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

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Root Cause Analysis

  1. java.lang.RuntimeException

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

    at android.os.Handler.<init>()
  2. Android Platform
    Dialog.<init>
    1. android.os.Handler.<init>(Handler.java:200)
    2. android.os.Handler.<init>(Handler.java:114)
    3. android.app.Dialog.<init>(Dialog.java:119)
    4. android.app.Dialog.<init>(Dialog.java:168)
    4 frames
  3. Android v7
    AlertDialog$Builder.show
    1. android.support.v7.app.AppCompatDialog.<init>(AppCompatDialog.java:43)
    2. android.support.v7.app.AlertDialog.<init>(AlertDialog.java:95)
    3. android.support.v7.app.AlertDialog$Builder.create(AlertDialog.java:927)
    4. android.support.v7.app.AlertDialog$Builder.show(AlertDialog.java:952)
    4 frames