在上一篇博客中，我们谈到了Android进程防杀的常用套路，各位童鞋可以点击查看我的博客Android应用进程防杀指南1-常用套路，随着越来越多的用户手机安装某卫士，某管家，常用的进程防杀套路并不能够很好的保证我们的APP进程常驻，因此本篇博客我给大家带来抗某卫士，某管家的双进程守护解决方案。双进程守护，其实原理非常简单，网上也有很多博文讲述，今天我给大家用一个完整的案例来讲述。
假设我们的APP中开启了两个Service，分别是A和B，那么：
如果A守护B，则B挂掉的同时，A就应该把B启动起来，反之亦然，也就是说A和B应该是互相守护，无论谁被杀掉，对方就把它拉起来。
既然提到了两个Service，那么这两个Service就不能让它们同处在一个进程中，否则就会被一次性双杀。这里我们很容易想到IPC技术，在Android中通常我们可以使用AIDL来实现IPC操作。废话不多说，直接撸码。
先来看下项目整体结构：
这里，我们定义两个Service，分别是LocalCastielService和RemoteCastielService，其中的RemoteCastielService我们通过属性配置android:process=”:com.castiel.remote” ，让它成为远端进程。
LocalCastielService.Java
/** * @ClassName: LocalCastielService * @Description: 本地服务 * @author 猴子搬来的救兵 http://blog.csdn.net/mynameishuangshuai * @version */public class LocalCastielService extends Service { MyBinder myBinder; private PendingIntent pintent; MyServiceConnection myServiceConnection; @Override public void onCreate() { super.onCreate(); if (myBinder == null) { myBinder = new MyBinder(); } myServiceConnection = new MyServiceConnection(); } @Override public int onStartCommand(Intent intent, int flags, int startId) { this.bindService(new Intent(this, RemoteCastielService.class), myServiceConnection, Context.BIND_IMPORTANT); Notification notification = new Notification(R.drawable.ic_launcher, "猴子服务启动中", System.currentTimeMillis()); pintent = PendingIntent.getService(this, 0, intent, 0); notification.setLatestEventInfo(this, "猴子服务", "防止被杀掉！", pintent); startForeground(startId, notification); return START_STICKY; } class MyServiceConnection implements ServiceConnection { @Override public void onServiceConnected(ComponentName arg0, IBinder arg1) { Log.i("castiel", "远程服务连接成功"); } @Override public void onServiceDisconnected(ComponentName arg0) { Toast.makeText(LocalCastielService.this, "远程服务Remote被干掉", Toast.LENGTH_LONG).show(); LocalCastielService.this.startService(new Intent(LocalCastielService.this, RemoteCastielService.class)); LocalCastielService.this.bindService(new Intent(LocalCastielService.this, RemoteCastielService.class), myServiceConnection, Context.BIND_IMPORTANT); } } class MyBinder extends CastielProgressConnection.Stub { @Override public String getProName() throws RemoteException { return "Local猴子搬来的救兵 http://blog.csdn.net/mynameishuangshuai"; } } @Override public IBinder onBind(Intent arg0) { return myBinder; }}
RemoteCastielService.java
/** * * @ClassName: RemoteCastielService * @Description: 远程服务 * @author 猴子搬来的救兵 http://blog.csdn.net/mynameishuangshuai */public class RemoteCastielService extends Service { MyBinder myBinder; private PendingIntent pintent; MyServiceConnection myServiceConnection; @Override public void onCreate() { super.onCreate(); if (myBinder == null) { myBinder = new MyBinder(); } myServiceConnection = new MyServiceConnection(); } @Override public int onStartCommand(Intent intent, int flags, int startId) { this.bindService(new Intent(this,LocalCastielService.class), myServiceConnection, Context.BIND_IMPORTANT); Notification notification = new Notification(R.drawable.ic_launcher, "猴子服务启动中", System.currentTimeMillis()); pintent=PendingIntent.getService(this, 0, intent, 0); notification.setLatestEventInfo(this, "猴子服务", "防止被杀掉！", pintent); startForeground(startId, notification); return START_STICKY; } class MyServiceConnection implements ServiceConnection { @Override public void onServiceConnected(ComponentName arg0, IBinder arg1) { Log.i("castiel", "本地服务连接成功"); } @Override public void onServiceDisconnected(ComponentName arg0) { Toast.makeText(RemoteCastielService.this, "本地服务Local被干掉", Toast.LENGTH_LONG).show(); RemoteCastielService.this.startService(new Intent(RemoteCastielService.this,LocalCastielService.class)); RemoteCastielService.this.bindService(new Intent(RemoteCastielService.this,LocalCastielService.class), myServiceConnection, Context.BIND_IMPORTANT); } } class MyBinder extends CastielProgressConnection.Stub { @Override public String getProName() throws RemoteException { return "Remote猴子搬来的救兵 http://blog.csdn.net/mynameishuangshuai"; } } @Override public IBinder onBind(Intent arg0) { return myBinder; }}
aidl文件
package com.castiel.aidlinterface CastielProgressConnection{ String getProName()}
启动服务
public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); startService(new Intent(this, LocalCastielService.class)); startService(new Intent(this, RemoteCastielService.class)); }
通过以上代码可以看出，双进程守护实现代码非常简单，两个服务相互连接，Local服务连接着Remote服务，Remote服务又连接着Local服务，你中有我我中有你，一旦两个服务发现对方被杀掉，另一服务立刻会启动并连接它，下面我给大家演示一下。
查看一下系统打印日志：
