Moto phone that was able to get internet from a Optimum hotspot. The tablet was unable to receive the signal.

Was using it this way for a few hours just before and it was working fine. Now when I turn on the mobile hotspot on the Moto the Wi-Fi automatically turns off. What gives??


问:
ADB shell change camera mode
I am playing around with the ADB shell to control a Samsung Galaxy S9 remotely.
I can do most of the things I wanted to but I struggle finding a way to switch / toggle the camera modes.

I searched everywhere and found very little information about this. I only found how to switch between front or back facing camera but I want to be able to select my slow motion mode.

Maybe I am not looking at the right place...

Does anyone have an idea how could I do this?

Any help is very much appreciated

thank you

Title: ADB shell change camera mode


问:
Android 7.0 drops wifi connection to router without internet connection
I use a TP-Link TL-WR702N mini router to provide a wireless connection to my Nikon D4 DSLR to operate the camera remotely via my phone or tablet. The camera acts as a server when doing so.

This worked for: Archos Titanium running Android 4.3; Asus Zenpad running Android 5.0; Samsung Galaxy S3 running Android 4.3

It does not work for: Samsung Galaxy S3 running Android 7.0; Motorola Moto E running Android 6.0; Huawei P8 Lite 2017 running Android 7.0

So I believe this is an Android problem, rather than a problem with the router or device model.
What happens is that I can connect to the router, but the connection drops out after a few seconds, then searches for an IP address and reconnects, and so on. Where a dialogue pops-up asking to keep the connection alive even though there is no internet, I have clicked 'yes' only for the problem to persist. I have also enabled the wifi connection to stay on when the device goes to sleep.
The devices have no problem staying connected to our home router.

Does anyone know a solution?


问:
Google Maps with Offline Maps sometimes gets stuck on "Finding best route"
Google Maps with Offline Maps sometimes gets stuck on "Finding best route"

I don't think it's a GPS issue 'cos my phone's GPS is normally fine and also, as soon as I connect to WiFi it gets past the "finding best route" screen.   Also I guess if it can't find a good GPS fix then I doubt it'd say "finding best route".  My experience with google maps has been that if it can't get a good fix it still gets to the navigation screen.

And it's definitely not an offline map issue.  I have quite a big offline map, not yet expired, and like 600MB covering an area that includes all of london and quite far behond, so (while my sense of direction isn't great), I don't think map coverage is the issue here.  Also if I choose a postcode that is definitely outside my offline map, like somewhere in Glasgow, then I get a different message "no results found in your offline areas".  The postcode is well within my offline map, and if it wasn't, that wouldn't cause the "finding best route"(and not moving beyond that message), error.


