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PONot all touch events being received by Android view
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  1. PONot all touch events being received by Android view
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    copied!<p>In my Android app, I have a custom <code>View</code> that receives touch events. However, it doesn't react every time I touch it - only sometimes. From what I can tell, if I touch the screen, move my finger, and then let go - even if I move only a little - the event is picked up, but if I tap the screen too quickly for my finger to slide across it, nothing happens. How can I fix this?</p> <p>Here is the View's code:</p> <pre><code>public class SpeedShooterGameView extends GameActivity.GameView { public SpeedShooterGameView(Context arg0, AttributeSet arg1) { super(arg0, arg1); } @Override protected GameThread getNewThread(SurfaceHolder holder, Context context) { return new SpeedShooterGameThread(holder, context); } // Program is driven by screen touches public boolean onTouchEvent(MotionEvent event) { SpeedShooterGameThread thread = (SpeedShooterGameThread) getThread(); if (thread.isRunning()) { return thread.recieveTouch(event); } else { return false; } } } </code></pre> <p>I am pretty confident that the object returned in the line <code>SpeedShooterGameThread thread = (SpeedShooterGameThread) getThread();</code> is working as I expect it to, but if the code above looks fine, I'll post the relevant code from that class as well. When <code>thread.recieveTouch(event);</code> is called, the <code>MotionEvent</code> is being sent to another thread.</p> <p>EDIT: I'll go ahead and post the code for <code>SpeedShooterGameThread</code>:</p> <pre><code>public class SpeedShooterGameThread extends GameActivity.GameView.GameThread { //... snip ... private Queue&lt;MotionEvent&gt; touchEventQueue; //... snip ... public synchronized final void newGame() { //called from the constructor, used to go to a known stable state //... snip ... touchEventQueue = new LinkedList&lt;MotionEvent&gt;(); //... snip ... } //...snip... public synchronized boolean recieveTouch(MotionEvent event) { return touchEventQueue.offer(event); } private synchronized void processTouchEvents() { synchronized (touchEventQueue) { while (!touchEventQueue.isEmpty()) { MotionEvent event = touchEventQueue.poll(); if (event == null) { continue; } //... snip .... } } } //... snip ... } </code></pre>
 

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