Why does my XML element not have rounded corners?

Question

I am trying to create a rectangle with rounded corners to be the background of two elements in my XML. I have created a TextView for this background called prod1_bg and set its cornerRadius to 10dp.

Why don't the prodX_bg rectangles have rounded corners even though I specified a cornerRadius of 10dp?

XML:

<?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"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".SearchResultsScreen">

    <ScrollView
        android:layout_width="407dp"
        android:layout_height="422dp"
        android:layout_marginTop="10dp"
        android:contentDescription="@string/search_results"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/searchbar">

        <LinearLayout
            android:id="@+id/linearLayout"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">

            <androidx.constraintlayout.widget.ConstraintLayout
                android:id="@+id/inner_constraint"
                android:layout_width="match_parent"
                android:layout_height="1100dp">

                **<TextView
                    android:id="@+id/prod1_bg"
                    android:layout_width="350dp"
                    android:layout_height="100dp"
                    android:background="#4A8BC34A"
                    android:visibility="invisible"
                    app:cornerRadius="10dp"
                    app:layout_constraintBottom_toBottomOf="@+id/product_img_test"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toTopOf="@+id/product_img_test" />
                <TextView
                    android:id="@+id/prod2_bg"
                    android:layout_width="350dp"
                    android:layout_height="100dp"
                    android:background="#4A8BC34A"
                    android:visibility="invisible"
                    app:cornerRadius="10dp"
                    app:layout_constraintBottom_toBottomOf="@+id/product_img_test2"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toTopOf="@+id/product_img_test2" />**


               
                <ImageButton
                    android:id="@+id/product_img_test"
                    android:layout_width="94dp"
                    android:layout_height="91dp"
                    android:layout_marginTop="20dp"
                    android:contentDescription="@string/product_desc_test"
                    android:visibility="invisible"
                    app:layout_constraintBottom_toBottomOf="parent"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintHorizontal_bias="0.139"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toTopOf="parent"
                    app:layout_constraintVertical_bias="0.0"
                    app:srcCompat="@drawable/strongbow"
                    tools:ignore="ImageContrastCheck,DuplicateSpeakableTextCheck" />

                <Button
                    android:id="@+id/product_btn_test"
                    android:layout_width="220dp"
                    android:layout_height="50dp"
                    android:background="#00FFFFFF"
                    android:textAllCaps="false"
                    android:textColor="#000000"
                    android:textSize="20sp"
                    app:layout_constraintBottom_toBottomOf="@+id/product_img_test"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintHorizontal_bias="0.1"
                    app:layout_constraintStart_toEndOf="@+id/product_img_test"
                    app:layout_constraintTop_toTopOf="@+id/product_img_test"
                    tools:ignore="DuplicateSpeakableTextCheck,SpeakableTextPresentCheck" />

                <Button
                    android:id="@+id/product_btn_test2"
                    android:layout_width="220dp"
                    android:layout_height="50dp"
                    android:background="#00FFFFFF"
                    android:textAllCaps="false"
                    android:textColor="#000000"
                    android:textSize="20sp"
                    app:layout_constraintBottom_toBottomOf="@+id/product_img_test2"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintHorizontal_bias="0.1"
                    app:layout_constraintStart_toEndOf="@+id/product_img_test"
                    app:layout_constraintTop_toTopOf="@+id/product_img_test2"
                    tools:ignore="SpeakableTextPresentCheck" />

                <ImageButton
                    android:id="@+id/product_img_test2"
                    android:layout_width="94dp"
                    android:layout_height="91dp"
                    android:layout_marginTop="20dp"
                    android:contentDescription="@string/product_desc_test"
                    android:visibility="invisible"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintHorizontal_bias="0.141"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toBottomOf="@+id/product_img_test"
                    app:srcCompat="@drawable/strongbow"
                    tools:ignore="ImageContrastCheck,DuplicateSpeakableTextCheck" />



            </androidx.constraintlayout.widget.ConstraintLayout>
        </LinearLayout>
    </ScrollView>

    <TextView
        android:id="@+id/hor_line"
        android:layout_width="0dp"
        android:layout_height="4dp"
        android:layout_marginBottom="100dp"
        android:background="#C4C4C4"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent" />

