The new vulnerability [CVE-2021-44228](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-44228) (also known as Log4Shell) is wreaking havoc, but very little of the discussion is voiced about the average android user. Is the average Android OS user at risk? I heard that Java's JNDI is not implemented in Android, but is that referring to the Java editors available for Android or the Android OS itself? Is Android's native logging mechanism that logs all activity in general susceptible to the Log4j vulnerability?

There is an apk that I want to use on my phone. This app relies on a class that is missing from my system installation. I know what this class needs to do, it is very simple, I have written a jar implementing it. How do I install this jar into the system so that the apk can use it?

I know some 'normal' Java (computer Java), and I want to run such a program on my Android device. Is this possible? If yes, how?

I downloaded some 3D games, unzipped them, and got .jar files. How can I use these in Android? I have a Galaxy S running 2.1.

There's an app called Anti-spam: Kaspersky Who Calls . The problem with this app is that when someone calls you the app shows the caller information in a popup and if you don't dismiss the said popup, the phone screen will never turn off. Imagine you got a call and you couldn't answer it, you forget about it and later you realize the whole time the screen has been on and your battery is almost dead. I know there's a thing called "Wake Lock " but it's all alien to me and I've no idea what to look for. I've used decompiler.com and got this but while grepping through the sources I wasn't able to find FLAG_KEEP_SCREEN_ON, so it could have been done differently or this service doesn't decode this flag correctly. I've found this:

public static final long WAKE_LOCK_MAX_ACQUIRE_TIMEOUT_MS = 600000;

    @SuppressLint({"Wakelock"})
    public void run() {
        PowerManager.WakeLock wakeLock;
        if (h(this.f12161a)) {
            this.f12162a.acquire(Constants.WAKE_LOCK_ACQUIRE_TIMEOUT_MILLIS);
        }

It probably results in the screen being on for 10 minutes, not indefinitely but it's also excessive. I wonder if it could be the culprit.

I'm on Android 7.1.2 (Nougat). I have an app that I am trying to pull the exact command /parameters that it is sending to one of my /system/bin apps. It is not in logcat and I haven't been able to find it with strace either. What I'm looking to do is replace the bin file in /system/bin with another file and give it the same name so it logs the command/parameters that's sent to the binary. Is that possible? And is so how? How would I go about getting this info.

I want to install and use Java 8 on Android 4.4. Using Termux is not an option because it requires a minimum of Android 5.0. I do have root access. I tried to install the ARM version of Java using rpm, which worked but it is not usable. When I go to the /bin directory and run ./java -version, it gives me an error ./java: not executable : magic 7F45. Is there a way to install and run Java on a rooted Android phone, without the use of Termux?

I've extracted an apk(react native) with dex2jar and jar to java through jd-qui and also with apktool, and I can view the source code but there is no clue where are the HTTP requests in the source code. When I intercept the apk traffic I can see all the requests to graphql endoint but I cannot see in the source code, where they are triggered or stored. I searched the extracted source code with some keywords such as grahpql endpoint name, and the server address but still no result. And the code seems not obfuscated to me, just some parts are like;

@Metadata(d1 = {"\000\026\n\002\030\002\n\002\020\000\n\000\n\002\020\002\n\000\n\002\030\002\n\000\bf\030\0002\0020\001J\020\020\002\032\0020\0032\006\020\004\032\0020\005H&\006\006"}, d2 = {"Lcom/shopify/arrive/E2EModule;", "", "launch", "", "intent", "Landroid/content/Intent;", "app_release"}, k = 1, mv = {1, 7, 1}, xi = 48)
public interface E2EModule {
  void launch(Intent paramIntent);
}

Is there any way to reach where these requests are triggered or stored on the source code? This is the apk name, com.shopify.arrive

