Android笔记三十.Service入门(四).跨进程调用Service(AIDL Service)

<span style="font-family:Times New Roman;font-size:18px;">package com.example.aidlservice;
import java.util.Timer;
import java.util.TimerTask;
import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.os.RemoteException;
import com.example.aidlservice.ICat.Stub;
public class AidlService extends Service{
 
  private Timer timer=new Timer();;
  //2.定义两个数组与两个私有变量
  private String color;
  private double weight;
  String[] colors = new String[]{"黑色","黄色","红色"};
  double[] weigths=new double[]{2.3, 3.1,1.58};
  //1.声明一个IBinder对象、Timer对象
  private CatBinder binder= new CatBinder();
  //3.继承stub,也就实现了ICat接口，并实现了IBinder接口
  public class CatBinder extends Stub
  {
   @Override
   public String getColor() throws RemoteException {
    return color;
   }
   @Override
   public double getWeight() throws RemoteException {
    return weight;
   }
 
  }
  //4.当Service创建时调用该方法
  @Override
  public void onCreate() {
   System.out.println("调用Service的onCreate方法");
   super.onCreate();
   //b.该service完成的任务:随机地改变Service组件内color、weight属性的值
   timer.schedule(new TimerTask(){
     @Override
     public void run()
     {
       int rand=(int)(Math.random()*3);
       color=colors[rand];
       weight = weigths[rand];
       System.out.println("-----------"+rand);
     }  }, 0, 800);
  }
  /*5.访问者使用bindService()方法启动Service时，该方法用于返回catBinder对象
   * (1)在绑定本地Service的情况下，该catBinder对象会直接传给客户端的ServiceConnection对象;
   * (2)在绑定远程Service的情况下，只将catBinder对象的代理传递给客户端的ServiceConnection对象的
   * onServiceConnection方法的第二个参数*/
  @Override
  public IBinder onBind(Intent intent) {
   System.out.println("返回Service的IBinder对象");
   return binder;
  }
  //6.回调该方法关闭Service
  @Override
  public void onDestroy() {
   timer.cancel();
  }
}</span>

<span style="font-family:Times New Roman;font-size:18px;"><?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.aidlservice"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="14" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".ServiceTest"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <!-- 注册service服务 -->
       <service android:name=".AidlService">
            <intent-filter>
                    <action android:name="com.jiangdongguo.service"/>
            </intent-filter>
        </service>
    </application>

</manifest></span>

<span style="font-family:Times New Roman;font-size:18px;">package com.example.aidlclient;
import android.app.Activity;
import android.app.Service;
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;
import android.widget.TextView;
import com.example.aidlservice.ICat;
public class AidlClient extends Activity {
  private ICat catService;	//声明一个ICat对象
  private Button get;
  private TextView color,weight;
 
  //1.创建一个ServiceConnection对象
  private ServiceConnection conn=new ServiceConnection(){
   @Override
   public void onServiceConnected(ComponentName name, IBinder service) {
    //获取远程Service的onBind方法的对象的代理
    catService = ICat.Stub.asInterface(service);
   }
   @Override
   public void onServiceDisconnected(ComponentName name) {
   }
  };
 
  //2.绑定远程Service并获取其内容
  @Override
  protected void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   //a.获取Activity主界面组件
   setContentView(R.layout.main);
   get=(Button)findViewById(R.id.get);
   color=( TextView)findViewById(R.id.color);
   weight=(TextView)findViewById(R.id.weight);
 
   //b.创建所需绑定的Service的Intent并设置其Action属性(即指定启动哪个远程Service)
   Intent intent=new Intent("com.jiangdongguo.service");
   //c.绑定并启动远程Service
   bindService(intent,conn,Service.BIND_AUTO_CREATE);
   //d.通过IBinder对象的代理获取远程Service数据
   get.setOnClickListener(new OnClickListener(){
     @Override
     public void onClick(View v)
     {
          try
          {
           color.setText("颜色："+catService.getColor());
           weight.setText("比重："+catService.getWeight());
          }
          catch (RemoteException e) {
           e.printStackTrace();
          }
     
     }
    });
  }
  //3.退出Activity时调用该方法，解除远程Service的绑定
  @Override
  protected void onDestroy() {
   super.onDestroy();
   this.unbindService(conn);
  }
}</span>