Creating EditText and TextView

EditText and TextView are the subclass of  View Class.

EditText takes the  input from the user and TextView shows the output to the user.

actvity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center_horizontal"
    android:orientation="vertical">

    <TextView
        android:id="@+id/name_tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="20dp"
        android:textColor="@android:color/holo_orange_dark"
        android:textSize="18dp" />

    <EditText
        android:id="@+id/take_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="20dp"
        android:hint="Please enter your name" />

    <Button
        android:id="@+id/click_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"

        android:layout_marginTop="20dp"
        android:onClick="selfDestruct"
        android:text="@string/button" />

</LinearLayout>

MainActivity.java

package sravani.com.buttonexample;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    Button click_button;
    EditText take_name;
    TextView name_tv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        click_button = (Button) findViewById(R.id.click_button);
        take_name = (EditText) findViewById(R.id.take_name);
        name_tv = (TextView) findViewById(R.id.name_tv);

        click_button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                name_tv.setText("Welcom to " + take_name.getText().toString()+" Android Tutorial");

            }
        });
    }


}

output