Question

我有一个正在下载前台文件的服务

@Override
    public int onStartCommand(Intent intent, int flags, int sid){
        this.sid = sid;
        PendingIntent mainIntent = PendingIntent.getActivity(this, 0, MyApplication.mainIntent, 0);
        Notification notification = new NotificationCompat.Builder(VuclipPrime.getInstance())
                .setSmallIcon(R.drawable.ic_launcher)
                .setContentTitle("Downloading Video")
                .setContentText("Initiating...")
                .setContentIntent(mainIntent)
                .setAutoCancel(false)
                .setOngoing(true)
                .build();
        startForeground(mNotificationId, notification);
        if (VideoDownloadManager.currentVideoDownloadTask != null) {
            VideoDownloadManager.currentVideoDownloadTask.start();
        } else {
            stopSelf();
        }
        return START_NOT_STICKY;
    }

当我滑动以杀死该应用时，该服务也将被停止。我在StackOverflow上尝试了所有现有的解决方案，但没有一个正在运行。我尝试了YouTube应用，它并没有扼杀它的服务。我如何实现这一目标？感谢。

Answer 1

您使用NOT_STICKY参数启动服务。您应该在onStartCommand（）

中返回 START_STICKY

@Override
    public int onStartCommand(Intent intent, int flags, int sid){
        this.sid = sid;
        PendingIntent mainIntent = PendingIntent.getActivity(this, 0, VuclipPrime.mainIntent, 0);
        Notification notification = new NotificationCompat.Builder(VuclipPrime.getInstance())
                .setSmallIcon(R.drawable.ic_launcher)
                .setContentTitle("Downloading Video")
                .setContentText("Initiating...")
                .setContentIntent(mainIntent)
                .setAutoCancel(false)
                .setOngoing(true)
                .build();
        startForeground(mNotificationId, notification);
        if (VideoDownloadManager.currentVideoDownloadTask != null) {
            VideoDownloadManager.currentVideoDownloadTask.start();
        } else {
            stopSelf();
        }
        return START_STICKY;
    }

来自文档：

https://developer.android.com/reference/android/app/Service.html#START_STICKY

START_STICKY：系统将在尝试时再次启动服务它被杀了。
START_NO_STICKY：系统不关心是否服务被杀了。

Answer 2

解决方案是在服务的onTaskRemoved（）方法中启动虚拟活动，以防止服务被杀死。启动后立即完成DummyActivity。

检查以下代码： -

int
Z* [5]
void (*)(int, char)

DummyActivity： -

package com.your.application.services;

import android.app.Notification;
import android.app.PendingIntent;
import android.app.Service;
import android.content.Intent;
import android.os.Build;
import android.os.IBinder;
import android.support.v4.app.NotificationCompat;


public class DownloadService extends Service {
    int mNotificationId = 001;
    Notification notification;
    private int sid;

    public DownloadService() {
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int sid) {
        this.sid = sid;
        PendingIntent mainIntent = PendingIntent.getActivity(this, 0, YourApplication.getInstance().downloadService.mainIntent, 0);
        notification = new NotificationCompat.Builder(YourApplication.getInstance())
                .setSmallIcon(R.drawable.ic_launcher)
                .setContentTitle("Starting Service")
                .setContentText("Initiating...")
                .setContentIntent(mainIntent)
                .setAutoCancel(true)
                .setOngoing(true)
                .build();
        startForeground(mNotificationId, notification);
        if (YourApplication.getInstance().downloadService.videoDownloader != null) {
            YourApplication.getInstance().downloadService.startDonwloadThread(YourApplication.getInstance().downloadService.videoDownloader);
        } else {
            stopSelf();
        }
        return START_NOT_STICKY;
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
    }

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

    @Override
    public void onTaskRemoved(Intent rootIntent) {
        if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.LOLLIPOP_MR1 && Build.VERSION.SDK_INT > Build.VERSION_CODES.JELLY_BEAN_MR2) {
            Intent intent = new Intent(this, DummyActivity.class);
            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            startActivity(intent);
        }
    }
}

DummyActivity的AndroidManifest条目： -

public class DummyActivity extends Activity {
    @Override
    public void onCreate(Bundle bundle) {
        super.onCreate(bundle);
        finish();
    }
}

Answer 3

当进程处于睡眠模式时，如果它未被列为受保护的应用程序，则会停止进程。转到设置 - ＆gt;受保护的应用 - ＆gt;选择您的应用并启用为受保护的应用。

应用程序被杀后，Android 4.1~5.1.1中的前台服务立即被杀死

3 个答案: