Question

I am using the following code to access a url:

final Handler handler = new Handler();
Runnable runnable = new Runnable() 
{
   public void run() 
   {
       img.setImageBitmap(returnBitmap("fromurl")); 
       handler.postDelayed(this, 50);  
   }
};

handler.postDelayed(runnable, 2000);

I observed that if the server is not up the app takes ages to close correctly if I hit the back button. Is there anyway way I could speed up the exit procedure.

Answer 1

private Runnable runnable = new Runnable() {
    private boolean killMe=false;
    public void run() {
        //some work
        if(!killMe) {

            img.setImageBitmap(returnBitmap("fromurl"));
            handler.postDelayed(this, 50);
        }
    }
    public void kill(){
        killMe=true;
    }
};

ThreadPoolExecutor threadPoolExecutor = Executors.newSingleThreadExecutor();
Runnable longRunningTask = new Runnable();

// submit task to threadpool:
Future longRunningTaskFurure = threadPoolExecutor.submit(longRunningTask);

... ...
// At some point in the future, if you want to kill the task:
longRunningTaskFuture.cancel(true);
... ...