MyServiceUtil.java代码如下：
package org.lxh.demo;import android.app.Service;import android.content.Intent;import android.os.IBinder;public class MyServiceUtil extends Service {//继承Service类 @Override public IBinder onBind(Intent arg0) { return null; } @Override public void onCreate() { System.out.println("***Service onCreate()"); } @Override public void onDestroy() { System.out.println("***Service onDestory()"); } @Override public int onStartCommand(Intent intent, int flags, int startId) { System.out.println("***Service onStart()-->Intent=" + intent + ",startId=" + startId); return Service.START_CONTINUATION_MASK;//继续执行Service }}main.xml代码如下：<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <Button android:id="@+id/start" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="启动Service" /> <Button android:id="@+id/stop" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="停止Service" /></LinearLayout>
.java代码如下：
package org.lxh.demo;import android.app.Activity;import android.app.AlertDialog;import android.app.Dialog;import android.content.DialogInterface;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.view.View.OnFocusChangeListener;import android.widget.Button;import android.widget.EditText;import android.widget.TextView;public class Hello extends Activity { private Button start = null; private Button stop = null; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // 生命周期方法 super.setContentView(R.layout.main); // 设置要使用的布局管理器 this.start = (Button) super.findViewById(R.id.start); this.stop = (Button) super.findViewById(R.id.stop); this.start.setOnClickListener(new StartOnClickListener()); this.stop.setOnClickListener(new StopOnClickListener()); } private class StartOnClickListener implements OnClickListener { public void onClick(View arg0) { Hello.this .startService(new Intent(Hello.this, MyServiceUtil.class)); } } private class StopOnClickListener implements OnClickListener { public void onClick(View arg0) { Hello.this.stopService(new Intent(Hello.this, MyServiceUtil.class)); } }}需要配置权限：
<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android" package="org.lxh.demo" android:versionCode="1" android:versionName="1.0"> <uses-sdk android:minSdkVersion="10" /> <application android:icon="@drawable/icon" android:label="@string/app_name"> <activity android:name=".Hello" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <strong><span style="color:#ff0000;"><service android:name=".MyServiceUtil"></service></span></strong> </application> </manifest>
运行实例如下：
（1）首次单击“启动service”按钮
01-25 09:58:00.058: I/System.out(692): ***Service onCreate()
01-25 09:58:00.058: I/System.out(692): ***Service onStart()-->Intent=Intent { cmp=org.lxh.demo/.MyServiceUtil },startId=1
（2）重复单击“启动service”
01-25 10:06:06.227: I/System.out(727): ***Service onStart()-->Intent=Intent { cmp=org.lxh.demo/.MyServiceUtil },startId=2
（3）单击“结束service”
01-25 10:06:10.647: I/System.out(727): ***Service onDestory()
打开正在运行的程序可以看到：
