多任務下載框架Demo的運用

下載任務和任務調度部分代碼以前已經發過了，這裏只發UI相關部分代碼：html /** * <The trouble with the world is that the stupid are sure and the intelligent are full of doubt.> * <p> * HappyBaby * <p> * 做者：Jacky.Ao on 2018/2/26 15:

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