How can I implement onTouch function android?

Question

Hi I want to create aplication which loads large image, and simple gesture I can move across it. I have to image printed out but I can not implement onTouch so it remains st

Answer 1

Within your view, you need to create the "OnTouchListener" which should look something like this:

myView.setOnTouchListener(new View.OnTouchListnener(){
    @Override
    public boolean onTouch(View v, MotionEvent e){
        switch(e.getAction()){
        case MotionEvent.ACTION_DOWN:
        //and code will go here for putting the finger on the screen

I would have a look at MotionEvent and looking at the various levels. You'll want to pay attention to how it can pack several bits of movement information into one MotionEvent.

Answer 2

As you're already writing a custom view, instead of setting a listener, you might want to incorporate a GestureDetector and listener inside your view, and above all avoid the switch(e.getAction()) thing, because OnGestureListener is on a higher level and will provide you with event already detected as a gesture (scroll, fling, long press...).

See an example here.