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PODetecting touches on Views drawn on SurfaceView
 

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  1. PODetecting touches on Views drawn on SurfaceView
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    <p>I'm working on a game and ran into a bit of trouble, I might not be doing this correctly as I'm new to the graphic side of Android.</p> <p>I have a <code>SurfaceView</code> and an <code>ArrayList</code> of my own <code>Card</code> object which extends <code>View</code>. I override the <code>onDraw</code> method for the <code>Card</code> object, and then in the <code>SurfaceView's onDraw</code> I draw everything. The drawing part works as it should.</p> <p>I now try to detect when an individual card is touched using the <code>onTouchListener</code>, I set the listener for each card, but it detects the touch as if the view that being touched is the <code>SurfaceView</code>. It's possible that my whole way of thinking of this is wrong, so I'm asking for your advice.</p> <p>Some code:</p> <pre><code>public GameSurfaceView(Context context) { super(context); GAME_STATE = GameState.LOADING; this.context = context; holder = getHolder(); holder.addCallback(new SurfaceHolder.Callback() { @Override public void surfaceDestroyed(SurfaceHolder holder) { } @Override public void surfaceCreated(SurfaceHolder holder) { Canvas c = holder.lockCanvas(null); onDraw(c); holder.unlockCanvasAndPost(c); } @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { } }); } </code></pre> <p>SurfaceView onDraw():</p> <pre><code>@Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); canvas.drawRGB(30, 180, 30); for (Card card : user.getTableCards()) { card.draw(canvas); } } </code></pre> <p>Card's onDraw():</p> <pre><code>@Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); canvas.drawBitmap(getBitmap(), x, y, null); } </code></pre> <p>and onTouch</p> <pre><code>@Override public boolean onTouch(View v, MotionEvent event) { Log.d("TOUCH", "Class: " + v.getClass().toString()); if (v.getClass() == Card.class) { Log.d("CARD", "Touched: " + ((Card) v).getValue()); } return true; } </code></pre> <p>I'm always getting the <code>SurfaceView</code> class being logged. Is this even the right way of doing something like that? I need to detect touch on individual objects of the same class..</p> <p>I currently do this by adding a member of type <code>Rect</code> to each card and then looping over and checking if the x and y of the touch are contained in that rect, but it seems like an expensive way, iterating over each card (even with max of 52) and checking it..</p> <p>Thanks</p>
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