需求：假設我們的APP有3個頁面AActivity,BActivity,CActivity,我們的APP需要一直運行在前臺（特殊設備），要求實現一個監控服務，來監視APP是否運行，如果有3個頁面都不運行了就說明這個APP已經掛掉了，否則說明APP在運行狀態，不做處理，掛掉之后，我們需要重新啟動App來讓它繼續處理運行狀態，對外暴露一個來停止監控服務的廣播，這樣我們想停止監控服務時，發送一個廣播即可。
思路：實現一個雙進程的監控服務，服務中寫一個定時器 Timer 來重復進行檢測是否正在運行，如果否就直接重新啟動APP。
1.定義一個監控服務
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 :) * 檢測APP頁面是否一直運行,不運行就直接啟動 */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:殺死自己的進程！"); killMyselfPid(); // 殺死自己的進程 } } }; private Timer timer = new Timer(); private TimerTask task = new TimerTask() { @Override public void run() { checkIsAlive(); } }; /** * 檢測應用是否活著 */ 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) { //如果界面掛掉直接啟動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: 啟動監控服務! "); IntentFilter intentFilter = new IntentFilter(); intentFilter.addAction("kill_self"); registerReceiver(broadcastReceiver, intentFilter); timer.schedule(task, 0, 10000);// 設置檢測的時間周期(毫秒數) } @Override public int onStartCommand(Intent intent, int flags, int startId) { return START_STICKY; } @Override public IBinder onBind(Intent arg0) { return null; } /** * 殺死自身的進程 */ 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.注冊雙進程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.檢測是否活著的工具類CheckUtil
public class CheckUtil { //檢測service是否在運行 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; } //檢測activity是否存在再棧頂 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; } /** * 判斷某個app進程是否在運行 * * @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; } /** * 判斷一個Activity是否正在運行 * * @param pkg pkg為應用包名 * @param cls cls為類名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中啟動監控服務
Intent intent = new Intent(MainActivity.this, MonitoringService.class); intent.setAction("android.intent.action.RESPOND_VIA_MESSAGE"); startService(intent);5.停止監控服務
發送一個殺死進程廣播即可，action值如下
Intent intent = new Intent(); intent.setAction("kill_self"); sendOrderedBroadcast(intent, null);好了，今天就分享到這里了。。。
以上這篇Android檢測Activity或者Service是否運行的方法就是小編分享給大家的全部內容了，希望能給大家一個參考，也希望大家多多支持VEVB武林網。
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