Develop Reference

Android release build crash - Doesn't find the shared module from yarn workspaces monorepo

I am using monorepo created using Yarn Workspaces which has a react-native project (mobile folder) and a common folder which contains the common files to be shared across projects. Here the mobile project is dependent on common files.
The Android app runs fine in debug mode. When I run in release mode, it crashes as soon as it opens. I am getting the below error.
E/ReactNativeJS: Invariant Violation: Module AppRegistry is not a registered callable module (calling runApplication). A frequent cause of the error is that the application entry file path is incorrect.
This can also happen when the JS bundle is corrupt or there is an early initialization error when loading React Native.
--------- beginning of crash
2022-06-07 23:48:09.865 5772-5799/? E/AndroidRuntime: FATAL EXCEPTION: mqt_native_modules
Process: com.myapp.mobile, PID: 5772
com.facebook.react.common.JavascriptException: TypeError: t is not a function. (In 't(u)', 't' is undefined), stack:
<unknown>#460:2846
map#-1
<unknown>#460:2825
N#457:7733
<unknown>#455:172
h#2:1585
<unknown>#453:262
h#2:1585
<unknown>#403:148
h#2:1585
<unknown>#6:57
h#2:1585
d#2:958
global code#529:3
at com.facebook.react.modules.core.ExceptionsManagerModule.reportException(ExceptionsManagerModule.java:72)
at java.lang.reflect.Method.invoke(Native Method)
at com.facebook.react.bridge.JavaMethodWrapper.invoke(JavaMethodWrapper.java:372)
at com.facebook.react.bridge.JavaModuleWrapper.invoke(JavaModuleWrapper.java:188)
at com.facebook.react.bridge.queue.NativeRunnable.run(Native Method)
at android.os.Handler.handleCallback(Handler.java:938)
at android.os.Handler.dispatchMessage(Handler.java:99)
at com.facebook.react.bridge.queue.MessageQueueThreadHandler.dispatchMessage(MessageQueueThreadHandler.java:27)
at android.os.Looper.loop(Looper.java:223)
at com.facebook.react.bridge.queue.MessageQueueThreadImpl$4.run(MessageQueueThreadImpl.java:228)
at java.lang.Thread.run(Thread.java:923)
While researching about this, I came across this suggestion and tired it. Found out that the functions which I import from common is causing this error. It is present in node_modules but not sure whether it is getting packed into the bundle or not.
Mobile's package.json:
Any Suggestions?

I think you should change the import flow the way you are importing the package in your package.json file.
See the example below of the react-native-image-crop-picker importing the library in their example code.
And the library code is in the same parent directory.

App crashes when downloaded from Google Play

I've just built and deployed an app to Google Play. It worked well when I was running it through Android Studio but now it crashes when I download it from Google Play. Because this is my first time, I don't even know how to view the crash report/stacktrace of the app that was downloaded from Google Play. I appreciate any and all help.
UPDATE
So I got the stacktrace for the APK. It tells me that my TopImageFragment.java class cannot create my MemeViewModel.java class. I have no clue why its giving this error. Everything works fine as it is. It seems that proguard is indeed phasing out an important class:
2019-04-18 00:46:32.062 8099-8099/? E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.ozbek.onur.memegenerator, PID: 8099
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.ozbek.onur.memegenerator/com.ozbek.onur.memegenerator.MainActivity}: java.lang.RuntimeException: Cannot create an instance of class com.ozbek.onur.memegenerator.MemeViewModel
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2853)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2928)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1609)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6703)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:769)
Caused by: java.lang.RuntimeException: Cannot create an instance of class com.ozbek.onur.memegenerator.MemeViewModel
at android.arch.lifecycle.ViewModelProvider$NewInstanceFactory.create(ViewModelProvider.java:155)
at android.arch.lifecycle.ViewModelProvider$AndroidViewModelFactory.create(ViewModelProvider.java:210)
at android.arch.lifecycle.ViewModelProvider.get(ViewModelProvider.java:134)
at android.arch.lifecycle.ViewModelProvider.get(ViewModelProvider.java:102)
at com.ozbek.onur.memegenerator.TopImageFragment.onActivityCreated(TopImageFragment.java:89)

This kind of problem usually happens because your app deployed to Google Play was a release build and proguard minified your app and removed a class it shouldn't have. When you build in Android Studio it is a debug build that does not get minified. That's why you see the crash only from Google Play.
Before uploading to Google Play, test out your release APK file on a device and watch logcat for the error. That should tell you what class got removed by mistake and you can correct that by specifying custom proguard rules and trying again until the app stops crashing. Then when you upload to Google Play, you should be good.
You can also enable proguard in a debug build as well by changing your build.gradle file. Then when you run through Android Studio, you should see the same error as you see through Google Play.
One other alternative, you can disable proguard/minification in your release build. However this is not recommended because your app will be larger than it needs to be.

Check if you have any java files that don't have an access modifier. In my experience, just declaring a class without a public or private modifier, causes this problem.

My app suffered the same problem and it was a ProGuard kill.
Because ProGuard renames all classes unless otherwise instructed.
So, in your case, you have to add
#Keep
annotation before your class name MemeViewModel.
example,
#Keep
class MemeViewModel{
//
//
}

In my suggestion, keep your phone connected to your your PC/Laptop while you download and attempt to open it. Use Logcat on android studio, it mostly has all answers or at least errors that lead to the answers. try putting error logs here so we can have a proper look at it.
1) Try the same version of your application that you deployed on Google play store by pushing it through the android studio and see if the problem continues!
2) If same thing happens then put breakpoint on the entry point (onCreate method in most cases in MainActivity class) of your application and Go to Run->Debug "YourProject" option and do step by step debug for each command being executed and see which one is causing problem.

