java.lang.NullPointerException

Stack Overflow | Utkarsh Dubey | 8 months ago
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  1. 0

    java.lang.NullPointerException in Wifi enabling code

    Stack Overflow | 3 years ago | user59053
    java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object android.content.Context.getSystemService(java.lang.String)' on a null object reference 01-01 22:53:40.994: W/System.err(13438): at com.wifiTest.TurnOnWIfiTestAction.turnOnWifi(TurnOnWIfiTestAction.java:18) 01-01 22:53:40.994: W/System.err(13438): at com.post.l_upgrade.MainActivity.wifienable(MainActivity.java:46) 01-01 22:53:40.994: W/System.err(13438): at java.lang.reflect.Method.invoke(Native Method) 01-01 22:53:40.994: W/System.err(13438): at java.lang.reflect.Method.invoke(Method.java:372) 01-01 22:53:40.994: W/System.err(13438): at android.view.View$1.onClick(View.java:3986) 01-01 22:53:41.000: W/System.err(13438): at android.view.View.performClick(View.java:4728) 01-01 22:53:41.000: W/System.err(13438): at android.view.View$PerformClick.run(View.java:19508) 01-01 22:53:41.000: W/System.err(13438): at android.os.Handler.handleCallback(Handler.java:739) 01-01 22:53:41.002: W/System.err(13438): at android.os.Handler.dispatchMessage(Handler.java:95) 01-01 22:53:41.002: W/System.err(13438): at android.os.Looper.loop(Looper.java:135)
  2. 0

    Android Crashing when using a FragmentPagerAdapter

    Stack Overflow | 8 months ago | tom-james
    java.lang.NullPointerException: Attempt to invoke virtual method 'void android.media.MediaPlayer.pause()' on a null object reference at ...ColorsFragment$1.onAudioFocusChange(ColorsFragment.java:26) at ...AudioManager$FocusEventHandlerDelegate$1.handleMessage(AudioManager.java:2147) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:148)
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    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at com.utkarsh.thenewdelhi.Flipper.onClick()
    2. com.utkarsh.thenewdelhi
      Flipper.onClick
      1. com.utkarsh.thenewdelhi.Flipper.onClick(Flipper.java:32)
      1 frame
    3. Android Platform
      ActivityThread.main
      1. android.view.View.performClick(View.java:4438)
      2. android.view.View$PerformClick.run(View.java:18422)
      3. android.os.Handler.handleCallback(Handler.java:733)
      4. android.os.Handler.dispatchMessage(Handler.java:95)
      5. android.os.Looper.loop(Looper.java:136)
      6. android.app.ActivityThread.main(ActivityThread.java:5017)
      6 frames