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Android

Posted by Matthew Ong
Matthew Ong
6,041 Points

How to reset a DrawableAnimation

I'm trying to create a dynamically populated frame animation for a simple slot reel. I create a random sequence of 50 animated images to make it look like the reel is spinning, then add the final three symbols at the end.

My problem is that each time this method is run, it adds the frames onto the previous Animation. The first time it is run, the animation has 53 frames, the second time it has 106 frames, etc. I want to reset/clear the animation each time it is run, but I cannot figure out how to do so. If anyone has any ideas it would be greatly appreciated!

      private void animate(int r1c1, int r2c1, int r3c1, int r1c2, int r2c2, int r3c2, int r1c3, int r2c3, int r3c3) {
        ImageView imgView = (ImageView)findViewById(R.id.animationImage);
        imgView.setVisibility(ImageView.VISIBLE);

        imgView.setBackgroundResource(R.drawable.frame_animation);

        AnimationDrawable frameAnimation = (AnimationDrawable) imgView.getBackground();



        BitmapDrawable cherry = (BitmapDrawable)getResources().getDrawable(R.drawable.cherry);
        BitmapDrawable grape = (BitmapDrawable)getResources().getDrawable(R.drawable.grape);
        BitmapDrawable lemon = (BitmapDrawable)getResources().getDrawable(R.drawable.lemon);
        BitmapDrawable lucky7 = (BitmapDrawable)getResources().getDrawable(R.drawable.lucky7);
        BitmapDrawable watermelon = (BitmapDrawable)getResources().getDrawable(R.drawable.watermelon);
        BitmapDrawable orange = (BitmapDrawable)getResources().getDrawable(R.drawable.orange);
        BitmapDrawable[] symbols = {cherry,watermelon,grape,lemon,orange,lucky7};
        frameAnimation = (AnimationDrawable) imgView.getBackground();
        for(int i = 0; i < 50; i++) {
            frameAnimation.addFrame(symbols[(int)(Math.random() * 6)], 50);

        }
        frameAnimation.addFrame(symbols[r3c1], 200);
        frameAnimation.addFrame(symbols[r2c1], 200);
        frameAnimation.addFrame(symbols[r1c1], 200);

        if (frameAnimation.isRunning()) {
            frameAnimation.stop();
            frameAnimation.start();
        }
        else {

            frameAnimation.start();
        }


    }