java.lang.RuntimeException: Unable to start activity ComponentInfo{com.domain.appname/com.domain.appname.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void com.domain.appname.NavigationDrawerFragment.setUp(int, android.support.v4.widget.DrawerLayout)' on a null object reference

Stack Overflow | Keith | 6 months ago
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    Stack Overflow | 6 months ago | Keith
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    stackoverflow.com | 1 year ago
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    openclassrooms.com | 1 year ago
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    Root Cause Analysis

    1. java.lang.NullPointerException

      Attempt to invoke virtual method 'void com.domain.appname.NavigationDrawerFragment.setUp(int, android.support.v4.widget.DrawerLayout)' on a null object reference

      at com.domain.appname.MainActivity.onCreate()
    2. com.domain.appname
      MainActivity.onCreate
      1. com.domain.appname.MainActivity.onCreate(MainActivity.java:40)
      1 frame
    3. Android Platform
      ActivityThread.performLaunchActivity
      1. android.app.Activity.performCreate(Activity.java:6056)
      2. android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
      3. android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2332)
      3 frames