视频地址:http://study.163.com/course/courseLearn.htm?courseId=712011#/learn/video?lessonId=877122&courseId=712011
一、问题:
1、如何做到一个app不同进程通信?
2、多个app通信(不同app)
3、注入事件运行脚本和调用隐藏api
二、一个app不同进程通信:
知识点:
1、Intent、binder
2、Service、Activity
3、Handler、view
4、Messenger、Message、ServiceConnection、IPC(Internal process communication)
5、bundle
6、remote
7、pid
然后接下来说明一下程序实现的原理及过程:
1、定义一个继承自Service的类,使用onBind的生命周期,在服务端定义一个Messenger对象,然后将这个对象的getBinder()通过onBind()方法return给客户端,具体是在绑定的时候会使用到
2、需要给Messenger传递一个Handler对象,需要实现一个继承自Handler类的子类,然后复写HandleMessage()方法,这个就是用来处理从客户端传来的Message,并且根据客户端的内容,做出相应的操作
3、然后在AndroidManifest.xml中注册上面定义的Service类,增加android:process=":remote"
4、然后定义一个客户端程序,如一个Activity类,增加绑定服务和解绑服务的button,然后增加响应时间,主要是调用bindService()方法和unbindService()方法,然后在bindService里面需要使用一个ServiceConnection的对象,需要在定义这个对象的过程中,实现两个方法,分别是onServiceConnected()和onServiceDisconnected(),然后在这里得到Service端的IBinder对象,从而得到Service端的信使,然后通过这个信使,给服务端发消息,服务端就能接收到Msg,之后就会处理这个消息,就是第2步的处理
5、以上实现从客户端到服务端的单向通信,如何实现双向通信?就是在client端依然编写一个Handler类,然后用这个Handler类的对象初始化一个客户端的Messenger对象,然后将本地信使赋值给msg.replyTo,然后服务端Messenger对象.send(msg)就可以将消息发送出去;然后服务端就能获得一个客户端的信使,client和service之间就可以互相通信了。
然后上程序代码:
com.example.twomessengerservice.service中的service程序
package com.example.twomessengerservice.service; import android.app.Service;
import android.content.Intent;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.os.Messenger;
import android.os.RemoteException;
import android.widget.Toast; public class MessengerService extends Service { public static final int SAY_HELLO = 0X1; private Messenger myMessenger = new Messenger(new IncomingHandler()); class IncomingHandler extends Handler{ @Override
public void handleMessage(Message msg) {
// TODO Auto-generated method stub switch(msg.what){
case SAY_HELLO:
Toast.makeText(getApplicationContext(), "service的处理", Toast.LENGTH_SHORT).show(); //当需要返回一个值的时候,通过Message来进行传送
Message newmsg = Message.obtain();
newmsg.what = SAY_HELLO; //从msg.reply中获取到客户端的信使
Messenger cMessenger = msg.replyTo; try{
cMessenger.send(newmsg);
}catch(RemoteException e){
e.printStackTrace();
}
break; default:
break; } super.handleMessage(msg);
} } @Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return myMessenger.getBinder();
} }
com.example.twomessengerservice中的client程序:
package com.example.twomessengerservice; import com.example.twomessengerservice.service.MessengerService; import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.os.Messenger;
import android.os.RemoteException;
import android.app.Activity;
import android.app.Service;
import android.content.ComponentName;
import android.content.Intent;
import android.content.ServiceConnection;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.Toast; public class MainActivity extends Activity { private Button buttonbind;
private Button buttonunbind; boolean isBound = false;
Messenger rMessenger = null;
Messenger mMessenger = null; private final String tag = "Activity"; class mHandler extends Handler{ @Override
public void handleMessage(Message msg) {
// TODO Auto-generated method stub
switch(msg.what){
case MessengerService.SAY_HELLO:
Toast.makeText(MainActivity.this, "client的toast",Toast.LENGTH_SHORT).show();
break;
default:
break;
}
} } ServiceConnection conn = new ServiceConnection() { @Override
public void onServiceDisconnected(ComponentName name) {
// TODO Auto-generated method stub
rMessenger = null;
} @Override
public void onServiceConnected(ComponentName name, IBinder service) {
// TODO Auto-generated method stub
rMessenger = new Messenger(service); //获取到service的信使
mMessenger = new Messenger(new mHandler()); //本地信使
sendMessage();
}
}; protected void sendMessage() {
// TODO Auto-generated method stub
Message msg = Message.obtain(null, MessengerService.SAY_HELLO);
msg.replyTo = mMessenger;
try {
rMessenger.send(msg);
} catch (RemoteException e) {
e.printStackTrace();
}
} @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main); buttonbind = (Button) findViewById(R.id.buttonbind);
buttonunbind = (Button) findViewById(R.id.buttonunbind); buttonbind.setOnClickListener(l);
buttonunbind.setOnClickListener(l); } View.OnClickListener l = new View.OnClickListener() { @Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch(v.getId()){
case R.id.buttonbind:
Toast.makeText(getApplicationContext(), "绑定服务", Toast.LENGTH_SHORT).show();
Log.v(tag, "buttonbind");
isBound = bindService(new Intent(MainActivity.this, MessengerService.class), conn, Service.BIND_AUTO_CREATE);
Toast.makeText(getApplicationContext(), "接收从服务器端的消息", Toast.LENGTH_SHORT).show();
break;
case R.id.buttonunbind:
if(isBound = true){
Log.v(tag, "buttonunbind");
Toast.makeText(getApplicationContext(), "解除绑定", Toast.LENGTH_SHORT).show();
unbindService(conn);
}
break;
default:
break;
}
}
}; @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;
} }
AndroidManifest.xml配置文件:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.twomessengerservice"
android:versionCode="1"
android:versionName="1.0" > <uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="18" /> <application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.twomessengerservice.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity> <service android:name = ".service.MessengerService"
android:process=":remote"></service> </application> </manifest>