service（）或下载管理器中的Asynctask从服务器下载文件

Question

I have a listView and and click of each row I have to download an mp3 file. I'm confused between AsyncTask within service() and build in DownloadManager (above API 9).

However because you handle each call to onStartCommand() yourself, you can perform multiple requests simultaneously. That's not what this example does, but if that's what you want, then you can create a new thread for each request and run them right away (instead of waiting for the previous request to finish).

From above line from docs I am thinking to create new instance of AsyncTask in the onStartCommand method, so each file will be downloaded as a separate task, but while searching I came across DownloadManagerr. I found very little information about it in the documentation.

I'm having doubts about DownloadManager. Does it is work like IntentService? Someone please guide me what to use (AsyncTask within service() or DownloadManager) and please clear up the above doubts.

Answer 1

Asynktask within service()

Implementing this code is much easier because you just create a service and start it by calling

startService(my_service);

But as begin service it can be stop by android when low on memory (your task will fail) It can be manually shutdown By user by going to setting and third It can be shut off if the phone is switched off you cannot resume your task after boot

DownloadManager

With DownloadManager you have to setup a BrodcastReceiver ACTION_NOTIFICATION_CLICKED but you get more control over your download as this API was solely developed for downloading purpose

Pros:

1. Download Can be restart after your cell has rebooted.
2. Can limit use over mobile networks (force wifi download only).