Question

I have a button, when user tap the button, i run a Thread to do Something.

When user tap many time to my button, i have many thread run in a same time.

How can i avoid it, when user multiple tap, i have run only thread run. When the first thread complete, the second thread can run.

Thanks

Answer 1

You need to keep a boolean that indicates you’ve acted on the click and started the thread. Something like this:

boolean threadStarted = false;

public void onClick(View v) {
    if (!threadStarted) {
        // start thread here
        threadStarted = true;
    } else {
        // Ignore this spurious click
    }
}

Note: Don’t forget to reset the boolean to false after the thread has completed