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MihaiCristianCondreaMihaiCristianCondrea
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Merge pull request #41 from D4rK7355608/codex/add-interactive-quiz-module
Add basic quiz module
2 parents a07b30a + 3ed1d99 commit f85c377

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‎app/src/main/AndroidManifest.xml

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android:exported="false"
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android:label="@string/navigation_drawer"
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android:parentActivityName=".ui.screens.android.lessons.navigation.drawer.NavigationDrawerActivity" />
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<activity
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android:name=".ui.screens.quiz.QuizActivity"
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android:exported="false"
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android:label="@string/quiz_title"
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android:parentActivityName=".ui.screens.quiz.QuizActivity" />
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<receiver
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android:name=".notifications.receivers.QuizReminderReceiver"
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android:exported="false" />
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<service
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android:name="androidx.appcompat.app.AppLocalesMetadataHolderService"

‎app/src/main/assets/quiz_questions.json

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[
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{
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"question": "What language is primarily used for Android app development?",
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"options": ["Python", "Java", "Swift", "Ruby"],
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"answer": 1
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},
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{
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"question": "Which file declares your app's activities?",
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"options": ["build.gradle", "AndroidManifest.xml", "strings.xml", "MainActivity.java"],
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"answer": 1
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},
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{
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"question": "Where do you store string resources?",
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"options": ["AndroidManifest.xml", "build.gradle", "strings.xml", "colors.xml"],
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"answer": 2
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},
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{
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"question": "Which layout allows positioning views relative to others?",
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"options": ["LinearLayout", "ConstraintLayout", "FrameLayout", "TableLayout"],
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"answer": 1
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},
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{
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"question": "What component shows a scrollable list of items?",
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"options": ["RecyclerView", "TextView", "ImageView", "Button"],
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"answer": 0
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}
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]

‎app/src/main/java/com/d4rk/androidtutorials/java/data/model/QuizQuestion.java

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package com.d4rk.androidtutorials.java.data.model;
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/**
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* Model representing a multiple-choice quiz question.
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*/
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public record QuizQuestion(
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String question,
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String[] options,
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int answerIndex
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) {}

‎app/src/main/java/com/d4rk/androidtutorials/java/notifications/managers/QuizReminderManager.java

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package com.d4rk.androidtutorials.java.notifications.managers;
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import android.app.AlarmManager;
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import android.app.PendingIntent;
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import android.content.Context;
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import android.content.Intent;
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import com.d4rk.androidtutorials.java.notifications.receivers.QuizReminderReceiver;
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import java.util.concurrent.TimeUnit;
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/**
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* Utility for scheduling daily quiz reminder notifications.
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*/
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public class QuizReminderManager {
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private final AlarmManager alarmManager;
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private final PendingIntent reminderIntent;
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public QuizReminderManager(Context context) {
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alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
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reminderIntent = PendingIntent.getBroadcast(
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context,
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1,
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new Intent(context, QuizReminderReceiver.class),
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PendingIntent.FLAG_IMMUTABLE
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);
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}
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/** Schedule a repeating daily reminder. */
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public void scheduleDailyReminder() {
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long trigger = System.currentTimeMillis() + TimeUnit.DAYS.toMillis(1);
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alarmManager.setRepeating(
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AlarmManager.RTC_WAKEUP,
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trigger,
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TimeUnit.DAYS.toMillis(1),
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reminderIntent
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);
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}
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}

‎app/src/main/java/com/d4rk/androidtutorials/java/notifications/receivers/QuizReminderReceiver.java

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package com.d4rk.androidtutorials.java.notifications.receivers;
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import android.content.BroadcastReceiver;
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import android.content.Context;
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import android.content.Intent;
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import androidx.work.OneTimeWorkRequest;
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import androidx.work.WorkManager;
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import com.d4rk.androidtutorials.java.notifications.workers.QuizReminderWorker;
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/**
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* BroadcastReceiver that enqueues a {@link QuizReminderWorker}.
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*/
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public class QuizReminderReceiver extends BroadcastReceiver {
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@Override
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public void onReceive(Context context, Intent intent) {
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OneTimeWorkRequest request = new OneTimeWorkRequest.Builder(
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QuizReminderWorker.class)
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.build();
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WorkManager.getInstance(context).enqueue(request);
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}
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}

‎app/src/main/java/com/d4rk/androidtutorials/java/notifications/workers/QuizReminderWorker.java

