[FIXED] Minor copy paste issues.

[ADDED] Tablet device screenshots.

Author: hossain-khan

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

@@ -31,7 +31,7 @@
         See `layout_constraintWidth_percent`
     -->
     <ImageView
-        android:id="@+id/view_dimension_ratio_1to1"
+        android:id="@+id/view_dimension_demo1"
         android:layout_width="0dp"
         android:layout_height="wrap_content"
         android:layout_marginStart="30dp"
@@ -48,14 +48,14 @@
         See `layout_constraintHeight_percent`
     -->
     <ImageView
-        android:id="@+id/view_dimension_ratio_16to9_width_constrained"
+        android:id="@+id/view_dimension_demo2"
         android:layout_width="wrap_content"
         android:layout_height="0dp"
         android:background="@color/md_pink_300"
         android:src="@drawable/ic_image_black_140dp"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintHeight_percent="0.90"
-        app:layout_constraintStart_toEndOf="@+id/view_dimension_ratio_1to1"
+        app:layout_constraintStart_toEndOf="@+id/view_dimension_demo1"
         app:layout_constraintTop_toTopOf="parent" />
 </androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -37,15 +37,15 @@
         app:layout_constraintGuide_percent="0.30" />
 
     <!--
-        Horizontal guideline to use it as a end of fields at 500% of the screen.
+        Horizontal guideline to use it as a end of fields at 60% of the screen.
         After this line we have put the "LOGIN" button.
      -->
     <androidx.constraintlayout.widget.Guideline
         android:id="@+id/guideline_horizontal_bottom"
         android:layout_width="0dp"
         android:layout_height="0dp"
         android:orientation="horizontal"
-        app:layout_constraintGuide_percent="0.5" />
+        app:layout_constraintGuide_percent="0.6" />
 
     <!--
 
@@ -63,9 +63,9 @@
         android:layout_height="wrap_content"
         android:layout_marginEnd="8dp"
         android:text="Username"
-        app:layout_constraintBottom_toBottomOf="@+id/editText"
+        app:layout_constraintBottom_toBottomOf="@+id/username_input"
         app:layout_constraintEnd_toStartOf="@+id/guideline_vertical"
-        app:layout_constraintTop_toTopOf="@+id/editText" />
+        app:layout_constraintTop_toTopOf="@+id/username_input" />
 
     <TextView
         android:id="@+id/password_label"
@@ -74,12 +74,12 @@
         android:layout_height="wrap_content"
         android:layout_marginEnd="8dp"
         android:text="Password"
-        app:layout_constraintBottom_toBottomOf="@+id/editText2"
+        app:layout_constraintBottom_toBottomOf="@+id/password_input"
         app:layout_constraintEnd_toStartOf="@+id/guideline_vertical"
-        app:layout_constraintTop_toTopOf="@+id/editText2" />
+        app:layout_constraintTop_toTopOf="@+id/password_input" />
 
     <EditText
-        android:id="@+id/editText"
+        android:id="@+id/username_input"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:ems="10"
@@ -89,13 +89,13 @@
         app:layout_constraintTop_toTopOf="@+id/guideline_horizontal_top" />
 
     <EditText
-        android:id="@+id/editText2"
+        android:id="@+id/password_input"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:ems="10"
         android:inputType="textPassword"
         app:layout_constraintStart_toStartOf="@+id/guideline_vertical"
-        app:layout_constraintTop_toBottomOf="@+id/editText" />
+        app:layout_constraintTop_toBottomOf="@+id/username_input" />
 
     <Button
         android:id="@+id/login_button"

build.gradle

@@ -16,7 +16,7 @@ buildscript {
      * https://github.com/JetBrains/kotlin/releases
      * https://blog.jetbrains.com/kotlin/category/releases/
      */
-    ext.kotlinVersion = '1.3.20'
+    ext.kotlinVersion = '1.3.21'
 
     /*
      * Android Plugin for Gradle - Version number and release notes