Attach to object

[petomavar]

Great codes. I have a brick breaker game and want particle on place where ball hits the brick. From Main class:

//collision to bricks
for (int y = 0; y < Brick_Pattern[currentLevel].length; y++) {
    for (int x = 0; x < Brick_Pattern[currentLevel][0].length; x++) {
	if (bricks_current_level[x][y] != null) {
		if (balls.get(i).CollidedWith(bricks_current_level[x][y])) {
			balls.get(i).speedy = -balls.get(i).speedy;
			balls.get(i).speedx = -(bricks_current_level[x][y].x + (bricks_current_level[x][y].getWidth() / 2) - balls.get(i).x) / 4;
			if (bricks_current_level[x][y].tag == b1 || bricks_current_level[x][y].tag == b2 ||
		           bricks_current_level[x][y].tag == b3 || bricks_current_level[x][y].tag == b4)
		{
		//collided to brick 1, 2... 
	bricks_current_level[x][y] = null;     // brick gone

And now behind that I put ParticleSystem code inside:

	runOnUiThread(new Runnable() {
       @Override
public void run() {
...code here....
	}
  });

because my View is defined in Screen class and Main class extends Screen class. From Screen.java:

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		activity = this;
		//full screen
		requestWindowFeature(Window.FEATURE_NO_TITLE);
		getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
		getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);

		//create surface
		layout = new RelativeLayout(this);
		surface = new SurfaceView(this);
		layout.addView(surface);
		setContentView(layout);

And as a result I always got particles in middle of layout insted of place where destroyed brick is. How to attach code to bricks_current_level[x][y] position?

[plattysoft]

There are methods for emitters based on X-Y coordinates, but not for oneShot, although it should not be hard to add them.

However, building a game using Views you are going to encounter performance problems quite soon. If you are doing it for the learning experience, I recommend you to take a look at Mastering Android Game Development which has a chapter about particle systems based on this library. It also has a chapter about efficient collision detection.

Otherwise, to build a breakout style game, which is 2D, I'd recommend using an engine, like AndEngine, which also has its own particle system implementation.

[petomavar]

OK, I will check and try with emiter, I also found that book.

[plattysoft]

There is one quick hack you can do, which is to have a 1 x 1 dip view with no background and use that one as the anchor for the particle system.

You need to reposition that view to the x, y and then do the oneShot, it will read the position of the anchor view.

As I said it is a hack / woraround, but it should do the trick.