问:
Moto g4 plus can't be unlocked
When I go to unlock my moto g4 plus, I get a message that my computer cannot be unlocked. This is the getvar all result

```<code>(bootloader) version: 0.5
(bootloader) version-bootloader: moto-msm8952-B1.07
(bootloader) product: athene_16mp
(bootloader) board: athene_16mp
(bootloader) secure: yes
(bootloader) hwrev: P2A
(bootloader) radio: 1
(bootloader) storage-type: emmc
(bootloader) emmc: 64GB SAMSUNG RC14MB RV=08 PV=07 FV=0000000000000007
(bootloader) ram: 4GB SAMSUNG LP3 DIE=8Gb M5=01 M6=05 M7=00 M8=5F
(bootloader) cpu: MSM8952
(bootloader) serialno: ZY223D4PT9
(bootloader) cid: 0x0032
(bootloader) channelid: 0x8d
(bootloader) uid: (ommited)
(bootloader) securestate: oem_locked
(bootloader) iswarrantyvoid: no
(bootloader) max-download-size: 536870912
(bootloader) reason: Reboot mode set to fastboot
(bootloader) imei: (ommited)
(bootloader) meid:
(bootloader) date: 09-11-2016
(bootloader) sku: XT1644
(bootloader) battid: SNN5970A
(bootloader) iccid:
(bootloader) cust_md5:
(bootloader) max-sparse-size: 268435456
(bootloader) current-time: "Mon Dec 26 17: 6:59 UTC 2016"
(bootloader) ro.build.fingerprint[0]: motorola/athene_f/athene_f:7.0/NPJ
(bootloader) ro.build.fingerprint[1]: S25.93-14.7-5/6:user/release-keys
(bootloader) ro.build.version.full[0]: Blur_Version.25.251.6.athene.reta
(bootloader) ro.build.version.full[1]: il.en.US
(bootloader) ro.build.version.qcom: LA.BR.1.3.6-01710-8976.0
(bootloader) version-baseband[0]: M8952_70030.25.03.64.01R ATHENE_RETUSA
(bootloader) version-baseband[1]: _CUST
(bootloader) kernel.version[0]: Linux version 3.10.84-g2ccb7a8 (hudsoncm
(bootloader) kernel.version[1]: @ilclbld86) (gcc version 4.8 (GCC) ) #1
(bootloader) kernel.version[2]: SMP PREEMPT Sat Feb 3 22:42:15 CST 2018
(bootloader) sbl1.git: git=MBM-NG-VB1.07-0-g57d1343
(bootloader) rpm.git: git=a970ead
(bootloader) tz.git: git=69dd24b-dirty
(bootloader) hyp.git: git=69dd24b-dirty
(bootloader) keymaster.git: git=69dd24b-dirty
(bootloader) cmnlib.git: git=69dd24b-dirty
(bootloader) aboot.git: git=MBM-NG-VB1.07-0-gf9b89ba
(bootloader) qe: qe 0/0
(bootloader) frp-state: no protection (144)
(bootloader) ro.carrier: retus
all: listed above
finished. total time: 0.076s
</code>```

The cid is listed as valid on their post, and others can unlock their moto g4 pluses

Title: Moto g4 plus can't be unlocked


问:
Why SIM Toolkit icon is duplicated (now tripled) in launcher?
UPDATE: It stopped happening after the latest OS (and launcher) update - to Android 8

Why does my SIM Toolkit icon is <s>duplicated</s> tripled?

The second one appeared not so long ago, and it never happened before (I have the phone for more than a year and a half).

There wasn't an OS update when it happened, or something I can think might affect, and there's only place for one SIM in that device.

Note:

It happens only in that launcher.

Reboot or re-inserting the SIM does not change it.

Clearing launcher app cache doesn't help.

I don't want to clear the app data, because I'll probably lose the organization of the apps.

It appears only once in the app list in the settings.

Device details: LG G5, Android 7.0, stock ROM, no root

Launcher: Home & app drawer (By LG)


问:
Keep Localhost Server app in background until I turn it off
I'm using a Localhost server Android App. Which I use to develop WordPress and writing articles.

But, the problem is it destroys after some times. Because, I've keep this app on background.

When I develop another websites it stays for maximum 5/6m but only best 20s for WordPress.

I'm using Low Ram Config but it isn't working for me.

You see the screenshot here

Device Log

Symphony Marshmallow 6.0

No Root ( Unable to root)


问:
Why flashing a ROM causes the IMEI to go 'generic' -sometimes (even if it's a stock ROM)?
the story I'll tell you will help you with the answer.

One year ago, my dad's phone (Galaxy Note 3) had many issues (because the phone was rooted and something messed up the system files). I've tried to flash a stock ROM using Odin (I was sure that the downloaded ROM matched the model and the PDA/AP). After flashing the ROM, everything was working fine except the mobile-related functions. The IMEI has been changed to a generic one (it started with 0049*********) and so the phone wasn't able to connect to the mobile network (no calls, no sms, no mobile internet).

That was even weirdier, because the first time I flashed that phone (to downgrade to Android KitKat), the IMEI remained untouched, but the last time the IMEI was altered.

So, why does flashing a ROM sometimes reset the IMEI?


问:
Recover internal data from a working phone but with broken screen, no developer mode and locked
I don't know if this is the right SO community to ask this.

I have a Samsung Galaxy with the screen BROKEN, but just the screen, not the mobile.

I'd like just to EXTRACT all data from internal memory.

We have tried a lot of softwares and solutions from Internet forums, but all of them requires DEVELOPER MODE or the device UNLOCKED.

I don't have DEVELOPER MODE on, and I can't unlock because I see nothing in the screen. Even we tried to plug an external mouse and try to click (blindly) in the numbers to pass the PIN screen. (The mobile works, because it vibrates after power on.)

Is the any solution to recover internal data?

It does not matter if I need to OPEN the phone, I will trash it after recovering, I don't need it to be operative again, I just need the internal data.


问:
Carbon ROM update fails: Failed to setup flash. Clean /cache and retry
I try to update to the latest Carbon ROM. The check is successful, but the flash fails with "Failed to setup flash. Clean /cache and retry."

I already went to Settings > System > System Updates > Settings (right-top corner) > Clean update files [Delete existing update files to force downloading full update]

and tried the update again without success. Happens the first time for me, last update was just recently on 8. May without problems.

I also just tried going in Recovery Mode > Team Win Recovery Project > Wipe > Advanced Wipe > select Cache > Wipe. But the problem still remains after the reboot.


问:
Detecting incoming/outgoing whatsapp messages
I just want to know if there is a way i can check for send and received whatsapp message on android, i tried to get the notifications but when the user is in whatsapp, there is no notification shown, also you can't get the sent whatsapp messages this way, is there a way that i can do it without reading its db, and if i was going to read its fb how could i accomplish it? It is encrypted like I know and the encryption between each user differs right ?</p>


问:
Alert only on Text Message
I use a Motorola G5 Plus with Android 7.0 on it.

I'm on-call sometimes on nights and I want to be alerted in case there's a problem. I've forwarded important alerts to SMS text. I do NOT want to be alerted for everything that goes on on my phone but I do want to be alerted in case a text message comes in.

I've tried using Automate and Tasker but neither one is triggering on the text. Is there a better/easier way to ONLY be alerted when a text message comes in to an Android phone?

Title: Alert only on Text Message


问:
Samsung S2 reads out message aloud
Some one has changed my phone settings, so when I recieve an SMS from any number the message is read out loudly.

Can someone tell me how to disable this?

My driving mode is turned off too.

Title: Samsung S2 reads out message aloud


问:
Asus max 5.5 adb won't recognize device after unlock bootloader
Hey guys so I have encountered this problem multiple times. Followed this thread for unlocking bootloader and initiating root: http://www.symbianize.com/showthread.php?t=1411778

so far I went up to unlocking bootloader successfully without any hindrances but to my dismay after unlocking bootloader, adb won't recognize my device and can't proceed to flash TWRP. Tried rebooting to fastboot and typing in cmd adb reboot bootloader but did not proceed because as I said the device isn't recognized. Using windows 8 64-bit. Device is Asus zenfone 3 max variant 5.5 (zc553kl) updated to latest firmware nougat 7.1.1

I have usb and adb drivers installed, but the device doesn't even show up in the device manager, so adb reboot bootloader didn't find anything to reboot.

Any advice would be helpful. Thank you!


问:
How to reinstall stock firmware on Galaxy S4 SCH-I545
I rooted my phone to get rid of bloatware and free up internal storage.  It worked but then I uninstalled the root app and my phone was having issues.

I did a factory restore and now when moving through the setup wizard it throws an error  "unfortunately, setup wizard has stopped" and starts back at beginning of setup wizard.

Any idea how to reinstall the stock firmware to get my phone going again?

Edit:

