java.lang.RuntimeException

Can't create handler inside thread that has not called Looper.prepare()

Samebug tips1

Any worker thread runs in background, since it is not intended to loop, is not connected to a Looper.for example doInBackground(). its implementation returns will be passed to onPostExecute() which runs on the UI thread.

Don't give up yet. Our experts can help. Paste your full stack trace to get a solution.

Solutions on the web18573

  • Can't create handler inside thread that has not called Looper.prepare()
  • via GitHub by alhdo
    , 10 months ago
    Can't create handler inside thread that has not called Looper.prepare()
  • Can't create handler inside thread that has not called Looper.prepare()
  • Stack trace

    • java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare() at android.os.Handler.<init>(Handler.java:200) at android.os.Handler.<init>(Handler.java:114) at android.app.Dialog.<init>(Dialog.java:109) at android.app.Dialog.<init>(Dialog.java:149) at android.support.v7.app.AppCompatDialog.<init>(AppCompatDialog.java:43) at android.support.v7.app.AlertDialog.<init>(AlertDialog.java:95) at android.support.v7.app.AlertDialog$Builder.create(AlertDialog.java:927) at pl.hypeapp.endoscope.StartStreamActivity.logError(StartStreamActivity.java:224) at pl.hypeapp.endoscope.StartStreamActivity.onError(StartStreamActivity.java:168) at net.majorkernelpanic.streaming.rtsp.RtspServer.postError(RtspServer.java:300) at net.majorkernelpanic.streaming.rtsp.RtspServer$WorkerThread.run(RtspServer.java:410)

    Write tip

    You have a different solution? A short tip here would help you and many other users who saw this issue last week.

    Users with the same issue

    5 times, 11 months ago
    Once, 1 year ago
    27 times, 1 week ago
    288 times, 1 month ago
    128 times, 4 months ago
    35 more bugmates