Parsing JSON data in Android

Problems with parsing JSON are often encountered in development

Here are some ways to summarize the parsing:

Way One:

JSON data:

Private String Jsondata = "[{\" name\ ": \" michael\ ", \" age\ ": 20},{\" name\ ": \" mike\ ", \" age\ ": 21}]";

Methods for parsing Jsondata

try {//If you need to parse JSON data, first generate a Jsonreader object Jsonreader reader=new jsonreader (new StringReader (Jsondata)); Reader.beginarray (), while (Reader.hasnext ()) {Reader.beginobject (), while (Reader.hasnext ()) {String tagname= Reader.nextname (), if (Tagname.equals ("name")) {System.out.println ("Name--->" +reader.nextstring ());} else if (tagname.equals ("Age")) {System.out.println (' Age---> ' +reader.nextint ()}} Reader.endobject ();} Reader.endarray ();} catch (IOException e) {//TODO auto-generated catch Blocke.printstacktrace ();}}

Method Two:

Private String jsondata= "{\" name\ ": \" michael\ ", \" age\ ": 20}";

Parsing methods

Gson gson=new Gson (); User User=gson.fromjson (Jsondata, User.class); System.out.println ("name-->" +user.getname ()); System.out.println ("age-->" +user.getage ());

You need to import Gson-2.2.4.jar here

public class User {private string name;private int age;public string getName () {return name;} public void SetName (String name) {this.name = name;} public int getage () {return age;} public void Setage (int.) {this.age = age;}}

This is the way to parse the more simple data

Method Three:

Private String Jsondata = "[{\" name\ ": \" michael\ ", \" age\ ": 20},{\" name\ ": \" mike\ ", \" age\ ": 21}]";

Type listtype=new typetoken<linkedlist<user>> () {}.gettype (); Gson gson=new Gson (); Linkedlist<user> Users=gson.fromjson (Jsondata, ListType); for (Iterator Iterator=users.iterator (); Iterator.hasnext ();) {User user= (user) iterator.next (); SYSTEM.OUT.PRINTLN ("Name--->" +user.getname ()); System.out.println ("Age--->" +user.getage ());}

In fact, in addition to these three ways there are other methods, and so later used to summarize.