App is now fully converted to Kotlin

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

@@ -4,7 +4,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    tools:context=".MainActivity">
+    tools:context=".Main">
 
     <com.google.android.material.appbar.AppBarLayout
         android:id="@+id/appbarlayout"

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

@@ -4,7 +4,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    tools:context=".MainActivity"
+    tools:context=".Main"
     tools:showIn="@layout/app_bar_main"
     android:id="@+id/content"
     android:background="@color/background"

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

@@ -12,7 +12,7 @@
     android:layout_marginEnd="8dp"
     android:layout_marginTop="3dp"
     android:layout_marginBottom="3dp"
-    app:cardElevation="2dp">
+    app:cardElevation="1dp">
 
     <androidx.constraintlayout.widget.ConstraintLayout
         android:layout_width="match_parent"

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

@@ -1,5 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
-<com.google.android.material.card.MaterialCardView android:layout_width="match_parent"
+<com.google.android.material.card.MaterialCardView
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
     android:layout_height="wrap_content"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:backgroundTint="@color/lightbackground"
@@ -10,8 +12,7 @@
     android:layout_marginEnd="8dp"
     android:layout_marginTop="3dp"
     android:layout_marginBottom="3dp"
-    app:cardElevation="2dp"
-    xmlns:android="http://schemas.android.com/apk/res/android">
+    app:cardElevation="1dp">
 
     <LinearLayout
         android:layout_width="match_parent"

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

@@ -1,9 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:orientation="vertical"
-    android:layout_width="match_parent"
-    android:layout_height="wrap_content"
-    android:clickable="false"
-    android:focusable="false">
-
-</LinearLayout>

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

@@ -1,51 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    android:background="@color/background"
-    android:layoutAnimation="@anim/layout_animation_fall_down">
-
-
-    <EditText
-        android:id="@+id/searchbar"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:layout_marginTop="16dp"
-        android:animateLayoutChanges="true"
-        android:ems="10"
-        android:gravity="center"
-        android:hint="@string/keyphrase"
-        android:imeOptions="flagNoExtractUi"
-        android:inputType="textNoSuggestions"
-        android:singleLine="true"
-        android:textAlignment="center"
-        android:textAppearance="@style/TextAppearance.MaterialComponents.Body1"
-        android:textColor="@color/accent"
-        android:textColorHint="@color/hintcolor"
-        android:textSize="20sp"
-        android:theme="@style/EditTextTheme"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent"/>
-
-    <androidx.core.widget.NestedScrollView
-        android:layout_width="0dp"
-        android:layout_height="0dp"
-        android:fillViewport="true"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/searchbar">
-
-        <androidx.recyclerview.widget.RecyclerView
-            android:id="@+id/linearRecyclerSearch"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:nestedScrollingEnabled="false"
-            android:layoutAnimation="@anim/layout_animation_fall_down"/>
-
-    </androidx.core.widget.NestedScrollView>
-
-
-</androidx.constraintlayout.widget.ConstraintLayout>