android - how to make a download manger like Adm -


i know question general please if can help,help me. know how work files ,how download them , make recyclerview , cardview . don't know when user puts lots of files in downloading line , exit activity ,how can app continues download them , show percentage of download in notification bar , when user comes activity show percentage of download cardview on recyclerview him. can 1 tell me should do?


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