Detect swipe using onTouchListener in ScrollView

Question

I\'m using the following code to detect swipe in my Activity:

getWindow().getDecorView().getRootView().setOnTouchListener(new OnTouchListener() {
                    


        

Answer 1

You must set OntouchListener to ScrollView.

ScrollView scrollView = (ScrollView)findViewById(R.id.scrollView1);
scrollView.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                switch(event.getAction()){
                    case MotionEvent.ACTION_DOWN:{
                        downX = event.getX();}
                    case MotionEvent.ACTION_UP:{
                        upX = event.getX();

                        float deltaX = downX - upX;

                        if(Math.abs(deltaX)>0){
                            if(deltaX>=0){
                                swipeToRight();
                                return true;
                            }else{
                                swipeToLeft();
                                return  true;
                            }
                        }
                    }
                }

                return false;
            }
});