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Root Cause Analysis

  1. java.lang.NullPointerException

    Attempt to invoke virtual method 'void android.view.View.setBackgroundResource(int)' on a null object reference

    at android.app.ActivityThread.performLaunchActivity()
  2. Android Platform
    ActivityThread.handleLaunchActivity
    1. android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2426)
    2. android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2490)
    2 frames