Chcę pobrać plik z Internetu za pomocą usługi. Znalazłem kod źródłowy i kod działał dobrze. Ale mam problem, gdy wracam z aplikacji, której pobieranie się zatrzymuje lub gdy wyczyszczam pamięć RAM, również się zatrzymuje. Więc chcę znaleźć kod pobierania, taki jak Google Play, który nigdy nie przestanie działać, gdy wyczyścisz pamięć RAM lub historię aplikacji. To jest mój kod źródłowy:

public class Temp extends IntentService {
public static final int UPDATE_PROGRESS = 8344;
private int lastupdate=0;
private NotificationManager nm;
private Builder mBuilder;
public Temp() {

    super("Temp");


}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
    Log.d("SERVICE-ONCOMMAND", "onStartCommand");
    return START_STICKY;
 }

@Override
protected void onHandleIntent(Intent intent) {
    Log.e("ok","ok");
    nm = (NotificationManager)  getSystemService(NOTIFICATION_SERVICE);
    mBuilder = new NotificationCompat.Builder(this);
    mBuilder.setContentTitle(
            "Picture Download dnsadg sadgasjdgashgd asgd asjdg asjgd sajgd s")
            .setContentText("Download in progress")
            .setSmallIcon(R.drawable.icon_app).setContentInfo("0%");

    mBuilder.setOngoing(true);  
    File root = new File(Environment.getExternalStorageDirectory()
            + "/aaaa");
    String urlToDownload = "http://dl2.mid.az/endir.php?file=uploads/Exclusive/miri_yusif_-_yoxam_men_mp3.mid.az.mp3";
   // ResultReceiver receiver = (ResultReceiver) intent.getParcelableExtra("receiver");
    try {
        URL url = new URL(urlToDownload);
        URLConnection connection = url.openConnection();
        connection.connect();
        // this will be useful so that you can show a typical 0-100% progress bar
        int fileLength = connection.getContentLength();

        // download the file
        InputStream input = new BufferedInputStream(url.openStream());
        OutputStream output = new FileOutputStream(new File(root.getPath(),
                "ok.mp3"));

        byte data[] = new byte[1024];
        long total = 0;
        int count;
        while ((count = input.read(data)) != -1) {
            total += count;

            progressChange((int)(total * 100) / fileLength);
            // publishing the progress....
         //   Bundle resultData = new Bundle();
         //   resultData.putInt("progress" ,(int) (total * 100 / fileLength));
         //   receiver.send(UPDATE_PROGRESS, resultData);
            output.write(data, 0, count);
        }

        output.flush();
        output.close();
        input.close();
    } catch (IOException e) {
        e.printStackTrace();
    }

   // Bundle resultData = new Bundle();
  //  resultData.putInt("progress" ,100);
  //  receiver.send(UPDATE_PROGRESS, resultData);
}

@Override
public void onDestroy() {
    Log.e("DESTROY", "DESTROY");
    super.onDestroy();
}
void progressChange(int progress){


    if (lastupdate != progress) {
        lastupdate = progress;
        // not.contentView.setProgressBar(R.id.status_progress,
        // 100,Integer.valueOf(progress[0]), false);
        // inform the progress bar of updates in progress
        // nm.notify(42, not);
        if (progress < 100) {
            mBuilder.setProgress(100, Integer.valueOf(progress),
                    false).setContentInfo(progress+"%");
            nm.notify(12, mBuilder.build());
               Intent i = new Intent("com.russian.apps.TabActivity").putExtra("some_msg",progress+"%");
                this.sendBroadcast(i);
        } else {
            mBuilder.setContentText("Download complete")
            // Removes the progress bar
                    .setProgress(0, 0, false).setOngoing(false).setContentInfo("");;

            nm.notify(12, mBuilder.build());

        }

    }

}
}