java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.android.customcounter/com.example.android.customcounter.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.View android.view.ViewGroup.getChildAt(int)' on a null object reference

Stack Overflow | gmavişşş | 5 months ago
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  1. 0

    Is referring to 2 different xml files in a java code possible?

    Stack Overflow | 5 months ago | gmavişşş
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.android.customcounter/com.example.android.customcounter.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.View android.view.ViewGroup.getChildAt(int)' on a null object reference

    Root Cause Analysis

    1. java.lang.NullPointerException

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

      at com.example.android.customcounter.MainActivity.onCreate()
    2. com.example.android
      MainActivity.onCreate
      1. com.example.android.customcounter.MainActivity.onCreate(MainActivity.java:68)
      1 frame
    3. Android Platform
      ActivityThread.performLaunchActivity
      1. android.app.Activity.performCreate(Activity.java:6556)
      2. android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1108)
      3. android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2392)
      3 frames