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这篇文章主要介绍了Android如何检测Activity或者Service是否运行，具有一定借鉴价值，感兴趣的朋友可以参考下，希望大家阅读完这篇文章之后大有收获，下面让小编带着大家一起了解一下。
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);感谢你能够认真阅读完这篇文章，希望小编分享的“Android如何检测Activity或者Service是否运行”这篇文章对大家有帮助，同时也希望大家多多支持亿速云，关注亿速云行业资讯频道，更多相关知识等着你来学习!
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