Android中利用AIDL机制调用远程服务

 

服务端:

//CalculateInterface.aidl
package com.itheima.aidl.calculate;

interface CalculateInterface {
double doCalculate(double a, double b);
}



//CalculateService.java
package com.itheima.myaidl.server;

import com.itheima.aidl.calculate.CalculateInterface;

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

public class CalculateService extends Service{
private final CalculateInterface.Stub mBinder = new CalculateInterface.Stub() {
@Override
public double doCalculate(double a, double b) throws RemoteException {
return a+b;
}
};

@Override
public IBinder onBind(Intent intent) {
Log.i("test","onBind...");
return mBinder;
}

@Override
public boolean onUnbind(Intent intent) {
Log.i("test","onUnbind...");
return super.onUnbind(intent);
}

@Override
public void onCreate() {
super.onCreate();
Log.i("test","onCreate...");
}

@Override
public void onDestroy() {
super.onDestroy();
Log.i("test","onDestroy...");
}
}

//服务端manifast文件
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.itheima.myaidl.server"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="14"
        android:targetSdkVersion="19" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity 
            android:name="com.itheima.myaidl.server.MainActivity"
            android:configChanges="locale|layoutDirection"
            android:theme="@android:style/Theme.Light.NoTitleBar"
            android:screenOrientation="portrait">
             <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <service android:name="com.itheima.myaidl.server.CalculateService">
             <intent-filter>
                <action android:name="com.itheima.myaidl.server.CalculateService" />
            </intent-filter>
        </service>
    </application>

</manifest>


//客户端
//MainActivity.java

package com.itheima.myaidl.client;

import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.IBinder;
import android.os.RemoteException;
import android.util.Log;

import com.itheima.aidl.calculate.CalculateInterface;

public class MainActivity extends Activity {
    private CalculateInterface mService;
    
    private ServiceConnection mServiceConnection = new ServiceConnection() {
        @Override
        public void onServiceDisconnected(ComponentName name) {
            Log.i("test","service disconnected...");
            mService = null;
        }
        
        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {
            Log.i("test","service connected...");
            mService = CalculateInterface.Stub.asInterface(service);  //获取接口实例
        }
    };
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        //绑定远程服务
        Bundle bundle = new Bundle();
        Intent intent = new Intent();
        intent.putExtras(bundle);
        intent.setAction("com.itheima.myaidl.server.CalculateService");
        bindService(intent, mServiceConnection, Context.BIND_AUTO_CREATE);
    }
    
    //TODO activity加载完毕时回调此方法
    @Override
    public void onWindowFocusChanged(boolean hasFocus) {
        if(hasFocus){
            try{
                double result = mService.doCalculate(1, 2);
                Log.i("test","result===>"+result);
            }catch(RemoteException e){
                e.printStackTrace();
            }
        }
        super.onWindowFocusChanged(hasFocus);
    }
    
    @Override
    protected void onDestroy() {
        unbindService(mServiceConnection);  //解绑远程服务
        super.onDestroy();
    }
}

运行结果截图: