Develop Reference

Android crash : /data/user/0/[my app]/cache/WebView is not a directory

Hi I'm in a bit of bind here.
My app doesn't use webview anywhere, and my most frequent crash in Crashlytics is this error : /data/user/0/[myApp]/cache/WebView is not a directory.
The stack trace is minified despite me not using Proguard to minify/obfuscate so it's probably a lib I'm using.
Caused by java.lang.IllegalArgumentException: /data/user/0/[myApp]/cache/WebView is not a directory.
at bHS.<init>(SourceFile:58)
at akR.a(SourceFile:7)
at aoN.call(SourceFile:7)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at aoR.run(SourceFile:2)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)
at java.lang.Thread.run(Thread.java:761)
I'm thinking adMob since it's the only thing that could use a webView or maybe crashlytics itself ?
Has anyone encounter this problem or any lead on how to fix it ?
I tried creating this folder on app startup but it's deleted.

In my case it was that i did not add permissions for internet usage in the manifest:
<uses-permission android:name="android.permission.INTERNET" />

According to this post on the "android-webview-dev" Google Group by a chromium dev:
That looks like a real bug, and it would never show up in our crash reporting because that's crashing in crash handling code.
So it looks like the crash is within Chromium's crash reporting code which... doesn't help you much.
Can you reproduce it at all, or have any users told you how it happened? Additionally, is there any additional information available on Crashlytics (e.g. it only happens on certain Android versions / certain devices)?

Google Drive upload error : "I/O error during system call, Software caused connection abort"

I have developed an Android application using which the user can upload large files (~1 to 2 GB in size) to his/her Google Drive account.
I am using the Google Drive Rest API for Android. Sometimes, the upload operation fails with following exception:
javax.net.ssl.SSLException: Read error: ssl=0xcfe9ee80: I/O error during system call, Software caused connection abort
at com.android.org.conscrypt.NativeCrypto.SSL_read(Native Method)
at com.android.org.conscrypt.OpenSSLSocketImpl$SSLInputStream.read(OpenSSLSocketImpl.java:758)
at com.android.okhttp.okio.Okio$2.read(Okio.java:141)
at com.android.okhttp.okio.AsyncTimeout$2.read(AsyncTimeout.java:211)
at com.android.okhttp.okio.RealBufferedSource.indexOf(RealBufferedSource.java:316)
at com.android.okhttp.okio.RealBufferedSource.indexOf(RealBufferedSource.java:310)
at com.android.okhttp.okio.RealBufferedSource.readUtf8LineStrict(RealBufferedSource.java:206)
at com.android.okhttp.internal.http.HttpConnection.readResponse(HttpConnection.java:239)
at com.android.okhttp.internal.http.HttpTransport.readResponseHeaders(HttpTransport.java:104)
at com.android.okhttp.internal.http.HttpEngine.readNetworkResponse(HttpEngine.java:1156)
at com.android.okhttp.internal.http.HttpEngine.readResponse(HttpEngine.java:976)
at com.android.okhttp.internal.huc.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:509)
at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:438)
at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getResponseCode(HttpURLConnectionImpl.java:567)
at com.android.okhttp.internal.huc.DelegatingHttpsURLConnection.getResponseCode(DelegatingHttpsURLConnection.java:105)
at com.android.okhttp.internal.huc.HttpsURLConnectionImpl.getResponseCode(HttpsURLConnectionImpl.java)
at com.google.api.client.http.javanet.NetHttpResponse.<init>(NetHttpResponse.java:37)
at com.google.api.client.http.javanet.NetHttpRequest.execute(NetHttpRequest.java:94)
at com.google.api.client.http.HttpRequest.execute(HttpRequest.java:981)
at com.google.api.client.googleapis.media.MediaHttpUploader.executeCurrentRequestWithoutGZip(MediaHttpUploader.java:545)
at com.google.api.client.googleapis.media.MediaHttpUploader.resumableUpload(MediaHttpUploader.java:417)
at com.google.api.client.googleapis.media.MediaHttpUploader.upload(MediaHttpUploader.java:336)
at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:427)
at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:352)
at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.execute(AbstractGoogleClientRequest.java:469)
I have following questions:
What are the reasons for such error?
Is this the issue related to network speed?
Is this is the problem with Google Drive API? If yes, how to avoid this error?
I testing the app with Android 7.0.
I would appreciate any suggestions and thoughts on this topic. Thank you.

