I had this:

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    <Button
        android:id="@+id/buttonItemButton"
        android:layout_width="124dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="5dp"
        android:layout_marginTop="5dp"
        android:background="@drawable/blue_button"
        android:fontFamily="@font/okuda"
        android:paddingTop="45dp"
        android:text=""
        android:textColor="#000000" />
</LinearLayout>

 And I changed it to this:

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="124dp"
    android:layout_height="wrap_content"
    android:orientation="vertical" >
    <Button
        android:id="@+id/buttonItemButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="5dp"
        android:layout_marginTop="5dp"
        android:background="@drawable/blue_button"
        android:fontFamily="@font/okuda"
        android:paddingTop="45dp"
        android:text=""
        android:textColor="#000000" />
</LinearLayout>