```<code><ID:0/004> Added!!
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<ID:0/004> Odin engine v(ID:3.1203)..
<ID:0/004> File analysis..
<ID:0/004> SetupConnection..
<ID:0/004> Initialzation..
<ID:0/004> Get PIT for mapping..
<ID:0/004> Firmware update start..
<ID:0/004> SingleDownload.
<ID:0/004> aboot.mbn
<ID:0/004> FAIL! (Auth)
<ID:0/004>
<ID:0/004> Complete(Write) operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)
</code>```


问:
Understanding Partition Size On /proc/partitions
I am trying to build a LineageOS ROM for an unsupported device, i need to get the partition size of the device, I have a rooted device and then went to /proc/partitions via root explorer, and I have like-

major minor  #blocks  name

7        0      65536 loop0

   7        1      98304 loop1

 179        0  122138624 mmcblk0

 179        1      16384 mmcblk0p1

 179        2      16384 mmcblk0p2

 179        3      16384 mmcblk0p3

179        4       4096 mmcblk0p4

 179        5      16384 mmcblk0p5

179        6      16384 mmcblk0p6

179        7       2048 mmcblk0p7

179        8       1024 mmcblk0p8

179        9       1024 mmcblk0p9

179       10      40960 mmcblk0p10

179       11       8192 mmcblk0p11

179       12      32768 mmcblk0p12

179       13       8192 mmcblk0p13

179       14      65536 mmcblk0p14

179       15     262144 mmcblk0p15

259        0     307200 mmcblk0p16

259        1      32768 mmcblk0p17

259        2    2359296 mmcblk0p18

259        3  118931419 mmcblk0p19

179       48       4096 mmcblk0rpmb

179       32       4096 mmcblk0boot1

179       16       4096 mmcblk0boot0

179       64    7761920 mmcblk1li

179       65    7757824 mmcblk1p1

I want to under the in which format these block sizes are. whether
 they are in bytes, kb or mb?

As I know mmcblk0p1 is the boot partition and its block size is 16384, so what it will be in bytes?


问:
How to disable "Alarms only" mode that activates during each call?
On my Moto E4 / Android 7.1.1 the "Alarms Only" mode auto-activates itself during each call.

It happens during every call, no matter, if this is placed or received call.

As you can see on following images, all my "Do Not Disturb" settings are purely default and all my automatic rules are set to "Off". Thus I have no idea what can be causing such behavior.

Things that I tried so far:

I have two other Motos (G4 and E3). I have checked them. Turned out that all three has exactly the same configuration and only E4 works this way.

I have deleted all automatic rules (thinking that maybe "Off" is not enough, since this is Google), but that brought no help.

How can I disable this feature or change my phone's behavior?


问:
How can Android run a disabled application?
I have just run into a situation described in this blog:

Can any one explain this to me? How can Android run a disabled application? What good do we have from marking applications as disabled, if system is ignoring that?

How can I force Android to respect my will and to never execute a disabled app?


问:
Using same google account on multiple devices
So I have a digital signage application installed on my android tv devices, which I install at various offline stores, which show ads at their stores (remotely configured by me) with my apk (preinstalled from play store). Now this will be across many stores, and I would be using the same gmail account to sign in to play store on those devices. This causes a popup on other devices showing did you login on another device? How to prevent this and solve this problem which I am facing? I doubt even G-Suite allows this.</p>


问:
Reality check – Has ES file explorer abandoned its pro version?
Has anybody else wondered if ES Global decided to make money with their Explorer app by abandoning the pro version altogether and milking the free version?