What is the official source for apksigner as referenced e.g. in this [answer](https://android.stackexchange.com/a/218161/375063) ? People are citing Android Studio, Android SDK Build Tools/Platform Tools/Command Line Tools etc. (as well as some shady archives on Google Drive), but non of these contain the program. I've downloaded, installed and searched them all. Alternatively, what is the official source for Android SDK Build Tools 24.0.3, which allegedly contains the apksigner? I've found an apksigner.jar and apksigner.bat inside a private Google [repository](https://dl.google.com/android/repository/build-tools_r24.0.3-windows.zip) , but running apksigner verify --verbose --print-certs apksigner.bat verify --verbose --print-certs apksigner.jar verify --verbose --print-certs doesn't work (no output). This is the content of said batch file apksigner.bat: @echo off REM Copyright (C) 2016 The Android Open Source Project REM REM Licensed under the Apache License, Version 2.0 (the "License"); REM you may not use this file except in compliance with the License. REM You may obtain a copy of the License at REM REM http://www.apache.org/licenses/LICENSE-2.0 REM REM Unless required by applicable law or agreed to in writing, software REM distributed under the License is distributed on an "AS IS" BASIS, REM WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. REM See the License for the specific language governing permissions and REM limitations under the License. REM don't modify the caller's environment setlocal REM Locate apksigner.jar in the directory where apksigner.bat was found and start it. REM Set up prog to be the path of this script, including following symlinks, REM and set up progdir to be the fully-qualified pathname of its directory. set prog=%~f0 rem Check we have a valid Java.exe in the path. set java_exe= if exist "%~dp0..\tools\lib\find_java.bat" call "%~dp0..\tools\lib\find_java.bat" if exist "%~dp0..\..\tools\lib\find_java.bat" call "%~dp0..\..\tools\lib\find_java.bat" if not defined java_exe goto :EOF set jarfile=apksigner.jar set "frameworkdir=%~dp0" rem frameworkdir must not end with a dir sep. set "frameworkdir=%frameworkdir:~0,-1%" if exist "%frameworkdir%\%jarfile%" goto JarFileOk set "frameworkdir=%~dp0lib" if exist "%frameworkdir%\%jarfile%" goto JarFileOk set "frameworkdir=%~dp0..\framework" :JarFileOk set "jarpath=%frameworkdir%\%jarfile%" set javaOpts= set args= REM By default, give apksigner a max heap size of 1 gig and a stack size of 1meg. rem This can be overridden by using "-JXmx..." and "-JXss..." options below. set defaultXmx=-Xmx1024M set defaultXss=-Xss1m REM Capture all arguments that are not -J options. REM Note that when reading the input arguments with %1, the cmd.exe REM automagically converts --name=value arguments into 2 arguments "--name" REM followed by "value". apksigner has been changed to know how to deal with that. set params= :firstArg if [%1]==[] goto endArgs set a=%~1 if [%defaultXmx%]==[] goto notXmx if %a:~0,5% NEQ -JXmx goto notXmx set defaultXmx= :notXmx if [%defaultXss%]==[] goto notXss if %a:~0,5% NEQ -JXss goto notXss set defaultXss= :notXss if %a:~0,2% NEQ -J goto notJ set javaOpts=%javaOpts% -%a:~2% shift /1 goto firstArg :notJ set params=%params% %1 shift /1 goto firstArg :endArgs set javaOpts=%javaOpts% %defaultXmx% %defaultXss% call "%java_exe%" %javaOpts% -Djava.ext.dirs="%frameworkdir%" -jar "%jarpath%" %params% UPDATE: As suggested, I've now tried apksigner from Android Build Tools. Here is the output: Verifies Verified using v1 scheme (JAR signing): true Verified using v2 scheme (APK Signature Scheme v2): true Verified using v3 scheme (APK Signature Scheme v3): false Verified using v4 scheme (APK Signature Scheme v4): false Verified for SourceStamp: false Number of signers: 1 Signer #1 certificate DN: CN=Unknown, OU=Unknown, O=Fiducia IT AG, L=Unknown, ST =Unknown, C=DE Signer #1 certificate SHA-256 digest: 53a6afa8f0d219bba2fe84154f256ecec85b34175f fee5b7387fda0afcc12605 Signer #1 certificate SHA-1 digest: addb5ed43a27660e41acb1d39e85ddd7b9c9807c Signer #1 certificate MD5 digest: 1be8c130e83eb6b36e4aff93bcdd1b28 Signer #1 key algorithm: RSA Signer #1 key size (bits): 2048 Signer #1 public key SHA-256 digest: 671eafb570fa9e82cb7a8d5c435dad3d86990a09d5b 20f41b42e3152b3cd5a6a Signer #1 public key SHA-1 digest: c021e779e6086e20a7c60b05a0c30b94c59c83ba Signer #1 public key MD5 digest: d42dc7a6bcb0ace30d8ac316bc321c9c WARNING: META-INF/androidx.navigation_navigation-fragment.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.camera_camera-camera2.version not protected by signat ure. Unauthorized modifications to this JAR entry will not be detected. Delete o r move the entry outside of META-INF/. WARNING: META-INF/androidx.customview_customview.version not protected by signat ure. Unauthorized modifications to this JAR entry will not be detected. Delete o r move the entry outside of META-INF/. WARNING: META-INF/services/ya.k not protected by signature. Unauthorized modific ations to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.room_room-runtime.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. Delete or mo ve the entry outside of META-INF/. WARNING: META-INF/androidx.camera_camera-lifecycle.version not protected by sign ature. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.browser_browser.version not protected by signature. U nauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/com.google.android.material_material.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. De lete or move the entry outside of META-INF/. WARNING: META-INF/androidx.savedstate_savedstate-ktx.version not protected by si gnature. Unauthorized modifications to this JAR entry will not be detected. Dele te or move the entry outside of META-INF/. WARNING: META-INF/androidx.activity_activity-ktx.version not protected by signat ure. Unauthorized modifications to this JAR entry will not be detected. Delete o r move the entry outside of META-INF/. WARNING: META-INF/kotlinx_coroutines_play_services.version not protected by sign ature. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.slidingpanelayout_slidingpanelayout.version not prote cted by signature. Unauthorized modifications to this JAR entry will not be dete cted. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.dynamicanimation_dynamicanimation.version not protect ed by signature. Unauthorized modifications to this JAR entry will not be detect ed. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.exifinterface_exifinterface.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. De lete or move the entry outside of META-INF/. WARNING: META-INF/androidx.sqlite_sqlite-ktx.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. Delete or mo ve the entry outside of META-INF/. WARNING: META-INF/androidx.lifecycle_lifecycle-extensions.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.versionedparcelable_versionedparcelable.version not p rotected by signature. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.lifecycle_lifecycle-livedata-ktx.version not protecte d by signature. Unauthorized modifications to this JAR entry will not be detecte d. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.preference_preference-ktx.version not protected by si gnature. Unauthorized modifications to this JAR entry will not be detected. Dele te or move the entry outside of META-INF/. WARNING: META-INF/androidx.preference_preference.version not protected by signat ure. Unauthorized modifications to this JAR entry will not be detected. Delete o r move the entry outside of META-INF/. WARNING: META-INF/androidx.navigation_navigation-ui.version not protected by sig nature. Unauthorized modifications to this JAR entry will not be detected. Delet e or move the entry outside of META-INF/. WARNING: META-INF/androidx.lifecycle_lifecycle-runtime.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. De lete or move the entry outside of META-INF/. WARNING: META-INF/androidx.room_room-ktx.version not protected by signature. Una uthorized modifications to this JAR entry will not be detected. Delete or move t he entry outside of META-INF/. WARNING: META-INF/androidx.appcompat_appcompat-resources.version not protected b y signature. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.appcompat_appcompat.version not protected by signatur e. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.lifecycle_lifecycle-livedata.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. D elete or move the entry outside of META-INF/. WARNING: META-INF/androidx.navigation_navigation-runtime.version not protected b y signature. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.navigation_navigation-runtime-ktx.version not protect ed by signature. Unauthorized modifications to this JAR entry will not be detect ed. