Develop Reference

Crash when using Biometric API on some devices

We use androidx.biometric:biometric:1.0.1 in our application, and on some devices we get an error
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setVisibility(int)' on a null object reference
at androidx.biometric.fingerprintDialogFragment.onCreateDialog(FingerPrintDialogFragment.java:199)
Code on this line is
subtitleView.setVisibility(View.VISIBLE);
How can we solve this problem? We also tried to use alpha release, but problem still available

camera2 api crashing on android 8.1.0

I have used camera2 API to record the video, it is working absolutely fine but having problem only on android 8.1.0
throwing the following exception :
Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'android.hardware.camera2.CaptureRequest android.hardware.camera2.impl.CameraDeviceImpl$CaptureCallbackHolder.getRequest(int)' on a null object reference
at android.hardware.camera2.impl.CameraDeviceImpl$CameraDeviceCallbacks.onResultReceived(CameraDeviceImpl.java:1923)
at android.hardware.camera2.legacy.CameraDeviceUserShim$CameraCallbackThread$CallbackHandler.handleMessage(CameraDeviceUserShim.java:323)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:210)
at android.os.HandlerThread.run(HandlerThread.java:65)

ADAL Android library crash

The app crashes for most of the users after an update from the Play store.
Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equalsIgnoreCase(java.lang.String)' on a null object reference
at com.microsoft.aad.adal.TokenCacheAccessor.isMultipleMRRTsMatchingGivenApp(SourceFile:440)
at com.microsoft.aad.adal.AcquireTokenSilentHandler.tryMRRT(SourceFile:268)
at com.microsoft.aad.adal.AcquireTokenSilentHandler.tryRT(SourceFile:216)
at com.microsoft.aad.adal.AcquireTokenSilentHandler.getAccessToken(SourceFile:114)
at com.microsoft.aad.adal.AcquireTokenRequest.tryAcquireTokenSilentLocally(SourceFile:499)
at com.microsoft.aad.adal.AcquireTokenRequest.acquireTokenSilentFlow(SourceFile:475)
at com.microsoft.aad.adal.AcquireTokenRequest.tryAcquireTokenSilent(SourceFile:379)
at com.microsoft.aad.adal.AcquireTokenRequest.performAcquireTokenRequest(SourceFile:358)
at com.microsoft.aad.adal.AcquireTokenRequest.access$200(SourceFile:57)
at com.microsoft.aad.adal.AcquireTokenRequest$1.run(SourceFile:131)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:919)
ADAL library version - 3.0.2

It's known to the project developers as an error while using proguard/dexguard.
Sample issues:
- ADAL Plugin integration is crashing with proguard/dexguard
- Resiliency fix to not crash: Null Pointer Exception at isMultipleRTsMatchingGivenAppAndResource
- NullPointerException in isMultipleMRRTsMatchingGivenApp

NullPointer on toLowerCase but I don't use that method anywhere

I'm getting the following crash dump in Firebase Crash Reports:
Exception java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.lang.String.toLowerCase(java.util.Locale)' on a null object reference
bnp.run (bnp.java:56)
java.lang.Thread.run (Thread.java:818)
The problem is that I don't use the String.toLowerCase() method anywhere in the project. In Android Studio, I did Edit->Find In Path for the method and got no results, however, it does appear 100+ times if I search in the libraries. But I cannot find the "bnp.java" anywhere.
Thanks for your help!
Edit: A previous crash report was not proguard-affected and revealed it may be due to google-play-services or Firebase. I only use gms:play-services-places and gms:play-services-auth in my app, along with many Firebase dependencies.
Exception java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.lang.String.toLowerCase(java.util.Locale)' on a null object reference
bnp.run (:com.google.android.gms.DynamiteModulesC:56)
java.lang.Thread.run (Thread.java:818)

I can't comment yet, so I will post this as a possible solution, but this seems like an error on Google's side. Multiple people are reporting this crash on the exact same device with the exact same region. So it seems Google runs your app on a virtual or automated device and then that device crashes. This device seems to be a Nexus 5x with local us-US and API level 23.
Source: https://code.google.com/p/android/issues/detail?id=233549

I got this error when my code was trying to create a connection to certain amqp service using an invalid URL. Once I modified it to the proper value, the exception is gone. So check your code.

My app ran into a similar issue.
When launched in Stock android devices(Mi A1), the App crashed with " keeps stopping popup". The Crashlytics in Fabric reported it as the
Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.lang.String.toLowerCase(java.util.Locale)' on a null object reference
at bfx.run(:com.google.android.gms.dynamite_dynamitemodulesc#13452060#13.4.52 (040708-202483333):80)
at java.lang.Thread.run(Thread.java:818)
But when I checked the Pre-launch report of the Release management in Google Play Console, it showed that the app was crashing for Pixel & Pixel 2 for an entirely different reason. The issue shown was
FATAL EXCEPTION: main Process: in.quickall.quickall, PID: 8345
java.lang.RuntimeException: Unable to start activity ComponentInfo{in.quickall.quickall/in.quickall.quickall.Main.MainActivity}: android.content.res.Resources$NotFoundException: Drawable in.quickall.quickall:drawable/splash_screen with resource ID #0x7f0700c0
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2817)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2892)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1593)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6541)
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:767)
And the issue started from the APK version were I implemented the code (given below) to remove the white screen on launch.
<style name="SplashTheme" parent="AppTheme">
<item name="android:windowBackground">#drawable/splash_screen</item>
</style>
I removed this piece of code and now the Pre-launch report shows it as working fine in the Pixel devices.
Now the app launches correctly, but has to have the white screen at launch.

Fabric.io error start Android 2.3.3 (api 10)

I have the following error:
12-03 12:20:08.270 28282-28312/com.topantidevelopers.goloud E/Fabric﹕ Unknown error while loading Crashlytics settings. Crashes will be cached until settings can be retrieved.
java.lang.NullPointerException: Attempt to invoke interface method 'void com.android.okhttp.internal.http.Transport.writeRequestHeaders(com.android.okhttp.Request)' on a null object reference
at com.android.okhttp.internal.http.HttpEngine.readResponse(HttpEngine.java:599)
at com.android.okhttp.internal.http.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:379)
at com.android.okhttp.internal.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:323)
at com.android.okhttp.internal.http.HttpURLConnectionImpl.getHeaderField(HttpURLConnectionImpl.java:152)
at com.android.okhttp.internal.http.DelegatingHttpsURLConnection.getHeaderField(DelegatingHttpsURLConnection.java:190)
at com.android.okhttp.internal.http.HttpsURLConnectionImpl.getHeaderField(HttpsURLConnectionImpl.java:25)
at io.fabric.sdk.android.services.network.HttpRequest.header(HttpRequest.java:1875)
at io.fabric.sdk.android.services.settings.DefaultSettingsSpiCall.invoke(DefaultSettingsSpiCall.java:93)
at io.fabric.sdk.android.services.settings.DefaultSettingsController.loadSettingsData(DefaultSettingsController.java:80)
at io.fabric.sdk.android.services.settings.DefaultSettingsController.loadSettingsData(DefaultSettingsController.java:64)
Also appeared this message at the time of import of libraries:
io-fabric-sdk-android_fabric] Using 1.7 requires compiling with Android 4.4 (KitKat); Currently using API 10
Maybe it's version.
Can someone help me?