How Android realizes reading and writing JSON data _android

The example in this article describes how Android realizes reading and writing JSON data. Share to everyone for your reference. Specifically as follows:

1. Parse JSON:

Package De.vogella.android.twitter.json;
Import Java.io.BufferedReader;
Import java.io.IOException;
Import Java.io.InputStream;
Import Java.io.InputStreamReader;
Import org.apache.http.HttpEntity;
Import Org.apache.http.HttpResponse;
Import Org.apache.http.StatusLine;
Import org.apache.http.client.ClientProtocolException;
Import org.apache.http.client.HttpClient;
Import Org.apache.http.client.methods.HttpGet;
Import org.apache.http.impl.client.DefaultHttpClient;
Import Org.json.JSONArray;
Import Org.json.JSONObject;
Import android.app.Activity;
Import Android.os.Bundle;
Import Android.util.Log; The public class Parsejson extends activity {/** called the ' when the ' is the ' The activity ' is a./@Override public void created
  Ate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);
  Setcontentview (R.layout.main);
  String readtwitterfeed = Readtwitterfeed ();
   try {jsonarray Jsonarray = new Jsonarray (readtwitterfeed); LOG.I (ParseJSON.class.getName (), "number of entries"+ jsonarray.length ());
    for (int i = 0; i < jsonarray.length (); i++) {Jsonobject jsonobject = Jsonarray.getjsonobject (i);
   LOG.I (ParseJSON.class.getName (), jsonobject.getstring ("text"));
  } catch (Exception e) {e.printstacktrace ();
  } public String Readtwitterfeed () {StringBuilder builder = new StringBuilder ();
  HttpClient client = new Defaulthttpclient ();
  HttpGet httpget = new HttpGet ("Http://twitter.com/statuses/user_timeline/vogella.json");
   try {httpresponse response = Client.execute (HttpGet);
   Statusline statusline = Response.getstatusline ();
   int statusCode = Statusline.getstatuscode ();
    if (StatusCode = =) {httpentity entity = response.getentity ();
    InputStream content = Entity.getcontent ();
    BufferedReader reader = new BufferedReader (new InputStreamReader (content));
    String Line;
    while (line = Reader.readline ())!= null) {builder.append (line); } else {LOG.E (ParseJSON.class.toStrING (), "Failed to download File");
  } catch (Clientprotocolexception e) {e.printstacktrace ();
  catch (IOException e) {e.printstacktrace ();
 return builder.tostring ();

 }
}

2. Generate JSON:

public void Writejson () {
 Jsonobject object = new Jsonobject ();
 try {
  object.put ("name", "Jack Hack");
  Object.put ("Score", new Integer);
  Object.put ("Current", New Double (152.32));
  Object.put ("nickname", "Hacker");
 } catch (Jsonexception e) {
  e.printstacktrace ();
 }
 System.out.println (object);

I hope this article will help you with your Android program.