| NetworkFetcher<FETCH_STATE extends FetchState> | Interface that specifies network fetcher used by the image pipeline. |
| NetworkFetcher.Callback | Callback used to inform the network fetch producer. |
| ProducerContext | Used to pass context information to producers. |
| ProducerContextCallbacks | Callbacks that are called when something changes in a request sequence. |
| ProducerListener | Instrumentation for Producers. |
| BaseNetworkFetcher<FETCH_STATE extends FetchState> | Base class for NetworkFetcher. |
| BaseProducerContextCallbacks | Empty implementation of ProducerContextCallbacks. |
| FetchState | Used by NetworkFetcher to encapsulate the state of one network fetch. |