I have used ES file explorer for a long time. I've been having more and more problems with the pro version with regards to cloud networking, which is one of the features that I use most. Sometimes it grants me access to all Google Drives, other times not at all, and most frequently only to some drives.

I decided this morning to try their free version. Their free version  not only worked extremely well with Google Drive, the connection is much faster than the pro version. In contrast, they have apparently spent a lot of effort updating the crapware. Today it felt like trapware. I was asked to install other apps in order to access features. So I did, to test this, and immediately uninstalled them. I still had access to the features but I feel like I need to take a long hot shower.

Have other people seen this? Is this a new moneymaking  twist – offering a pro version without ads and updates while milking the free version? Or am I missing something?


问:
How to disable Google Map's direction indicator?
Where the indicator wouldn't be accurate, having it is just noise; Is there a way to stop it from showing?

The indicator:


问:
Erasing boot failed,device may be locked
I am flashing fastboot ROM in my mi A1 using mi flash tools but at the time of flashing it is showing the error:erasing boot failed device may be locked and I am not able to flash the ROM.Why is this happening?</p>


问:
Recent bluetooth signal strength drop
I used to walk out of my apartment, walk down three floors and across the parking lot before my Bluetooth signal disconnected. Now I have to hold the phone at chest level or sound starts to stutter if I lower phone to waist level.

It's not the headphones because my Sony speaker brick also lost range.

This started about a month ago and I wonder if it was because I installed the SMS Pro Messenger app? Or are they like Apple and wrote a routine to lower signal strength after you owned the phone for two years?

How does one go about analyzing if it's hardware signal strength problem or firmware related? I'm not adverse to resetting factory settings but don't want to reinstall everything if there is no chance of improving situation.

Phone: Alcatel OneTouch Idol 3 5.5".

Model Number: 6045I

OS: Android 6.0.1

Android Security Patch Level: November 1, 2016

Kernel: 3.10-49-ga7fff7c

Build Number: 7VGE-UDE1

Title: Recent bluetooth signal strength drop


问:
Android 6.0.1 (rooted) blocking usb tethering of wifi connection (carrier has no problem)
I know there are a number of questions on similar topics but I believe my issue is different, let me explain:

I'm in Spain where the carriers do allow usb tethering of wifi connections (the phone is connected to a wifi network and I'd like to tether this connection via usb to my laptop so the laptop uses the wifi connection of the phone). I know this is possible because on my samsung galaxy note 1 with android 4.4 I can do it, no problem.

With my new samsung galaxy note 4 (unlocked, originally t-mobile) with android 6.0.1 if I have an active wifi connection and turn on usb tethering a popup tells me that

```<code>Attention

Wi-fi is turned off when usb tethering or mobile hotspot is active.
To turn on wi-fi please turn off usb tethering or mobile hotspot.
</code>```

So basically I have to choose between wifi and usb tethering, can't have both. I can only tether the mobile data not the wifi connection.

The phone is rooted so I tried a couple of things I found on stackexchange and xda-developers:

Modifying the settings database (as root):

```<code>settings put global tether_dun_required 0
settings put system tether_entitlement_check_state 0
</code>```

Adding this to /system/build.prop (as root):

```<code>net.tethering.noprovisioning=true
</code>```

But still no luck :(

To be sure it's really the OS which is doing the blocking, not the carrier so on a rooted phone I should be able to go about it I guess.

It would also help if I could figure out which process is the one which actually does the blocking and then I could go after that somehow. Is there a way to figure this out?


问:
My real device has an IMEI of 012345678912345 - why?
I recently found one of my old Android devices (Orbo Jr. w/Rockchip ZX-2926D, Android 4.4.2), charged it, and turned it on. After exploring the settings, I found it had an IMEI number of 012345678912345 - definitely not unique. After some research, it seemed to belong to Android-x86 devices with tons of hints to Virtualbox and QEMU in its system file names.

Looking up the number on imei.info ends up with "Invalid number".

I would dial *#07# on its Phone, but there is no phone. Although (about every 6 months or more), it gets malware calling itself "Phone".

It has been factory reset twice before looking at the IMEI number.

I found how to (semi) change it here, but am having an issue getting it to root (even if I wanted to use it, I couldn't). Towelroot says "your device is not supported", and KingRoot says "Rooting error".

Why does this device has an invalid IMEI?


问:
How to open web links in external browser like Chrome from Reddit?
I have a habit of using an external browser for web links to generally read articles, but wherever I click on any link it opens up in the internal browser which prevents me from using Reddit otherwise at the same time in my Android smartphone. How do I open web links from Reddit in an external browser like Google Chrome in my Android smartphone?

P.S. I am using official Reddit app for Android. Reddit for Android has its own browser to load web links. Is there any way to get rid of that and open web links in any external browser like Chrome?

OwnerDisplayName: iamsumitd


问:
Recover phone data from encrypted Android phone with broken screen (still being online)
my phone's touchscreen (OnePlus 3) got broken entirely yesterday (black, unresponsive, cracked => total damage!). Considering investing in a screen repair I'd really would like to know if there's any possibility for me to access my data partition. Connecting my phone under Ubuntu adb shell does not find any devices, since I could not unlock the device's display I guess. Is there any (Linux) way to do that?

best
Andi


问:
Solved a known bug, users option disappeared from settings
I have a Asus zenfone 2 running official android m. I had the same problem as the guy in this thread:
Home Screen and Recent Apps buttons don't work

Before I could fix it, I tried the guest mode method. I pressed on the guest mode icon in the quick settings, it switched to guest mode, stayed there for about 5 seconds, then automatically switched back to my own profile and suddenly the users icon disappeared from the quick settings tray and the users option disappeared from the settings page. No more possible ways to switch users or enter guest mode.

I solved the main problem using the nova launcher method, but my phone didn't have the setup wizard test activity, instead I managed to fix it with the Asus setup, not the stock Android one.

It fixed everything, but the users setting is still missing. I've ran the check max-users command in the terminal and it said 1. Phone isn't rooted so I can't change that. Is there any way for me to get back the users or guest mode option without rooting?


问:
Android Studio 3 in Ubuntu 17.04 not see Nexus 7 in connected devices to run the App with
I'm using Android Studio 3.1.1 in Ubuntu 17.04 and a Nexus 7.

Android Studio not see the device in the list of the "connected devices" in the window to run the App:

The device is already activated as Debug USB with MTP USB type, and I already choose "Ok" for every prompt asking to allow the USB connection with the PC.

It is showed in the media connected to ubuntu, but clicking on it appear this error:

I already tried all guides founded on the Web but without success.

I already installed:

android-tools-*

adb

mtpfs

go-mtpfs

The Nexus 7 has Android 5.1.1

Note: I can use my Samsung Galaxy S5 Neo connected with Android Studio to run the App, without any problem.

How can I make it work with the Nexus 7?

Thanks a lot!


问:
How to set CPU frequency as early as possible?
What I mean by this question is the sequence of execution of scripts at boot time.

Suppose I have this line of script:

