LibGDX-向上滑动或向右滑动等？

这说明了实现系统以检测滑动方向的一种非常好的方法。我将其张贴在这里，因为将来该文章可能会丢失：

创建一个类名称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);    }}}

在LibGdx应用程序的create（）函数上，将其用于激活游戏的手势处理：

Gdx.input.setInputProcessor(new SimpleDirectionGestureDetector(new SimpleDirectionGestureDetector.DirectionListener() {@Overridepublic void onUp() {}@Overridepublic void onRight() {}@Overridepublic void onLeft() {}@Overridepublic void onDown() {}}));