I have Android 9 in my phone and have WhatsApp version 2.19.258 installed on it. Now, I wish to hide/change the display picture of a certain contact, say Mr. Alex on my phone. How do I go about doing it?

Using MagiskHide against all Google services and clearing data, I restored the widevine L1 level in the DRM info app. But now, all the video services that are widevine L1 only idle when attempting to play a video instead of properly showing an error message (so it’s don’t work). As far I understand, videos decryptions keys are erased from the trusted keystore of the cpu in case the firmware is tampered. If this is true, how to restore them ? If not, how to access apps that require widevine L1 access (not accepting widevine L3) ? I’m asking this because several post across the Internet emerged in claiming on how to restore widevine L1 and by following them the device is again signaling the compatibility with L1 but doesn’t seem to support it again in reality.

I am wondering if there is a method by which I can designate a WLAN/WiFi connection as "mobile network" based on its SSID for the sake of data usage policies by apps or the Android system in general. Typically, when you have a data plan with your mobile provider, your phone's LTE (or 3G) modem will connect to the provider to enable you to have internet access. Now, if I am using a mobile LTE/WLAN router instead, my phone assumes that it's on an unmetered WiFi uplink and apps/the system will (mis)behave accordingly. Is there a way to tell the system that when it connects to a particular SSID, it should treat that as "mobile network" in regards to how apps may use data? Phone: Samsung Galaxy S9+ (SM-G965F), Android 9 NB: the settings from this answer don't exist on my phone.

How can I undo an edit in Gmail's compose field? For example, I write a draft email, select the entire text and remove it, how can I undo my remove action to get the text back?

I bought a cheap Blackview BV5900 running on Android 9.0 (I assume a custom ROM) as I needed something rugged and with long battery life for testing purposes. I'm struggling to find any answers as to why apps won't auto start when they are supposed to. The app in question primarily is Grandstream Wave - Video which is effectively a SIP client. It auto starts just fine on an old Samsung Galaxy V6. I've tried various auto-start apps to see if I could get around it, but it would seem they fail to load as well on boot, so they don't do the task they are intended to perform. I've been in contact with the manufacturer and their answer is it just won't do it. As it's a test phone I'm quite happy to root it, although I'm completely new to Android, I'm sure I'll find enough info to get started with a bit of googling. What I'm after is a bit of help on what to look for and how to find it. From what I gather, the app is looking for a BOOT_COMPLETE message of some sort, so I'm guessing that is disabled somewhere? Any answers, please assume I know nothing, you will be correct. **EDIT 11May2020** Tried the shell command as requested [here](https://android.stackexchange.com/a/224547/322004) - no Joy. Result from shell below. Not sure whether this just means I don't have enough privilege to run it or it's disabled in some way?

Broadcasting: Intent { act=android.intent.action.BOOT_COMPLETED flg=0x400000 pkg=com.grandstream.wave }
Security exception: Permission Denial: not allowed to send broadcast android.intent.action.BOOT_COMPLETED from pid=5834, uid=2000

java.lang.SecurityException: Permission Denial: not allowed to send broadcast android.intent.action.BOOT_COMPLETED from pid=5834, uid=2000
    at com.android.server.am.ActivityManagerService.broadcastIntentLocked(ActivityManagerService.java:21774)
    at com.android.server.am.ActivityManagerService.broadcastIntent(ActivityManagerService.java:22411)
    at com.android.server.am.ActivityManagerShellCommand.runSendBroadcast(ActivityManagerShellCommand.java:690)
    at com.android.server.am.ActivityManagerShellCommand.onCommand(ActivityManagerShellCommand.java:174)
    at android.os.ShellCommand.exec(ShellCommand.java:103)
    at com.android.server.am.ActivityManagerService.onShellCommand(ActivityManagerService.java:16434)
    at android.os.Binder.shellCommand(Binder.java:634) at android.os.Binder.onTransact(Binder.java:532)
    at android.app.IActivityManager$Stub.onTransact(IActivityManager.java:3551)
    at com.android.server.am.ActivityManagerService.onTransact(ActivityManagerService.java:3397)
    at android.os.Binder.execTransact(Binder.java:731)

