Android Squared CardView
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Recently, I had to add a perfect square CardView and I wanted to achieve this without hardcoding its width and height. I happily discovered the power of ConstraintLayout and this is how I managed to create a perfect square which should work on every dimension.
<?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" android:layout_width="match_parent" android:layout_height="wrap_content"> <androidx.cardview.widget.CardView android:id="@+id/cardView" android:layout_width="0dp" android:layout_height="0dp" android:layout_margin="8dp" app:cardElevation="8dp" app:contentPadding="16dp" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintDimensionRatio="1:1" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent"> <LinearLayout android:layout_width="wrap_content" android:layout_height="match_parent" android:layout_gravity="center" android:orientation="vertical"> <ImageView android:id="@+id/category_image" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_gravity="center" /> <TextView android:id="@+id/category_name" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_gravity="center_horizontal" android:gravity="center_horizontal"/> </LinearLayout> </androidx.cardview.widget.CardView> </androidx.constraintlayout.widget.ConstraintLayout>
In my project I created a RecyclerView with 2 columns, and this is how the result looks like.

The main attributes to achieve the square positioned like in the above image, were these:
- app:layout_constraintDimensionRatio=”1:1″
- wrap_content on the ConstraintLayout
- on the cardView the constraints are set to parent and the width and height to 0 (match_constraint)
Note: The red background is set on the recyclerView’s background.