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.window_window.version not protected by signature. Una uthorized modifications to this JAR entry will not be detected. Delete or move t he entry outside of META-INF/. WARNING: META-INF/androidx.cursoradapter_cursoradapter.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. De lete or move the entry outside of META-INF/. WARNING: META-INF/androidx.savedstate_savedstate.version not protected by signat ure. Unauthorized modifications to this JAR entry will not be detected. Delete o r move the entry outside of META-INF/. WARNING: META-INF/androidx.fragment_fragment.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. Delete or mo ve the entry outside of META-INF/. WARNING: META-INF/androidx.vectordrawable_vectordrawable.version not protected b y signature. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.fragment_fragment-ktx.version not protected by signat ure. Unauthorized modifications to this JAR entry will not be detected. Delete o r move the entry outside of META-INF/. WARNING: META-INF/androidx.sqlite_sqlite-framework.version not protected by sign ature. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.core_core.version not protected by signature. Unautho rized modifications to this JAR entry will not be detected. Delete or move the e ntry outside of META-INF/. WARNING: META-INF/androidx.vectordrawable_vectordrawable-animated.version not pr otected by signature. Unauthorized modifications to this JAR entry will not be d etected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.localbroadcastmanager_localbroadcastmanager.version n ot protected by signature. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.lifecycle_lifecycle-viewmodel-savedstate.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.security_security-crypto.version not protected by sig nature. Unauthorized modifications to this JAR entry will not be detected. Delet e or move the entry outside of META-INF/. WARNING: META-INF/androidx.navigation_navigation-common-ktx.version not protecte d by signature. Unauthorized modifications to this JAR entry will not be detecte d. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.biometric_biometric.version not protected by signatur e. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.lifecycle_lifecycle-livedata-core.version not protect ed by signature. Unauthorized modifications to this JAR entry will not be detect ed. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.navigation_navigation-common.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. D elete or move the entry outside of META-INF/. WARNING: META-INF/kotlinx_coroutines_android.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. Delete or mo ve the entry outside of META-INF/. WARNING: META-INF/androidx.legacy_legacy-support-core-utils.version not protecte d by signature. Unauthorized modifications to this JAR entry will not be detecte d. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.viewpager2_viewpager2.version not protected by signat ure. Unauthorized modifications to this JAR entry will not be detected. Delete o r move the entry outside of META-INF/. WARNING: META-INF/androidx.transition_transition.version not protected by signat ure. Unauthorized modifications to this JAR entry will not be detected. Delete o r move the entry outside of META-INF/. WARNING: META-INF/androidx.print_print.version not protected by signature. Unaut horized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.documentfile_documentfile.version not protected by si gnature. Unauthorized modifications to this JAR entry will not be detected. Dele te or move the entry outside of META-INF/. WARNING: META-INF/androidx.core_core-ktx.version not protected by signature. Una uthorized modifications to this JAR entry will not be detected. Delete or move t he entry outside of META-INF/. WARNING: META-INF/androidx.emoji2_emoji2-views-helper.version not protected by s ignature. Unauthorized modifications to this JAR entry will not be detected. Del ete or move the entry outside of META-INF/. WARNING: META-INF/androidx.recyclerview_recyclerview.version not protected by si gnature. Unauthorized modifications to this JAR entry will not be detected. Dele te or move the entry outside of META-INF/. WARNING: META-INF/androidx.tracing_tracing.version not protected by signature. U nauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.startup_startup-runtime.version not protected by sign ature. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.navigation_navigation-fragment-ktx.version not protec ted by signature. Unauthorized modifications to this JAR entry will not be detec ted. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.lifecycle_lifecycle-livedata-core-ktx.version not pro tected by signature. Unauthorized modifications to this JAR entry will not be de tected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.arch.core_core-runtime.version not protected by signa ture. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.emoji2_emoji2.version not protected by signature. Una uthorized modifications to this JAR entry will not be detected. Delete or move t he entry outside of META-INF/. WARNING: META-INF/androidx.lifecycle_lifecycle-viewmodel-ktx.version not protect ed by signature. Unauthorized modifications to this JAR entry will not be detect ed. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.lifecycle_lifecycle-runtime-ktx.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected . Delete or move the entry outside of META-INF/. WARNING: META-INF/services/ta.z not protected by signature. Unauthorized modific ations to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/INDEX.LIST not protected by signature. Unauthorized modificati ons to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.activity_activity.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. Delete or mo ve the entry outside of META-INF/. WARNING: META-INF/androidx.drawerlayout_drawerlayout.version not protected by si gnature. Unauthorized modifications to this JAR entry will not be detected. Dele te or move the entry outside of META-INF/. WARNING: META-INF/androidx.interpolator_interpolator.version not protected by si gnature. Unauthorized modifications to this JAR entry will not be detected. Dele te or move the entry outside of META-INF/. WARNING: META-INF/com/android/build/gradle/app-metadata.properties not protected by signature. Unauthorized modifications to this JAR entry will not be detected . Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.lifecycle_lifecycle-viewmodel.version not protected b y signature. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.camera_camera-core.version not protected by signature . Unauthorized modifications to this JAR entry will not be detected. Delete or m ove the entry outside of META-INF/. WARNING: META-INF/androidx.swiperefreshlayout_swiperefreshlayout.version not pro tected by signature. Unauthorized modifications to this JAR entry will not be de tected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.lifecycle_lifecycle-service.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. De lete or move the entry outside of META-INF/. WARNING: META-INF/androidx.lifecycle_lifecycle-process.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. De lete or move the entry outside of META-INF/. WARNING: META-INF/androidx.loader_loader.version not protected by signature. Una uthorized modifications to this JAR entry will not be detected. Delete or move t he entry outside of META-INF/. WARNING: META-INF/androidx.viewpager_viewpager.version not protected by signatur e. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.cardview_cardview.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. Delete or mo ve the entry outside of META-INF/. WARNING: META-INF/androidx.navigation_navigation-ui-ktx.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. D elete or move the entry outside of META-INF/. WARNING: META-INF/androidx.coordinatorlayout_coordinatorlayout.version not prote cted by signature. Unauthorized modifications to this JAR entry will not be dete cted. Delete or move the entry outside of META-INF/. WARNING: META-INF/kotlinx_coroutines_core.version not protected by signature. Un authorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.camera_camera-view.version not protected by signature . Unauthorized modifications to this JAR entry will not be detected. Delete or m ove the entry outside of META-INF/. WARNING: META-INF/androidx.annotation_annotation-experimental.version not protec ted by signature. Unauthorized modifications to this JAR entry will not be detec ted. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.sqlite_sqlite.version not protected by signature. Una uthorized modifications to this JAR entry will not be detected. Delete or move t he entry outside of META-INF/. WARNING: META-INF/androidx.core_core-splashscreen.version not protected by signa ture. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. What is the meaning?

