/* 
 * @author:conowen 
 * @date:12.3.01 
 * 
 */ 
package com.conowen.sharedpreferences; 
 
import android.app.Activity; 
import android.content.Intent; 
import android.os.Bundle; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
 
public class SharedPreferencesActivity extends Activity { 
  /** Called when the activity is first created. */ 
  @Override 
  public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 
    Button play = (Button) findViewById(R.id.play);  
    Button pause = (Button) findViewById(R.id.pause);  
  
    final Intent intent = new Intent(SharedPreferencesActivity.this,service.class);  
    // 定義intent為final，全局變量，供下面兩個(gè)匿名內(nèi)部類(lèi)（onclicklisenter）使用  
    play.setOnClickListener(new OnClickListener() {  
  
      @Override  
      public void onClick(View v) {  
        // TODO Auto-generated method stub  
        startService(intent);  
        // 開(kāi)始播放，通過(guò)前面定義好的intent傳遞  
  
      }  
    });  
    pause.setOnClickListener(new OnClickListener() {  
  
      @Override  
      public void onClick(View v) {  
        // TODO Auto-generated method stub  
        stopService(intent);  
        // 停止播放  
  
      }  
    });  
     
  } 
} 

 /* 
 * @author:conowen 
 * @date:12.3.01 
 * 
 */ 
package com.conowen.sharedpreferences; 
 
import android.app.Service; 
import android.content.Intent; 
import android.content.SharedPreferences; 
import android.media.MediaPlayer; 
import android.os.IBinder; 
 
public class service extends Service { 
 
  MediaPlayer player; 
 
  // 新建播放器 
 
  @Override 
  public void onCreate() { 
    // TODO Auto-generated method stub 
    super.onCreate(); 
    player = MediaPlayer.create(this, R.raw.lt26); 
    player.setLooping(true); 
    // 兩種方式的第一個(gè)生命周期都是onCreate（） 
  } 
 
  @Override 
  public void onStart(Intent intent, int startId) { 
    // TODO Auto-generated method stub 
    super.onStart(intent, startId); 
    SharedPreferences sp = this.getSharedPreferences("music_progress", 
        MODE_PRIVATE); 
    // music_progress為XML文件的文件名 
    player.seekTo(sp.getInt("progress", 0)); 
    // progress為鍵值對(duì)中的key，progress所對(duì)應(yīng)的值通過(guò)player.getCurrentPosition()獲得，請(qǐng)看下面詳細(xì) 
    // 每次調(diào)用onStart方法時(shí)，就會(huì)設(shè)置player的進(jìn)度 
    // MediaPlayer的seekTo方法，讀取進(jìn)度，然后播放，getInt的第一個(gè)參數(shù)是所要讀取的key名字，第二個(gè)參數(shù)為默認(rèn)初始值。也就是說(shuō)進(jìn)度初始默認(rèn)為0 
    player.start(); 
  } 
 
  @Override 
  public void onDestroy() { 
    // TODO Auto-generated method stub 
    super.onDestroy(); 
    SharedPreferences sp = this.getSharedPreferences("music_progress", 
        MODE_PRIVATE); 
    sp.edit().putInt("progress", player.getCurrentPosition()).commit(); 
    // player.getCurrentPosition()方法獲取播放進(jìn)度的數(shù)據(jù) 
    // commit()方法是保存SharedPreferences獲取來(lái)的數(shù)據(jù) 
    player.stop(); 
  } 
 
  @Override 
  public IBinder onBind(Intent intent) { 
    // TODO Auto-generated method stub 
    return null; 
  } 
 
} 

<?xml version='1.0' encoding='utf-8' standalone='yes' ?> 
<map> 
<int name="progress" value="90695" /> 
</map>