How to Apply Corner Radius to LinearLayout

You can create an XML file in the drawable folder. Call it, for example, shape.xml

In shape.xml:

<shape
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle"   >
    
    <solid
        android:color="#888888" >
    </solid>
    
    <stroke
        android:width="2dp"
        android:color="#C4CDE0" >
    </stroke>
     
    <padding
        android:left="5dp"
        android:top="5dp"
        android:right="5dp"
        android:bottom="5dp"    >
    </padding>
     
    <corners
        android:radius="11dp"   >
    </corners>
     
</shape>

The <corner> tag is for your specific question.

Make changes as required.

And in your whatever_layout_name.xml:

<LinearLayout
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:layout_margin="5dp"
    android:background="@drawable/shape"    >
</LinearLayout>

This is what I usually do in my apps.

You would use a Shape Drawable as the layout's background and set its cornerRadius. Check this blog for a detailed tutorial

try this, for Programmatically to set a background with radius to LinearLayout or any View.

 private Drawable getDrawableWithRadius() {

    GradientDrawable gradientDrawable   =   new GradientDrawable();
    gradientDrawable.setCornerRadii(new float[]{20, 20, 20, 20, 20, 20, 20, 20});
    gradientDrawable.setColor(Color.RED);
    return gradientDrawable;
}

LinearLayout layout = new LinearLayout(this);
layout.setBackground(getDrawableWithRadius());

Layout

<LinearLayout 
    android:id="@+id/linearLayout"
    android:layout_width="300dp"
    android:gravity="center"
    android:layout_height="300dp"
    android:layout_centerInParent="true"
    android:background="@drawable/rounded_edge">
 </LinearLayout>

Drawable folder rounded_edge.xml

<shape 
xmlns:android="http://schemas.android.com/apk/res/android">
    <solid 
        android:color="@android:color/darker_gray">
    </solid>
    <stroke 
         android:width="0dp" 
         android:color="#424242">
    </stroke>
    <corners 
         android:topLeftRadius="100dip"
         android:topRightRadius="100dip"
         android:bottomLeftRadius="100dip"
         android:bottomRightRadius="100dip">
    </corners>
</shape>