LibGdx has the built in support for Gesture detection. However, the Swipe Gesture is not well-supported and a bit simple. I have found a solution from this article. The code on that link contains errors. Here is the fixed version of it.
Create a class name SimpleDirectionGestureDetector
public class SimpleDirectionGestureDetector extends GestureDetector {
public interface DirectionListener {
void onLeft();
void onRight();
void onUp();
void onDown();
}
public SimpleDirectionGestureDetector(DirectionListener directionListener) {
super(new DirectionGestureListener(directionListener));
}
private static class DirectionGestureListener extends GestureAdapter{
DirectionListener directionListener;
public DirectionGestureListener(DirectionListener directionListener){
this.directionListener = directionListener;
}
@Override
public boolean fling(float velocityX, float velocityY, int button) {
if(Math.abs(velocityX)>Math.abs(velocityY)){
if(velocityX>0){
directionListener.onRight();
}else{
directionListener.onLeft();
}
}else{
if(velocityY>0){
directionListener.onDown();
}else{
directionListener.onUp();
}
}
return super.fling(velocityX, velocityY, button);
}
}
}On the create() function of the LibGdx application, put this to activate gesture handling for your game
Gdx.input.setInputProcessor(new SimpleDirectionGestureDetector(new SimpleDirectionGestureDetector.DirectionListener() {
@Override
public void onUp() {
// TODO Auto-generated method stub
}
@Override
public void onRight() {
// TODO Auto-generated method stub
}
@Override
public void onLeft() {
// TODO Auto-generated method stub
}
@Override
public void onDown() {
// TODO Auto-generated method stub
}
}));