Construct an instance using the default encryption and decryption key.

Constructs a new retry policy using the default timeouts.

Constructs an instance of the DiskBasedCache at the specified directory. @param rootDirectory The root directory of the cache. @param maxCacheSizeInBy

Creates a new response delivery interface. @param handler {@link Handler} to post responses on

Constructs a Field Attributes object from the {@code f}. @param f the field to pull attributes from

Constructs a Gson object with default configuration. The default configuration has the following settings: <ul> <li>The JSON generated by <code>toJs

Creates a GsonBuilder instance that can be used to build Gson with various configuration settings. GsonBuilder follows the builder pattern, and it is

Constructs a BitmapContainer object. @param bitmap The final bitmap (if it exists). @param requestUrl The requested URL for this container. @param cac

Constructs a new ImageLoader. @param queue The RequestQueue to use for making image requests. @param imageCache The cache to use as an L1 cache.

Creates a new image request, decoding to a maximum specified width and height. If both width and height are zero, the image will be decoded to its nat

Creates an empty JsonArray.

Creates a new request. @param method the HTTP method to use @param url URL to fetch the JSON from @param requestBody A {@link String} to post with the

Creates a new JsonNull object. Deprecated since Gson version 1.8. Use {@link #INSTANCE} instead

Creates an empty JsonObject.

Creates a new request. @param method the HTTP method to use @param url URL to fetch the JSON from @param requestBody A {@link String} to post with the

Creates exception with the specified message. If you are wrapping another exception, consider using {@link #JsonParseException(String, Throwable)} ins

Create a primitive containing a boolean value. @param bool the value to create the primitive with.

Creates a new instance that reads a JSON-encoded stream from {@code in}.

Deprecated constructor for a JsonRequest which defaults to GET unless {@link #getPostBody()} or {@link #getPostParams()} is overridden (which defaults

@param json The string containing JSON elements concatenated to each other. @since 1.4

Creates a new instance that writes a JSON-encoded stream to {@code out}. For best performance, ensure {@link Writer} is buffered; wrapping in {@link j

Create the header entry

Creates a new network dispatcher thread. You must call {@link #start()} in order to begin processing. @param queue Queue of incoming requests for tr

Creates a new network response. @param statusCode the HTTP status code @param data Response body @param headers Headers returned with this response, o

统一失败回调

同步锁双重检测机制实现单例模式（懒加载）

Constructs a new PoolingByteArrayOutputStream with a default size. If more bytes are written to this instance, the underlying byte array will expand.

同步锁双重检测机制实现单例模式

Creates a new request with the given URL and error listener. Note that the normal response listener is not provided here as delivery of responses is

Creates the worker pool. Processing will not begin until {@link #start()} is called. @param cache A Cache to use for persisting responses to disk @pa

Initial the preferences manager. @param context The context of the application.

Creates a new request with the given method. @param method the request {@link Method} to use @param url URL to fetch the string at @param listener Li

Constructs a new type literal. Derives represented class from type parameter. <p>Clients create an empty anonymous subclass. Doing so embeds the type