13: Detailed explanation of aidl\service

Directory structure: (the package name path and service on the client side must be the same)

1: client side: service side:

 

 

2：client端AIDLTest.aidl

package com.example.aidl;
interface AIDLTest{
    String hello(String name);
}

MainActivity:

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.RemoteException;
import android.util.Log;
import android.view.Menu;
import android.widget.Toast;

import com.example.aidl.AIDLTest;


// If you just want to start a background service for a long-term task, then use startService. If you also want to get in touch with the running Service, there are two ways: one is to use broadcast, and the other is to use bindService. The disadvantage of the former is that if the communication is more frequent, it is easy to cause performance problems, while the latter does not have these problems. Therefore, in this case, startService and bindService need to be used together. 
public  class MainActivity extends Activity {
    AIDLTest RemoteService; // Listening service 
    private ServiceConnection mConnection = new ServiceConnection() {
        
        @Override
        public void onServiceDisconnected(ComponentName arg0) {
            Log.d("yjm", "1111111111111111111111");
            // TODO Auto-generated method stub
            
        }
        
        @Override
        public void onServiceConnected(ComponentName arg0, IBinder arg1) {
            Log.d("yjm", "2222222222222222222");
            // TODO Auto-generated method stub
            RemoteService = AIDLTest.Stub.asInterface(arg1);
            try {
                String string = RemoteService.hello("aaaaaaaaaaaaaa");
                Toast.makeText(MainActivity.this, string, Toast.LENGTH_LONG).show();
                Log.d("yjm", "QQQQQQQ"+string);
            } catch (RemoteException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            
        }
    };

    @Override
    protected  void onCreate (Bundle savedInstanceState) {
         super .onCreate (savedInstanceState);
        setContentView(R.layout.activity_main);
        Log.d("yjm", "DDDDDDDDDDDD");
        initservice ();
    }
    
    // Connection service 
    public  void initservice(){
         /* Intent i = new Intent();
         i.setAction("android.intent.action.AIDLService");*/
        //Intent i = new Intent(MainActivity.this, AIDLTest.class);
        //Intent i = new Intent("android.intent.action.AIDLService");
         Intent i = new Intent();
         i.setAction("android.intent.action.AIDLService");
         i.setPackage("com.example.aidl.AIDLService");
         try {
            Thread.sleep(500);
        } catch (InterruptedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
         boolean ret = bindService(i, mConnection, Context.BIND_AUTO_CREATE);
    }
    
     // Disconnect the service 
    private  void releaseService() {
        unbindService(mConnection);
        mConnection = null;
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

}

 

3:service端AIDLTest.aidl

package com.example.aidl;
interface AIDLTest{
    String hello(String name);
}

 MainActivity:

package com.example.aidlservice;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;

public class MainActivity extends Activity {
    private Intent intent;

    @Override
    protected  void onCreate (Bundle savedInstanceState) {
         super .onCreate (savedInstanceState);
        setContentView(R.layout.activity_main);
        intent = new Intent(MainActivity.this, MusicPlayerService.class);
        startService(intent);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
     @Override  
        public  void onDestroy () {  
             super .onDestroy ();  
            stopService(intent);
        }  

}

 

 AIDLService:

package com.example.service;

import com.example.aidl.AIDLTest;

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

public class AIDLService extends Service{

    @Override
    public IBinder onBind(Intent arg0) {
        /*return new AIDLTest.Stub() {
            
            @Override
            public String hello(String name) throws RemoteException {
                // TODO Auto-generated method stub
                return "hello"+name;
            }
        }; * / 
        return mBinder;
    }
    
    // A class that inherits Binder, then its object can be used by remote processes (provided that the remote process obtains the object of this class [object reference] 
    private  final AIDLTest.Stub mBinder = new AIDLTest.Stub() {
        
        @Override
        public String hello(String name) throws RemoteException {
            // TODO Auto-generated method stub
            return "hello"+name;
        }
    };

}