java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.cisystem3.scrolltab/com.example.cisystem3.scrolltab.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.app.ActionBar.setHomeButtonEnabled(boolean)' on a null object reference

Stack Overflow | Pranesh Sahu | 8 months ago
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    Root Cause Analysis

    1. java.lang.RuntimeException

      Unable to start activity ComponentInfo{com.example.cisystem3.scrolltab/com.example.cisystem3.scrolltab.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.app.ActionBar.setHomeButtonEnabled(boolean)' on a null object reference

      at android.app.ActivityThread.performLaunchActivity()
    2. Android Platform
      Handler.dispatchMessage
      1. android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2325)
      2. android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
      3. android.app.ActivityThread.access$800(ActivityThread.java:151)
      4. android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
      5. android.os.Handler.dispatchMessage(Handler.java:102)
      5 frames