Doubletap in Android

Android How to detect double tap?

try this

final GestureDetector mDetector = new GestureDetector(getContext(), new GestureDetector.SimpleOnGestureListener {

    @Override
    public boolean onDown(MotionEvent e) {

        return true;
    }

    @Override
    public boolean onDoubleTap(MotionEvent e) {

        return true;
    }
});

Double Tap event in an Activity

onDoubleTap function Use specific element, like an ImageView id, is 'selectedImage' & run this function name is 'selectImage()' full code:

findViewById(R.id.selectdImage).setOnTouchListener(new View.OnTouchListener() {
        private GestureDetector gestureDetector = new GestureDetector(MainActivity.this, new GestureDetector.SimpleOnGestureListener() {
            @Override
            public boolean onDoubleTap(MotionEvent e) {
                Toast.makeText(getApplicationContext(), "onDoubleTap", Toast.LENGTH_SHORT).show();
                selectImage(nView);
                return super.onDoubleTap(e);
            }
            @Override
            public boolean onSingleTapConfirmed(MotionEvent event) {
                Log.d("onSingleTapConfirmed", "onSingleTap");
                return false;
            }
        });

        @Override
        public boolean onTouch(View v, MotionEvent event) {

            gestureDetector.onTouchEvent(event);
            return true;
        }
    });

Android avoid calling single tap twice for double tap, without using onSingleTapConfirmed

The way I would do it is set a state variable as a long and call it timeOfLastTouch and set it to 0. Then in each OnClickListener function put this code in their

long currentTime = System.currentTimeMillis();
if (timeOfLastTouch + 100 < currentTime) {
    // code
    timeOfLastTouch = System.currentTimeMillis();
}

Android detecting double tap without single tap first

I'm confused on what you're trying to achieve. The double tap method onDoubleTap() isn't called when the single tap occurs. On the other hand, for every double tap there are two associated single tap onSingleTapUp() method calls.

If you want to distinguish them, you can use onSingleTapConfirmed() which is triggered when the gesture detector is sure the tap is single. See reference:

Notified when a single-tap occurs.

Unlike OnGestureListener.onSingleTapUp(MotionEvent), this will only be called after the detector is confident that the user's first tap is not followed by a second tap leading to a double-tap gesture

You can then use this method call in combination with a boolean flag to essentially detect any type of single/double tap.

Android distinguish between tap and double tap

I would suggest that you switch to the SimpleGestureListener and use the onDoubleTap() and onSingleTapConfirmed() methods.

Android: How to detect double-tap?

Why aren't you using a Long Press? Or are you using that already for something else? The advantages of a Long Press over a Double Touch:

• Long Press is a recommeded interaction in the UI Guidelines, Double Touch is not.
• It's what users expect; a user might not find a Double Touch action as they won't go looking for it
• It's already handled in the API.
• Implementing a Double Touch will affect handling of Single Touches, because you'll have to wait to see if every Single Touch turns into a Double Touch before you can process it.

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