I have a Huawei P20 Lite with Android 9, EMUI 9.1.0 and WhatsApp 2.19.253, which is the latest version. As I wrote in the title, I can't receive WhatsApp messages, after many hours of researching I didn't find any solution for my problem. This is the first time I face whit this problem, because I managed and configured variues P20 Lite but none of them gave me that headache. The things which I did: * Turn on every single option for WhatsApp's notifications; * Uninstall the application and install it again; * Remove the app from the battery optimization process; * Clear the cache; * Enabled automatic start, secondary start and running in background, following this steps Settings -> Battery -> app launch -> 3 vertical dots -> manage manually; * No limit for internet traffic and allow background data, following Settings -> networks and wireless -> data usage -> select WhatsApp -> enabled the varius option. Any idea or solution for this problem? EDIT When I send a message from my phone to this P20 Lite, on the message appears only 1 tick, such as the P20 is disconnected from wifi/mobile data, but the wifi is enabled and connected, the same behaviour with mobile data.

I have connected an external SD card via a USB connector to my phone in order to have more space for recording video. However, Google Photos does not seem to recognize it - it does not show up in Device Folders, and I cannot figure out how to make it show up. In this [support thread](https://support.google.com/photos/thread/120725?msgid=121716) from last year it is stated that "if the device is running Android 6.0 and above then the external SD card may be merged into internal memory and in this case it will backup all of your photos including your SD card." I am running Android 9, and 9 > 6, so this should work. When I check if the SD card is merged with internal it is marked as "Portable storage," meaning that the SD card is set as external storage. However, it goes on to say that "you should have received a pop-up notification when the external SD card was detected. The notification gives you 2 options: Eject or Setup." The notification does not give me the option to "Setup", instead it only gives me the option to "Explore". That brings up some kind of file explorer from which I cannot find any options to merge storage. It goes in to say that you can "choose which folders on your phone to back up" by "Select Settings > Back up & sync. Touch "Choose folders to back up..." and select the folders you want to back up." But in the "Back up & sync" part of Google Photos, there is no "Choose folders to back up..." The closest I can see if "Back up device folders" which takes me to a list of already discovered folders, which does not include the SD card. How do I get Photos to recognize the external USB drive?

Samsung Galaxy Note 9 running on Android 9 stores all old clipboard entries which requires me to manually delete it every time. [ How can I opt-out of this "feature"?

I know of the method of using adb logcat to receive logs from an Android device. However, the logs I receive are, at best, only 1 hour old. I need the logs for the whole day, however. Is there a way for getting the logs of the whole day, or am I restricted to this?

I have my phone rooted with magisk and am running a ROM based on Android Pie, which doesn't come with GApps, and therefore has builtin apps to do stuff, my interest is in the gallery app. I configured OpenGApps to not install Google Photos, and preserve the existing gallery app instead. I would like to take a backup of it so I can use it anywhere in the future, however the obvious way fails: ES File Explorer doesn't even see it, Lucky Patcher doesn't allow .apk backups of system apps, and I went into the directories manually only to find the lib folder outside the .apk. Am I safe to just copy the .apk and ignore the lib folder, or is there any other way I can try? Thank you for your time. Note: I would like the app saved as a single "normal" .apk file, instead of having the lib folder outside and having to carry that around, plus I wouldn't be able to place it if I didn't have root (for example, a new phone).

