Service2PlayService

1.新建工程PlayService

2.设置main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >

    <Button
    android:id="@+id/start"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="Start Play"
    />

    <Button
    android:id="@+id/stop"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="Stop Play"
    />

</LinearLayout>

3.新建Music.java

package com.iceskysl.PlayService;

import android.app.Service;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.IBinder;

public class Music extends Service {
    private MediaPlayer player;

    @Override
    public IBinder onBind(Intent intent) {
        // TODO Auto-generated method stub
        return null;
    }

    public void onStart(Intent intent, int startId) {
        super.onStart(intent, startId);
        player = MediaPlayer.create(this, R.raw.gequ);
        player.start();
    }

    public void onDestroy() {
        super.onDestroy();
        player.stop();
    }

}

4.修改PlayService.java

package com.iceskysl.PlayService;

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 PlayService extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Button button1 = (Button)findViewById(R.id.start);
        button1.setOnClickListener(startIt);
        Button button2 = (Button)findViewById(R.id.stop);
        button2.setOnClickListener(stopIt);
    }

    private OnClickListener startIt = new OnClickListener()
    {
        public void onClick(View v)
        {
            startService(new Intent("com.iceskysl.PlayService.START_AUDIO_SERVICE"));
        }
    };

    private OnClickListener stopIt = new OnClickListener()
    {
        public void onClick(View v)
        {
            stopService(new Intent("com.iceskysl.PlayService.START_AUDIO_SERVICE"));
            finish();
        }
    };
}

5.注册service

  <service android:name=".Music">
   <intent-filter>
    <action android:name="com.iceskysl.PlayService.START_AUDIO_SERVICE" />
    <category android:name="android.intent.category.default" />
   </intent-filter>
  </service>

6.加入资源/res/raw/gequ.mp3

当单击按钮启动播放Service后，在后台播放音乐，当执行其他操作时也不会打断音乐播放。