(libgdx学习)Polling

官方文档部分解释

Each finger that goes down on the screen gets a so called pointer index. The first finger to go down gets the index 0, the next one gets the index 1 and so on. If a finger is lifted off the screen and touched down again, while other fingers are still on the screen, the finger will get the first free index. An example:

1. first finger goes down -> 0
2. second finger goes down -> 1
3. third finger goes down -> 2
4. second finger goes up -> 1 becomes free
5. first finger goes up -> 0 becomes free, at this point only 2 is used
6. another finger goes down -> 0, as it is the first free index

优先分配最小索引

一、初始化及常见的API

//		System.out.println("--------->isTouched(): " + Gdx.input.isTouched());//判断是否有手指点下去
//		System.out.println("--------->isTouched(0): " + Gdx.input.isTouched(0));//判断第一个手指是否已经点下去
//		System.out.println("--------->isTouched(1): " + Gdx.input.isTouched(1));
//		System.out.println("--------->isTouched(2): " + Gdx.input.isTouched(2));
//		System.out.println("--------->justTouched(): " + Gdx.input.justTouched());//判断手指是否刚刚点下去
		

System.out.println("-------->Gdx.input.getX(0): " + Gdx.input.getX(0) + ",Gdx.input.getY(0): " + Gdx.input.getY(0));

二、应用举例

package com.example.groupactiontest;

import com.badlogic.gdx.ApplicationListener;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.Input.Keys;
import com.badlogic.gdx.Input.Peripheral;
import com.badlogic.gdx.graphics.GL10;

public class MyGame implements ApplicationListener {

	@Override
	public void create() {
		
	}

	@Override
	public void dispose() {
		// TODO Auto-generated method stub

	}

	@Override
	public void pause() {
		// TODO Auto-generated method stub

	}

	@Override
	public void render() {
		Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT);
		
		
//		System.out.println("--------->isTouched(): " + Gdx.input.isTouched());//判断是否有手指点下去
//		System.out.println("--------->isTouched(0): " + Gdx.input.isTouched(0));//判断第一个手指是否已经点下去
//		System.out.println("--------->isTouched(1): " + Gdx.input.isTouched(1));
//		System.out.println("--------->isTouched(2): " + Gdx.input.isTouched(2));
//		System.out.println("--------->justTouched(): " + Gdx.input.justTouched());//判断手指是否刚刚点下去
		
		if(Gdx.input.isTouched(0)){
			System.out.println("-------->Gdx.input.getX(0): " + Gdx.input.getX(0) + ",Gdx.input.getY(0): " + Gdx.input.getY(0));
		}
		
		if(Gdx.input.isTouched(1)){//isTouched(1)判断第一个手指是否已经点下去
			/**
			 * Gdx.input.getX(1): 获取第一个手指的x坐标
			 * Gdx.input.getY(1): 获取第一个手指的y坐标
			 */
			System.out.println("-------->Gdx.input.getX(1): " + Gdx.input.getX(1) + ",Gdx.input.getY(1): " + Gdx.input.getY(1));
		}
		
		if(Gdx.input.isTouched(2)){
			System.out.println("-------->Gdx.input.getX(2): " + Gdx.input.getX(2) + ",Gdx.input.getY(2): " + Gdx.input.getY(2));
		}
	}

	@Override
	public void resize(int arg0, int arg1) {
		// TODO Auto-generated method stub

	}

	@Override
	public void resume() {
		// TODO Auto-generated method stub

	}

}

三、源码下载

http://download.youkuaiyun.com/detail/caihongshijie6/7041093