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.