APP #1

//ACTIVITY 1
sing Android.App;
using Android.Content;
using Android.OS;
using Android.Widget;
using Java.Net;
using System;
using System.IO;
using System.Json;
using System.Net;
using System.Security.Policy;
using System.Threading.Tasks;

namespace Prova
{
    [Activity(Label = "Prova", MainLauncher = true)]
    public class MainActivity : Activity
    {
        JsonValue MyResult;
        JsonValue[] Indice;

        protected override void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);

            // Set our view from the "main" layout resource
            SetContentView(Resource.Layout.PorcaMadonna);
            Button MyButton = FindViewById<Button>(Resource.Id.button1);
            EditText MyText = FindViewById<EditText>(Resource.Id.textView1);
            ListView MyList = FindViewById<ListView>(Resource.Id.listView1);

            MyButton.Click += async (sender, e) =>
            {
                string url = "https://maps.googleapis.com/maps/api/place/textsearch/json?query=restaurant+in+" + MyText.Text + "&key=METTERELAKEY";
                JsonValue json = await FetchMethodAsync(url);
                MyResult = json["results"];
                string[] items = new string[MyResult.Count];
                int i = 0;
                Indice = new JsonValue[MyResult.Count];
                foreach (JsonValue x in MyResult)
                {

                    items[i] = x["name"];
                    Indice[i] = x;
                    i++;
                }
                MyList.Adapter = new ArrayAdapter<string>(this, Android.Resource.Layout.SimpleListItem1, items);

                MyList.ItemClick += MyList_ItemClick;

            };


        }

        private void MyList_ItemClick(object sender, AdapterView.ItemClickEventArgs e)
        {
            Intent MyIntent = new Intent(this, typeof(activity2));
            MyIntent.PutExtra("Ciao", Indice[e.Position].ToString());
            StartActivity(MyIntent);
        }

        private async Task<JsonValue> FetchMethodAsync(string url)
        {
            string c = url;
            HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(new Uri(url));
            request.ContentType = "application/json";
            request.Method = "GET";

            using (WebResponse response = await request.GetResponseAsync())
            {
                using (Stream stream = response.GetResponseStream())
                {
                    JsonValue jsonDoc = await Task.Run(() => JsonObject.Load(stream));

                    return jsonDoc;
                }
            }
        }

    }
}
//ACTIVITY 2


using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Json;
using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Views;
using Android.Widget;

namespace Prova
{
    [Activity(Label = "activity2")]
    public class activity2 : Activity
    {
        protected override void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);
            SetContentView(Resource.Layout.layout1);
            TextView MyText1 = FindViewById<TextView>(Resource.Id.textView1);
            TextView MyText2 = FindViewById<TextView>(Resource.Id.textView2);
            JsonValue A = (JsonValue)Intent.GetStringExtra("Ciao");
            MyText1.Text = A["name"];
            MyText2.Text = A["formatted_address"];


            // Create your application here
        }
    }
}