```<code>echo 307000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq
</code>```

I want this line of script to be executed as soon as possible (even before android shell is loaded). Where is the best place to put it? (init.d?)


问:
Linux kernel 4.4 Android devices
I am trying to find out what all devices are running linux kernel 4.4+ and having a hard time finding all. Till now I could only find Sony Xperia devices running kernel 4.4.

The reason I was trying to get a 4.4 linux device is I am having a hard time compiling kernels based on 3.1x on my ubuntu linux 4.15 so I thought it would be nice to have a linux 4.4 device in that respect. I was trying to compile perf tool for linux right now.

Title: Linux kernel 4.4 Android devices


问:
Google maps makes no sound when interupting music etc
Was there an update to google maps recently that affected this? I made no changes to my phone, and before when I was listening to a podcast using VLC or Samsung Music, google maps voice would just mute the audio and play over it. Now it still mutes the audio but just doesn't give directions, and then my music just picks up afterwards.</p>


问:
Mount encrypted emulated avd userdata-qemu.img.qcow2
I'm trying to make a backup of my AVD. To speed things up, I like to make incremental backups. Backing up the *.img.qcow2 file(s) is inefficient. I'd like to be able to mount the filesystem that resides on the virtual block device and then back up its contents.

My device is an emulated Nexus 5X running the Android Oreo 8.1 x86 system image with Google services and Play Store. There is no option not to full-disk encrypt the userdata partition. Using adbfs is buggy on recent Android versions, not to mention terribly slow.

