MainActivity.java Package com.example.exp2;

import androidx.appcompat.app.AppCompatActivity; import android.content.Intent; import android.net.Uri; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.TextView; public class MainActivity extends AppCompatActivity {

TextView welcome;
Button phone, sms, website;
Intent i = new Intent();

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    phone = (Button)findViewById(R.id.b1);
    sms = (Button) findViewById(R.id.b2);
    website = (Button) findViewById(R.id.b3);
    phone.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            i.setAction(Intent.ACTION_DIAL);
            i.setData(Uri.parse("tel:9505061025"));
            startActivity(i);
        }
    });
    sms.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            i.setAction(Intent.ACTION_VIEW);
            i.setData(Uri.parse("sms:9505061025"));
            startActivity(i);
        }
    });
    website.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            i.setAction(Intent.ACTION_VIEW);
            i.setData(Uri.parse("https://www.cmrithyderabad.edu.in/"));
            startActivity(i);
        }
    });

}}

Activity_main.xml

<TextView
    android:id="@+id/tv1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Menu options"
    android:textAlignment="center"
    android:textColor="#572623"
    android:textSize="40sp"
    android:textStyle="italic” />

<Button
    android:id="@+id/b1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="Phone"
    android:textSize="25sp"
    android:textStyle="italic"
    android:textAllCaps="true” />
<Button
    android:id="@+id/b2"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="SMS"
    android:textSize="25sp"
    android:textStyle="italic"
    android:textAllCaps="true"/>
    
<Button
    android:id="@+id/b3"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
     android:text="Website"
    android:textSize="25sp"
    android:textStyle="italic"
    android:textAllCaps="true"/>