一个关于server使用 aidl的例子

package com.android.google;

interface IControlMusic

{

void playMusic();

void stopMusic();

void init();

}

以上是IControlMusic的aidl文件

下面的是ControlMusicService service文件

package com.android.google;

import android.app.Service;

import android.content.Intent;

import android.media.MediaPlayer;

import android.os.IBinder;

import android.os.RemoteException;

public class ControlMusicService extends Service {

private  MediaPlayer player;

@Override

public void onCreate() {

// TODO Auto-generated method stub

super.onCreate();

}

@Override

public void onDestroy() {

// TODO Auto-generated method stub

super.onDestroy();

if(player.isPlaying())

{

player.stop();

player.release();

player=null;

}

}

private final IControlMusic.Stub binder=new IControlMusic.Stub()

{

@Override

public void playMusic() throws RemoteException {

// TODO Auto-generated method stub

player=MediaPlayer.create(ControlMusicService.this, R.raw.rain);

player.start();

}

@Override

public void stopMusic() throws RemoteException {

// TODO Auto-generated method stub

if(player.isPlaying())

{

player.stop();

}

}

@Override

public void init() throws RemoteException {

// TODO Auto-generated method stub

player=MediaPlayer.create(ControlMusicService.this, R.raw.rain);

}

};

@Override

public IBinder onBind(Intent intent) {

// TODO Auto-generated method stub

return binder;

}

}

以下是activity文件

package com.android.google;

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.os.RemoteException;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

public class StartServiceActivity extends Activity {

private Button btnPlay, btnStop,btnWraper,btnSearch;

private IControlMusic myIControlMusic;

private Intent intent;

private ServiceConnection serviceConnection = new ServiceConnection() {

@Override

public void onServiceConnected(ComponentName name, IBinder service) {

// TODO Auto-generated method stub

myIControlMusic = IControlMusic.Stub.asInterface(service);

}

@Override

public void onServiceDisconnected(ComponentName name) {

// TODO Auto-generated method stub

myIControlMusic = null;

// StartServiceActivity.this.unbindService(serviceConnection);

}

};

@Override

protected void onCreate(Bundle savedInstanceState) {

// TODO Auto-generated method stub

super.onCreate(savedInstanceState);

this.setContentView(R.layout.startserviceactivity);

binderServer();

btnPlay = (Button) findViewById(R.id.btn_play);

btnStop = (Button) findViewById(R.id.btn_stop);

btnWraper=(Button)findViewById(R.id.btn_wrapper);

btnSearch=(Button)findViewById(R.id.btn_search);

btnSearch.setOnClickListener(clickListener);

btnPlay.setOnClickListener(clickListener);

btnStop.setOnClickListener(clickListener);

btnWraper.setOnClickListener(clickListener);

}

private OnClickListener clickListener = new OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

switch (v.getId()) {

case R.id.btn_play:

// startService(new Intent("com.dream.androidstu.MUSIC"));

try {

myIControlMusic.playMusic();

} catch (RemoteException e1) {

// TODO Auto-generated catch block

e1.printStackTrace();

}

// startService(intent);

break;

case R.id.btn_stop:

// stopService(new Intent("com.dream.androidstu.MUSIC"));

try {

if(myIControlMusic!=null){

myIControlMusic.stopMusic();

}

} catch (RemoteException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

break;

case R.id.btn_wrapper:

Intent intent=new Intent(Intent.ACTION_SET_WALLPAPER);//设置其为action事件

startActivity(Intent.createChooser(intent, "wall"));

break;

case R.id.btn_search:

onSearchRequested();

break;

}

}

};

private void binderServer() {

intent = new Intent();

intent.setClass(this, ControlMusicService.class);

bindService(intent, serviceConnection, BIND_AUTO_CREATE);

}

}

xml文件

<?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"

    >

<TextView  

android:id="@+id/tv_main"

    android:layout_width="fill_parent" 

    android:layout_height="wrap_content" 

    android:text="@string/hello"

    android:textSize="18px"/>

    

<Button 

android:text="播放音乐" 

android:id="@+id/btn_play" 

android:layout_width="wrap_content" 

android:layout_height="wrap_content" />

<Button 

android:text="停止播放" 

android:id="@+id/btn_stop" 

android:layout_width="wrap_content" 

android:layout_height="wrap_content" />

<Button 

android:text="wrapper" 

android:id="@+id/btn_wrapper" 

android:layout_width="wrap_content" 

android:layout_height="wrap_content" />

<Button 

android:text="search" 

android:id="@+id/btn_search" 

android:layout_width="wrap_content" 

android:layout_height="wrap_content" />

</LinearLayout>

总结：activity 是通过 aidl的方法和service进行通信的，所以在activity中要获得service的一个connection，该connection获得一个aidl端的实例，而service端者实现aidl中的方法，这样actiivty就实现和service端的通信了！