(Publish the source code of small query tools made by class netizens, mainly including knowledge points (function points) 1. Use "layering", including color, style, animation, text, ID, and size (in fact, separating data and view) 2. HTTP solicitation, simple use of JSON 3. Use of expectation interface, ListView, and menu 4. Use of selector 5. Update and download (here, only the browser will be launched to open the APK location download when the solicitation interface finds a new version) 6 User defined navigation (hide the navigation bar provided by the system, and then hard code a layout, mainly based on the structure). I hope it will be helpful for beginners.
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