java.lang.IllegalStateException: attempt to re-open an already-closed object: SQLiteDatabase: /data/user/0/packagename/databases/downloader_db about downloader HOT 7 CLOSED

Hi, this exception raised when creating multiple instances from downloader because you create a new thread for doing a transaction on the database, in downloader library using room library for store download state, so a room doesn't let create a new transaction when close that's already.
You shouldn't use downloader for loading image, so you can use a specific library for image loading like glide, picasso or etc.
An otherwise when using downloader instead of image loader probably you must be solved multi-threading issue

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@alirezat775 , thank you for so quick answer. I decided to use this lib, cuz I don't need to show image in ui, just download it to file storage + progress and beautiful api. So, am I right, if say, for fixing my issue, all I need is create a queue of downloading tasks and just load files one-by-one?

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@GrishinSergey your welcome, currently supported light-weight queue in the library, so that's mean you can execute download task with a limit resources also you can create a pool of downloader for downloading item with priority in the background and handle multiple downloader objects in the downloader-pool

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@alirezat775, can you show an example, how to use this queue? For now I see database and I understood fo myself that this is that queue about what you saying. Can you show some examples?

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In the library use android looper for handle multi-thread actions, they implemented in parent asyncTask class.
This sample maybe helpful for implementation thread-pool

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Okay, thank you, alirezat775. I think, this issue can be closed?

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I close the issue, good luck

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