cryptsetup appears not to know what to do with the block device. Perhaps there's some sort of magic invocation that will expose the underlying ext4 filesystem for me?

```<code>$ file userdata.img
userdata.img: Linux rev 1.0 ext4 filesystem data, UUID=XXXXXX, volume name "data" (extents) (large files)
$ file userdata-qemu.img
userdata-qemu.img: Linux rev 1.0 ext4 filesystem data, UUID=XXXXXX (extents) (large files)
$ file userdata-qemu.img.qcow2
userdata-qemu.img.qcow2: QEMU QCOW Image (v3), has backing file (path userdata-qemu.img), XXXXXX bytes

# qemu-nbd --format qcow2 --connect=/dev/nbd0 userdata-qemu.img.qcow2
# mount -t ext4 /dev/nbd0 /mnt/phone
mount: /mnt/phone: wrong fs type, bad option, bad superblock on /dev/nbd0, missing codepage or helper program, or other error.
</code>```


问:
Is it possible to recover files from Nexus 5 stuck in boot loop?
I have a Nexus 5 that starts up, says "Optimizing apps" and then reboots and repeats this endlessly. I just want to recover my files from the phone. Is there any way to accomplish this through Recovery mode, maybe by mounting the data folder? The only option I have for mounting is "Mount /system" but this doesn't seem to do anything.</p>


问:
How to download a list of all members of WhatsApp group?
I participate in a WhatsApp group and would like to know if it is possible to download a TXT list from all members of this group.</p>


问:
3G icon won't change with Miui themes
I recently upgraded my HTC Incredible's Miui ROM version from 11.20 to 20.21 - I flashed the zip from CWM recovery, wiped cache, and wiped dalvik cache. When it booted up the first time everything was great...but after a restart I noticed the 3G icon/indicator in the status bar had changed from the white-themed, stylized 'Miui look' to the Android stock green look. This change seems to have taken place only in the status bar, not in the notification shade.

For example, here is status bar in its normal state now after the ROM update. It's showing the green stock Android 3G icon that I do not like:

But when I pull the shade down I see the 3G icon that I do like, the icon that was also showing in the status bar before the change (inverted in color, of course):

I tried reinstalling the ROM update (wiped both caches again) but it hasn't changed back. I also tried using Miui's theme engine to reskin the status bar to no avail. The visual discontinuity is small but annoying - how can I get the proper icon back to the status bar? I'd like to avoid a factory reset if possible.

Edit

I've determined that the icon I'm seeing is in fact the stock 3G icon, the one that would display in a Miui ROM without any themes. What I'm looking for is the icon to change when I apply a new theme in Miui, which it is not. Just like in my pictures, though, it is only the 3G icon in the status bar, not in the status bar when the shade is drawn.

Title: 3G icon won't change with Miui themes


问:
Is it possible for the application to execute some code installation time?
Just installed the application X. I never opened it.
Is it possible for X to make some actions (execute some code) installation time, even though I never opened it.

In Windows when you install the app many things may be done. But Android is another beast.


问:
Allow enabling of screen after timeout
I want to allow waking up of the screen either through using the home button or from a screen swipe or a tap on the screen BUT the screen should only wake up after a delay of say 5 seconds.  For example, here is the sequence of events:

screen has gone to sleep

user presses home button (or swipes or taps, whatever is easiest to wake up).

but the screen will not wake up until a set time delay has elapsed.

After time delay has elapsed instant reenabling of the screen is enabled.

Is there a setting or an app for this?

Title: Allow enabling of screen after timeout


问:
How can I use gmail mobile without having to sync
I have a school google account that does not allow sync.

I have just added it to my Android phone and set up gmail, however when I try and get onto the account it asks to sync.

As sync is disabled the sync button will not work. The 3 line setting button just displays Waiting for Sync.

How do I use GMAil on my phone?

I cannot install any other apps since the phone only has 200mb due to the fact that it is a cheap Samsung.


问:
How to fix ADB logcat error?
I want to save logs contains to file:
adb -s xxxxxx logcat -b main > /paths/to/log/file.log

/system/bin/sh: can't create /home/dpi/Desktop/Folder/main.log: No
  such file or directory

Title: How to fix ADB logcat error?


问:
Cannot change mobile network Sony Xperia V
I have a Xperia V device which worked fine until few days ago. I still use 3G SIM, and I've enabled WCDMA(preffered)/GSM from settings menu (Settings->More>Mobile Networks->Network Mode). This works perfectly fine until few days ago. I usually get 3G signal, rarely 2G.

One day suddenly I found that phone with no mobile network connection. I thought maybe something wrong with signal coverage. But it didn't changed even after I changed my location. I has few options in Network Mode menu as follows,

WCDMA only

GSM only

WCDMA(preffered)/GSM

LTE(preffered)WCDMA//GSM

If I choose anything with WCDMA, phone gets disconnected from the carrier and I can only use the option GSM only whyich gets the connection.

I haven't updated or rooted or did anything to the phone recently.

I tried restarting the phone, toggle flight mode , remove and re-insert the sim card but nothing works.

Why can't I connect to WCDMA/3G?

Why am I only able to connect to 2G network?

This happens in every scenario.not on when turn on mobile data connection. I lost signal when I try to connect to any option other than GSM only


问:
Samsung Galaxy J7 Pro 2017 (SM-J730GM) doesn't seem to support partitioned SD cards
I have a Samsung Galaxy J7 Pro SM-J730GM purchased at a Sanborns shop in Mexico, running Telcel's stock ROM, rooted, with TWRP recovery and Link2SD. A couple weeks ago I repartitioned my SD card in order to use Link2SD's app linking function. I remember having to reboot my phone a couple times before it picked up the card, but at the moment I thought it had finally worked. However, apparently it was just a fluke, because today I restarted my phone in order to flash TWRP, and when I started my phone back it didn't detect the card anymore.

The card is fine, as it can be read with no problems on a PC running Linux. The card reader is fine too, as the card is legible from TWRP and can be formatted without a hitch from Android. With that in mind, I tried formatting the card using my device's Set Up function, then I repartitioned it with my computer. When I inserted the repartitioned card, that's where my phone began refusing to mount it.

Has anyone had any luck mounting a partitioned SD card on this model? Am I going to have to flash an aftermarket ROM into my phone?

(PS: I'm going to try to reproduce it with a different card)


问:
How to configure bluebooth dialing behavoir?
I connect a Bluetooth earpiece to my Android phone to allow me to receive calls when driving. By accident, I discovered that if I quickly press the button on my earpiece twice, the phone will automatically re-dials the last outgoing call, which is pretty annoying.

Is this a function of the Bluetooth earpiece, or a function of the phone?

Assuming that it is a function of the phone, how can I configure it so that it re-dials the last call, irrespective of whether it is incoming or outgoing?

I cannot find this function described anywhere in the manuals that come with either the Bluetooth earpiece or the phone. Where can I find more hidden functions where clicking the earpiece button at a predetermined pattern will make the phone do something?

My phone is a Asus Zenfone if it matters.


问:
Backup strategy for non-rooted phone
With apologies for my naivete:

I want, insofar as possible, to periodically back up the data on my non-rooted Samsung Galaxy S8.  To this end I do two things:

1)  I periodically do adb backups with the command

adb backup -all -apk -shared -f backupfile

2)  I mount my phone as a network drive on my Windows machine, where I use robocopy to maintain mirrors of the directories /sdcard and /storage/0000-0000.  These mirrors are updated nightly via a script containing the commands

robocopy z:\sdcard d:\phone /s /z /zb /mir /xx /xo /fft  /r:0 /w:0 /min:10

robocopy z:\storage\0000-0000 d:\phone /s /z /zb /mir /xx /xo /xd mp3s /fft /r:0 /w:0 /min:10

Thanks to Izzy's very helpful answer here, I am aware that some apps store data in directories such as /data/data that are not accessible to me without root access, and also that some apps might have opted out of making their data accessible to the adb backup.

Question 1:  To clarify:  Is the adb backup (at least potentially) capturing at least some data beyond what I'm able to capture in my mirrors?

Question 2:  Is the adb backup restricted to data that has been created by apps?  For example, if I've manually copied a file from my computer to my phone's SD card, is that file included in the adb backup?

Question 3:  Does any of the above strike you as insane, and if so, what strategy would be saner (short of rooting, which I prefer to avoid)?

Title: Backup strategy for non-rooted phone


问:
How to enable mac address filtering in Wi-Fi Access Point on android 8.1?
I can do this by modifying /data/misc/wifi/hostapd.conf directly on android 6.0.1,but android 8.1 always covers it.

Namely,can I run hostapd manually without settiings?I tried this,but looks like  the wifi device is disable:

#hostapd -e /data/misc/wifi/entropy.bin /data/misc/wifi/hostapd.conf exited with code 1,and logcat shows "Could not read interface wlan0 flags: No such device".

How should I enable it?

Wifi is enable in settings:

#ip link show

