本文实例为大家分享了Android中使用定时器的三种方法，供大家参考，具体内容如下

图示:

因为都比较简单,所以就直接贴代码(虑去再次点击停止的操作),有个全局的Handler负责接收消息更新UI

第一种方法:Thread.sleep();方法

Runnable runnable = new Runnable() {

@Override

public void run() {

while (true) {

mHandler.sendEmptyMessage(0);

try {

Thread.sleep(1000);

} catch (InterruptedException e) {

e.printStackTrace();

}

}

}

};

new Thread(runnable).start();

}

第二种方法:Handler的postDelay()方法

final Runnable runnable = new Runnable() {

@Override

public void run() {

if (isStart2) {

mHandler.sendEmptyMessage(0);

mHandler.postDelayed(this, 1000);

}

}

};

mHandler.postDelayed(runnable, 1000);

}

第三种:Timer和TimerTask

private Timer timer = new Timer();

private TimerTask timerTask = new TimerTask() {

@Override

public void run() {

mHandler.sendEmptyMessage(0);

}

};

timer.schedule(timerTask, 1000, 1000);

总的来说第三种方法最方便,不易出错,第二种容易忘记添加出发事件.

贴一下完整代码：

布局文件

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:paddingBottom="@dimen/activity_vertical_margin"

android:paddingLeft="@dimen/activity_horizontal_margin"

android:paddingRight="@dimen/activity_horizontal_margin"

android:paddingTop="@dimen/activity_vertical_margin"

tools:context="com.brioal.timertest.MainActivity">

android:id="@+id/main_tv"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_centerHorizontal="true"

android:layout_marginTop="100dp"

android:text="Hello World!" />

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_below="@id/main_tv"

android:layout_marginTop="100dp"

android:gravity="center"

android:orientation="vertical">

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_gravity="center"

android:layout_margin="5dp"

android:onClick="Method1"

android:text="方法1:Thread"

android:textAllCaps="false" />

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_gravity="center"

android:layout_margin="5dp"

android:onClick="Method2"

android:text="方法2:Handler"

android:textAllCaps="false" />

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_gravity="center"

android:layout_margin="5dp"

android:onClick="Method3"

android:text="方法3:Task"

android:textAllCaps="false" />

MainActivity

package com.brioal.timertest;

import android.os.Bundle;

import android.os.Handler;

import android.os.Message;

import android.support.v7.app.AppCompatActivity;

import android.view.View;

import android.widget.TextView;

import java.text.SimpleDateFormat;

import java.util.Timer;

import java.util.TimerTask;

public class MainActivity extends AppCompatActivity {

private TextView mTv;

private Handler mHandler = new Handler() {

@Override

public void handleMessage(Message msg) {

super.handleMessage(msg);

//收到消息后显示当前时间

long current = System.currentTimeMillis();

SimpleDateFormat dateFormat = new SimpleDateFormat("HH:mm:ss");

String time = dateFormat.format(current);

mTv.setText(time);

}

};

private Timer timer = new Timer();

private TimerTask timerTask = new TimerTask() {

@Override

public void run() {

mHandler.sendEmptyMessage(0);

}

};

private Thread thread1;

private boolean isStart1 = false;

private boolean isStart2 = false;

private boolean isStart3 = false;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

mTv = (TextView) findViewById(R.id.main_tv);

}

//Thread方法

public void Method1(View view) {

Runnable runnable = new Runnable() {

@Override

public void run() {

while (isStart1) {

mHandler.sendEmptyMessage(0);

try {

Thread.sleep(1000);

} catch (InterruptedException e) {

e.printStackTrace();

}

}

}

};

if (isStart1) {

isStart1 = false;

} else {

isStart1 = true;

thread1 = new Thread(runnable);

thread1.start();

}

}

public void Method2(View view) {

final Runnable runnable = new Runnable() {

@Override

public void run() {

if (isStart2) {

mHandler.sendEmptyMessage(0);

mHandler.postDelayed(this, 1000);

}

}

};

if (isStart2) {

isStart2 = false;

} else {

mHandler.postDelayed(runnable, 1000);

isStart2 = true;

}

}

public void Method3(View view) {

if (isStart3) {

timer.cancel();

isStart3 = false;

} else {

timer.schedule(timerTask, 1000, 1000);

isStart3 = true;

}

}

}

总结完了,完整Github地址:TimerTest

更多内容请点击专题《java定时功能》进行学习。

以上就是定时器使用方法的全部内容，希望能给大家一个参考，也希望大家多多支持脚本之家。