Management System for Online Examination

Management System for Online Examination

First, let's create the XML layout file activity_online_exam.xml for the activity:

 

XML Code

<!-- activity_online_exam.xml -->
<LinearLayout 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:orientation="vertical"
    android:padding="16dp"
    tools:context=".OnlineExamActivity">
 
    <TextView
        android:id="@+id/question_text_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceMedium" />
 
    <RadioGroup
        android:id="@+id/answers_radio_group"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">
 
        <RadioButton
            android:id="@+id/option1_radio_button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Option 1" />
 
        <RadioButton
            android:id="@+id/option2_radio_button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Option 2" />
 
        <RadioButton
            android:id="@+id/option3_radio_button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Option 3" />
 
        <RadioButton
            android:id="@+id/option4_radio_button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Option 4" />
 
    </RadioGroup>
 
    <Button
        android:id="@+id/submit_button"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Submit" />
 
</LinearLayout>
 

Next, let's create the Java code for the activity:

Java Code

import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.Toast;
 
public class OnlineExamActivity extends AppCompatActivity {
 
    private TextView questionTextView;
    private RadioGroup answersRadioGroup;
    private Button submitButton;
 
    private String[] questions;
    private String[] correctAnswers;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_online_exam);
 
        // Initialize views
        questionTextView = findViewById(R.id.question_text_view);
        answersRadioGroup = findViewById(R.id.answers_radio_group);
        submitButton = findViewById(R.id.submit_button);
 
        // Initialize exam data
        questions = getResources().getStringArray(R.array.questions);
        correctAnswers = getResources().getStringArray(R.array.correct_answers);
 
        // Display first question
        displayQuestion(0);
 
        // Set submit button click listener
        submitButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                int selectedRadioButtonId = answersRadioGroup.getCheckedRadioButtonId();
 
                if (selectedRadioButtonId != -1) {
                    RadioButton selectedRadioButton = findViewById(selectedRadioButtonId);
                    String selectedAnswer = selectedRadioButton.getText().toString();
 
                    checkAnswer(selectedAnswer);
                } else {
                    Toast.makeText(OnlineExamActivity.this, "Please select an answer", Toast.LENGTH_SHORT).show();
                }
            }
        });
    }
 
    private void displayQuestion(int questionIndex) {
        String question = questions[questionIndex];
        questionTextView.setText(question);
 
        RadioButton option1RadioButton = findViewById(R.id.option1_radio_button);
        RadioButton option2RadioButton = findViewById(R.id.option2_radio_button);
        RadioButton option3RadioButton = findViewById(R.id.option3_radio_button);
        RadioButton option4RadioButton = findViewById(R.id.option4_radio_button);
 
        option1RadioButton.setText("Option 1");
        option2RadioButton.setText("Option 2");
        option3RadioButton.setText("Option 3");
        option4RadioButton.setText("Option 4");
    }
 
    private void checkAnswer(String selectedAnswer) {
        int questionIndex = answersRadioGroup.indexOfChild(findViewById(answersRadioGroup.getCheckedRadioButtonId()));
        String correctAnswer = correctAnswers[questionIndex];
 
        if (selectedAnswer.equals(correctAnswer)) {
            Toast.makeText(this, "Correct Answer!", Toast.LENGTH_SHORT).show();
        } else {
            Toast.makeText(this, "Wrong Answer!", Toast.LENGTH_SHORT).show();
        }
    }
}
 

In this example, the OnlineExamActivity class extends AppCompatActivity.

Inside the onCreate method, the layout views are initialized, and the exam data is retrieved from the resources. The first question is displayed.

The submit button's click listener checks if an answer is selected and calls the checkAnswer method to validate the answer.

The displayQuestion method updates the question text view and radio buttons with the current question and options.

The checkAnswer method compares the selected answer with the correct answer for the current question and displays a toast message indicating whether the answer is correct or wrong.

Make sure to add the questions and correct_answers string array resources to the res/values/strings.xml file:

 

XML Code

<!-- strings.xml -->
<resources>
    ...
    <string-array name="questions">
        <item>Question 1</item>
        <item>Question 2</item>
        <item>Question 3</item>
        <item>Question 4</item>
    </string-array>
 
    <string-array name="correct_answers">
        <item>Option 2</item>
        <item>Option 3</item>
        <item>Option 1</item>
        <item>Option 4</item>
    </string-array>
    ...
</resources>
 

Remember to replace the questions array with the actual questions and correct_answers array with the correct answers for your online examination.

This example provides a basic structure for an online examination management system. You can customize it by adding more questions, options, and additional features such as scoring, timers, and result calculation.