Android检测Activity或者Service是否运行的方法

需求：假设我们的APP有3个页面AActivity,BActivity,CActivity,我们的APP需要一直运行在前台（特殊设备），要求实现一个监控服务，来监视APP是否运行，如果有3个页面都不运行了就说明这个APP已经挂掉了，否则说明APP在运行状态，不做处理，挂掉之后，我们需要重新启动App来让它继续处理运行状态，对外暴露一个来停止监控服务的广播，这样我们想停止监控服务时，发送一个广播即可。

思路：实现一个双进程的监控服务，服务中写一个定时器 Timer 来重复进行检测是否正在运行，如果否就直接重新启动APP。

1.定义一个监控服务

package com.anloq.nfcservice;

import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.IBinder;
import android.util.Log;

import com.anloq.MyApplication;
import com.anloq.activity.AdActivity;
import com.anloq.utils.DetectionASUtils;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import java.util.Timer;
import java.util.TimerTask;

/**
 * Created by xpf on 2017/6/3 :)
 * 检测APP页面是否一直运行,不运行就直接启动
 */

public class MonitoringService extends Service {

 private final static String TAG = "MonitoringService";

 private BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
  @Override
  public void onReceive(Context context, Intent intent) {
   if ("kill_self".equals(intent.getAction())) {
    Log.e(TAG, "onReceive:杀死自己的进程！");
    killMyselfPid(); // 杀死自己的进程
   }
  }
 };

 private Timer timer = new Timer();
 private TimerTask task = new TimerTask() {
  @Override
  public void run() {
   checkIsAlive();
  }
 };

 /**
  * 检测应用是否活着
  */
 private void checkIsAlive() {
  String format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss",
    Locale.CHINA).format(new Date());
  Log.e(TAG, "CustodyService Run: " + format);

  boolean AIsRunning = CheckUtil.isClsRunning(
    MonitoringService.this, "com.xpf.monitor", "com.xpf.monitor.activity.AActivity");
  boolean BIsRunning = CheckUtil.isClsRunning(
    MonitoringService.this, "com.xpf.monitor", "com.xpf.monitor.activity.BActivity");
  boolean b = (AIsRunning || BIsRunning);
  boolean CIsRunning = CheckUtil.isClsRunning(
    MonitoringService.this, "com.xpf.monitor", "com.xpf.monitor.activity.CActivity");

  Log.e(TAG, "AIsRunning || BIsRunning is running:" + b + ",CIsRunning:" + CIsRunning);

  if (!CIsRunning) {
   if (!b) { //如果界面挂掉直接启动AActivity
    Intent intent = new Intent();
    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    intent.setClass(MonitoringService.this, AActivity.class);
    startActivity(intent);
   }
  }
 }

 @Override
 public void onCreate() {
  super.onCreate();
  Log.e(TAG, "onCreate: 启动监控服务! ");
  IntentFilter intentFilter = new IntentFilter();
  intentFilter.addAction("kill_self");
  registerReceiver(broadcastReceiver, intentFilter);
  timer.schedule(task, 0, 10000);// 设置检测的时间周期(毫秒数)
 }

 @Override
 public int onStartCommand(Intent intent, int flags, int startId) {
  return START_STICKY;
 }

 @Override
 public IBinder onBind(Intent arg0) {
  return null;
 }

 /**
  * 杀死自身的进程
  */
 private void killMyselfPid() {
  int pid = android.os.Process.myPid();
  String command = "kill -9 " + pid;
  Log.e(TAG, "killMyselfPid: " + command);
  stopService(new Intent(MonitoringService.this, MonitoringService.class));
  try {
   Runtime.getRuntime().exec(command);
   System.exit(0);
  } catch (Exception e) {
   e.printStackTrace();
  }
 }

 @Override
 public void onDestroy() {
  super.onDestroy();
  unregisterReceiver(broadcastReceiver);
  if (task != null) {
   task.cancel();
  }
  if (timer != null) {
   timer.cancel();
  }
 }
}

2.注册双进程Service

  <service
   android:name="com.xpf.monitor.MonitoringService"
   android:enabled="true"
   android:label="MonitoringService"
   android:process=":gray">
   <intent-filter>
    <action android:name="android.intent.action.RESPOND_VIA_MESSAGE" />
   </intent-filter>
  </service>

3.检测是否活着的工具类CheckUtil

public class CheckUtil {
 //检测service是否在运行
 public static boolean isServiceWorked(Context context, String serviceName) {
  ActivityManager myManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
  ArrayList<ActivityManager.RunningServiceInfo> runningService = (ArrayList<ActivityManager.RunningServiceInfo>) myManager.getRunningServices(Integer.MAX_VALUE);
  for (int i = 0; i < runningService.size(); i++) {
   if (runningService.get(i).service.getClassName().toString().equals(serviceName)) {
    return true;
   }
  }
  return false;
 }

 //检测activity是否存在再栈顶
 public static boolean isForeground(Context context, String PackageName) {
  ActivityManager myManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
  List<ActivityManager.RunningTaskInfo> task = myManager.getRunningTasks(1);
  ComponentName componentInfo = task.get(0).topActivity;
  if (componentInfo.getPackageName().equals(PackageName))
   return true;
  return false;
 }

 /**
  * 判断某个app进程是否在运行
  *
  * @param context
  * @param appInfo
  * @return
  */
 public static boolean isRunningProcess(Context context, String appInfo) {
  ActivityManager myManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
  List<ActivityManager.RunningAppProcessInfo> runningAppPs = myManager.getRunningAppProcesses();
  if (runningAppPs != null && runningAppPs.size() > 0) {
   if (runningAppPs.contains(appInfo)) {
    return true;
   }
  }
  return false;
 }

 /**
  * 判断一个Activity是否正在运行
  *
  * @param pkg  pkg为应用包名
  * @param cls  cls为类名eg
  * @param context
  * @return
  */
 public static boolean isClsRunning(Context context, String pkg, String cls) {
  ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
  List<ActivityManager.RunningTaskInfo> tasks = am.getRunningTasks(1);
  ActivityManager.RunningTaskInfo task = tasks.get(0);
  if (task != null) {
   return TextUtils.equals(task.topActivity.getPackageName(), pkg) &&
     TextUtils.equals(task.topActivity.getClassName(), cls);
  }
  return false;
 }
}

4.MainActivity中启动监控服务

 Intent intent = new Intent(MainActivity.this, MonitoringService.class);
 intent.setAction("android.intent.action.RESPOND_VIA_MESSAGE");
 startService(intent);

5.停止监控服务

发送一个杀死进程广播即可，action值如下

 Intent intent = new Intent();
 intent.setAction("kill_self");
 sendOrderedBroadcast(intent, null);

好了，今天就分享到这里了。。。

以上这篇Android检测Activity或者Service是否运行的方法就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持我们。

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