Xamarin.android get and parse json for getting Started instance (1)

1.main.axml View Interface

2. View Code

1 <?XML version= "1.0" encoding= "Utf-8"?>2 <LinearLayoutxmlns:android= "Http://schemas.android.com/apk/res/android"3 android:orientation= "vertical"4 Android:layout_width= "Fill_parent"5 Android:layout_height= "Fill_parent"6 Android:minwidth= "25px"7 Android:minheight= "25px">8     <ListView9         Android:id= "@android: Id/list"Ten Android:layout_width= "Fill_parent" One Android:layout_height= "Wrap_content" /> A </LinearLayout>

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3.mainactivity.cs

1 usingSystem;2 usingSystem.Net;3 usingSystem.IO;4 usingSystem.json;5 usingSystem.Linq;6 usingSystem.Xml.Linq;7 8 usingAndroid.app;9 usingandroid.content;Ten usingAndroid.runtime; One usingandroid.views; A usingAndroid.widget; - usingAndroid.os; -  the namespacenetjsonlist - { -[Activity (Label ="netjsonlist", Mainlauncher =true, Icon ="@drawable/icon")] -      Public classmainactivity:listactivity +     { -         classTest:Java.Lang.Object +         { A              Public string[] Results {Get;Set; } at         } -  - Test t; -  -         protected Override voidOnCreate (Bundle bundle) -         { in             Base. OnCreate (bundle); - Setcontentview (Resource.Layout.Main); to Loadxamarin (); +         } -  the         //Override this method *          Public OverrideJava.Lang.Object onretainnonconfigurationinstance () $         {Panax Notoginseng             returnT; -         } the  +          Public voidLoadxamarin () A         { thet = lastnonconfigurationinstance asTest; +             ////Determine if there is a previous state -             if(t! =NULL) $             { $ListAdapter =Newarrayadapter<string> ( This, Resource.Id.listView1, t.results); -             } -             Else the             { - Wuyi                 //JSON request URL the                 stringURL ="http://192.168.1.2/Country/OaAreaByCountryId?countryId=21&pid=76"; -                 /* Wu {"Stats": 1, "result": [{"pid": "", "id": "," "Name": "Lishui", "py": "L", "items": [{"ISKC": True, "IDs": "," Peisongu RL ":", "id": +, "name": "Liandu District", "py": "L"},{"ISKC": True, "IDs": "", "Peisongurl": "", "id": +, "name": "Longquan", "py": "L"},{" ISKC ": True," IDs ":" "," Peisongurl ":" "," id ": +," name ":" Qingtian County "," py ":" Q "},{" ISKC ": True," IDs ":" "," Peisongurl ":" "," id " : Bayi, "name": "Jinyun County", "py": "J"},{"ISKC": True, "IDs": "", "Peisongurl": "", "id":, "name": "Suichang County", "py": "S"},{"ISKC": true, " IDs ":", "Peisongurl": "", "id": "Songyang County", "py": "S"},{"ISKC": True, "IDs": "", "Peisongurl": "", "id": "", "" Name ":" Yunhe County "," py ":" Y "},{" ISKC ": True," IDs ":" "," Peisongurl ":" "," id ":", "" Name ":" Qingyuan County "," py ":" Q "},{" ISKC ": True," IDs ":" "," Peisongurl ":", "id": 241, "name": "Jingning County", "py": "J"}]}]} -                  */ About                 //Create a request $                 varHttpreq = (HttpWebRequest) httpwebrequest.create (NewUri (URL)); -                 //Get Response -                 //var httpres = (HttpWebResponse) httpreq.getresponse (); -                 //Reading stream Text A                 //string text = new StreamReader (Httpres.getresponsestream ()). ReadToEnd (); +                 //deserializes text-based JSON from a stream into a JSON CLR type the                 //var text = (jsonobject) jsonobject.load (Httpres.getresponsestream ()); -                 //Test $                 //var result = new string[] {"1", "2", "3", "4"}; the                 //returns a collection containing the keys in the Jsonobject the                 //var result = text. Keys.tolist (); the                 //Adapter List View ListView control Id= "@android: Id/list" the                 //listadapter = new Arrayadapter<string> (this, Android.Resource.Layout.SimpleListItem1, result); -  inHttpreq.begingetresponse (NewAsyncCallback (Readxamarin), httpreq); the             } the         } About  the         //Asynchronous Callback methods the          Public voidReadxamarin (IAsyncResult Asyn) the         { +             varHttpreq =(HttpWebRequest) Asyn. asyncstate; -  the             //Get ResponseBayi             using(varHttpres =(HttpWebResponse) httpreq.endgetresponse (Asyn)) the             { the                 //determine if a response was successfully obtained -                 if(Httpres.statuscode = =Httpstatuscode.ok) -                 { the                     //Read Response the                     //var text = new StreamReader (Httpres.getresponsestream ()). ReadToEnd (); the                     varText =(Jsonobject) jsonobject.load (Httpres.getresponsestream ()); the                     //returns a collection containing the keys in the Jsonobject -                     varresult =text. Keys.tolist (); the                     //Adapter List View ListView control Id= "@android: Id/list" the                     //listadapter = new Arrayadapter<string> (this, Android.Resource.Layout.SimpleListItem1, result); the                     //switch to the UI thread, otherwise the control cannot be manipulated94Runonuithread (() = the                     { theListAdapter =Newarrayadapter<string> ( This, Android.Resource.Layout.SimpleListItem1, result); the                     });98                 } About             } -         }101     }102}

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SOURCE Download: Netjsonlist.zip

Xamarin.android get and parse json for getting Started instance (1)