Android 双进程守护（分分钟实现）

是这个情况，前几天在腾讯公开课看到的，确实不错，首先我先说下怎么实现的？

**实现思路：**创建A,B两个服务，然后同时启动A、B服务，双进程守护，当然要另开一个进程，通过AIDL实现跨进程通信，在A、B服务中的onStartCommand方法中，互相绑定对方，然后我们想想，服务如果被强杀了怎么办，接下来是关键：我们实现ServiceConnection这个接口，在onServiceDisconnected方法中重新绑定并且start服务（被kill的service）这样每次killservice都会走到这个方法里面，哈哈，服务就被重启了，MDZZ很强势有没有？还有谁？我就想问下。

对了还有web视频要看，先不吹B，直接上代码：

---

本地服务code：

package app.project.service;

import android.app.Service;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.IBinder;
import android.os.RemoteException;
import android.support.annotation.Nullable;
import android.util.Log;
import android.widget.Toast;

import app.project.IMyAidlInterface;

public class LocalService extends Service {
    MyBinder binder;
    MyConn conn;

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

    @Override
    public void onCreate() {
        super.onCreate();
        binder = new MyBinder();
        conn = new MyConn();
    }

    class MyBinder extends IMyAidlInterface.Stub {
        @Override
        public String getServiceName() throws RemoteException {
            return LocalService.class.getSimpleName();
        }
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        Toast.makeText(LocalService.this, " 本地服务started", Toast.LENGTH_SHORT).show();
        this.bindService(new Intent(LocalService.this, RomoteService.class), conn, Context.BIND_IMPORTANT);
        return START_STICKY;
    }

    class MyConn implements ServiceConnection {
        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {
        }

        @Override
        public void onServiceDisconnected(ComponentName name) {
            Toast.makeText(LocalService.this, "远程服务killed", Toast.LENGTH_SHORT).show();
            //开启远程服务
            LocalService.this.startService(new Intent(LocalService.this, RomoteService.class));
            //绑定远程服务
            LocalService.this.bindService(new Intent(LocalService.this, RomoteService.class), conn, Context.BIND_IMPORTANT);
        }
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        //开启远程服务
        LocalService.this.startService(new Intent(LocalService.this, RomoteService.class));
        //绑定远程服务
        LocalService.this.bindService(new Intent(LocalService.this, RomoteService.class), conn, Context.BIND_IMPORTANT);

    }
}

远程服务code:

package app.project.service;

import android.app.Service;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.IBinder;
import android.os.RemoteException;
import android.support.annotation.Nullable;
import android.util.Log;
import android.widget.Toast;

import app.project.IMyAidlInterface;

public class RomoteService extends Service {
    MyConn conn;
    MyBinder binder;

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

    @Override
    public void onCreate() {
        super.onCreate();
        conn = new MyConn();
        binder = new MyBinder();
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {

        Toast.makeText(this, " 远程服务started", Toast.LENGTH_SHORT).show();
        this.bindService(new Intent(this, LocalService.class), conn, Context.BIND_IMPORTANT);

        return START_STICKY;
    }

    class MyBinder extends IMyAidlInterface.Stub {
        @Override
        public String getServiceName() throws RemoteException {
            return RomoteService.class.getSimpleName();
        }
    }

    class MyConn implements ServiceConnection {

        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {

        }

        @Override
        public void onServiceDisconnected(ComponentName name) {
            Toast.makeText(RomoteService.this, "本地服务killed", Toast.LENGTH_SHORT).show();

            //开启本地服务
            RomoteService.this.startService(new Intent(RomoteService.this, LocalService.class));
            //绑定本地服务
            RomoteService.this.bindService(new Intent(RomoteService.this, LocalService.class), conn, Context.BIND_IMPORTANT);
        }

    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        //开启本地服务
        RomoteService.this.startService(new Intent(RomoteService.this, LocalService.class));
        //绑定本地服务
        RomoteService.this.bindService(new Intent(RomoteService.this, LocalService.class), conn, Context.BIND_IMPORTANT);

    }
}

aidl文件：

// IMyAidlInterface.aidl
package app.project;

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

interface IMyAidlInterface {
   String getServiceName();
}

这里说下aidl的创建，右键aidl文件，创建完成后看图：

注意啦：一定要clean下项目，保证在gen下生成aidl文件，看图：

配置文件：

  <service
            android:name=".service.LocalService"
            android:enabled="true"
            android:exported="true" />
        <service
            android:name=".service.RomoteService"
            android:process=":romoteservice"
            android:enabled="true"
            android:exported="true">service>

接下来就是在activity里启动A、B服务咯，测试就看你自己咯！