Android双进程守护

#Android双进程守护| 来源: 网络整理| 查看: 265

双进程守护：开两个服务，一个是本地进程服务localservice，一个是远程进程服务remoteservice，同时使用aidl来进行通信，在onstartcommand方法里启动并绑定服务，在各自的serverconnection里监听对方服务是否被kill，一旦监测到被kill，立马start对方服务，在ondestroy中解绑服务，代码逻辑写在onstartcommand方法里

以上是我理解的双进程守护，如有错误，还望路过的大佬指出，小弟在此先行谢过测试机型：小米Note3 系统版本：Android 9

一、单进程服务

正常情况下只开一个本地服务的话，代码如下

public class LocalService extends Service { private Vibrator vibrator; @Override public IBinder onBind(Intent intent) { return null; } public LocalService() { } @Override public void onCreate() { super.onCreate(); vibrator = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE); } @Override public int onStartCommand(Intent intent, int flags, int startId) { System.out.println("LocalService onStartCommand: LocalService 启动"); Toast.makeText(LocalService.this, " 本地服务started", Toast.LENGTH_SHORT).show(); new Thread(new BackgroundRun()).start(); return START_STICKY; } class BackgroundRun implements Runnable { @Override public void run() { while (true) { System.out.println("Background Run ......"); vibrator.vibrate(500); try { Thread.sleep(10000); } catch (InterruptedException e) { e.printStackTrace(); } } } }

然后在manifest中配置

再到Application中去启动service

public class MyApp extends Application { @Override public void onCreate() { super.onCreate(); if (isMainProcess(getApplicationContext())) { startService(new Intent(this, LocalService.class)); } else { return; } } /** * 获取当前进程名 */ public String getCurrentProcessName(Context context) { int pid = android.os.Process.myPid(); String processName = ""; ActivityManager manager = (ActivityManager) context.getApplicationContext().getSystemService (Context.ACTIVITY_SERVICE); for (ActivityManager.RunningAppProcessInfo process : manager.getRunningAppProcesses()) { if (process.pid == pid) { processName = process.processName; } } return processName; } /** * 是否为主进程 */ public boolean isMainProcess(Context context) { boolean isMainProcess; isMainProcess = context.getApplicationContext().getPackageName().equals (getCurrentProcessName(context)); return isMainProcess; }

以上代码运行后，控制台会每隔10秒打印一条日志，震动0.5秒，此时如果把应用退到后台运行，或者直接息屏，那么一分钟后，日志将不再打印，震动也同时停止，因为此时服务已被系统kill掉了

二、双进程守护

对localservice添加一些代码

MyBinder binder; @Override public IBinder onBind(Intent intent) { binder = new MyBinder(); return binder; } 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) { System.out.println("LocalService onStartCommand: LocalService 启动"); Toast.makeText(LocalService.this, " 本地服务started", Toast.LENGTH_SHORT).show(); new Thread(new BackgroundRun()).start(); startService(new Intent(LocalService.this, RemoteService.class)); bindService(new Intent(LocalService.this, RemoteService.class), conn, Context.BIND_IMPORTANT); return START_STICKY; } private ServiceConnection conn = new ServiceConnection() { @Override public void onServiceConnected(ComponentName name, IBinder service) { IMyAidlInterface iMyAidlInterface = IMyAidlInterface.Stub.asInterface(service); try { System.out.println( "LocalService connected with " + iMyAidlInterface.getServiceName()); //TODO whh 本地service被拉起，检测如果mainActivity不存在则拉起 if (MyApp.getMainActivity() == null) { Intent intent = new Intent(LocalService.this.getBaseContext(), MainActivity.class); intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); getApplication().startActivity(intent); } } catch (RemoteException e) { e.printStackTrace(); } } @Override public void onServiceDisconnected(ComponentName name) { Toast.makeText(LocalService.this, "远程服务killed", Toast.LENGTH_SHORT).show(); System.out.println( "LocalService 远程服务killed"); //开启远程服务 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) { LocalService.this.startForegroundService(new Intent(LocalService.this, RemoteService.class)); } else { LocalService.this.startService(new Intent(LocalService.this, RemoteService.class)); } // LocalService.this.startService((new Intent(LocalService.this, RemoteService.class))); //绑定远程服务 LocalService.this.bindService(new Intent(LocalService.this, RemoteService.class), conn, Context.BIND_IMPORTANT); } }; @Override public void onDestroy() { unbindService(conn); super.onDestroy(); }

MyApp中也要添加一些代码，MainActivity就是manifest配置的入口类

public static MainActivity getMainActivity() { return mainActivity; }

新建一个aidl文件在这里插入图片描述

// IMyAidlInterface.aidl package com.xmliu.locationdemo; // Declare any non-default types here with import statements interface IMyAidlInterface { String getServiceName(); }

之后clean项目，会生成aidl相关文件供调用接下来看远程服务remoteservice

package com.xmliu.locationdemo.service; import android.app.Notification; import android.app.Service; import android.content.ComponentName; import android.content.Context; import android.content.Intent; import android.content.ServiceConnection; import android.os.Build; import android.os.IBinder; import android.os.RemoteException; import android.widget.Toast; import com.xmliu.locationdemo.IMyAidlInterface; /** * Date: 2019/11/13 10:47 * Email: [email protected] * Author: diyan * Description: TODO */ public class RemoteService extends Service { MyBinder binder; public RemoteService() { } @Override public IBinder onBind(Intent intent) { binder = new MyBinder(); return binder; } @Override public void onCreate() { super.onCreate(); startForeground(1,new Notification()); } @Override public int onStartCommand(Intent intent, int flags, int startId) { System.out.println("RemoteService 远程服务started"); 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 RemoteService.class.getSimpleName(); } } private ServiceConnection conn = new ServiceConnection() { @Override public void onServiceConnected(ComponentName name, IBinder service) { IMyAidlInterface iMyAidlInterface = IMyAidlInterface.Stub.asInterface(service); try { System.out.println("RemoteService connected with " + iMyAidlInterface.getServiceName()); } catch (RemoteException e) { e.printStackTrace(); } } @Override public void onServiceDisconnected(ComponentName name) { System.out.println("RemoteService 本地服务killed"); Toast.makeText(RemoteService.this, "本地服务killed", Toast.LENGTH_SHORT).show(); //开启本地服务 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) { RemoteService.this.startForegroundService(new Intent(RemoteService.this, LocalService.class)); } else { RemoteService.this.startService(new Intent(RemoteService.this, LocalService.class)); } // RemoteService.this.startService(new Intent(RemoteService.this, LocalService.class)); //绑定本地服务 RemoteService.this.bindService(new Intent(RemoteService.this, LocalService.class), conn, Context.BIND_IMPORTANT); } }; @Override public void onDestroy() { unbindService(conn); super.onDestroy(); } }

manifest中添加配置

注意点：

startservice要区分api版本使用不同方法，不然会报错Not allowed to start service Intentbindservice后记得在ondestroy中解绑服务，不然会报错that was originally bound here

三、参考博文

android双进程守护，让程序崩溃后一定可以重启Android 双进程守护（分分钟实现）android双进程守护（aidl通信）Android Service保活方法总结（不被杀死）双进程守护Android实现双进程守护Android SERVICE后台服务进程的守护

【本文地址】

Android双进程守护

Android双进程守护

今日新闻

推荐新闻