彻底明白Android中AIDL及其使用

Note: Using AIDL is necessary only if you allow clients from different applications to access your service for IPC and want to handle multithreading in your service. If you do not need to perform concurrent IPC across different applications, you should create your interface by implementing a Binder or, if you want to perform IPC, but do not need to handle multithreading, implement your interface using a Messenger. Regardless, be sure that you understand Bound Services before implementing an AIDL.

// IRemoteService.aidl
package com.example.android;

// Declare any non-default types here with import statements

/** Example service interface */
interface IRemoteService {
    /** Request the process ID of this service, to do evil things with it. */
    int getPid();

    /** Demonstrates some basic types that you can use as parameters
     * and return values in AIDL.
     */
    void basicTypes(int anInt, long aLong, boolean aBoolean, float aFloat,
            double aDouble, String aString);
}

package com.example.service;

import com.example.android.IRemoteService;

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

public class DDService extends Service {
	@Override
	public void onCreate() {
		super.onCreate();
		System.out.println("DDService onCreate........" + "Thread: " + Thread.currentThread().getName());
	}
	@Override
	public IBinder onBind(Intent arg0) {
		System.out.println("DDService onBind");
		return mBinder;
	}

	private final IRemoteService.Stub mBinder = new IRemoteService.Stub() {
	    public int getPid(){
	    	System.out.println("Thread: " + Thread.currentThread().getName());
	    	System.out.println("DDService getPid ");
	        return Process.myPid();
	    }
	    public void basicTypes(int anInt, long aLong, boolean aBoolean,
	        float aFloat, double aDouble, String aString) {
	    	System.out.println("Thread: " + Thread.currentThread().getName());
	    	System.out.println("basicTypes aDouble: " + aDouble +" anInt: " + anInt+" aBoolean " + aBoolean+" aString " + aString);
	    }
	};

}

package com.example.aidlclient;

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.Process;
import android.os.RemoteException;
import android.view.View;

import com.example.android.IRemoteService;

public class MainActivity extends Activity {
	private IRemoteService remoteService;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
    
    ServiceConnection conn = new ServiceConnection() {
		
		@Override
		public void onServiceDisconnected(ComponentName name) {
		}
		
		@Override
		public void onServiceConnected(ComponentName name, IBinder service) {
			remoteService =	IRemoteService.Stub.asInterface(service);
			try {
				int pid = remoteService.getPid();
				int currentPid = Process.myPid();
				System.out.println("currentPID: " + currentPid +"  remotePID: " + pid);
				remoteService.basicTypes(12, 1223, true, 12.2f, 12.3, "我们的爱，我明白");
			} catch (RemoteException e) {
				e.printStackTrace();
			}
			System.out.println("bind success! " + remoteService.toString());
		}
	};
		
    /**
     * 监听按钮点击
     * @param view
     */
    public void buttonClick(View view) {
    	System.out.println("begin bindService");
    	Intent intent = new Intent("duanqing.test.aidl");
    	bindService(intent, conn, Context.BIND_AUTO_CREATE);
    }

    @Override
    protected void onDestroy() {
    	super.onDestroy();
    	unbindService(conn);
    }
}