Question

我想让这项服务成为永无止境的服务，即使应用被用户杀死也是如此。该服务从应用程序开始 - 当它是后台时，服务仍在运行 - 但是当我清除手机上的后台任务时，它也会被杀死。我希望最后一部分不同，希望这项服务继续在设备上运行......这可能吗？谢谢你的帮助

public class BackgroundService extends Service {

public static Runnable runnable = null;
public Context context = this;
public Handler handler = null;


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

@Override
public void onCreate() {
    final PackageManager manager = getPackageManager();



    //Packages instalados no dispositivo
    List<ApplicationInfo> packages = manager.getInstalledApplications(PackageManager.GET_META_DATA);
    for (ApplicationInfo info : packages) {
        Log.i("Info", "Installed package:" + info.packageName);
    }

    for (int i = 0; i < packages.size(); i++) {
        if(packages.get(i).sourceDir.startsWith("/data/app/")){
            //Non System Apps
            Log.i("Info", "Installed package /NON SYSTEM/:" + packages.get(i).packageName);

        }else{
            //system Apps
            Log.i("Info", "Installed package !/SYSTEM/!:" + packages.get(i).packageName);

        }}




    handler = new Handler();
    runnable = new Runnable() {
        public void run() {
            final ActivityManager am = (ActivityManager) getBaseContext().getSystemService(ACTIVITY_SERVICE);

            String currentApp ="";

           // The first in the list of RunningTasks is always the foreground task.
            if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP) {
                UsageStatsManager usm = (UsageStatsManager) getSystemService(USAGE_STATS_SERVICE);
                long time = System.currentTimeMillis();
                List<UsageStats> appList = usm.queryUsageStats(UsageStatsManager.INTERVAL_DAILY,
                        time - 1000 * 1000, time);
                if (appList != null && appList.size() > 0) {
                    SortedMap<Long, UsageStats> mySortedMap = new TreeMap<Long, UsageStats>();
                    for (UsageStats usageStats : appList) {
                        mySortedMap.put(usageStats.getLastTimeUsed(),
                                usageStats);
                    }
                    if (mySortedMap != null && !mySortedMap.isEmpty()) {
                        currentApp = mySortedMap.get(
                                mySortedMap.lastKey()).getPackageName();
                    }
                }
            } else {
                ActivityManager.RunningTaskInfo foregroundTaskInfo = am.getRunningTasks(1).get(0);
                currentApp = foregroundTaskInfo.topActivity.getPackageName();
            }

            boolean ApiLigaIsRunning = false;

            if (currentApp.contains("maps")) {
                ApiLigaIsRunning = true;
                Log.i("CHOOSEN APP IS RUNNING ","YES!!!!!!!!!!!            " + currentApp);
                Handler handler2 = new Handler();
                final String finalCurrentApp = currentApp;
                handler2.postDelayed(new Runnable() {
                    public void run() {
                        Intent openMe = new Intent(getApplicationContext(), LoginActivity.class);
                        openMe.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
                        startActivity(openMe);
                        am.killBackgroundProcesses(finalCurrentApp);
                    }
                }, 200);

            }

            Toast.makeText(context, "Service is running", Toast.LENGTH_LONG).show();
            List<ActivityManager.RunningAppProcessInfo> appProcesses = am.getRunningAppProcesses();
            for(ActivityManager.RunningAppProcessInfo appProcess : appProcesses){
                if(appProcess.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND){
                    if (ApiLigaIsRunning == true)
                        Log.i("Foreground App ", appProcess.processName);
                    else
                        Log.i("Not Working! ", appProcess.processName);
                }

            handler.postDelayed(runnable,200);


            }
        }
    };

    handler.postDelayed(runnable, 200);
}







@Override
public void onDestroy() {
    Toast.makeText(this, "Service stopped", Toast.LENGTH_LONG).show();
}

}

这是我的清单文件：

       <?xml version="1.0" encoding="utf-8"?>
       <manifest xmlns:android="http://schemas.android.com/apk/res/android"
          xmlns:tools="http://schemas.android.com/tools"
           package="***************">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.KILL_BACKGROUND_PROCESSES" />
<uses-permission android:name="android.permission.REAL_GET_TASKS" />
<uses-permission android:name="android.permission.GET_TASKS"/>
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-permission android:name="android.permission.GET_TOP_ACTIVITY_INFO"/>
<uses-permission android:name="android.permission.INSTANT_APP_FOREGROUND_SERVICE"/>
<uses-permission android:name="android.permission.PACKAGE_USAGE_STATS" tools:ignore="ProtectedPermissions" />



<application
    android:allowBackup="true"
    android:icon="@mipmap/icon"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
<activity
    android:name=".LoginActivity"
    android:theme="@style/AppTheme.Dark">

    <intent-filter>
        <action android:name="android.intent.action.MAIN" />

        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
</activity>
    <service 
        android:name=".BackgroundService"
        android:exported="true"
        android:enabled="true"
        />

</application>

Answer 1

永远不会结束后台服务，但您可以限制关闭服务

因为这将消耗更多不允许的电池

1-使用Forground Service

这将使服务与Notification Like Music App一起运行

2- 使用START_STICKY

这将使您的服务在被杀死时开始

Answer 2

使用Broadcoast Receiver是可能的。但是自Oreo（API 26）起，您只能使用Job Scheduler执行该操作。

在大多数情况下，应用可以通过使用以下方法来解决这些限制 JobScheduler职位。这种方法可以让应用安排执行工作当应用未积极运行但仍为系统提供在不影响用户的情况下安排这些作业的时间经验。 Android 8.0对JobScheduler进行了多项改进这样可以更轻松地替换服务和广播接收器预定的工作。

更多信息，请访问：https://developer.android.com/about/versions/oreo/background

永远不会结束后台服务 - 适用于Android的Java

2 个答案: