java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setText(java.lang.CharSequence)' on a null object reference

Stack Overflow | Runkun Miao | 7 months ago
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    Getting nullPointerException even when my IDs in Main Activity are right

    Stack Overflow | 7 months ago | Runkun Miao
    java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setText(java.lang.CharSequence)' on a null object reference

    Root Cause Analysis

    1. java.lang.NullPointerException

      Attempt to invoke virtual method 'void android.widget.TextView.setText(java.lang.CharSequence)' on a null object reference

      at com.example.miaor.stormyprofessional.UI.MainActivity$override.updateDisplay()
    2. com.example.miaor
      MainActivity$1$1.run
      1. com.example.miaor.stormyprofessional.UI.MainActivity$override.updateDisplay(MainActivity.java:112)
      2. com.example.miaor.stormyprofessional.UI.MainActivity$override.static$access$200(MainActivity.java:32)
      3. com.example.miaor.stormyprofessional.UI.MainActivity$override.access$dispatch(MainActivity.java)
      4. com.example.miaor.stormyprofessional.UI.MainActivity.access$200(MainActivity.java:0)
      5. com.example.miaor.stormyprofessional.UI.MainActivity$1$1$override.run(MainActivity.java:89)
      6. com.example.miaor.stormyprofessional.UI.MainActivity$1$1$override.access$dispatch(MainActivity.java)
      7. com.example.miaor.stormyprofessional.UI.MainActivity$1$1.run(MainActivity.java:0)
      7 frames
    3. Android Platform
      ActivityThread.main
      1. android.os.Handler.handleCallback(Handler.java:739)
      2. android.os.Handler.dispatchMessage(Handler.java:95)
      3. android.os.Looper.loop(Looper.java:148)
      4. android.app.ActivityThread.main(ActivityThread.java:5417)
      4 frames
    4. Java RT
      Method.invoke
      1. java.lang.reflect.Method.invoke(Native Method)
      1 frame
    5. Android
      ZygoteInit.main
      1. com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
      2. com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
      2 frames