ANDROID笔记:AIDL介绍

package com.example.android_server.aidlService;

import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.os.RemoteException;

import com.example.android_server.aidlService.IStudent.Stub;

public class MyAIDLService extends Service {
    StudentBinder binder=null;
    @Override
    public void onCreate() {
        super.onCreate();
        binder=new StudentBinder();
    }

    @Override
    public IBinder onBind(Intent intent) {
        return binder;
    }

    /**
     * 自定义一个Binder,继承存根类
     * 
     * @author Administrator
     * 
     */
    public class StudentBinder extends Stub {

        @Override
        public int getCount() throws RemoteException {
            return 1;
        }
    }
}

IStudent.aidl

package com.example.android_server.aidlService;
interface IStudent
{
int getCount();
}

在manifest中注册服务:

 <service android:name="com.example.android_server.aidlService.MyAIDLService" >
            <intent-filter>
                <action android:name="com.example.aidlservice" />
            </intent-filter>
        </service>

另一个项目中的调用该Service

package com.example.android_serviceclient;

import android.app.Activity;
import android.content.ComponentName;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.os.RemoteException;
import android.widget.TextView;
import android.widget.Toast;

import com.example.android_server.aidlService.IStudent;
import com.example.android_server.aidlService.IStudent.Stub;

public class MainActivity extends Activity implements Handler.Callback {
    private IStudent iStudent;
    private TextView textView=null;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        textView=(TextView) findViewById(R.id.text);
        
        Intent intent = new Intent();
        intent.setAction("com.example.aidlservice");
        startService(intent);
        bindService(intent, connection, BIND_AUTO_CREATE);
        
        Handler handler = new Handler(this);
        handler.sendEmptyMessageDelayed(1, 2000);

    }
    private ServiceConnection connection = new ServiceConnection() {

        @Override
        public void onServiceDisconnected(ComponentName name) {
        }

        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {
            System.out.println("onServiceConnected");
            iStudent=Stub.asInterface(service);
        }
    };

    @Override
    public boolean handleMessage(Message msg) {
        try {
            textView.setText(iStudent.getCount() +"");
            Toast.makeText(MainActivity.this, "得到的值:"+iStudent.getCount() + "", 200)
                    .show();
        } catch (RemoteException e) {
            e.printStackTrace();
        }
        return false;
    }
}

aidl是Android Interface definition language的缩写，它是一种android内部进程通信接口的描述语言，通过它我们可以定义进程间的通信接口.