Final Touches

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

@@ -4,7 +4,8 @@
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="dragosholban.com.androidpuzzlegame.MainActivity">
    tools:context="dragosholban.com.androidpuzzlegame.MainActivity"
    android:background="@drawable/table_background">

    <GridView
        android:id="@+id/grid"

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

@@ -4,18 +4,31 @@
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="dragosholban.com.androidpuzzlegame.PuzzleActivity">
    tools:context="dragosholban.com.androidpuzzlegame.PuzzleActivity"
    android:background="@drawable/table_background">

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginBottom="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:alpha="1.0"
        app:layout_constraintDimensionRatio="H,4:5"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:srcCompat="@drawable/puzzle_frame" />

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginEnd="16dp"
        android:layout_marginStart="16dp"
        android:layout_marginTop="18dp"
        android:scaleType="centerCrop"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintDimensionRatio="H,4:5"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"

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

@@ -4,7 +4,7 @@
    android:layout_height="match_parent"
    android:gravity="center"
    android:padding="2dp"
    android:background="@color/colorPrimary"
    android:background="@drawable/puzzle_frame"
    >

    <ImageView