I am working on an Android Java application that performs a vulnerability scan of the network where the mobile device is. Since I cannot install any type of vulnerability scan tool on Android I would like to send the vulnerability scan packets from a back-end server (running open-vas) to my android device and then make the android device forward them to the destination hosts inside his network. The easiest way to do that would be to create a VPN Server on the android device, but I don't think it's possible with the VpnService APIs. From what I have found it looks like someone managed to forward traffic with VPN Service: Android VpnService - How to forward intercepted internet traffic . Another idea was to create a sort of packet wrapping: I can wrap the original packet coming from the back-end server inside a standard TCP packet, send it to the android device, unwrap it and forward it to the host inside the device's network. Although I don't know if this would really work in my case for 2 main reasons: 1. I will probably receive RAW packets from the server (since vulnerability scanners forges specific RAW packets for vulnerability testing) and Java does not have any support for manipulating packets 2. Even if I am able to unwrap the packet I will still have a RAW packet to send and from what I have seen Java does not have any support for RAW sockets for security reasons. So do you guys have an idea if there is a way to create a VPN Server on Android to do this remote vulnerability scan? Thanks! PS Maybe rooting the device will give some more alternatives but I am reserving this as last chance.

Is there some tool that can be used in ADB shell or something similar (without root possibly) that can invoke a function in the app, while it is running?

