AndroidAsync is a low level network protocol library. If you are looking for an easy to use, higher level, Android aware, http request library, check out Ion (it is built on top of AndroidAsync). The typical Android app developer would probably be more interested in Ion.
But if you're looking for a raw Socket, HTTP(s) client/server, and WebSocket library for Android, AndroidAsync is it.
- Based on NIO. Single threaded and callback driven.
- All operations return a Future that can be cancelled
- Socket client + socket server
- HTTP client + server
- WebSocket client + server
Download the latest JAR or grab via Maven:
<dependency>
<groupId>com.koushikdutta.async</groupId>
<artifactId>androidasync</artifactId>
<version>(insert latest version)</version>
</dependency>Gradle:
dependencies {
compile 'com.koushikdutta.async:androidasync:2.+'
}// url is the URL to download.
AsyncHttpClient.getDefaultInstance().getString(url, new AsyncHttpClient.StringCallback() {
// Callback is invoked with any exceptions/errors, and the result, if available.
@Override
public void onCompleted(Exception e, AsyncHttpResponse response, String result) {
if (e != null) {
e.printStackTrace();
return;
}
System.out.println("I got a string: " + result);
}
});// url is the URL to download.
AsyncHttpClient.getDefaultInstance().getJSONObject(url, new AsyncHttpClient.JSONObjectCallback() {
// Callback is invoked with any exceptions/errors, and the result, if available.
@Override
public void onCompleted(Exception e, AsyncHttpResponse response, JSONObject result) {
if (e != null) {
e.printStackTrace();
return;
}
System.out.println("I got a JSONObject: " + result);
}
});Or for JSONArrays...
// url is the URL to download.
AsyncHttpClient.getDefaultInstance().getJSONArray(url, new AsyncHttpClient.JSONArrayCallback() {
// Callback is invoked with any exceptions/errors, and the result, if available.
@Override
public void onCompleted(Exception e, AsyncHttpResponse response, JSONArray result) {
if (e != null) {
e.printStackTrace();
return;
}
System.out.println("I got a JSONArray: " + result);
}
});AsyncHttpClient.getDefaultInstance().getFile(url, filename, new AsyncHttpClient.FileCallback() {
@Override
public void onCompleted(Exception e, AsyncHttpResponse response, File result) {
if (e != null) {
e.printStackTrace();
return;
}
System.out.println("my file is available at: " + result.getAbsolutePath());
}
});// arguments are the http client, the directory to store cache files,
// and the size of the cache in bytes
ResponseCacheMiddleware.addCache(AsyncHttpClient.getDefaultInstance(),
getFileStreamPath("asynccache"),
1024 * 1024 * 10);AsyncHttpPost post = new AsyncHttpPost("http://myservercom/postform.html");
MultipartFormDataBody body = new MultipartFormDataBody();
body.addFilePart("my-file", new File("/path/to/file.txt");
body.addStringPart("foo", "bar");
post.setBody(body);
AsyncHttpClient.getDefaultInstance().executeString(post, new AsyncHttpClient.StringCallback(){
@Override
public void onCompleted(Exception ex, AsyncHttpResponse source, String result) {
if (ex != null) {
ex.printStackTrace();
return;
}
System.out.println("Server says: " + result);
}
});AsyncHttpClient.getDefaultInstance().websocket(get, "my-protocol", new WebSocketConnectCallback() {
@Override
public void onCompleted(Exception ex, WebSocket webSocket) {
if (ex != null) {
ex.printStackTrace();
return;
}
webSocket.send("a string");
webSocket.send(new byte[10]);
webSocket.setStringCallback(new StringCallback() {
public void onStringAvailable(String s) {
System.out.println("I got a string: " + s);
}
});
webSocket.setDataCallback(new DataCallback() {
public void onDataAvailable(DataEmitter emitter, ByteBufferList byteBufferList) {
System.out.println("I got some bytes!");
// note that this data has been read
byteBufferList.recycle();
}
});
}
});AsyncHttpServer server = new AsyncHttpServer();
List<WebSocket> _sockets = new ArrayList<WebSocket>();
server.get("/", new HttpServerRequestCallback() {
@Override
public void onRequest(AsyncHttpServerRequest request, AsyncHttpServerResponse response) {
response.send("Hello!!!");
}
});
// listen on port 5000
server.listen(5000);
// browsing http://localhost:5000 will return Hello!!!AsyncHttpServer httpServer = new AsyncHttpServer();
httpServer.listen(AsyncServer.getDefault(), port);
httpServer.websocket("/live", new AsyncHttpServer.WebSocketRequestCallback() {
@Override
public void onConnected(final WebSocket webSocket, AsyncHttpServerRequest request) {
_sockets.add(webSocket);
//Use this to clean up any references to your websocket
webSocket.setClosedCallback(new CompletedCallback() {
@Override
public void onCompleted(Exception ex) {
try {
if (ex != null)
Log.e("WebSocket", "An error occurred", ex);
} finally {
_sockets.remove(webSocket);
}
}
});
webSocket.setStringCallback(new StringCallback() {
@Override
public void onStringAvailable(String s) {
if ("Hello Server".equals(s))
webSocket.send("Welcome Client!");
}
});
}
});
//..Sometime later, broadcast!
for (WebSocket socket : _sockets)
socket.send("Fireball!");All the API calls return Futures.
Future<String> string = client.getString("http://foo.com/hello.txt");
// this will block, and may also throw if there was an error!
String value = string.get();Futures can also have callbacks...
Future<String> string = client.getString("http://foo.com/hello.txt");
string.setCallback(new FutureCallback<String>() {
@Override
public void onCompleted(Exception e, String result) {
System.out.println(result);
}
});For brevity...
client.getString("http://foo.com/hello.txt")
.setCallback(new FutureCallback<String>() {
@Override
public void onCompleted(Exception e, String result) {
System.out.println(result);
}
});