package com.itheima.doubleclick;import android.os.Bundle;import android.os.SystemClock;import android.app.Activity;import android.view.Menu;import android.view.View;import android.widget.Toast;public class MainActivity extends Activity {	long firstClickTime;	@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.activity_main);	}	public void click(View view){		if(firstClickTime>0){			long sencondClickTime = SystemClock.uptimeMillis();			long dtime = sencondClickTime - firstClickTime;			if(dtime<500){				Toast.makeText(this, "双击了", 0).show();			}else{				firstClickTime = 0;			}			return;		}		//cpu运行的事件  开机就开始运行，重新开启就清0重新计算		//解决单击一次之后双击不灵的情况		firstClickTime = SystemClock.uptimeMillis();		new Thread(){			public void run() {				try {					Thread.sleep(500);				} catch (InterruptedException e) {					e.printStackTrace();				}				firstClickTime = 0;			};		}.start();	}}

多次点击事件

package com.itheima.doubleclick;import android.os.Bundle;import android.os.SystemClock;import android.app.Activity;import android.content.Intent;import android.view.Menu;import android.view.View;import android.widget.Toast;public class MainActivity extends Activity {	@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.activity_main);	}	long[] mHits = new long[3];	//三击事件	public void click(View view){		//src 拷贝的源数组		//srcPos 从源数组的那个位置开始拷贝.		//dst 目标数组		//dstPos 从目标数组的那个位子开始写数据		//length 拷贝的元素的个数	  System.arraycopy(mHits, 1, mHits, 0, mHits.length-1);      mHits[mHits.length-1] = SystemClock.uptimeMillis();      if (mHits[0] >= (SystemClock.uptimeMillis()-500)) {         Toast.makeText(this, "恭喜你，3次点击了。", 0).show();      }	}}

多次点击原理：