```1: lo:  mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: bond0:  mtu 1500 qdisc noop state DOWN mode DEFAULT group default
    link/ether **:8d:**:5b:**:fa brd ff:ff:ff:ff:ff:ff
3: dummy0:  mtu 1500 qdisc noqueue state UNKNOWN mode DEFAULT group default
    link/ether **:c8:**:b0:**:c6 brd ff:ff:ff:ff:ff:ff
4: sit0@NONE:  mtu 1480 qdisc noop state DOWN mode DEFAULT group default
    link/sit 0.0.0.0 brd 0.0.0.0
5: rmnet_ipa0:  mtu 2000 qdisc pfifo_fast state UNKNOWN mode DEFAULT group default qlen 1000
    link/[530]
6: rmnet_data0:  mtu 1500 qdisc htb state UNKNOWN mode DEFAULT group default qlen 1000
    link/[530]
7: rmnet_data1:  mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/[530]
and more rmnet_data...
<strong>34: wlan0:  mtu 1500 qdisc mq state UP mode DORMANT group default qlen 3000
    link/ether **:03:**:c2:**:43 brd ff:ff:ff:ff:ff:ff
35: p2p0:  mtu 1500 qdisc mq state DOWN mode DORMANT group default qlen 3000
    link/ether **:03:**:c2:**:43 brd ff:ff:ff:ff:ff:ff
</strong>```

$ls /sys/devices/soc/600000.qcom,pcie/pci0000:00/0000:00:00.0/0000:01:00.0

```broken_parity_status
class
config
consistent_dma_mask_bits
device
devspec
dma_mask_bits
driver
driver_override
enable
<strong>ieee80211</strong>
iommu_group
irq
local_cpulist
local_cpus
modalias
msi_bus
<strong>net</strong>
power
remove
rescan
reset
resource
subsystem
subsystem_device
subsystem_vendor
uevent
vendor```

Wifi is disable in settings:

#ip link show

```1: lo:  mtu 65536 qdisc noqueue
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: bond0:  mtu 1500 qdisc noop
    link/ether **:8d:**:5b:**:fa brd ff:ff:ff:ff:ff:ff
3: dummy0:  mtu 1500 qdisc noqueue
    link/ether **:c8:**:b0:**:c6 brd ff:ff:ff:ff:ff:ff
4: sit0@NONE:  mtu 1480 qdisc noop
    link/sit 0.0.0.0 brd 0.0.0.0
5: rmnet_ipa0:  mtu 2000 qdisc pfifo_fast qlen 1000
    link/[530]
6: rmnet_data0:  mtu 1500 qdisc htb qlen 1000
    link/[530]
7: rmnet_data1:  mtu 1500 qdisc noop qlen 1000
    link/[530]
and more rmnet_data...```

wlan0 is missed.

