CardView: image's corners is not rounded in Android 4.3?

Question

Android Studio version: 2.3.3, Android 4.3

I am using CardView and want to round image's corners.

Layout:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    android:layout_width="@dimen/card_width"
    android:layout_height="@dimen/card_width"
    android:layout_gravity="center"
    android:gravity="center"
    android:orientation="vertical">
    <android.support.v7.widget.CardView
        android:id="@+id/card_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="center"
        card_view:cardCornerRadius="15dp">

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_gravity="center">
            <ImageView
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:scaleType="centerCrop"
                android:src="@drawable/img_lights" />
        </RelativeLayout>
    </android.support.v7.widget.CardView>
</LinearLayout>

As you can ses I set

card_view:cardCornerRadius="15dp

Here is the result:

But image's corners is not rounded. Why?

Answer 1

Please Try this Class for Image Round corner

public class RoundedCornerImageLayout extends FrameLayout {
private final static float CORNER_RADIUS = 30.0f;
private float cornerRadius;

public RoundedCornerImageLayout(Context context) {
    super(context);
    init(context, null, 0);
}

public RoundedCornerImageLayout(Context context, AttributeSet attrs) {
    super(context, attrs);
    init(context, attrs, 0);
}

public RoundedCornerImageLayout(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    init(context, attrs, defStyle);
}

private void init(Context context, AttributeSet attrs, int defStyle) {
    DisplayMetrics metrics = context.getResources().getDisplayMetrics();
    cornerRadius = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, CORNER_RADIUS, metrics);
    setLayerType(View.LAYER_TYPE_SOFTWARE, null);
}


@Override
protected void dispatchDraw(Canvas canvas) {
    int count = canvas.save();

    final Path path = new Path();
    path.addRoundRect(new RectF(0, 0, canvas.getWidth(), canvas.getHeight()), cornerRadius, cornerRadius, Path.Direction.CW);
    canvas.clipPath(path, Region.Op.INTERSECT);

    canvas.clipPath(path);
    super.dispatchDraw(canvas);
    canvas.restoreToCount(count);
 }
}

In Xml

<com.utils.RoundedCornerImageLayout 
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:layout_gravity="center"
                    android:layout_margin="@dimen/dimen_5">

                    <ImageView
                        android:id="@+id/img1"
                        android:layout_width="match_parent"
                        android:layout_height="match_parent"
                        android:background="@color/scout_report_color"
                        android:scaleType="fitXY" />
                </com.utils.RoundedCornerImageLayout>