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okhttp also has direct asynchronous callbacks, and your feeling must be wrong - -
I can tell you clearly that Volley’s asynchronous also sends Runnable to implement callback by binding the main thread Looper’s handler.
It may be because of the server configuration that you triggered Volley’s HTTP 304 caching technology
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
okhttp also has direct asynchronous callbacks, and your feeling must be wrong - -
I can tell you clearly that Volley’s asynchronous also sends Runnable to implement callback by binding the main thread Looper’s handler.
It may be because of the server configuration that you triggered Volley’s HTTP 304 caching technology