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POHow to use Async task to pause program multiple times
 

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  1. POHow to use Async task to pause program multiple times
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    <p>I know the title is somewhat confusing, my problem is this: I want to "pause" my program multiple times (via a loop) using sleep(ms) and make changes to several buttons that the user has pressed. I understand that changes to the UI can only be made in the main thread, so I am wondering how to convert this code into an Async task. I also remember reading somewhere that Async task can only be called once? If this is so, what other solutions could I look into?</p> <pre><code>View.OnClickListener SimulateButtonHandler = new View.OnClickListener() { @Override public void onClick(View v) { for(int j=0;j&lt;169;j++) //169 buttons to click { if(ClickedPoints[j]!=null) //how I keep track of which buttons has clicked { //clear button color Drawable d2 = ClickedPoints[j].getBackground(); ClickedPoints[j].invalidateDrawable(d2); d2.clearColorFilter(); } } Timer timer = new Timer(); for(int i=0;i&lt;169;i++) { if(ClickedPoints[i]!=null) { //change the color after some time Simulate(timer, i); //clear color again Drawable d2 = ClickedPoints[i].getBackground(); ClickedPoints[i].invalidateDrawable(d2); d2.clearColorFilter(); } } } }; public void Simulate(Timer timer, final int index) { timer.schedule(new TimerTask() { public void run() { Sim(index); } }, 1000); //delay for some amount of time, then rehighlight the button } private void Sim(int i) { Drawable d1 = ClickedPoints[i].getBackground(); PorterDuffColorFilter filter = new PorterDuffColorFilter(Color.RED, PorterDuff.Mode.SRC_ATOP); d1.setColorFilter(filter); } </code></pre>
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    1. USRussell Geroche
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    1. COWait... sorry. But why exactly do you want to do this?? Why not just make the changes immediately?
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      1. USAlex Lockwood
    2. COMy goal is to "simulate" some pattern that the users have created by clicking on a grid on buttons. The clicked buttons will turn red after some amount of time, and then back to clear. The time delay is associated to the project and simulates how long an electron beam is at a point (button). Essentially all of the clicked buttons will blink, sequentially. My apologies for the lack of clarity
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      1. USRussell Geroche
    3. COeasyest will be to use a Handler where you can `postMessageAtTime`
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      1. USRafael T
 

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