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 client/server, WebSocket, and Socket.IO library for Android, AndroidAsync is it.
- Based on NIO. One thread, driven by callbacks. Highly efficient.
- All operations return a Future that can be cancelled
- Socket client + socket server
- HTTP client + server
- WebSocket client + server
- Socket.IO client
Download the latest JAR or grab via Maven:
<dependency>
<groupId>com.koushikdutta.async</groupId>
<artifactId>androidasync</artifactId>
<version>(insert latest version)</version>
</dependency>// url is the URL to download. The callback will be invoked on the UI thread
// once the download is complete.
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. The callback will be invoked on the UI thread
// once the download is complete.
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. The callback will be invoked on the UI thread
// once the download is complete.
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);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(ByteBufferList byteBufferList) {
System.out.println("I got some bytes!");
// note that this data has been read
byteBufferList.clear();
}
});
}
});SocketIOClient.connect(AsyncHttpClient.getDefaultInstance(), "http://192.168.1.2:3000", new ConnectCallback() {
@Override
public void onConnectCompleted(Exception ex, SocketIOClient client) {
if (ex != null) {
ex.printStackTrace();
return;
}
client.setStringCallback(new StringCallback() {
@Override
public void onString(String string) {
System.out.println(string);
}
});
client.setEventCallback(new EventCallback() {
@Override
public void onEvent(String event, JSONArray arguments) {
System.out.println("event: " + event + " args: " + arguments.toString());
}
});
client.setJSONCallback(new JSONCallback() {
@Override
public void onJSON(JSONObject json) {
System.out.println("json: " + json.toString());
}
});
}
});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().execute(post, new StringCallback() {
@Override
public void onCompleted(Exception e, AsyncHttpResponse source, String result) {
if (e != null) {
ex.printStackTrace();
return;
}
System.out.println("Server says: " + result);
}
});AsyncHttpServer server = new AsyncHttpServer();
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!!!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);
}
});