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package com.d4rk.androidtutorials.java.notifications.workers;
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import android.app.NotificationChannel;
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import android.app.NotificationManager;
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import android.app.PendingIntent;
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import android.content.Context;
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import android.content.Intent;
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import android.os.Build;
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import androidx.annotation.NonNull;
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import androidx.annotation.RequiresApi;
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import androidx.core.app.NotificationCompat;
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import androidx.work.Worker;
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import androidx.work.WorkerParameters;
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import com.d4rk.androidtutorials.java.R;
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import com.d4rk.androidtutorials.java.ui.screens.quiz.QuizActivity;
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/**
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* Worker that displays the daily quiz reminder notification.
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*/
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public class QuizReminderWorker extends Worker {
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public QuizReminderWorker(@NonNull Context context, @NonNull WorkerParameters params) {
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super(context, params);
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}
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@RequiresApi(api = Build.VERSION_CODES.O)
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@NonNull
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@Override
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public Result doWork() {
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NotificationManager manager = (NotificationManager) getApplicationContext()
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.getSystemService(Context.NOTIFICATION_SERVICE);
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String channelId = "quiz_reminder_channel";
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NotificationChannel channel = new NotificationChannel(
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channelId,
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getApplicationContext().getString(R.string.quiz_reminder_title),
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NotificationManager.IMPORTANCE_HIGH
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);
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manager.createNotificationChannel(channel);
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Intent intent = new Intent(getApplicationContext(), QuizActivity.class);
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PendingIntent pendingIntent = PendingIntent.getActivity(
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getApplicationContext(), 0, intent, PendingIntent.FLAG_IMMUTABLE);
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NotificationCompat.Builder builder = new NotificationCompat.Builder(getApplicationContext(), channelId)
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.setSmallIcon(R.drawable.ic_check_circle)
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.setContentTitle(getApplicationContext().getString(R.string.quiz_reminder_title))
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.setContentText(getApplicationContext().getString(R.string.quiz_reminder_body))
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.setAutoCancel(true)
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.setContentIntent(pendingIntent);
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manager.notify(1001, builder.build());
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return Result.success();
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}
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}

‎app/src/main/java/com/d4rk/androidtutorials/java/ui/screens/main/MainActivity.java

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import com.d4rk.androidtutorials.java.databinding.ActivityMainBinding;
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import com.d4rk.androidtutorials.java.notifications.managers.AppUpdateNotificationsManager;
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import com.d4rk.androidtutorials.java.notifications.managers.AppUsageNotificationsManager;
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import com.d4rk.androidtutorials.java.notifications.managers.QuizReminderManager;
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import com.d4rk.androidtutorials.java.ui.components.navigation.BottomSheetMenuFragment;
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import com.d4rk.androidtutorials.java.ui.screens.startup.StartupActivity;
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import com.d4rk.androidtutorials.java.ui.screens.startup.StartupViewModel;
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}
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AppUsageNotificationsManager appUsageNotificationsManager = new AppUsageNotificationsManager(this);
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appUsageNotificationsManager.scheduleAppUsageCheck();
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QuizReminderManager quizReminderManager = new QuizReminderManager(this);
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quizReminderManager.scheduleDailyReminder();
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appUpdateNotificationsManager.checkAndSendUpdateNotification();
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checkForImmediateUpdate();
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}

‎app/src/main/java/com/d4rk/androidtutorials/java/ui/screens/quiz/QuizActivity.java

