Android Service作为后台一直运行监测案例 _Android

千磨万击还坚劲，任尔东西南北风。这篇文章主要讲述Android Service作为后台一直运行监测案例相关的知识，希望能为你提供帮助。
1、定义 Service

package com.example.scangundemo_as; import android.app.ActivityManager; import android.app.Service; import android.content.ComponentName; import android.content.Context; import android.content.Intent; import android.content.pm.ApplicationInfo; import android.content.res.Resources; import android.os.IBinder; import android.support.annotation.Nullable; import android.text.TextUtils; import android.util.Log; import java.util.List; import java.util.logging.Logger; public class APPService extends Service {private static final String packageName = "com.example.scangundemo_as"; private static final String className = "MainActivity"; @Override public void onCreate() { super.onCreate(); Log.i("Service","-------create-------"); }@Override public void onDestroy() { super.onDestroy(); Log.i("Service","-------onDestroy-------"); }@Override public int onStartCommand(Intent intent, int flags, int startId) { Log.i("Service","-----service onStartCommand..."); new Thread(){ @Override public void run() { super.run(); while(true){ try { Thread.sleep(5000); } catch (InterruptedException e) { e.printStackTrace(); } //一直运行 boolean isRunningForeground = isRunningForeground(APPService.this); //Log.i("Service","-----service isRunningForeground="+isRunningForeground); if(!isRunningForeground){ Log.i("Service","-----start activity-----"); startActivityTool(APPService.this); } } } }.start(); return super.onStartCommand(intent, flags, startId); }@Nullable @Override public IBinder onBind(Intent intent) { return null; }
public static boolean isRunningForeground (Context context) { ActivityManager am = (ActivityManager)context.getSystemService(Context.ACTIVITY_SERVICE); ComponentName cn = am.getRunningTasks(1).get(0).topActivity; String currentPackageName = cn.getPackageName(); if(!TextUtils.isEmpty(currentPackageName) & & currentPackageName.equals(context.getPackageName())) { return true ; } return false ; }public static void startActivityTool(Context context){ Intent intent = new Intent(); intent.setClass(context, MainActivity.class); intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK ); context.startActivity(intent); }}

2、使用Service