    <TextView
        android:id="@+id/ver_line"
        android:layout_width="2dp"
        android:layout_height="0dp"
        android:background="#E3E6DA"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="@+id/hor_line" />

    <com.google.android.material.imageview.ShapeableImageView
        android:id="@+id/imvCircularWithStroke"
        android:layout_width="86dp"
        android:layout_height="86dp"
        android:layout_marginBottom="56dp"
        android:background="#44A6D0"
        android:elevation="7dp"
        android:padding="0dp"
        app:layout_constraintBottom_toBottomOf="@+id/ver_line"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.498"
        app:layout_constraintStart_toStartOf="parent"
        app:shapeAppearanceOverlay="@style/Circular"
        app:strokeColor="#D0EAE6"
        app:strokeWidth="2dp"
        tools:ignore="ImageContrastCheck" />

    <ImageButton
        android:id="@+id/barcode_icon"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="76dp"
        android:background="#0044A6D0"
        android:contentDescription="@string/barcode_icon_desc"
        android:elevation="7dp"
        app:layout_constraintBottom_toBottomOf="@+id/ver_line"
        app:layout_constraintEnd_toEndOf="@+id/hor_line"
        app:layout_constraintHorizontal_bias="0.498"
        app:layout_constraintStart_toStartOf="@+id/hor_line"
        app:srcCompat="@drawable/barcode_icon"
        tools:ignore="ImageContrastCheck"
        app:tint="#FFFFFF" />

    <ImageButton
        android:id="@+id/search_btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="32dp"
        android:background="#00FFFFFF"
        android:contentDescription="@string/search_icon_desc"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.181"
        app:layout_constraintStart_toStartOf="parent"
        app:srcCompat="@drawable/search_icon" />

    <TextView
        android:id="@+id/search_btn_text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="1dp"
        android:text="@string/search_btn"
        android:textColor="#000000"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="@+id/search_btn"
        app:layout_constraintStart_toStartOf="@+id/search_btn"
        app:layout_constraintTop_toBottomOf="@+id/search_btn"
        app:layout_constraintVertical_bias="0.0" />

    <ImageButton
        android:id="@+id/calendar_btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="32dp"
        android:background="#00FFFFFF"
        android:contentDescription="@string/calendar_icon_desc"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.742"
        app:layout_constraintStart_toEndOf="@+id/search_btn"
        app:srcCompat="@drawable/calendar_icon" />

    <TextView
        android:id="@+id/calendar_btn_text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="12dp"
        android:text="@string/calendar_btn"
        android:textColor="#000000"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="@+id/calendar_btn"
        app:layout_constraintStart_toStartOf="@+id/calendar_btn" />

</androidx.constraintlayout.widget.ConstraintLayout>

Because that's not how its done. You will need to round the background image itself with a drawable. Take a look at [this](https://stackoverflow.com/q/18781902/6287910). There are a few ways mentioned there that you can round image. — Cheticamp, Dec 08 '22 at 23:48

score 1 · Accepted Answer · answered Dec 09 '22 at 04:09

IIRC, in order to use the cornerRadius attribute directly in layout file, the minimum API level for your app must be 31+ (which means it will only support devices with Android 12 and above).

You can also use some View/Layout that already support a rounded corners like CardView (will need to update Gradle dependencies).

Or you can just simply create a drawable XML file with rectangle shape (and having corners' radiuses). Then set that drawable as your TextView's background.

Sample drawable named rounded_corners_background.xml:

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
        <corners android:radius="5dp" /> <!-- corner radius -->
        <solid android:color="#ffffff" /> <!-- inner background colour -->
        <stroke android:color="#000000" /> <!-- border colour -->
</shape>

There are other attributes as well such as <gradient>, <padding>, ...

Then, in your <TextView>:

<TextView
    android:id="@+id/text_view"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@drawable/rounded_corners_background" />

I created a drawable XML file and it worked very well, thanks! — sempre_em_pe, Dec 15 '22 at 16:25

Why does my XML element not have rounded corners?

1 Answers1