CODEWITHSUNDEEP
androidandroid-activitylibgdxonresume
tamal.mitra
tamal.mitra

Reputation: 126

Unable to resume activity in libGDX

I am try to develop an application. It has some activities, these are, SplashActivity, MainMenuActivity, and GameActivity.

Now, all three activities extends BaseActivity which also extends AndroidApplication of libgdx.

In SplashActivity and MainMenuActivity, I have written pure android specific code using onCreate, setContentView a layout and etc. I have not write any libgdx code on those activites.

Activity transitions are like this, SplashActivity (it gets finish) -> MainMenuActivity (not get finished) -> GameActivity

On, GameActivity, I setContentView mygame layout, and, write this code:

public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.mygame);

      gbbrdlyot1 = (RelativeLayout) findViewById(R.id.gbbrdlyot1);
      gameBoard = new RelativeLayout(this);
      RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(newBlockWidth, newBlockWidth);
      gameBoard.setLayoutParams(layoutParams);

      View gameView = initializeForView(new GameView(), true);
      gameBoard.addView(gameView);   

        gbbrdlyot1.addView(gameBoard);
}

But I am getting RuntimeException on SplashActivity, I dont know why, 

    05-27 12:56:22.609:  java.lang.RuntimeException: Unable to resume activity com.game.MyGame/com.game.MyGame.SplashActivity}: java.lang.NullPointerException
05-27 12:56:22.609:  at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2124)
05-27 12:56:22.609:  at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2139)
05-27 12:56:22.609: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1672)
05-27 12:56:22.609:    at android.app.ActivityThread.access$1500(ActivityThread.java:117)
05-27 12:56:22.609:    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935)
05-27 12:56:22.609: at android.os.Handler.dispatchMessage(Handler.java:99)
05-27 12:56:22.609: at android.os.Looper.loop(Looper.java:130)
05-27 12:56:22.609: at android.app.ActivityThread.main(ActivityThread.java:3687)
05-27 12:56:22.609: at java.lang.reflect.Method.invokeNative(Native Method)
05-27 12:56:22.609: at java.lang.reflect.Method.invoke(Method.java:507)
05-27 12:56:22.609: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
05-27 12:56:22.609: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
05-27 12:56:22.609: at dalvik.system.NativeStart.main(Native Method)
05-27 12:56:22.609: Caused by: java.lang.NullPointerException
05-27 12:56:22.609: at com.badlogic.gdx.backends.android.AndroidApplication.onResume(AndroidApplication.java:249)
05-27 12:56:22.609: at com.game.MyGame.SplashActivity.onResume(SplashActivity.java:43)
05-27 12:56:22.609: at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1150)
05-27 12:56:22.609: at android.app.Activity.performResume(Activity.java:3832)
05-27 12:56:22.609: at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2114)
05-27 12:56:22.609: ... 12 more

Upvotes: 2

Views: 1411

Answers (1)

P.T.
P.T.

Reputation: 25177

This part of the stack trace:

05-27 12:56:22.609: Caused by: java.lang.NullPointerException
05-27 12:56:22.609: at com.badlogic.gdx.backends.android.AndroidApplication.onResume(AndroidApplication.java:249)
05-27 12:56:22.609: at com.game.MyGame.SplashActivity.onResume(SplashActivity.java:43)

Implies that your SplashActivity extends the Libgdx AndroidApplication. But you wrote:

In SplashActivity, MainMenuActivity, I have written pure android specific code using onCreate, setcontentView a layout and etc. I have not write any libgdx code on that activities.

But, if you're extending AndroidApplication you're getting a bunch of Libgdx code that runs at pause and resume time. But you haven't initialized Libgdx yet (since that seems to happen as a side-effect of your GameActivity's creation.

Keep your pure Android activities pure, and do not extend the Libgdx classes.

Upvotes: 2

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