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！