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。