1st way of making swipe gesture:
public class OnSwipeTouchListener implements OnTouchListener {
private final GestureDetector gestureDetector = new GestureDetector(new GestureListener());
public boolean onTouch(final View view, final MotionEvent motionEvent) {
return gestureDetector.onTouchEvent(motionEvent);
}
private final class GestureListener extends SimpleOnGestureListener {
private static final int SWIPE_THRESHOLD = 100;
private static final int SWIPE_VELOCITY_THRESHOLD = 100;
@Override
public boolean onDown(MotionEvent e) {
return true;
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
boolean result = false;
try {
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();
}
}
}
} catch (Exception exception) {
exception.printStackTrace();
}
return result;
}
}
public void onSwipeRight() {
}
public void onSwipeLeft() {
}
public void onSwipeTop() {
}
public void onSwipeBottom() {
}
}
//call OnSwipeTouchListener to set gesture to particular control.
relParent.setOnTouchListener(new OnSwipeTouchListener() {
public void onSwipeTop() {
Toast.makeText(this, "top", Toast.LENGTH_SHORT).show();
}
public void onSwipeRight() {
Toast.makeText(this, "right", Toast.LENGTH_SHORT).show();
}
public void onSwipeLeft() {
Toast.makeText(this, "left", Toast.LENGTH_SHORT).show();
}
public void onSwipeBottom() {
Toast.makeText(this, "bottom", Toast.LENGTH_SHORT).show();
}
});
@Override
public boolean onTouchEvent(MotionEvent touchevent) {
//return super.onTouchEvent(event);
switch (touchevent.getAction()){
// when user first touches the screen we get x and y coordinate
case MotionEvent.ACTION_DOWN: {
x1 = touchevent.getX();
y1 = touchevent.getY();
break;
}
case MotionEvent.ACTION_UP: {
x2 = touchevent.getX();
y2 = touchevent.getY();
//if left to right sweep event on screen
if (x1 < x2) { Toast.makeText(this, "Left to Right Swap Performed", Toast.LENGTH_LONG).show(); } // if right to left sweep event on screen if (x1 > x2){
Toast.makeText(this, "Right to Left Swap Performed", Toast.LENGTH_LONG).show();
}
// if UP to Down sweep event on screen
if (y1 < y2) { Toast.makeText(this, "UP to Down Swap Performed", Toast.LENGTH_LONG).show(); } //if Down to UP sweep event on screen if (y1 > y2){
Toast.makeText(this, "Down to UP Swap Performed", Toast.LENGTH_LONG).show();
}
break;
}
}
return false;
}
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