Initializing our variables

After defining our variables, it is also essential to initialize them. We do so from our surfaceCreated() method as follows:

@Overridepublic void surfaceCreated(SurfaceHolder holder){    bgImg = new BackgroundImage(BitmapFactory.decodeResource    (getResources(), R.drawable.background_image));    playerCharacter = new PlayerCharacter(BitmapFactory.decodeResource    (getResources(),R.drawable.player_run),200,246,3);    rocks = new ArrayList<Rock>();    rockStartTime = System.nanoTime();    //we can safely start the game loop    mainThread.setRunning(true);     mainThread.start();}

And that takes care of our variable values.

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