Detailed explanation of Volley instance of Android network request framework

Detailed explanation of Volley instance of Android network request framework @ h_ 404_ 3@

First, the renderings @ h_ 404_ 3@

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Logcat log info on Reponse@H_ 404_ 3@

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Volley is especially suitable for scenarios with small amount of data but frequent communication, such as file upload and download@ H_ 404_ 3@

First step @ h_ 404_ 3@

Requetqueue used @ h_ 404_ 3@

RequestQueue.Java @H_ 404_ 3@

Requestqueue first of all, let's talk about how the reuqestqueue manages requests... Requestqueue saves all requests... Then use its own start () method to start a cachedispatcher thread for cache scheduling and several networkdispatcher threads for network scheduling... So why do you design this@ H_ 404_ 3@

Because if a request has been submitted once, we only need to process the result of this time. For repeated requests, we can use a cache to save... So as to reduce some unnecessary network requests and reduce the burden on the server... If a request does not exist in the cache, Then we can execute the network request again @ h_ 404_ 3@

In short, the design concept is to take out the request from the requestqueue. First judge whether the cache hits. If the cache hits, take out the data from the cache. If the cache does not hit, submit the network request and obtain the data @ h from the server_ 404_ 3@

Import volley.jar into your project LIBS, and then add to build path @ H_ 404_ 3@

Then create the netcacheactivity class @ H_ 404_ 3@

BitmapCache @H_ 404_ 3@

Layout file activity_ main.xml @H_ 404_ 3@

Thank you for reading, hope to help you, thank you for your support to this site@ H_ 404_ 3@