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I am getting following stack on after sending first message to helpshift. I am very new to android and do not understand how to debug this. Also this crash happens one in 5 times so I am not sure how to reproduce n fix it.

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java.lang.RuntimeException: An error occured while executing doInBackground()
1   
at android.os.AsyncTask$3.done(AsyncTask.java:300)
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at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
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at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
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at java.util.concurrent.FutureTask.run(FutureTask.java:242)
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at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
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at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
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at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
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at java.lang.Thread.run(Thread.java:818)
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Caused by: java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
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at android.os.Handler.<init>(Handler.java:200)
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at android.os.Handler.<init>(Handler.java:114)
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at com.helpshift.HSApiData.updateUAToken(SourceFile:1260)
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at com.helpshift.Helpshift.registerDeviceToken(SourceFile:641)
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at notifications.GCMRegisterCheck$RegisteringHelpShiftWithToken.doInBackground(SourceFile:337)
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at notifications.GCMRegisterCheck$RegisteringHelpShiftWithToken.doInBackground(SourceFile:331)
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at android.os.AsyncTask$2.call(AsyncTask.java:288)
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at java.util.concurrent.FutureTask.run(FutureTask.java:237)
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... 4 more
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java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
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at android.os.Handler.<init>(Handler.java:200)
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at android.os.Handler.<init>(Handler.java:114)
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at com.helpshift.HSApiData.updateUAToken(SourceFile:1260)
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at com.helpshift.Helpshift.registerDeviceToken(SourceFile:641)
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at notifications.GCMRegisterCheck$RegisteringHelpShiftWithToken.doInBackground(SourceFile:337)
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at notifications.GCMRegisterCheck$RegisteringHelpShiftWithToken.doInBackground(SourceFile:331)
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at android.os.AsyncTask$2.call(AsyncTask.java:288)
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at java.util.concurrent.FutureTask.run(FutureTask.java:237)
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at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
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at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
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at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
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at java.lang.Thread.run(Thread.java:818)
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1 Answers1

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This crash is occurring because the call is happening from a thread which does not contain an associated looper. To stop this crash :

  1. Create a handler thread.
  2. Use the looper of the above handler thread and create a register handler.
  3. Make the API call inside the register handler.

Inside your async task -

@Override
protected Void doInBackground(Void... voids) {
   HandlerThread handlerThread = new HandlerThread("register-device-token");
   handlerThread.start();
   new RegisterDeviceTokenHandler(handlerThread.getLooper(), context).post(null);
   return null;
}

Your register device token handler -

private static class RegisterDeviceTokenHandler extends Handler {

    private final Context context;

    public RegisterDeviceTokenHandler(Looper looper, Context context) {
        super(looper);
        this.context = context;
    }

    @Override
    public void handleMessage(Message msg) {
        Helpshift.registerDeviceToken(context, "hello");
    }
}

For any other queries, feel free to contact us at support@helpshift.com

daniel-helpshift
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