java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.FrameLayout.addView(android.view.View)' on a null object reference

Stack Overflow | Suman Astani | 3 months ago
tip
Do you find the tips below useful? Click on the to mark them and say thanks to rafael . Or join the community to write better ones.
  1. 0
    samebug tip
    When you use findViewById inside an activity it is going to look for a View inside your main_activity.xml. If it's not there, it throws this exception, try to use the right view to call findviewById.
  2. 0
    samebug tip
    This issue was solved in 2.2.6. If updating doesn't solve, try using notifyItemRangeChanged(1, mDatas.size()) instead of notifyItemRangeChanged(0, mDatas.size()).
  3. 0

    Using two camera preview framelayout in same activity.Error in moving from one preview to another

    Stack Overflow | 3 months ago | Suman Astani
    java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.FrameLayout.addView(android.view.View)' on a null object reference
  4. Speed up your debug routine!

    Automated exception search integrated into your IDE

  5. 0
    samebug tip
    This happens when you have android:animateLayoutChanges set to true in your XML file and you call notifyDataSetChanged(). To fix it, you have to set android:animateLayoutChanges to false.
  6. 0
    samebug tip
    This happens as well when you recycle a EditText when it has focus. Try setting android:focusableInTouchMode="true" on your RecycleView.

    Not finding the right solution?
    Take a tour to get the most out of Samebug.

    Tired of useless tips?

    Automated exception search integrated into your IDE

    Root Cause Analysis

    1. java.lang.NullPointerException

      Attempt to invoke virtual method 'void android.widget.FrameLayout.addView(android.view.View)' on a null object reference

      at com.example.simon.cameraapp.MainActivity$2.onClick()
    2. com.example.simon
      MainActivity$2.onClick
      1. com.example.simon.cameraapp.MainActivity$2.onClick(MainActivity.java:65)
      1 frame
    3. Android Platform
      ActivityThread.main
      1. android.view.View.performClick(View.java:5204)
      2. android.view.View$PerformClick.run(View.java:21158)
      3. android.os.Handler.handleCallback(Handler.java:739)
      4. android.os.Handler.dispatchMessage(Handler.java:95)
      5. android.os.Looper.loop(Looper.java:148)
      6. android.app.ActivityThread.main(ActivityThread.java:5461)
      6 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