android - DataInputStream.readUTF is not receiving any string from Node.js Server -

today writing app (android) received strings server in node.js. socket connection fine, can send android server fine, when comes receiving server, readutf() stuck @ reading. here's android code send , receive:

socket socket = new socket("10.13.37.129",1337);                             dataoutputstream dataoutputstream = new dataoutputstream(socket.getoutputstream());                             jsonobject jsonobject = new jsonobject();                             jsonobject.put("data", "tristen");                             dataoutputstream.writeutf(jsonobject.tostring());                             datainputstream datainputstream = new datainputstream(socket.getinputstream());                             system.out.println("receiving");                             final byte[] buffer = {};                             datainputstream.read(buffer);                             string = new string(buffer);                             system.out.println("received");                             runnable runnable1 = new runnable() {                                 @override                                 public void run() {                                     system.out.println("this string: " + string);                                     system.out.println("this buffer: " + buffer.length);                                     system.out.println("this buffer.tostring(): " + buffer.tostring());                                     textview.settext(string);                                 }                             };                             runonuithread(runnable1); 

and server code send string:

// add 'data' event handler instance of socket clientsocket.on('data', function(data) {     console.log('data: ' + data);     clientsocket.write('hello\n');     clientsocket.write('world\n'); }); 

can see what's wrong it?

readutf() reading strings written dataoutputstream.writeutf().. nothing else. use read(), bufferedreader.readline(), etc.