I am trying to install an APK that contains armeabi-v7a native libraries, on an emulator with KVM enabled. When I try to install the APK on to the running device, I am facing this error: Failure [INSTALL_FAILED_NO_MATCHING_ABIS: Failed to extract native libraries, res=-113] As per https://developer.android.com/studio/releases/emulator#30-0-0 , the error above shouldn't occur on Android 9 or 11 > ### Android 11 system images > > You can now create an AVD that runs Android 11 by selecting either of the available API level 30 system images: > > - x86: Includes both x86 and ARMv7 ABIs. > - x86_64: Includes x86, x86_64, ARMv7 and ARM64 ABIs. > > ### Support for ARM binaries on Android 9 and 11 system images > > If you were previously unable to use the Android Emulator because your app depended on ARM binaries, you can now use the Android 9 x86 system image or any Android 11 system image to run your app – it is no longer necessary to download a specific system image to run ARM binaries. These Android 9 and Android 11 system images support ARM by default and provide dramatically improved performance when compared to those with full ARM emulation. My environment is Ubuntu 18.04 (LTS). Here are some of my setup commands: tools https://dl.google.com/android/repository/commandlinetools-linux-6200805_latest.zip sdkmanager --install "system-images;android-28;default;x86" "emulator" "platform-tools" "platforms;android-28" (at this step feel free to replace x86 with x86_64) Note I have tried with google-apis/playstore services and it allows the installation but fails at runtime. avdmanager create avd -n "x86" -k "system-images;android-28;default;x86" (same steps of replacement apply) `emulator @x86 -no-boot-anim -noaudio -no-window -verbose -wipe-data -partition-size 1024 -qemu -enable-kvm Is it something I'm missing? editing the build.prop file doesn't help.

I'm attempting to install Android x86 from https://www.fosshub.com/Android-x86.html following the steps on https://hackmd.io/@StanS/Android-x86 , and after getting to the point where I can reboot and boot into the OS, I go to edit the boot command for step 4. I hit e twice, but then I can't change the boot command. It just gives me a line with out the string that I need to edit. on the previous page, it has the string listed, but everything I search for just says it should be there.

I have a OnePlus 3T, and recently updated it to LineageOS 16, from 15.1 - however I imagine this applies to any device with Android 9. I realise that Android 9 has changed the default behaviour of the volume keys, to adjust the media volume by default. Whilst I can appreciate that some users might find this useful, I much preferred the ringer volume being changed by default and the media volume changing when media was being played. It seems like now there is no way to change the ringer volume using the hardware keys. Is there any way to undo this change in defaults and make the volume keys adjust the ringer volume by default? Essentially I want to do the *opposite* of this question . Ideally I'd like not to have to install some questionable app to do it, I have root access so can use that if there's some command that I can change. Or at the very least, is there a way to stop the ringtone from playing when I change volume from the "Sound" setting menu? Typically when I am changing the ringer volume I'm trying to reduce the amount of noise I might make, but changing the ringer volume through the "Sound" menu causes Android start playing my ringtone, which is very annoying.

Phone (Make, Model): Cherry Mobile Flare S8 Pro Android Version / ROM Name: Android 9 Root: No Unlocked Bootloader: No Issue: While I was browsing on Kiwi Browser as always and changing between apps, my phone just lagged. I tried to press the home screen during the lag but all my apps on the home screen seem to have disappeared, including the clock and other widgets. It's an empty screen with only the wallpaper. Every few seconds, the apps on the home screen will show but after a few seconds, it will disappear again. When the apps on the home screen show, I can't press or tap any of them. Every time I do that, the home screen disappears again. I restarted multiple times and even tried to reboot in safe mode but to no avail. It's still the same thing. I uninstalled a random app in safe mode to see if it works but nothing happened, the issue is still there. However, I managed to find a way to access the apps by pulling the top bar and pressing the settings button, going to the apps, and then clicking on "downloaded from Google Play" which opens the Google Play Store. This allows me to open and use any apps downloaded from the Play Store. However, this means I cannot open them unless I try to update them first. When I tried to normal boot after uninstalling the first app I saw in the safe mode, crazy stuff happened. My home screen suddenly turned messy and the arrangement became chaotic. (It was supposed to be three rows of app folders.) I tried to open the apps on the home screen but instead of the app opening, the tiny buttons below which show the number of swipe pages on the home screen increased explosively, which can be seen in the second image. I don't really know what to do here, I don't want to factory reset and lose everything. I'm too broke to afford any phone repair either. So it would be highly appreciated if I could get some help. I took a 34-second video recording that shows the broken home screen here: https://streamable.com/rnpip9

