Reputation: 320

Swipe to Left,Top,Right,Bottom on screen margins in android

I am working on swipe gesture. Actually I want to restrict swipe if touch coordinates > Tap on left and right edges of screen (100 px) like

If I swipe from left to right and touch coordinate > from screen left Top 100px I want to restrict swipe

If swipe from right to left and touch coordinate

And There is no Restriction for Top and Bottom swipe.

Here is my code what I tried :

    float diffY = e2.getY() - e1.getY();
            float diffX = e2.getX() - e1.getX();
            if (Math.abs(diffX) > Math.abs(diffY)) {
                if (Math.abs(diffX) > SWIPE_THRESHOLD
                        && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) {

                    if (diffX > 0) {
                        onSwipeRight();
                    } else {
                        onSwipeLeft();
                    }
                }
            } else {
                if (Math.abs(diffY) > SWIPE_THRESHOLD
                        && Math.abs(velocityY) > SWIPE_VELOCITY_THRESHOLD) {
                    if (diffY > 0) {
                        onSwipeBottom();
                    } else {
                        onSwipeTop();
                    }
                }
            }

Upvotes: 1

Answers (3)

ymz

Reputation: 6924

there is a great post for getting the siplay metrics: Get screen dimensions in pixels. i'm not sure that i quite understance the meaning of swipe along the side s of the screen (1 finger at the right and the other at the left maybe?).. but i guuess that in your case it should be something like:

        Display display = getWindowManager().getDefaultDisplay();
        Point size = new Point();
        display.getSize(size);
        int width = size.x;
        int height = size.y;

        PointF p1 = new PointF(e1.getX(), e1.getY());
        PointF p2 = new PointF(e2.getX(), e2.getY());

        if ((p1.x < 100 || p1.x > width - 100) && (p2.x < 100 || p2.x > width - 100))
        {

        float diffY = p2.y - p1.y;
        float diffX = p2.x - p1.x;

        int dirY = (diffY < 0) ? -1 : 1;
        int dirX = (diffX < 0) ? -1 : 1;

        diffY = Math.abs(diffY); diffX = Math.abs(diffX); 
        if (diffX > diffY) {
            if (diffX > SWIPE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) {

                if (dirX > 0) {
                    onSwipeRight();
                } else {
                    onSwipeLeft();
                }
            }
        } else {
            if (diffY > SWIPE_THRESHOLD && Math.abs(velocityY) > SWIPE_VELOCITY_THRESHOLD) {
                if (dirY > 0) {
                    onSwipeBottom();
                } else {
                    onSwipeTop();
                }
            }
        }
        }

Upvotes: 0