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package com.d4rk.androidtutorials.java.ui.screens.quiz;
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import android.os.Bundle;
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import android.view.MenuItem;
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import androidx.annotation.NonNull;
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import androidx.appcompat.app.ActionBar;
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import androidx.appcompat.app.AppCompatActivity;
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import androidx.lifecycle.ViewModelProvider;
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import com.d4rk.androidtutorials.java.R;
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import com.d4rk.androidtutorials.java.data.model.QuizQuestion;
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import com.d4rk.androidtutorials.java.databinding.ActivityQuizBinding;
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import com.d4rk.androidtutorials.java.utils.EdgeToEdgeDelegate;
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import com.google.android.material.dialog.MaterialAlertDialogBuilder;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.widget.TextView;
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import com.airbnb.lottie.LottieAnimationView;
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/**
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* Activity that displays a simple multiple-choice quiz.
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*/
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public class QuizActivity extends AppCompatActivity {
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private ActivityQuizBinding binding;
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private QuizViewModel viewModel;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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binding = ActivityQuizBinding.inflate(getLayoutInflater());
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setContentView(binding.getRoot());
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EdgeToEdgeDelegate edgeToEdgeDelegate = new EdgeToEdgeDelegate(this);
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edgeToEdgeDelegate.applyEdgeToEdge(binding.container);
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ActionBar actionBar = getSupportActionBar();
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if (actionBar != null) {
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actionBar.setDisplayHomeAsUpEnabled(true);
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}
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viewModel = new ViewModelProvider(this).get(QuizViewModel.class);
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if (viewModel.getTotalQuestions() == 0) {
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new MaterialAlertDialogBuilder(this)
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.setMessage(R.string.quiz_no_more_questions)
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.setPositiveButton(android.R.string.ok, (d, w) -> finish())
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.setCancelable(false)
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.show();
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return;
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}
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showQuestion(viewModel.getCurrentQuestion());
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binding.buttonNext.setOnClickListener(v -> onNextClicked());
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}
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private void onNextClicked() {
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int selectedId = binding.optionsGroup.getCheckedRadioButtonId();
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int selectedIndex = -1;
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if (selectedId == binding.option1.getId()) {
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selectedIndex = 0;
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} else if (selectedId == binding.option2.getId()) {
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selectedIndex = 1;
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} else if (selectedId == binding.option3.getId()) {
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selectedIndex = 2;
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} else if (selectedId == binding.option4.getId()) {
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selectedIndex = 3;
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}
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if (selectedIndex != -1) {
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viewModel.answer(selectedIndex);
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}
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if (viewModel.getCurrentIndex().getValue() >= viewModel.getTotalQuestions()) {
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showResult();
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} else {
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showQuestion(viewModel.getCurrentQuestion());
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binding.optionsGroup.clearCheck();
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}
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}
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private void showQuestion(QuizQuestion question) {
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if (question == null) {
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return;
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}
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binding.textQuestion.setText(question.question());
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binding.option1.setText(question.options()[0]);
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binding.option2.setText(question.options()[1]);
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binding.option3.setText(question.options()[2]);
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binding.option4.setText(question.options()[3]);
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}
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private void showResult() {
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int score = viewModel.getScore().getValue();
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int total = viewModel.getTotalQuestions();
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View view = LayoutInflater.from(this).inflate(R.layout.dialog_quiz_result, null, false);
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TextView textResult = view.findViewById(R.id.text_result);
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textResult.setText(getString(R.string.quiz_finished, score, total));
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LottieAnimationView animationView = view.findViewById(R.id.animation_success);
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animationView.playAnimation();
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new MaterialAlertDialogBuilder(this)
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.setView(view)
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.setPositiveButton(android.R.string.ok, (d, w) -> finish())
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.setCancelable(false)
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.show();
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}
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@Override
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public boolean onOptionsItemSelected(@NonNull MenuItem item) {
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if (item.getItemId() == android.R.id.home) {
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finish();
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return true;
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}
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return super.onOptionsItemSelected(item);
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}
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}

‎app/src/main/java/com/d4rk/androidtutorials/java/ui/screens/quiz/QuizViewModel.java

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package com.d4rk.androidtutorials.java.ui.screens.quiz;
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import android.app.Application;
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import androidx.annotation.NonNull;
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import androidx.lifecycle.AndroidViewModel;
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import androidx.lifecycle.LiveData;
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import androidx.lifecycle.MutableLiveData;
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import com.d4rk.androidtutorials.java.data.model.QuizQuestion;
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import com.d4rk.androidtutorials.java.ui.screens.quiz.repository.QuizRepository;
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import java.util.List;
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/**
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* ViewModel managing quiz state and scoring.
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*/
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public class QuizViewModel extends AndroidViewModel {
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private final List<QuizQuestion> questions;
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private final MutableLiveData<Integer> currentIndex = new MutableLiveData<>(0);
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private final MutableLiveData<Integer> score = new MutableLiveData<>(0);
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public QuizViewModel(@NonNull Application application) {
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super(application);
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QuizRepository repository = new QuizRepository(application);
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questions = repository.loadQuestions();
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}
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public QuizQuestion getCurrentQuestion() {
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if (questions.isEmpty()) return null;
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int index = currentIndex.getValue();
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return questions.get(Math.min(index, questions.size() - 1));
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}
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public LiveData<Integer> getCurrentIndex() {
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return currentIndex;
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}
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public LiveData<Integer> getScore() {
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return score;
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}
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public void answer(int optionIndex) {
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QuizQuestion question = getCurrentQuestion();
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if (question != null && optionIndex == question.answerIndex()) {
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score.setValue(score.getValue() + 1);
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}
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currentIndex.setValue(currentIndex.getValue() + 1);
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}
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public int getTotalQuestions() {
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return questions.size();
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}
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}

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