I'm trying to decompile an apk with the apk tools and I'm not getting it. When I run apktool -d myapp.apk it displays this **error** to me: Exception in thread "main" brut.androlib.AndrolibException: Invalid chunk type: expected=0x00000200, got=0x00000203 at brut.androlib.res.decoder.ARSCDecoder.checkChunkType(ARSCDecoder.java:542) at brut.androlib.res.decoder.ARSCDecoder.readTablePackage(ARSCDecoder.java:88) at brut.androlib.res.decoder.ARSCDecoder.readTableHeader(ARSCDecoder.java:82) at brut.androlib.res.decoder.ARSCDecoder.decode(ARSCDecoder.java:48) at brut.androlib.res.AndrolibResources.getResPackagesFromApk(AndrolibResources.java:786) at brut.androlib.res.AndrolibResources.loadMainPkg(AndrolibResources.java:67) at brut.androlib.res.AndrolibResources.getResTable(AndrolibResources.java:59) at brut.androlib.Androlib.getResTable(Androlib.java:66) at brut.androlib.ApkDecoder.setTargetSdkVersion(ApkDecoder.java:236) at brut.androlib.ApkDecoder.decode(ApkDecoder.java:118) at brut.apktool.Main.cmdDecode(Main.java:170) at brut.apktool.Main.main(Main.java:76) Can anyone help me with that? I would offer more reward does not yet

