Remove item listview with Slide - Like Gmail

Question

I am developing an application with a shop list in a listview. I need that when I swipe the item of listview to the right(or left), this item should get deleted

Answer 1

I made an answer using what macloving wrote. For now it is working, but it is only work if all your childs have the same height.

listView.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            // TODO Auto-generated method stub
            switch (event.getAction()) {
                case MotionEvent.ACTION_DOWN:
                    historicX = event.getX();
                    historicY = event.getY();
                    return false;

                case MotionEvent.ACTION_UP:
                    if (listView.getChildAt(0) != null) {
                        int heightOfEachItem = haveListView.getChildAt(0).getHeight();
                        int heightOfFirstItem = -haveListView.getChildAt(0).getTop() + haveListView.getFirstVisiblePosition()*heightOfEachItem;
                        //IF YOU HAVE CHILDS IN LIST VIEW YOU START COUNTING
                        //listView.getChildAt(0).getTop() will see top of child showed in screen
                        //Dividing by height of view, you get how many views are not in the screen
                        //It needs to be Math.ceil in this case because it sometimes only shows part of last view
                        final int firstPosition = (int) Math.ceil(heightOfFirstItem / heightOfEachItem); // This is the same as child #0

                        //Here you get your List position, use historic Y to get where the user went first
                        final int wantedPosition = (int) Math.floor((historicY - haveListView.getChildAt(0).getTop()) / heightOfEachItem) + firstPosition;
                        //Here you get the actually position in the screen
                        final int wantedChild = wantedPosition - firstPosition;
                        //Depending on delta, go right or left
                        if (event.getX() - historicX < -DELTA) {
                            //If something went wrong, we stop it now
                            if (wantedChild < 0 || wantedChild >= List.size()|| wantedChild >= listView.getChildCount()) {

                                return true;
                            }
                            //Start animation with 500 miliseconds of time
                            listView.getChildAt(wantedChild).startAnimation(outToLeftAnimation(500));
                            //after 500 miliseconds remove from List the item and update the adapter.
                            new java.util.Timer().schedule(
                                    new java.util.TimerTask() {
                                        @Override
                                        public void run() {
                                            List.remove(wantedPosition);
                                            updateAdapter();
                                        }
                                    },
                                    500
                            );
                            return true;

                        } else if (event.getX() - historicX > DELTA) {
                            //If something went wrong, we stop it now
                            if (wantedChild < 0 || wantedChild >= List.size() || wantedChild >= listView.getChildCount()) {

                                return true;
                            }
                            //Start animation with 500 miliseconds of time
                            listView.getChildAt(wantedChild).startAnimation(outToRightAnimation(500));
                            //after 500 miliseconds remove from List the item and update the adapter.
                            new java.util.Timer().schedule(
                                    new java.util.TimerTask() {
                                        @Override
                                        public void run() {
                                            List.remove(wantedPosition);
                                            updateAdapter();
                                        }
                                    },
                                    500
                            );
                            return true;

                        }
                    }
                    return true;
                default:
                    return false;
            }
        }
    });

The animations have this function:

private Animation outToLeftAnimation(int duration) {
    Animation outtoLeft = new TranslateAnimation(
            Animation.RELATIVE_TO_PARENT, 0.0f,
            Animation.RELATIVE_TO_PARENT, -1.0f,
            Animation.RELATIVE_TO_PARENT, 0.0f,
            Animation.RELATIVE_TO_PARENT, 0.0f);
    outtoLeft.setDuration(duration);
    outtoLeft.setInterpolator(new AccelerateInterpolator());
    return outtoLeft;
}

private Animation outToRightAnimation(int duration) {
    Animation outtoRight = new TranslateAnimation(
            Animation.RELATIVE_TO_PARENT, 0.0f,
            Animation.RELATIVE_TO_PARENT, +1.0f,
            Animation.RELATIVE_TO_PARENT, 0.0f,
            Animation.RELATIVE_TO_PARENT, 0.0f);
    outtoRight.setDuration(duration);
    outtoRight.setInterpolator(new AccelerateInterpolator());
    return outtoRight;
}

I am trying this, and until now i haven't seen errors, if someone could try as well would be good.