Dexguard crashing after library added with native code

After adding a library to project that contains native code (embedded as .so), my app build started to crash when running the dexguard<Flavor><BuildType> task.
The error says:
Caused by: java.io.IOException: Can't read [/home/user/project/app/build/intermediates/transforms/mergeJniLibs/flavor/buildType/folders/2000/1f/main(;;;;;;lib/*/*.so,lib/*/gdb*)] (Can't write resource [lib/x86/filecointainedonlibrary.so] (New string section exceeds the length of the original: 243 > 242))

That might happen when DexGuard obfuscates your native methods.
The latest version 7.1.29 should fix this issue, please give it a try.
Edit: The troubleshooting section of the DexGuard manual describes work-arounds when this happens. They basically keep names of native methods.

Serious issues with Proguard - NoClassDefFoundError

Background
Recently I've updated my app, and for some reason Proguard seem to ruin the code I've made, causing crashes on a very specific case, even though I didn't add any additional libraries.
The reason I'm so sure it's Proguard's fault is that when I tested it without exporting it, it ran fine.
The problem
After seeing the crash reports' stack traces (and seeing that it does occur, by myself), I've ran the "proguardgui" tool and chose to retrace using the mapping file.
Sadly, instead of showing the real places that the code failed, it showed the exact same stack. I've tried to export the project again and use a new mapping file that was created by it, but I still get the same obfuscated stack trace.
Not only that, but the exception itself is very problematic: java.lang.NoClassDefFoundError .
Here's the stack trace, though I don't think it's readable:
java.lang.NoClassDefFoundError: com.lb.app_manager.utils.r
at com.lb.app_manager.utils.e.c(Unknown Source)
at com.lb.app_manager.activities.app_list_activity.AppListActivity.onContextItemSelected(Unknown Source)
at android.app.Activity.onMenuItemSelected(Activity.java:2620)
at android.support.v4.app.FragmentActivity.onMenuItemSelected(Unknown Source)
at com.actionbarsherlock.app.SherlockFragmentActivity.onMenuItemSelected(Unknown Source)
at com.android.internal.policy.impl.PhoneWindow$DialogMenuCallback.onMenuItemSelected(PhoneWindow.java:3864)
at com.android.internal.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:735)
at com.android.internal.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:152)
at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:874)
at com.android.internal.view.menu.MenuDialogHelper.onClick(MenuDialogHelper.java:167)
at com.android.internal.app.AlertController$AlertParams$3.onItemClick(AlertController.java:941)
at android.widget.AdapterView.performItemClick(AdapterView.java:299)
at android.widget.AbsListView.performItemClick(AbsListView.java:1113)
at android.widget.AbsListView$PerformClick.run(AbsListView.java:2904)
at android.widget.AbsListView$3.run(AbsListView.java:3638)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5017)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:133)
at dalvik.system.NativeStart.main(Native Method)
This occurs when I choose to share an app, which, for a very short time should show a progress dialog while running an AsyncTask, and then show a dialog of how you wish to share (just like on the screenshot of the play store link, available here in case you can't see it ).
What I've tried
I've tried to add logs in multiple places, and found out that the AsyncTask runs fine, but it doesn't reach "onPostExecute". I know this since I've put log at the end of "doInBackground" and at the beginning of "onPostExecute" .
This got even weirder, when I removed most of the code of "onPostExecute" and now I have only this:
protected void onPostExecute(final Void result)
{
Log.d("Applog","onPostExecute 0");
super.onPostExecute(result);
Log.d("Applog","onPostExecute 1");
progressDialog.dismiss();
}
It doesn't even reach the first line this way.
In the end, I've decided to merge 2 projects (that I made several versions ago), so that there won't be any Android library project that I made. Only a single one.
I've also removed a library that appears not being used (of Apache commons), but I can't believe this is the cause to the problem (because I didn't use it).
The question
Why do such problems occur?
How can I avoid such a problem in the future?

A NoClassDefFoundError generally points to a problem in the build process: some class that is required doesn't end up in your application.
ProGuard prints out information in the build log about the input jars that it reads and the output jars that it writes. You can also specify
-printconfiguration configuration.txt
to get the complete configuration that ProGuard uses, including input and output. This should help you to find out if all expected input jars are present.
If you are using Eclipse to build your application, you may have run into a synchronization problem that seems to run ProGuard when not all compiled files have been written to disk yet. This mysterious problem has been reported a few times, but it is still unsolved. You should then try Ant or Gradle instead.

Is there a way to make DexGuard exit with an error condition if an error occurs?

I'm currently building an android application using ANT on a Jenkins server.
DexGuard is set to run on release in the custom_rules.xml.
Currently there is an issue when DexGuard tries to convert a method:
[dexguard] Unexpected error while converting:
[dexguard] Class = [o/?]
[dexguard] Method = [?(Ljava/lang/String;)Lo/?;]
[dexguard] Exception = [java.lang.IllegalStateException] (Variable v17 too large for instruction [neg-int v17, v17])
[dexguard] java.lang.IllegalStateException: Variable v17 too large for instruction [neg-int v17, v17]
...
Stack trace
...
[dexguard] Not converting this method
My question is, is there a way to get DexGuard to exit with an error status so that either ANT or Jenkins can mark the build as failed?
At the moment it simply prints the stack trace and continues.
I am currently using the Text-finder plugin for Jenkins as a post build step to match a DexGuard exception. If found it downgrades the build to failed.

DexGuard currently ignores methods that it can't convert from Java bytecode to Dalvik bytecode, for any reason -- notably corrupt input code. In this case, it looks more like a bug in DexGuard itself. We'll fix it as soon as possible, and we'll consider adding a flag to stop with an error status.
(I am the lead developer of ProGuard and DexGuard)