CNS programs

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="20dp">

    <EditText
        android:id="@+id/etPhone"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Enter phone number"
        android:inputType="phone"/>

    <EditText
        android:id="@+id/etMessage"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Enter message"
        android:inputType="textMultiLine"/>

    <Button
        android:id="@+id/btnSend"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Send SMS"/>
</LinearLayout>

package com.example.smsb;

import android.os.Bundle;
import android.telephony.SmsManager;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

    EditText etPhone, etMessage;
    Button btnSend;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        etPhone = findViewById(R.id.etPhone);
        etMessage = findViewById(R.id.etMessage);
        btnSend = findViewById(R.id.btnSend);

        btnSend.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                String phone = etPhone.getText().toString();
                String message = etMessage.getText().toString();

                try {
                    SmsManager smsManager = SmsManager.getDefault();
                    smsManager.sendTextMessage(phone, null, message, null, null);

                    Toast.makeText(MainActivity.this,
                            "Message Sent",
                            Toast.LENGTH_SHORT).show();

                } catch (Exception e) {

                    Toast.makeText(MainActivity.this,
                            "Message Not Sent",
                            Toast.LENGTH_SHORT).show();

                }
            }
        });
    }
}

<uses-permission android:name="android.permission.SEND_SMS"/>