案例：
布局：
<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"
>
<ImageButton
android:id="@+id/pause"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="@+id/play"
android:layout_marginLeft="58dp"
android:onClick="pause"
android:layout_toRightOf="@+id/play"
android:src="@android:drawable/ic_media_pause" />
<ImageButton
android:id="@+id/play"
android:onClick="play"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="61dp"
android:layout_marginTop="68dp"
android:src="@android:drawable/ic_media_play" />
</RelativeLayout>
MainActivity，
package com.example.music_service;
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.view.Menu;
import android.view.MenuItem;
import android.view.View;
public class MainActivity extends Activity {
private ServiceConnection conn;
private Player player;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
conn = new InnerServiceConnection();
int flags = BIND_AUTO_CREATE;
Intent service = new Intent(this,PlayService.class);
bindService(service, conn, flags);
}
public void pause(View view){
player.playMusic();
}
public void play(View view){
player.pauseMusic();
}
private class InnerServiceConnection implements ServiceConnection{
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
// TODO Auto-generated method stub
player = (Player) service;
}
@Override
public void onServiceDisconnected(ComponentName name) {
// TODO Auto-generated method stub
}
}
protected void onDestroy(){
unbindService(conn);
super.onDestroy();
}
}
Service：
package com.example.music_service;
import java.io.IOException;
import android.app.Service;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Binder;
import android.os.Environment;
import android.os.IBinder;
public class PlayService extends Service{
private MediaPlayer player;
private int Current;
@Override
public void onCreate() {
// TODO Auto-generated method stub
player = new MediaPlayer();
player.setOnPreparedListener(new InnerPreparedListener());
player.setOnCompletionListener(new InnerCompletionListener());
}
@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return new InnerBinder();
}
public class InnerBinder extends Binder implements Player{
@Override
public void playMusic() {
// TODO Auto-generated method stub
play();
}
@Override
public void pauseMusic() {
pause();
// TODO Auto-generated method stub
}
}
private void play(){
try {
player.reset();
player.setDataSource(Environment.getExternalStorageDirectory().getAbsolutePath() + "/Music/Groove Coverage - She.mp3");
player.prepareAsync();
// player.start();
} catch (IllegalArgumentException e) {
// TODO: handle exception
e.printStackTrace();
}catch(SecurityException e){
e.printStackTrace();
}
catch(IllegalStateException e){
e.printStackTrace();
}
catch(IOException e){
e.printStackTrace();
}
}
private void pause(){
if(player.isPlaying()){
Current = player.getCurrentPosition();
player.pause();
}
}
private class InnerPreparedListener implements MediaPlayer.OnPreparedListener{
@Override
public void onPrepared(MediaPlayer mp) {
// TODO Auto-generated method stub
mp.seekTo(Current);
mp.start();
Current = 0;
}
}
private class InnerCompletionListener implements MediaPlayer.OnCompletionListener{
@Override
public void onCompletion(MediaPlayer mp) {
// TODO Auto-generated method stub
play();
}
}
@Override
public void onDestroy() {
// TODO Auto-generated method stub
player.release();
player = null;
super.onDestroy();
}
}
package com.example.music_service;
public interface Player {
void playMusic();
void pauseMusic();
}
OK，对了，service不要忘了在AndroidMainfest.xml中配置一下原文：http://blog.csdn.net/wojiaohuangyu/article/details/50411463