Question

Every time the user presses a button, the following code is executed.

new Thread() {
    @Override
    public void run() {
        aA = new albumArt(foo.getField("albumArt"),albumArt.GLOSSY_1, albumart,getBaseContext());
        runOnUiThread(new Runnable() {
            public void run() {
                    aA.placeAlbumArt();
            }
        });
    }
}.start();

There’s a problem with this:

For example:
User presses the button => Image A starts to get downloaded.
User presses the button (before Image A has finished) => Image B starts to get downloaded.

Image B finishes (before Image A) to get downloaded and then it’s shown (with aA.placeAlbumArt()).
Image A finishes and replaces Image B.

How can I avoid that Image A replaces Image B if it finishes later?

I mean, is there any way I can cancel a Thread (Image A) if another one (Image B) gets started before the first one finishes?

That would also help not to queue a lot of clicks and doing the whole process uselessly. I mean, if the user presses the button before Image A has finished, there’s no point in finishing to process Image A. If the user presses the button 5 times before Image A finishes, there’s no point in downloading Image A, B, C and D. It should only download E (the fifth click).

Answer 1

If you were to use an AsyncTask then you could cancel it. You should be able to swap your Thread out for an AsyncTask without too much trouble.