android-async-http/android-async-http
Android Async Http
Android Async HTTP is a callback-based HTTP client library for Android, written in Java. It sends network requests on background threads and delivers results to callback handlers, so the user interface thread never blocks while waiting on a server. It is a thin convenience layer over Apache HttpClient and hides that client's verbose setup behind simpler request and response abstractions.
Requests of all common types (GET, POST, PUT, PATCH, DELETE and HEAD) can be built with a parameter builder and sent asynchronously, or run synchronously from existing background threads and services. Specialised response handlers turn replies into text, JSON objects, XML read through a SAX parser, or files. The library also persists cookies on the device so login state survives app restarts, and it supports basic and digest authentication. Each in-flight call is registered under a handle and optional tag, so individual requests, groups or all requests can be cancelled, for example when a screen closes.
Beyond the basics, it covers multipart file uploads using only built-in code, downloads that can resume from a saved position, redirect following, and byte-range requests. Network resilience features include automatic retries tuned for unreliable mobile connections, adjustable timeouts, and a thread pool that caps concurrent requests. Gzip compression and decompression are applied transparently through request interceptors. On the security side, it can trust custom certificate authorities and enable server name indication on older Android versions by plugging in an alternative security provider.
The project is built with Gradle, including a Windows batch launcher. It publishes signed artifacts with source and Javadoc jars to Maven repositories, and it is released under the Apache License 2.0.
