Xamarin Android: Create Android App One Activity To Another Activity Passing Value

Let’s start,

Step 1 - Open Visual Studio, New Project, Templates, Visual C#, Android, Blank App, then select Blank App. Give Project Name and Project Location.



Step 2

Next we need to create Second page, so go to Solution Explorer, Project Name, Resources, layout. After that right click on Add->New Item, then open new Dialog box.



Step 3 - Select Android Layout and give name Secondpage.axml.



Step 4

And then we need to add one more Activity, so again go to Solution Explorer, then Project Name. After that right click to Add->New Item, then open new Dialog box.

Step 5 - Then select Activity and give name it SecondActivity.cs.



Step 6 - Next go for Solution Explorer-> Project Name->Resources->layout->Main.axml click to open Design View.

Step 7 - Select Toolbar Drag and Drop  Button, TextView and PlainText.

 



XML Code

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="fill_parent">

<TextView

android:text="FIRST PAGE"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:id="@+id/textView1" />

<EditText

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:id="@+id/txtpassvalue" />

<Button

android:text="Send"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:id="@+id/btnsend" />

</LinearLayout>

Step 8 - Next open Solution Explorer-> Project Name->Resources->layout->Secondpage.axml click to open Design View.

Step 9 - Select Toolbar Drag and Drop, Button  and TextView.





XML Code

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:orientation="vertical"

android:layout_width="match_parent"

android:layout_height="match_parent">

<Button

android:text="GET VALUE"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:id="@+id/btngetvalue" />

<TextView

android:textAppearance="?android:attr/textAppearanceLarge"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:id="@+id/txtgetvalue" />

</LinearLayout>

Step 10 - Next open Solution Explorer-> Project Name->MainActivity.cs click to open Code Window, then give following code,



C# Code 

using System;
using Android.App;
using Android.Content;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;
namespace DataValuePass
{
    [Activity(Label = "DataValuePass", MainLauncher = true, Icon = "@drawable/icon")]
    public class MainActivity: Activity
    {
        EditText txtdatapass;
        Button btnsend;
        protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);
            // Set our view from the "main" layout resource
            SetContentView(Resource.Layout.Main);
            // Get our button from the layout resource,
            // and attach an event to it
            btnsend = FindViewById < Button > (Resource.Id.btnsend);
            txtdatapass = FindViewById < EditText > (Resource.Id.txtpassvalue);
            btnsend.Click += Button_Click;
        }
        private void Button_Click(object sender, EventArgs e)
        {
            var intent = new Intent(this, typeof(SecondActivity));
            intent.PutExtra("DATA_PASS", txtdatapass.Text); //DATA_PASS is Identify the Value Pass variable
            this.StartActivity(intent);
        }
    }
}

Step 11 - Next to open Solution Explorer-> Project Name->SecondActivity.cs click to open Code Window, then give following code,



C# Code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Views;
using Android.Widget;
namespace DataValuePass
{
    [Activity(Label = "SecondActivity")]
    public class SecondActivity: Activity
    {
        Button btngetvalue;
        TextView txtgevalue;
        string txtvalues;
        protected override void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);
            // Create your application here
            SetContentView(Resource.Layout.Secondpage);
            txtvalues = Intent.GetStringExtra("DATA_PASS"); //Get The Value
            btngetvalue = FindViewById < Button > (Resource.Id.btngetvalue);
            txtgevalue = FindViewById < TextView > (Resource.Id.txtgetvalue);
            btngetvalue.Click += Btngetvalue_Click;;
        }
        private void Btngetvalue_Click(object sender, EventArgs e)
        {
            txtgevalue.Text = txtvalues;
        }
    }
}

Step 12 - Press F5 or Build and Run the Application,

• First Screen Give the Text Box Value “Hi Welcome" then Click Send Button.Next Move Second Screen.
• Second Screen to Press Get Button to Retrieve the passing value of “Hi Welcome” to display TextView.
  
   

Finally, we have successfully created a Xamarin Android one activity to another activity passing value app.