initial

.gitignore

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+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties

app/.gitignore

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+/build

app/build.gradle.kts

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+plugins {
+    id("com.android.application")
+}
+
+android {
+    namespace = "com.example.quizgame_50073457"
+    compileSdk = 34
+
+    defaultConfig {
+        applicationId = "com.example.quizgame_50073457"
+        minSdk = 29
+        targetSdk = 34
+        versionCode = 1
+        versionName = "1.0"
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules.pro")
+        }
+    }
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_1_8
+        targetCompatibility = JavaVersion.VERSION_1_8
+    }
+}
+
+dependencies {
+
+    implementation("androidx.appcompat:appcompat:1.6.1")
+    implementation("com.google.android.material:material:1.11.0")
+    implementation("androidx.constraintlayout:constraintlayout:2.1.4")
+    testImplementation("junit:junit:4.13.2")
+    androidTestImplementation("androidx.test.ext:junit:1.1.5")
+    androidTestImplementation("androidx.test.espresso:espresso-core:3.5.1")
+    implementation ("com.google.code.gson:gson:2.8.6")
+}

app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

app/src/androidTest/java/com/example/quizgame_50073457/ExampleInstrumentedTest.java

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+package com.example.quizgame_50073457;
+
+import android.content.Context;
+
+import androidx.test.platform.app.InstrumentationRegistry;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext() {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
+        assertEquals("com.example.quizgame_50073457", appContext.getPackageName());
+    }
+}

app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <application
+        android:allowBackup="true"
+        android:dataExtractionRules="@xml/data_extraction_rules"
+        android:fullBackupContent="@xml/backup_rules"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.Quizgame_50073457"
+        tools:targetApi="31">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true">
+        </activity>
+
+        <activity android:name=".SplashScreenActivity"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+                <category android:name="android.intent.category.LAUNCHER"/>
+            </intent-filter>
+        </activity>
+
+        <!-- LoginActivity -->
+        <activity android:name=".LoginActivity" />
+
+        <!-- RegistrationActivity -->
+        <activity android:name=".RegistrationActivity" />
+
+        <!-- QuizActivity -->
+        <activity android:name=".QuizActivity" />
+
+        <!-- RulesActivity -->
+        <activity android:name=".RulesActivity" />
+
+        <!-- ResultActivity -->
+        <activity android:name=".ResultActivity" />
+
+        <activity android:name=".QuizStatActivity" />
+
+    </application>
+
+</manifest>

app/src/main/java/com/example/quizgame_50073457/LoginActivity.java

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+package com.example.quizgame_50073457;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+import android.widget.EditText;
+import androidx.appcompat.app.AppCompatActivity;
+import android.text.TextUtils;
+import android.util.Patterns;
+import android.widget.Toast;
+
+
+public class LoginActivity extends AppCompatActivity {
+
+    private EditText email, password;
+    private Button btnLogin;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_login);
+
+        email = findViewById(R.id.editTextEmailLogin);
+        password = findViewById(R.id.editTextPasswordLogin);
+        btnLogin = findViewById(R.id.buttonLogin);
+
+
+        btnLogin.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                if (validateInputs()){
+                    if (PreferencesUtil.validateUser(LoginActivity.this, email.getText().toString(), password.getText().toString())) {
+                        // Navigate to Quiz or Rules Activity
+                        startActivity(new Intent(LoginActivity.this, RulesActivity.class));
+                        //startActivity(new Intent(LoginActivity.this, QuizActivity.class));
+                        finish();
+                    } else {
+                        // Show error
+                        Toast.makeText(LoginActivity.this, "Invalid credentials", Toast.LENGTH_SHORT).show();
+                    }
+                }
+            }
+        });
+
+    }
+
+
+    private boolean validateInputs() {
+        // Validate that the email and password fields are not empty
+        if (TextUtils.isEmpty(email.getText()) || TextUtils.isEmpty(password.getText())) {
+            Toast.makeText(LoginActivity.this, "Please enter both email and password", Toast.LENGTH_SHORT).show();
+            return false;
+        }
+
+        // Validate email format
+        if (!Patterns.EMAIL_ADDRESS.matcher(email.getText()).matches()) {
+            Toast.makeText(LoginActivity.this, "Please enter a valid email address", Toast.LENGTH_SHORT).show();
+            return false;
+        }
+
+        return true;
+    }
+
+    // Assume initialization and setContentView are done
+    private void navigateToRules() {
+        Intent intent = new Intent(LoginActivity.this, RulesActivity.class);
+        startActivity(intent);
+        finish();
+    }
+}

app/src/main/java/com/example/quizgame_50073457/MainActivity.java

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+package com.example.quizgame_50073457;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+import androidx.appcompat.app.AppCompatActivity;
+
+public class MainActivity extends AppCompatActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+
+        Button btnLogin = findViewById(R.id.btnLogin);
+        Button btnRegister = findViewById(R.id.btnRegister);
+
+        btnLogin.setOnClickListener(v -> {
+            // Navigate to LoginActivity
+            startActivity(new Intent(MainActivity.this, LoginActivity.class));
+        });
+
+        btnRegister.setOnClickListener(v -> {
+            // Navigate to RegistrationActivity
+            startActivity(new Intent(MainActivity.this, RegistrationActivity.class));
+        });
+    }
+}