integrating react native into existing android app

So I have a pretty robust android application and I want to add some code from a react-native only application in one activity. I've gone through the docs on the site and it turned out to be a lot more complicated to integrate a react-native app into an existing android native app. Among the may errors, this is the one I'm current stuck on, does anyone know where this comes from?
java.lang.RuntimeException: An error occurred while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:309)
at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:354)
at java.util.concurrent.FutureTask.setException(FutureTask.java:223)
at java.util.concurrent.FutureTask.run(FutureTask.java:242)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
at java.lang.Thread.run(Thread.java:818)
Caused by: java.lang.NoClassDefFoundError: com.facebook.react.CoreModulesPackage$1
at com.facebook.react.CoreModulesPackage.getNativeModules(CoreModulesPackage.java:96)
at com.facebook.react.LazyReactPackage.createNativeModules(LazyReactPackage.java:71)
at com.facebook.react.NativeModuleRegistryBuilder.processPackage(NativeModuleRegistryBuilder.java:97)
at com.facebook.react.ReactInstanceManager.processPackage(ReactInstanceManager.java:950)
at com.facebook.react.ReactInstanceManager.createReactContext(ReactInstanceManager.java:880)
at com.facebook.react.ReactInstanceManager.access$600(ReactInstanceManager.java:104)
at com.facebook.react.ReactInstanceManager$ReactContextInitAsyncTask.doInBackground(ReactInstanceManager.java:218)
at com.facebook.react.ReactInstanceManager$ReactContextInitAsyncTask.doInBackground(ReactInstanceManager.java:197)
at android.os.AsyncTask$2.call(AsyncTask.java:295)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113) 
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588) 
at java.lang.Thread.run(Thread.java:818) 
It's currently fetching the bundle and it gets to 100 percent but then the activity crashes with the error output above about CoreModulesPackages.
It's been pretty frustrating trying to get this thing up and running, there seems to be a bunch of errors from many sides, I had to import react native manually through an aar since the version on maven is archaic(0.20), download okhttp web socket support, FLog and .so loader stuff. Among also having to exclude architecture specific code. If anyone knows of an easier way to integrate a RN app into an existing codebase, I'd really appreciate it.
I'm coming from the native side trying to understand this thing. I set up npm, bundle up the js before staring the server and then run my app. After which i forward to the proper 8081 port. If I'm doing the sequence of steps wrong then someone please correct me. It's been 3 days. Halp.

I encountered this same error in my react native app on Android 5.x devices -- no issues on 6 or 7.
The issue ceased to occur after I removed Fabric.io Crashlytics as a dependency from my app.

I got same error.
Probles has been solved by properly configuration of multidex for old android
In my case I forgot to inherit my application class from MultiDexApplication

Getting weird Nullpointer Exception ProGuard

Fatal Exception: java.lang.NullPointerException
at com.x.c.l.d(ProGuard:713)
at com.x.c.e.c(ProGuard:161)
at com.x.b.a.a(ProGuard:41)
at com.x.b.a$1.run(ProGuard:646)
at com.x.c.o$1.run(ProGuard:110)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:841)

I think this code was injected by a malware (Xposed etc) or your app was hacked, repackaged and published elsewhere. I receive the same crashes. If you looked into stack traces from other threads you would very likely find there an ad serving code. I did find it, unfortunately.

Identity Toolkit API for android

Im trying to execute the Android Identity Toolkit example from Google: https://github.com/googlesamples/identity-toolkit-android .
But, when I tried to execute the tutorial it gives me the next stack trace:
06-17 12:04:00.450 12306-12339/com.google.identitytoolkit.demo E/GoogleIdpClient﹕ Unrecoverable auth exception: Unknown
com.google.android.gms.auth.GoogleAuthException: Unknown
at com.google.android.gms.auth.GoogleAuthUtil.getToken(Unknown Source)
at com.google.android.gms.auth.GoogleAuthUtil.getToken(Unknown Source)
at com.google.identitytoolkit.idp.google.GoogleIdpClient$1.call(GoogleIdpClient.java:126)
at com.google.identitytoolkit.idp.google.GoogleIdpClient$1.call(GoogleIdpClient.java:120)
at com.google.identitytoolkit.executor.ProgressRequestExecutor$2.doInBackground(ProgressRequestExecutor.java:84)
at com.google.identitytoolkit.executor.ProgressRequestExecutor$2.doInBackground(ProgressRequestExecutor.java:71)
at android.os.AsyncTask$2.call(AsyncTask.java:288)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:841)
06-17 12:04:00.475 12306-12306/com.google.identitytoolkit.demo E/ViewRootImpl﹕ sendUserActionEvent() mView == null
I tried to find some iformation about that exception, but I cant find anything clear, or anything I can use as a solution.
I did all the steps which Google say to do: https://developers.google.com/identity/toolkit/android/quickstart but still not working, probally I did something wrong. Can you help me?

I think, a lot can trigger the exception with so much configuring going on. I got the same exception. For me, the issue is in the AndroidManifest(I got everything right in the developer console configuration).
My first mistake:
android:scheme is given "Client ID for Android" instead of "Client ID for web application"
My next mistake: (I think this one is really causing the unknown exception)
identitytoolkit.server_client_id is given "Key for web applications" instead of, again, "Client ID for web application"(this time without modifying reverse like above)