I am running Android One 9 on a Xiaomi Mi A3 and am trying to stop it from using IPv6 DNS servers, as they are essentially turning my RPI4 running Pi-Hole into a useless lump of silicon. How can I do this without having the phone ignore my instructions?? I have tried setting the WiFi connection to use a static IP and DNS info, as well as both the sudo sysctl -w net.ipv6.conf.wlan0.disable_ipv6=1 and the older echo 1 > /proc/sys/net/ipv6/conf/wlan0/disable_ipv6 commands but to no avail...the file retains the value 0 and my phone insists on using one IPv4 and one IPv6 DNS server no matter what I try! Please help me end this madness! MTIA :-)

I have an Itel A56 running Android 9 (Go edition) and I decided to install an auto clicker app to help automate some things. I finished downloading the app and it asks me to enable accessibility and I do, but when I go back to the app, it tells me that I have to enable accessibility. I go back to settings and the accessibility is still on for the app. I thought maybe it was a mistake or something, so I put it off and on again, but the app still tells me I need to enable accessibility. I tried putting it off and on many times, and it still wouldn't work. It's as if the app doesn't know its accessibility is enabled. What is happening and how to fix it?

I have read [this question](https://android.stackexchange.com/questions/205042/is-there-a-way-to-completely-disable-all-bixby-functionality-without-rooting-the) and realised that it is outdated. With the most recent android update for my Galaxy S9, I have no way to disable the Bixby button out of the box. Previously I had to sign in to Bixby, Then go to setting and disable the button there. Afterwards I could remove the samsung account and had no issues at all. **How can I get rid of Bixby/disable the bixby button without rooting the device?** --- Software update: G960FXXU2CSB9/G960FOXM2CSB3/G960FXXU2CSB3 Android version: 9 Security Patch: 2019-02-01 Bixby Home Version 3.0.02.6 Bixby Voice Version 2.1.04.18

I know, this is a decades old question, answered on million sites, still none of this Q/A's match my case: I regularly have to delete the storage of the gmail app on my android (9.0-pie) device in order to regain automatic syncing of incoming emails. The internal storage is about 42% full (of 64Gb), the SD-card is 20% occupied (of 128Gb, although this is irrelevant I think), the gmail apps data storage is slightly above 64Mb (right now). In such cases neither restarting of the device, nor updating the gmail app, nor deleting the app's cached data does not help, only deleting the app's occupied storage, which does not seem to be too much (64Mb is next to nothing) to mean a real limitation. Any idea please ?

This question is an [extension of this question where I want to perform the nfc checking part at the embassy](https://android.stackexchange.com/q/251982) . Which files do I need to change in the filesystem using root so I can download apps marked as incompatible on the Google Play Store because my phone lack nfc sensors ?

In order to get a specific visa, I need to verify my ɪᴅ using a government official app. I went on the play store and it first showed as not being compatible [because it requires ɴꜰᴄ which my phone doesn’t have](https://android.stackexchange.com/q/251483/87784) . So I manually downloaded the app and obtained an xapk because the single app consists of several .apk. So far no problems using adb install-multiple. I then launched that app to verify my ɪᴅ and then the app complained it wasn’t installed from the Google’s play store. The solution to this situation is normally to simply install the apk using pm -i com.android.vending apk. But how do that when the same app ɪᴅ consist of several .apk ? Please also note it uses com.android.vending.CHECK_LICENSE for the same purpose so that setting the installer after isn’t enough.