Create a radio button group with radio button of all courses in your college and on selecting a particular course, teacher-in-charge of that course should appear at the bottom of the screen.

/* Create a radio button group with radio button of all courses in your college and on selecting a particular course, teacher-in-charge of that course should appear at the bottom of the screen.*/

File Name: activity_main.xml

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

<RelativeLayout

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

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    android:paddingBottom="@dimen/activity_vertical_margin"

    tools:context=".MainActivity">

    <RadioGroup

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:id="@+id/rg1">

        <RadioButton

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="Night mode App"

            android:id="@+id/RB1"/>

        <RadioButton

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="Eye Filter App"

            android:id="@+id/RB2"

            android:layout_centerHorizontal="true" />

        <RadioButton

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="Night Screen Mode"

            android:layout_alignParentRight="true"

            android:id="@+id/RB3"/>

    </RadioGroup>

    <TextView

        android:text="@string/hello_world"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_marginTop="500dp"

        android:textSize="35dp"

        android:layout_centerHorizontal="true"

        android:id="@+id/T1"/>

</RelativeLayout>    

File Name: MainActivity.java

package com.ducskecode.radio_example;

import android.app.Activity;

import android.os.Bundle;

import android.view.Menu;

import android.view.MenuItem;

import android.widget.RadioButton;

import android.widget.RadioGroup;

import android.widget.TextView;

import android.widget.Toast;

public class MainActivity extends Activity {

    private RadioGroup rgrp;

    private RadioButton r1,r2,r3;

    private TextView t1;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);

   rgrp = (RadioGroup) findViewById(R.id.rg1);

   r1=(RadioButton)findViewById(R.id.RB1);

   r2=(RadioButton)findViewById(R.id.RB2);

   r3=(RadioButton)findViewById(R.id.RB3);

   t1= (TextView)findViewById(R.id.T1);

   rgrp.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {

    @Override

     public void onCheckedChanged(RadioGroup group, int checkedId) {

     RadioButton nameRadio = (RadioButton) findViewById(checkedId);

     String s1=nameRadio.getText().toString();

     if(checkedId==r1.getId())

                {

                    String s2="Parikshit android class";

                    t1.setText(s2);

                }

                else if(checkedId==r2.getId()) {

                String s3="Parikshit c++ class";

                    t1.setText(s3);

                }

                else{

                    String s4="Parikshit system programming class";

                    t1.setText(s4);

                }

            }

        });

    }

    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

        getMenuInflater().inflate(R.menu.menu_main, menu);

        return true;

    }

    @Override

    public boolean onOptionsItemSelected(MenuItem item) {

        int id = item.getItemId();

        if (id == R.id.action_settings) {

            return true;

        }

        return super.onOptionsItemSelected(item);

    }

}