Appium Automating Mobile Gestures

Android gesture: There is a couple of basic gestures, like swipe, fling or pinch, which are commonly used in Android applications 

public void swipeUp() {
        Dimension size = driver.manage().window().getSize();
        int startX = size.getWidth() / 2;
        int startY = (int) (size.getHeight() * 0.8);
        int endY = (int) (size.getHeight() * 0.2);
        performSwipe(startX, startY, startX, endY);
    }

    public void swipeDown() {
        Dimension size = driver.manage().window().getSize();
        int startX = size.getWidth() / 2;
        int startY = (int) (size.getHeight() * 0.2);
        int endY = (int) (size.getHeight() * 0.8);
        performSwipe(startX, startY, startX, endY);
    }

    public void swipeLeft() {
        Dimension size = driver.manage().window().getSize();
        int startX = (int) (size.getWidth() * 0.8);
        int endX = (int) (size.getWidth() * 0.2);
        int y = size.getHeight() / 2;
        performSwipe(startX, y, endX, y);
    }

    public void swipeRight() {
        Dimension size = driver.manage().window().getSize();
        int startX = (int) (size.getWidth() * 0.2);
        int endX = (int) (size.getWidth() * 0.8);
        int y = size.getHeight() / 2;
        performSwipe(startX, y, endX, y);
    }

    public void longPress(WebElement element) {
        Point center = getCenter(element);
        PointerInput finger = new PointerInput(PointerInput.Kind.TOUCH, "finger");
        Sequence longPressSeq = new Sequence(finger, 0);
        longPressSeq.addAction(finger.createPointerMove(Duration.ZERO, PointerInput.Origin.viewport(), center.getX(), center.getY()));
        longPressSeq.addAction(finger.createPointerDown(PointerInput.MouseButton.LEFT.asArg()));
        longPressSeq.addAction(new Pause(finger, Duration.ofSeconds(2)));
        longPressSeq.addAction(finger.createPointerUp(PointerInput.MouseButton.LEFT.asArg()));
        driver.perform(Collections.singletonList(longPressSeq));
    }

    public void doubleTap(WebElement element) {
        Point center = getCenter(element);
        PointerInput finger = new PointerInput(PointerInput.Kind.TOUCH, "finger");
        Sequence doubleTapSeq = new Sequence(finger, 0);
        doubleTapSeq.addAction(finger.createPointerMove(Duration.ZERO, PointerInput.Origin.viewport(), center.getX(), center.getY()));
        doubleTapSeq.addAction(finger.createPointerDown(PointerInput.MouseButton.LEFT.asArg()));
        doubleTapSeq.addAction(new Pause(finger, Duration.ofMillis(50)));
        doubleTapSeq.addAction(finger.createPointerUp(PointerInput.MouseButton.LEFT.asArg()));
        doubleTapSeq.addAction(new Pause(finger, Duration.ofMillis(100)));
        doubleTapSeq.addAction(finger.createPointerDown(PointerInput.MouseButton.LEFT.asArg()));
        doubleTapSeq.addAction(new Pause(finger, Duration.ofMillis(50)));
        doubleTapSeq.addAction(finger.createPointerUp(PointerInput.MouseButton.LEFT.asArg()));
        driver.perform(Collections.singletonList(doubleTapSeq));
    }

    private void performSwipe(int startX, int startY, int endX, int endY) {
        PointerInput finger = new PointerInput(PointerInput.Kind.TOUCH, "finger");
        Sequence swipe = new Sequence(finger, 0);
        swipe.addAction(finger.createPointerMove(Duration.ZERO, PointerInput.Origin.viewport(), startX, startY));
        swipe.addAction(finger.createPointerDown(PointerInput.MouseButton.LEFT.asArg()));
        swipe.addAction(finger.createPointerMove(Duration.ofMillis(600), PointerInput.Origin.viewport(), endX, endY));
        swipe.addAction(finger.createPointerUp(PointerInput.MouseButton.LEFT.asArg()));
        driver.perform(Collections.singletonList(swipe));
    }

    private Point getCenter(WebElement element) {
        Point loc = element.getLocation();
        Dimension size = element.getSize();
        return new Point(loc.getX() + size.getWidth() / 2, loc.getY() + size.getHeight() / 2);
    }