android repeat action on pressing and holding a button
android
Solution
There are multiple ways to accomplish this, but a pretty straightforward one would be to post a `Runnable` on a `Handler` with a certain delay. In it's most basic form, it will look somewhat like this:
Button button = (Button) findViewById(R.id.button);
button.setOnTouchListener(new View.OnTouchListener() {
private Handler mHandler;
@Override public boolean onTouch(View v, MotionEvent event) {
switch(event.getAction()) {
case MotionEvent.ACTION_DOWN:
if (mHandler != null) return true;
mHandler = new Handler();
mHandler.postDelayed(mAction, 500);
break;
case MotionEvent.ACTION_UP:
if (mHandler == null) return true;
mHandler.removeCallbacks(mAction);
mHandler = null;
break;
}
return false;
}
Runnable mAction = new Runnable() {
@Override public void run() {
System.out.println("Performing action...");
mHandler.postDelayed(this, 500);
}
};
});
The idea is pretty simple: post a `Runnable` containing the repeated action on a `Handler` when the 'down' touch action occurs. After that, don't post the `Runnable` again until the 'up' touch action has passed. The `Runnable` will keep posting itself to the `Handler` (while the 'down' touch action is still happening), until it gets removed by the touch up action - that's what enables the 'repeating' aspect.
Depending on the actual behaviour of the button and its onclick/ontouch you're after, you might want to do the initial post without a delay.
Problem
I want to implement repeat action on pressing and holding a button. Example: When user click on a button and hold it,it should call a similar method again and again on a fixed interval until the user remove his finger from the button.