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POAndroid How do I write a simple timer for UI events?
 

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  1. POAndroid How do I write a simple timer for UI events?
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    <p>My app needs to check whether user double clicks or not. But I can't use Android OnDoubleClickListener or something likes that. Just implements it :</p> <p>My problem is diferent from "normal" double click.</p> <p>What I want is: If user double clicks, run the Y activity. If user clicks 1 click only, wait 500 ms then run the X activity. If user click 2 click slowly, run the X activity</p> <p>This is my code:</p> <pre><code> long now = System.currentTimeMillis(); thisTime = now; if (thisTime - lastTouchTime &lt; WAIT_TIME) { // Double tap this.getContext() .getApplicationContext() .startActivity( (new Intent(getContext(), ChangePlaceActivity.class)) .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK)); // If is double tap, reset to start state. lastTouchTime = -1; return true; } else { // Too slow or first click // If not double tap, save last state for next check lastTouchTime = thisTime; Log.d("Worker thread", "Declare" + System.currentTimeMillis()); Thread t = new Thread() { public void run() { try { sleep(WAIT_TIME); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }; t.start(); try { t.join(); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } Log.d("Worker thread", "" + System.currentTimeMillis()); // start MainAct Log.d("Single Click", "Yes"); this.getContext() .getApplicationContext() .startActivity( (new Intent(getContext(), MainActivity.class)) .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK)); } </code></pre> <p>If use code like this, I can't got double click. If remove thread.run() thread.join(). It will start MainActivity before ChangePlacecActivity.</p> <p>Is there any solution for this problems? Thank you in advance!</p> <p>Sorry for my bad English.</p>
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    1. COWhy don't you start a timer after the first tap. If youre already tracking a tap and get another before the timer fires, run your double tap code. If the timer fires first, run your X code. This is the way that event driven UI works. Please never, ever call sleep, especially on the UI thread.
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      1. POAndroid How do I write a simple timer for UI events?
      1. USJason Coco
    2. CO@Jason Coco: I know that shouldn't block UI thread. A timer is what I need but dont' know to how. Please give the answer. Thanks!
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      1. POAndroid How do I write a simple timer for UI events?
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    3. COI don't know off the top of my head how to write a timer in Android. I suggest you edit your question and name it "How do I write a simple timer for UI events?". You can leave the rest of the question as is and leave these comments. I'm sure you'll get an answer then.
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      1. POAndroid How do I write a simple timer for UI events?
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