详解Android中Service服务的基础知识及编写方法

/** 
  * 链接到service时触发。 
  * name 链接到service组件的名称 
  * service 在service中调用onBund时返回的IBinder,主要用来进行信息的交流 
  */ 
 @Override 
 public void onServiceConnected(ComponentName name, IBinder service) { 
  Log.i("通知", "链接成功！"); 
  MyBinder binder = (MyBinder)service; 
  MyService myService = binder.getMyService(); 
  int count = myService.getCount(); 
  Log.i("通知", "count="+count); 
   
 } 

<!-- 
 service配置开始
 -->
 <service android:name="MyService"></service>
<!-- 
 service配置结束
 -->

package cn.com.chenzheng_java; 
 
import cn.com.chenzheng_java.MyService.MyBinder; 
import android.app.Activity; 
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; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
/** 
 * @description 对service进行简单的应用 
 */ 
public class ServiceActivity extends Activity implements OnClickListener{ 
 private Button button_start ; 
 private Button button_bind ; 
 private Button button_destroy ; 
 private Button button_unbind; 
 
 @Override 
 protected void onCreate(Bundle savedInstanceState) { 
  super.onCreate(savedInstanceState); 
  setContentView(R.layout.service); 
   
  button_start = (Button) findViewById(R.id.button1_service); 
  button_bind = (Button) findViewById(R.id.button2_service); 
  button_destroy = (Button) findViewById(R.id.button3_service); 
  button_unbind = (Button) findViewById(R.id.button4_service); 
   
  button_start.setOnClickListener(this); 
  button_bind.setOnClickListener(this); 
  button_destroy.setOnClickListener(this); 
  button_unbind.setOnClickListener(this); 
   
 } 
 
 private class MyServiceConnection implements ServiceConnection{ 
 
  /** 
   * 链接到service时触发。 
   * name 链接到service组件的名称 
   * service 在service中调用onBund时返回的IBinder,主要用来进行信息的交流 
   */ 
  @Override 
  public void onServiceConnected(ComponentName name, IBinder service) { 
   Log.i("通知", "链接成功！"); 
   MyBinder binder = (MyBinder)service; 
   MyService myService = binder.getMyService(); 
   int count = myService.getCount(); 
   Log.i("通知", "count="+count); 
    
  } 
 
  @Override 
  public void onServiceDisconnected(ComponentName name) { 
   Log.i("通知", "链接未成功！"); 
  } 
   
 } 
  
 private MyServiceConnection serviceConnection = new MyServiceConnection(); 
 @Override 
 public void onClick(View v) { 
  if(v == button_start){ 
   Intent intent = new Intent(); 
   intent.setClass(getApplicationContext(), MyService.class); 
   startService(intent); 
  } 
   
  if(v == button_bind){ 
   Intent intent = new Intent(); 
   intent.setClass(getApplicationContext(), MyService.class); 
   bindService(intent,serviceConnection , BIND_AUTO_CREATE); 
  } 
  if(v==button_destroy){ 
   Intent intent = new Intent(); 
   intent.setClass(getApplicationContext(), MyService.class); 
   stopService(intent); 
  } 
  if(v==button_unbind){ 
   unbindService(serviceConnection); 
  }   
   
 } 
  
} 

package cn.com.chenzheng_java; 
 
import android.app.Service; 
import android.content.Intent; 
import android.media.MediaPlayer; 
import android.os.Binder; 
import android.os.IBinder; 
import android.util.Log; 
 
/** 
 * @description 实现自己的service 
 * @author chenzheng_java 
 * @since 2011/03/18 
 */ 
public class MyService extends Service { 
 MediaPlayer mediaPlayer; 
 
 /** 
  * 当用户调用bindService方法时会触发该方法 返回一个IBinder对象，我们可以通过该对象，对service中 的某些数据进行访问 
  */ 
 @Override 
 public IBinder onBind(Intent intent) { 
  Log.i("通知", "service绑定成功！"); 
  return new MyBinder(); 
 } 
 
 @Override 
 public void onCreate() { 
  Log.i("通知", "service创建成功！"); 
 
  mediaPlayer = MediaPlayer.create(this, R.raw.aiweier); 
  mediaPlayer.setLooping(false); 
  super.onCreate(); 
 } 
 
 @Override 
 public void onDestroy() { 
  mediaPlayer.stop(); 
  Log.i("通知", "service销毁成功！"); 
  super.onDestroy(); 
 } 
 
 @Override 
 public void onRebind(Intent intent) { 
  Log.i("通知", "service重新绑定成功！"); 
  super.onRebind(intent); 
 } 
 
 @Override 
 public void onStart(Intent intent, int startId) { 
  mediaPlayer.start(); 
  Log.i("通知", "service start成功！"); 
  super.onStart(intent, startId); 
 } 
 
 @Override 
 public boolean onUnbind(Intent intent) { 
  mediaPlayer.stop(); 
  Log.i("通知", "service解绑成功！"); 
  return super.onUnbind(intent); 
 } 
 
 private int count = 100; 
 
 public int getCount() { 
  return count; 
 } 
 
 public void setCount(int count) { 
  this.count = count; 
 } 
 
 public class MyBinder extends Binder { 
  /** 
   * @return 返回一个个人的service对象 
   */ 
  MyService getMyService() { 
   return MyService.this; 
  } 
 } 
 
} 

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout 
 xmlns:android="http://schemas.android.com/apk/res/android" 
 android:layout_width="match_parent" 
 android:layout_height="match_parent"> 
 <Button android:text="启动" android:id="@+id/button1_service" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button> 
 <Button android:text="绑定" android:id="@+id/button2_service" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button> 
 <Button android:text="销毁" android:id="@+id/button3_service" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button> 
 <Button android:text="解绑" android:id="@+id/button4_service" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button> 
</LinearLayout> 

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
  package="cn.com.chenzheng_java" 
  android:versionCode="1" 
  android:versionName="1.0"> 
 <uses-sdk android:minSdkVersion="8" /> 
 
 <application android:icon="@drawable/icon" android:label="@string/app_name"> 
  <activity android:name="ServiceActivity" 
     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配置开始 
 --> 
 <service android:name="MyService"></service> 
<!-- 
 service配置结束 
 --> 
 </application> 
 </manifest>