Android Development: JSON send and receive

Recently engaged in an Android app that uses JSON interactive technology to and from the server. Server side I was simply using a servlet to receive requests from the app, processing JSON using the Org.json jar package.

Server-side:

1. The object to be sent is processed into a jsonobject or Jsonarray object so that the ToString becomes a JSON statement.

Jsonarray Jsonarr = Reader.getnewsiteminjson (page);

2. Set the content type of the response header to: Text/json
Response.setcontenttype ("Text/json;charset=utf-8");

3. Convert object to byte array, write to output stream
Response.getoutputstream (). Write (Jsonarr.tostring (). GetBytes ());

The Android app side uses the normal HTTP protocol to get the data, the code is as follows.

　　

1  Public Staticstring readjsonstring (String urlstr) {2StringBuffer SB =NewStringBuffer ();3HttpURLConnection conn=NULL;4         Try{5URL url =NewURL (URLSTR);6conn =(HttpURLConnection) url.openconnection ();7Conn.setrequestmethod ("GET");8Conn.setconnecttimeout (5000);9Conn.setdoinput (true);Ten             if(Conn.getresponsecode () ==200){ OneInputStream is =Conn.getinputstream (); ABytearrayoutputstream OutputStream =NewBytearrayoutputstream (); -                 byte[] buffer =New byte[1024]; -                 intLen=0; the                  while(true){ -Len =is.read (buffer); -                     if(Len==-1){ -                          Break; +}Else { - outputstream.write (buffer); +                     } A                 } at                 byte[] result =Outputstream.tobytearray (); -String str =NewString (result, 0, result.length, "GBK")); - sb.append (str); - outputstream.close (); - is.close (); -             } in}Catch(Exception e) { - e.printstacktrace (); to}finally { +             if(conn!=NULL) { - Conn.disconnect (); the             } *         } $         returnsb.tostring ();Panax Notoginseng}

Android Development: JSON send and receive