Gesture Movement in android

ActivitySwipeDetector activitySwipeDetector = new ActivitySwipeDetector(
this);
relative2 = (RelativeLayout) this.findViewById(R.id.relativeLayout2);
relative2.setOnTouchListener(activitySwipeDetector);

//---------------------------------------------------

public class ActivitySwipeDetector implements View.OnTouchListener {
static final String logTag = "ActivitySwipeDetector";
private Activity activity;
static final int MIN_DISTANCE = 1;
private float downX, downY, upX, upY;
public ActivitySwipeDetector(Activity activity) {
this.activity = activity;
}
public void onRightToLeftSwipe() {
Log.i(logTag, "RightToLeftSwipe!");
// activity.doSomething();
}
public void onLeftToRightSwipe() {
Log.i(logTag, "LeftToRightSwipe!");
// activity.doSomething();
}
public void onTopToBottomSwipe() {
Log.i(logTag, "onTopToBottomSwipe!");
finish();
overridePendingTransition(R.anim.in_animation, R.anim.out_animation);
// activity.doSomething();
}
public void onBottomToTopSwipe() {
Log.i(logTag, "onBottomToTopSwipe!");
// activity.doSomething();
}
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN: {
downX = event.getX();
downY = event.getY();
return true;
}
case MotionEvent.ACTION_UP: {
upX = event.getX();
upY = event.getY();
float deltaX = downX - upX;
float deltaY = downY - upY;
// swipe horizontal?
if (Math.abs(deltaX) > MIN_DISTANCE) {
// left or right
if (deltaX < 0) {
this.onBottomToTopSwipe();
return true;
}
if (deltaX > 0) {
this.onTopToBottomSwipe();
return true;
}
} else {
Log.i(logTag, "Swipe was only " + Math.abs(deltaX)
+ " long, need at least " + MIN_DISTANCE);
return false; // We don't consume the event
}
// swipe vertical?
if (Math.abs(deltaY) > MIN_DISTANCE) {
// top or down
if (deltaY < 0) {
this.onTopToBottomSwipe();
return true;
}
if (deltaY > 0) {
this.onBottomToTopSwipe();
return true;
}
} else {
Log.i(logTag, "Swipe was only " + Math.abs(deltaX)
+ " long, need at least " + MIN_DISTANCE);
return false; // We don't consume the event
}
return true;
}
}
return false;
}
}