how to use android-sdk to create a app application?
The android sdk is using webview of blockstack browser websites to interact with Blockstack Dapp.
BTW, from your avatar it seems that you are from China, right? Welcome to Blockstack forum!
If you want information in Chinese and in time. You can join in Chinese community in Wechat. I am working on it and would like to answer questions from developers like you.
The Blockstack SDK has been moved to pure kotlin implementation, no webviews anymore!