$ls /sys/devices/soc/600000.qcom,pcie/pci0000:00/0000:00:00.0/0000:01:00.0

```broken_parity_status
class
config
consistent_dma_mask_bits
device
devspec
dma_mask_bits
driver
driver_override
enable
iommu_group
irq
local_cpulist
local_cpus
modalias
msi_bus
power
remove
rescan
reset
resource
subsystem
subsystem_device
subsystem_vendor
uevent
vendor```

net and ieee80211 are missed.


问:
How to make network calls on Android with an app in the background
I am building a react-native app that launches a series of network requests (both UDP, HTTP) when it receives a special kind of notification, or based on a delayed execution.

However it turns out that after the first or second call, it enqueues the calls, without making them. If I open the applications, the remaining network calls are made, and the process continues.

It's a normal issue given that there is a specific doc page inside Android documentation targeting this behaviour:

Excessive Wi-Fi Scanning in the Background

Background Execution Limits

I have read and research over SO: https://stackoverflow.com/questions/40216992/best-place-to-make-network-calls, https://stackoverflow.com/questions/49048434/how-to-make-network-call-from-background-service but those methods did not work to bypass the obstacle. I can require the user to deactivate "battery optimisation" if required, but that did not work either.

I should mention that I am using React Native in order to handle the lifecycle and trigger the network calls, so they are running inside an Activity that is not in the background or when the phone is locked. I believe there should be ways moving things to a) a background thread or b) an Android service.

I really appreciate any response, experience or links that would help me address this problem.


问:
Long wait after flashing
I have a stock image for my tablet, and I am using DragonFace to edit it and PhoenixSuite to flash it.

The stock image flashes fine, and after the flash it immediately reboots (I don't have to do anything).

I can make changes to it via DragonFace and save it as a new img file.  After flashing the new file, sometimes it won't boot at all, sometimes it takes 5 min before it will boot.  I try many button combinations to trigger a boot.

Obviously, it could be a bad img (if I changed something critical) some of the time, but that isn't the case most of the time.  I know this because after a bit of waiting, the device does boot.  If after a few minutes there is no activity, I sometimes reflash the exact same image, and it boots (eventually).

My main question is how to shorten the long delay between flashing and booting.  It is making diagnosing my new image difficult.

Note, I disabled device encryption, and I know that works because the image flashes just fine with that modification (again, after a short wait).

Title: Long wait after flashing


问:
Any way to make a device believe that an app was downloaded from play store?
Is there any way to make a device  believe that an app was downloaded from play store, not having to turn off Unknown sources?</p>


问:
Android auto - non stop notifications
I have been using android auto using car display for more than a year on nexus 5. No problems at all, well except from huge battery drain on Nexus.

Couple of weeks ago updated the phone to Samsung Galaxy s8. Android auto connects and works except for the one part. If I get any notification e.g. on WhatsApp, phone goes in non stop notifications tone. By that I mean, whatever sound phone plays for WhatsApp message notification keeps on playing. I have tried disconnecting phone from android auto, killing all applications. Nothing works. Only recourse is to reboot the phone.

This only happens when phone is connected to android auto display in the car. Otherwise notifications are normal.

On the lighter note, first time this happened, it was almost comic for me. By sheer coincidence I had low fuel signal and WhatsApp message within seconds of each other. Unfortunately, the tone setup for WhatsApp is very similar to car warning. I thought my car has developed some sort of issue and warning me about it and decided to pull over. Only after killing the engine, I discovered that noise was not stopping and found the phone was the actual culprit.

Title: Android auto - non stop notifications


问:
Where is Voice Recorder in Nokia 8?
I really want to know where is Voice Recorder in Nokia 8. If there isn't any Voice Recorder App in Nokia 8, is there an application on the play store which can work specifically for the Nokia 8 unique microphone setup and utilize the Nokia 8 three microphone array?</p>

Title: Where is Voice Recorder in Nokia 8?


问:
How to link an android device (or its account) in a restricted way to my primary google account?
I have an Android powered car multimedia unit that I would like to link somehow to my google's account, so I could send locations from Google maps directly from my PC by clicking the "Send to your phone" button on the location description pane shown in the Google Maps.

At the same time I don't want this device to be logged into this account to prevent any potential data leaks.

Switching between accounts on a PC is not a convenient option.

Is this achievable?


问:
Is it a good idea to give my screen lock PIN to an app?
My online bank created an app which can be used to generate TANs or be used as second authentication factor. For the setup it asks for the screen lock PIN which I've never seen before and seems like a bad idea (the equivalent of running an application not only with sudo, but entering the sudoers password into the application on Linux which I'd never do and alert the distributor of the application about potential malware).

Is this comparsion approximately accurate? And thus the use discouraged, maybe even requiring to take the app down? I could ask the app author, but they'll likely provide a biased argumentation.

I verified with the bank's customer service that it requires the screen lock PIN.

I'm using Lineage OS 14 based on Android 7.1.2 with Google Apps installed.