案例演示

布局文件

 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     tools:context="${packageName}.${activityClass}" >

     <Button
         android:id="@+id/btn_bind"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_alignParentLeft="true"
         android:layout_below="@+id/btn_stop"
         android:onClick="click"
         android:text="context.bindService" />

     <Button
         android:id="@+id/btn_unbind"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_below="@+id/btn_bind"
         android:onClick="click"
         android:text="context.unbindService" />


 </RelativeLayout>

注冊service

 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.example.android_servicedemo"
     android:versionCode="1"
     android:versionName="1.0" >

     <uses-sdk
         android:minSdkVersion="14"
         android:targetSdkVersion="19" />

     <application
         android:allowBackup="true"
         android:icon="@drawable/ic_launcher"
         android:label="@string/app_name"
         android:theme="@style/AppTheme" >
         <activity
             android:name="com.example.android_servicedemo.MainActivity"
             android:label="@string/app_name" >
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />

                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>

         <service
             android:name="ServiceTese"
             android:permission="com.example.permission.servers" >
             <intent-filter>
                 <action android:name="com.example.serversdemo.action" />
             </intent-filter>
         </service>
     </application>

 </manifest>

主activity

package com.example.android_servicedemo;import android.app.Activity;import android.app.Service;import android.content.ComponentName;import android.content.Intent;import android.content.ServiceConnection;import android.os.Bundle;import android.os.IBinder;import android.util.Log;import android.view.View;public class MainActivity extends Activity {	private Intent service;	MyConn myConn;	public static final String TAG = "MainActivity";	@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.activity_main);		// 隐士意图的启动		service = new Intent();		service.setAction("com.example.serversdemo.action");	}	public void click(View v) {		int id = v.getId();		switch (id) {		case R.id.btn_bind:			// con:该參数是一个ServiceConnection对象。该对象用于监听訪问者与service之间的连接情况			// flag:指定绑定时是否自己主动创建service(假设service还没创建)0：不自己主动创建。BIND_AUTO_CREATE自己主动创建			myConn = new MyConn();			this.bindService(service, myConn, Service.BIND_AUTO_CREATE);			break;		case R.id.btn_unbind:			if (myConn != null) {				this.unbindService(myConn);			}			break;		default:			break;		}	}	class MyConn implements ServiceConnection {		/**		 * 当连接成功的时候回调此方法		 */		@Override		public void onServiceConnected(ComponentName name, IBinder service) {			// TODO Auto-generated method stub			Log.i(TAG, "---------onServiceConnected" + name);		}		/**		 * 当service所在的宿主矜持因为异常终止或因为其它原因终止，导致该service与訪问者之间断开连接的时候回调		 */		@Override		public void onServiceDisconnected(ComponentName name) {			Log.i(TAG, "---------onServiceDisconnected" + name);		}	}}

执行结果

点击context.bindService--->点击context.unbindService。生命周期为

点击context.

bindService--->home键--->点击context.

bindService--->点击context.

bindService..

.--->点击context.stopService

所以仅仅能点击一次unbind

startService生命周期见