I have a Samsung Galaxy A20s with Android 11 and 2790 MB RAM. The phone was originally designed for Android 9.0 but now that it's been upgraded to 11; it's become slow and my RAM is always almost full and the [Droid Hardware Info](https://play.google.com/store/apps/details?id=com.inkwired.droidinfo) app says my Java Heap is 192 MB. is there any way I could change the heap size? It's way too high for my A20s.

Can i make the google assistant of my android phone to perform custom actions? For example: Ok google. open barrier via "AppName"? I have tried the system actions, but neither one matches my need. So is it doable to create my custom voice action?

I want to make a Tasker script to like the current song in YT MUSIC by holding down volume button for example. The perfect solution is that I can put likes without flashing the screen and silently, so as not to disturb at night. I'm thinking to use the example of Google Assistant, it can give likes to the current track on command. I read the logs and found an event that looks like the right command: A: Media Operation Type: media.SET_RATING sent to package: com.google.android.apps.youtube.music Next I tried to send Intent of this kind, but nothing worked: Send Intent [ Action:android.media.action.SET_RATING Cat:Default Mime Type: Data: Extra: Package:com.google.android.apps.youtube.music Class: Target:Activity ] Continued researching and came across a feature on the developer site : onSetRating(android.support.v4.media.RatingCompat) But I don't know how to use the native functions through Tasker. It may be shell command, Java function or something? Can anyone help?

hello I was wondering whether it would be possible to apply voice changer on GSM Phone call in realtime? If possible, then I'm thinking of using a voice changer mechanism to secure the voice data before being transmitted to the receiver.

After entering the final command to make a mixed-format SD card in [How can I move apps to SD on non-adopted Marshmallow storage?](https://android.stackexchange.com/a/143041/94084) : >$ adb shell sm partition disk:179,64 mixed 25 I meet this error: >Error: java.lang.IllegalStateException: java.util.concurrent.TimeoutException: Thread Binder_C gave up waiting for partitionMixed after 180000ms If it is 75, then the error is: >Error: java.lang.IllegalStateException: java.util.concurrent.TimeoutException: Thread Binder_4 gave up waiting for partitionMixed after 180000ms How can I fix this? Only 3 results appear in Google, and neither of them helps. - **Phone**: Sony Xperia M4 Aqua Dual - **SD card**: SanDisk Ultra micro SDHC UHS-1 Card 16 GB, class 10

pretext: as gmail no longer allows me to send zip files, i have been looking into other ways to get my java source directories from android to laptop and back again, depending whether I'm at home or not (folder hierarchy must be preserved). I have been trying to set up git on my android phone and have been using termux as the command shell to do this. the problem: I am unable to create a directory for which BOTH termux and the java ide have read write access. I have setup storage permissions in termux. If the IDE can write termux can't, and in another location termux can write but the IDE can't. What I need is a folder location that both apps have full read write permissions. (I am not too bothered if these permissions extent to other folders) I do not want to root my device. Nokia 7.2 Android 10

So I developed an application but my hard drive failed and I lost access to project resources, but I had it previously installed on my phone through android studio debugging process. Now I want to extract a raw apk version out of my phone, Is there any way? NOTE that any regular apk extraction through Google Play applications outputs a ~700kb apk of my project that lacks resources and cant be reversed, while it has to be ~4.4mb.

I'm not an Android developer but I do other stuff. I just rooted my phone so I was playing around with a shell and I was trying to compile some C packages and realized there is no C compiler, OK. Surely there must be Java right? Tried it and I can't get a java or javac command to work either. How is that possible when Android apps are written in Java?