Retrofit 系列教程: https://futurestud.io/tutorials/retrofit-getting-started-and-android-client Gson 系列教程: https://futurestud.io/tutorials/gson-getting-started-with-java-json-serialization-deserialization Glide 系列教程: https://futurestud.io/tutorials/glide-getting-started Picasso 系列教程: https://futurestud.io/tutorials/picasso-getting-started-simple-loading