CODEWITHSUNDEEP
androidlibgdx
Quicklaunch Technology
Quicklaunch Technology

Reputation: 337

libgdx AndroidApplication class

AndroidApplication class extends android activity class, then why it gives following error: 

   06-06 05:47:17.610: E/AndroidRuntime(12567): java.lang.RuntimeException: Unable to resume activity {com.badlogic.drop/com.badlogic.drop.MainActivity}: java.lang.NullPointerException
06-06 05:47:17.610: E/AndroidRuntime(12567):    at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2288)
06-06 05:47:17.610: E/AndroidRuntime(12567):    at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2316)
06-06 05:47:17.610: E/AndroidRuntime(12567):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1836)
06-06 05:47:17.610: E/AndroidRuntime(12567):    at android.app.ActivityThread.access$500(ActivityThread.java:122)
06-06 05:47:17.610: E/AndroidRuntime(12567):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1024)
06-06 05:47:17.610: E/AndroidRuntime(12567):    at android.os.Handler.dispatchMessage(Handler.java:99)
06-06 05:47:17.610: E/AndroidRuntime(12567):    at android.os.Looper.loop(Looper.java:132)
06-06 05:47:17.610: E/AndroidRuntime(12567):    at android.app.ActivityThread.main(ActivityThread.java:4123)
06-06 05:47:17.610: E/AndroidRuntime(12567):    at java.lang.reflect.Method.invokeNative(Native Method)
06-06 05:47:17.610: E/AndroidRuntime(12567):    at java.lang.reflect.Method.invoke(Method.java:491)
06-06 05:47:17.610: E/AndroidRuntime(12567):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
06-06 05:47:17.610: E/AndroidRuntime(12567):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
06-06 05:47:17.610: E/AndroidRuntime(12567):    at dalvik.system.NativeStart.main(Native Method)
06-06 05:47:17.610: E/AndroidRuntime(12567): Caused by: java.lang.NullPointerException
06-06 05:47:17.610: E/AndroidRuntime(12567):    at com.badlogic.gdx.backends.android.AndroidApplication.onResume(AndroidApplication.java:223)
06-06 05:47:17.610: E/AndroidRuntime(12567):    at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1153)
06-06 05:47:17.610: E/AndroidRuntime(12567):    at android.app.Activity.performResume(Activity.java:4468)
06-06 05:47:17.610: E/AndroidRuntime(12567):    at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2278)

I extended MainActivity class to AndroidApplication from Activity , then it gives above error. But when I uncomment follwing commented part, then it works perfectly.Please help to resolve it.

public class MainActivity extends AndroidApplication {


 AndroidApplication app;
 LinearLayout m3d;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

/* AndroidApplicationConfiguration config = new AndroidApplicationConfiguration();
        config.useGL20 = false;
        config.useAccelerometer = false;
        config.useCompass = false;

        m3d = (LinearLayout) findViewById(R.id.m3d);
        View m3dDrop =  initializeForView(new Drop(), config);

        m3d.addView(m3dDrop); */ 

    }


}

Upvotes: 1

Views: 1586

Answers (1)

Steve Blackwell
Steve Blackwell

Reputation: 5924

I would guess it's because you're not calling initializeForView(), which needs to be called in onCreate(). The documentation explains that you need all that commented code.

To resolve, just put the commented code back in. Why did you even take it out?

Upvotes: 2

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