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 | 2 weeks ago
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  1. 0

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

    Stack Overflow | 2 weeks ago | Suman Astani
    java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.FrameLayout.addView(android.view.View)' on a null object reference
  2. 0
    samebug tip
    You cannot update your adapter contents in the background. Prepare your data on the background thread and then pass it to the main thread to update the adapter and call notify.
  3. 0
    samebug tip
    Also, you should dispatch events as soon as they happen, ReciclerView already bundles all updates.
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  5. 0

    changing the color of a fragment on a button click

    Stack Overflow | 1 month ago | phoenixshiv
    java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.View.setBackgroundColor(int)' on a null object reference
  6. 0

    I have just written my first android app, and after 3 hours it still doesn't work

    Stack Overflow | 3 years ago | ollie299792458
    java.lang.IllegalStateException: Could not execute method of the activity

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    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