Ausnahme von Android-Null Zeiger nach Onresume in der Spielschleife

Question

Ich arbeite an einem Android -Spiel. Ich war das gleiche Problem wie hier

Ich habe das Warten ausprobiert und alle Lösung wie gezeigt benachrichtigt. Aber sobald die App wieder aufgenommen wird, bekomme ich die Ausnahme von Nullzeiger. Hier ist die Log Cat -Info.

INFO/System.out(8166): on resume
INFO/System.out(8166): !!!! IN THE GAME RESUME ---- >>> 
INFO/System.out(8166):  SURFACE CREATED
INFO/System.out(8166): thread on resume
INFO/System.out(8166): in thread game pause=true
WARN/dalvikvm(8166): threadid=7: thread exiting with uncaught exception (group=0x4001d800)
ERROR/AndroidRuntime(8166): FATAL EXCEPTION: Thread-11
ERROR/AndroidRuntime(8166): java.lang.NullPointerException
ERROR/AndroidRuntime(8166):     at com.org.GummyBlast.GameView.onDraw(GameView.java:442)
ERROR/AndroidRuntime(8166):     at com.org.GummyBlast.GameLoopThread.run(GameLoopThread.java:88)

Der Code in Onsurfacecreated und OneSurfacationStroyed

private void init() {

    gameLoopThread = new GameLoopThread(this);
    holder = getHolder();
    holder.addCallback(new SurfaceHolder.Callback() {

        @Override
        public void surfaceDestroyed(SurfaceHolder holder) {
            System.out.println(" SURFACE DESTROYED");

            nullImages();
            boolean retry = true;

            //gameLoopThread.setRunning(false);
            if(!mGameIsRunning){
            while (retry) {
                try {
                    gameLoopThread.join();

                    retry = false;
                } catch (InterruptedException e) {
                }
            }
        }


    }

        @Override
        public void surfaceCreated(SurfaceHolder holder) {
            System.out.println(" SURFACE CREATED");
            Log.d("surface create", "SURFACE CREATED");

            /*gameLoopThread.setRunning(true);

            gameLoopThread.start();*/
            start(holder);

        }

        public void start(SurfaceHolder holder) {
            if (!mGameIsRunning) {

                gameLoopThread.setRunning(true);
                gameLoopThread.start();
                mGameIsRunning = true;
            } else {

                gameLoopThread.onResume();
            }
        }

Code in meiner Gamethread -Klasse

public class GameLoopThread extends Thread {
static final long FPS = 10;
private  GameView view;
public static boolean running = false;
public static boolean run = true;
public static boolean game_pause=true;
 private static Object mPauseLock;
 private boolean mFinished=false;
 long ticksPS = 1000 / FPS;
    long startTime;
    long sleepTime;
 SurfaceHolder holder;
public GameLoopThread(GameView view) {
     mPauseLock = new Object();

    this.view = view;
}

public GameLoopThread() {
     mPauseLock = new Object();
}


public void setRunning(boolean run) {
    running = run;
}




@Override
public void run() {
    while (running) {
        // Do stuff.
        System.out.println("in thread game pause="+Boolean.toString(game_pause));
        if (game_pause == true) {
            Canvas c = null;
            startTime = System.currentTimeMillis();
            try {
                c = view.getHolder().lockCanvas();
                synchronized (view.getHolder()) {
                    view.onDraw(c);

                }

            } finally {
                if (c != null) {
                    view.getHolder().unlockCanvasAndPost(c);
                }
            }

            sleepTime = ticksPS - (System.currentTimeMillis() - startTime);
            try {
                if (sleepTime > 0)
                    sleep(sleepTime);
                else
                    sleep(10);
            } catch (Exception e) {
                System.out.println("Error in game loop thread "+ e.getMessage());

            }
        }
        else{
        synchronized (mPauseLock) {
            while (game_pause==false) {
                try {
                    mPauseLock.wait();
                } catch (InterruptedException e) {
                }
            }
        }
        } 
    }
}
public void onPause() {
    synchronized (mPauseLock) {
        game_pause = false;
        System.out.println("thread on pause");
    }
}

/**
 * Call this on resume.
 */
public void onResume() {
    synchronized (mPauseLock) {
        game_pause = true;
        mPauseLock.notifyAll();
        System.out.println("thread on resume");
    }
}

}

Aktivitätsklasse onpause

@Override
public void onPause() {
    super.onPause();

    System.out.println(" --- IN GAME PAUSE ---");


        gameLoopThread = new GameLoopThread();
        gameLoopThread.onPause();

      }

Wie kann man den Stand des Spiels in Onresume beibehalten? Vielen Dank

Answer 1

Vielleicht musst du anrufen onResume() Auf Ihrer Superklasse:

public void onResume() {
     super.onResume();
}

Hoffe das hilft dir.