DoubleTap in android [duplicate]

I need to create a small text area.Within that text area when i double click,it will move to next activity.How could i do this?

Solution 1:

If you do the setup right, the OnDoubleTapListener, within the GestureListeneris very useful. You dont need to handle each single tap and count time in between. Instead let Android handle for you what a tap, a double-tap, a scroll or fling might be. With the helper class SimpleGestureListener that implements the GestureListener and OnDoubleTapListener you dont need much to do.

findViewById(R.id.touchableText).setOnTouchListener(new OnTouchListener() {
    private GestureDetector gestureDetector = new GestureDetector(Test.this, new GestureDetector.SimpleOnGestureListener() {
        @Override
        public boolean onDoubleTap(MotionEvent e) {
            Log.d("TEST", "onDoubleTap");
            return super.onDoubleTap(e);
        }
        ... // implement here other callback methods like onFling, onScroll as necessary
    });

    @Override
    public boolean onTouch(View v, MotionEvent event) {
        Log.d("TEST", "Raw event: " + event.getAction() + ", (" + event.getRawX() + ", " + event.getRawY() + ")");
        gestureDetector.onTouchEvent(event);
        return true;
    }
});

Note: I tested around quite a while to find out, what the right mixture of return true and return false is. This was the really tricky part here.

Another note: When you test this, do it on a real device, instead of the emulator. I had real trouble getting the mouse fast enough to create an onFling event. Real fingers on real devices seem to be much faster.

Solution 2:

A better alternative is to create a lightweight Abstract Class

public abstract class DoubleClickListener implements OnClickListener {

    private static final long DOUBLE_CLICK_TIME_DELTA = 300;//milliseconds

    long lastClickTime = 0;

    @Override
    public void onClick(View v) {
        long clickTime = System.currentTimeMillis();
        if (clickTime - lastClickTime < DOUBLE_CLICK_TIME_DELTA){
            onDoubleClick(v);
            lastClickTime = 0;
        } else {
            onSingleClick(v);
        }
        lastClickTime = clickTime;
    }

    public abstract void onSingleClick(View v);
    public abstract void onDoubleClick(View v);
}

And use it like

 view.setOnClickListener(new DoubleClickListener() {

        @Override
        public void onSingleClick(View v) {

        }

        @Override
        public void onDoubleClick(View v) {

        }
    });

Solution 3:

very simple logic use below code

    boolean firstTouch = false;
        @Override
        public boolean onTouchEvent(MotionEvent event) {
            if(event.getAction() == event.ACTION_DOWN){
                if(firstTouch && (Helper.getCurrentTimeInMilliSeconds() - time) <= 300) {
                    //do stuff here for double tap
                    Log.e("** DOUBLE TAP**"," second tap ");
                    firstTouch = false;

                } else {
                    firstTouch = true;
                    time = Helper.getCurrentTimeInMilliSeconds();
                    Log.e("** SINGLE  TAP**"," First Tap time  "+time);
                    return false;
                }
            }
            return true;
    }