Added audio hints, fixed bugs

app/src/main/java/com/example/firstapp/MainMenuFragment.java

@@ -0,0 +1,45 @@
+package com.example.firstapp;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+import androidx.annotation.NonNull;
+import androidx.fragment.app.Fragment;
+import androidx.navigation.fragment.NavHostFragment;
+
+import com.example.firstapp.databinding.FragmentMainMenuBinding;
+
+import java.util.Random;
+
+public class MainMenuFragment extends Fragment {
+
+private FragmentMainMenuBinding binding;
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+      binding = FragmentMainMenuBinding.inflate(inflater, container, false);
+      return binding.getRoot();
+    }
+
+    public void onViewCreated(@NonNull View view, Bundle savedInstanceState) {
+        super.onViewCreated(view, savedInstanceState);
+
+        view.findViewById(R.id.quiz_button).setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                NavHostFragment.findNavController(MainMenuFragment.this)
+                        .navigate(R.id.action_MainMenuFragment_to_FirstFragment);
+            }
+        });
+    }
+
+@Override
+    public void onDestroyView() {
+        super.onDestroyView();
+        binding = null;
+    }
+
+}

app/src/main/java/com/example/firstapp/Question.java

@@ -1,10 +1,13 @@
 package com.example.firstapp;
 
+import java.io.File;
+
 public class Question {
-    private String question, first, second, third, fourth, answer, hint;
+    private String question, first, second, third, fourth, answer;
+    private int hint;
 
     // Constructor
-    public Question(String question, String first, String second, String third, String fourth, String answer, String hint) {
+    public Question(String question, String first, String second, String third, String fourth, String answer, int hint) {
         this.question = question;
         this.first = first;
         this.second = second;
@@ -63,11 +66,11 @@ public void setAnswer(String answer) {
         this.answer = answer;
     }
 
-    public String getHint() {
+    public int getHint() {
         return hint;
     }
 
-    public void setHint(String hint) {
+    public void setHint(int hint) {
         this.hint = hint;
     }
 }

app/src/main/res/layout/fragment_first.xml

@@ -91,4 +91,15 @@
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
+    <Button
+        android:id="@+id/back_to_menu"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="Button"
+        android:visibility="gone"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/question" />
+
 </androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/fragment_main_menu.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@color/screenBackground2"
+    tools:context=".MainMenuFragment">
+
+    <Button
+        android:id="@+id/quiz_button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/start_quiz"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/navigation/nav_graph.xml

@@ -3,26 +3,26 @@
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/nav_graph"
-    app:startDestination="@id/FirstFragment">
+    app:startDestination="@id/SecondFragment">
 
     <fragment
         android:id="@+id/FirstFragment"
         android:name="com.example.firstapp.FirstFragment"
-        android:label="@string/first_fragment_label"
+        android:label="@string/quiz_label"
         tools:layout="@layout/fragment_first" >
 
         <action
-            android:id="@+id/action_FirstFragment_to_SecondFragment"
+            android:id="@+id/action_FirstFragment_to_MainMenuFragment"
             app:destination="@id/SecondFragment" />
     </fragment>
     <fragment
         android:id="@+id/SecondFragment"
-        android:name="com.example.firstapp.SecondFragment"
-        android:label="@string/second_fragment_label"
-        tools:layout="@layout/fragment_second" >
+        android:name="com.example.firstapp.MainMenuFragment"
+        android:label="@string/main_menu_fragment_label"
+        tools:layout="@layout/fragment_main_menu" >
 
         <action
-            android:id="@+id/action_SecondFragment_to_FirstFragment"
+            android:id="@+id/action_MainMenuFragment_to_FirstFragment"
             app:destination="@id/FirstFragment" />
         <argument
             android:name="myArg"

app/src/main/res/values-zh-rCN/strings.xml

@@ -1,16 +1,17 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <string name="app_name">首个应用</string>
+    <string name="app_name">内存通道</string>
     <string name="action_settings">设置</string>
-    <string name="first_fragment_label">第一个片段</string>
-    <string name="second_fragment_label">第二个片段</string>
-    <string name="previous">以前的</string>
+    <string name="quiz_label">测验</string>
+    <string name="main_menu_fragment_label">主菜单</string>
     <string name="hello_first_fragment">0</string>
-    <string name="random_heading">这是一个介于 0 和</string>
     <string name="first_choice_text">第一</string>
     <string name="second_choice_text">第二</string>
     <string name="third_choice_text">第三</string>
     <string name="fourth_choice_text">第四</string>
     <string name="answered_correctly">%1$d</string>
-    <string name="answered_all_questions">回答了所有问题</string>
+    <string name="answered_all_questions">您回答了所有问题</string>
+    <string name="loading">加载请稍候</string>
+    <string name="start_quiz">开始测验</string>
+    <string name="back_to_menu">返回菜单</string>
 </resources>

app/src/main/res/values-zh-rTW/strings.xml

@@ -1,16 +1,17 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <string name="app_name">首個應用</string>
+    <string name="app_name">內存通道</string>
     <string name="action_settings">設置</string>
-    <string name="first_fragment_label">第一個片段</string>
-    <string name="second_fragment_label">第二個片段</string>
-    <string name="previous">以前的</string>
+    <string name="quiz_label">測驗</string>
+    <string name="main_menu_fragment_label">主菜單</string>
     <string name="hello_first_fragment">0</string>
-    <string name="random_heading">這是一個介於 0 和</string>
     <string name="first_choice_text">第一</string>
     <string name="second_choice_text">第二</string>
     <string name="third_choice_text">第三</string>
     <string name="fourth_choice_text">第四</string>
     <string name="answered_correctly">%1$d</string>
-    <string name="answered_all_questions">回答了所有問題</string>
+    <string name="answered_all_questions">您回答了所有問題</string>
+    <string name="loading">加載請稍候</string>
+    <string name="start_quiz">開始測驗</string>
+    <string name="back_to_menu">返回菜單</string>
 </resources>

app/src/main/res/values/colors.xml

@@ -10,4 +10,5 @@
     <color name="screenBackground">#2196F3</color>
     <color name="buttonBackground">#BBDEFB</color>
     <color name="screenBackground2">#26C6DA</color>
+    <color name="highlight_button">#E60C0C</color>
 </resources>

app/src/main/res/values/strings.xml

@@ -1,17 +1,17 @@
 <resources>
-    <string name="app_name">FirstApp</string>
+    <string name="app_name">Memory Lane</string>
     <string name="action_settings">Settings</string>
     <!-- Strings used for fragments for navigation -->
-    <string name="first_fragment_label">First Fragment</string>
-    <string name="second_fragment_label">Second Fragment</string>
-    <string name="previous">Previous</string>
-
+    <string name="quiz_label">Quiz</string>
+    <string name="main_menu_fragment_label">Main Menu</string>
     <string name="hello_first_fragment">0</string>
-    <string name="random_heading">Here is a random number between 0 and %d.</string>
     <string name="first_choice_text">First</string>
     <string name="second_choice_text">Second</string>
     <string name="third_choice_text">Third</string>
     <string name="fourth_choice_text">Fourth</string>
     <string name="answered_correctly">%1$d</string>
     <string name="answered_all_questions">Answered all questions</string>
+    <string name="loading">Loading... Please Wait</string>
+    <string name="back_to_menu">Back to Menu</string>
+    <string name="start_quiz">Start Quiz</string>
 </resources>