java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.lang.Object.toString()' on a null object reference

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Root Cause Analysis

  1. java.lang.NullPointerException

    Attempt to invoke virtual method 'java.lang.String java.lang.Object.toString()' on a null object reference

    at android.widget.ArrayAdapter$ArrayFilter.performFiltering()
  2. Android Platform
    HandlerThread.run
    1. android.widget.ArrayAdapter$ArrayFilter.performFiltering(ArrayAdapter.java:480)
    2. android.widget.Filter$RequestHandler.handleMessage(Filter.java:234)
    3. android.os.Handler.dispatchMessage(Handler.java:102)
    4. android.os.Looper.loop(Looper.java:135)
    5. android.os.HandlerThread.run(HandlerThread.java:61)
    5 frames