java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.widget.Toolbar.setBackgroundColor(int)' on a null object reference

Stack Overflow | Roy | 1 week ago
  1. 0

    Toolbar come null in Fragment while trying to change colour of it

    Stack Overflow | 1 week ago | Roy
    java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.widget.Toolbar.setBackgroundColor(int)' on a null object reference
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    changing the color of a fragment on a button click

    Stack Overflow | 16 hours ago | phoenixshiv
    java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.View.setBackgroundColor(int)' on a null object reference
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    Open Navigation Drawer with layout on click event

    Stack Overflow | 1 year ago | Marco ShepMonkey De Rossi
    java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v4.widget.DrawerLayout.openDrawer(android.view.View)' on a null object reference
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    How can i fix my null pointer exception

    Stack Overflow | 1 year ago | Dale
    java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ArrayAdapter.add(java.lang.Object)' on a null object reference
  6. 0

    【CrashLog】 LogReport 2016-07-19 01:07:40:93

    GitHub | 6 months ago | wenmingvs
    java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.String.length()' on a null object reference

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    Root Cause Analysis

    1. java.lang.NullPointerException

      Attempt to invoke virtual method 'void android.support.v7.widget.Toolbar.setBackgroundColor(int)' on a null object reference

      at com.example.xinthe.viewpagerdemo.FirstFragment.setToolbarColour()
    2. com.example.xinthe
      MainActivity.onClick
      1. com.example.xinthe.viewpagerdemo.FirstFragment.setToolbarColour(FirstFragment.java:67)
      2. com.example.xinthe.viewpagerdemo.MainActivity.onClick(MainActivity.java:99)
      2 frames
    3. Android Platform
      ActivityThread.main
      1. android.view.View.performClick(View.java:5612)
      2. android.view.View$PerformClick.run(View.java:22285)
      3. android.os.Handler.handleCallback(Handler.java:751)
      4. android.os.Handler.dispatchMessage(Handler.java:95)
      5. android.os.Looper.loop(Looper.java:154)
      6. android.app.ActivityThread.main(ActivityThread.java:6123)
      6 frames
    4. Java RT
      Method.invoke
      1. java.lang.reflect.Method.invoke(Native Method)
      1 frame
    5. Android
      ZygoteInit.main
      1. com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
      2. com.android.internal.os.ZygoteInit.main(ZygoteInit.java:757)
      2 frames