A {@link android.widget.RelativeLayout} that supports rounded corners and proper child view clipping. Perfect for situations where you have full bleed images that you want clipped to the bounds of this layout.

attrs.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <declare-styleable name="RoundedRelativeLayout">
        <attr name="cornerRadius" format="dimension"/>
    </declare-styleable>

</resources>

RoundedRelativeLayout.java

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Path;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.widget.RelativeLayout;

/**
 * A {@link android.widget.RelativeLayout} that supports rounded corners.
 *
 * @author Jerrell Mardis
 */
public class RoundedRelativeLayout extends RelativeLayout {

    private Path mPath = new Path();
    private float mRadius = 0;

    public RoundedRelativeLayout(Context context) {
        super(context);
        setWillNotDraw(false);
    }

    public RoundedRelativeLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
        setWillNotDraw(false);

        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.RoundedRelativeLayout);
        try {
            mRadius = a.getDimension(R.styleable.RoundedRelativeLayout_cornerRadius, 0);
        } finally {
            a.recycle();
        }
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);
        mPath = new Path();
        mPath.addRoundRect(new RectF(mRadius, mRadius, w, h), mRadius, mRadius, Path.Direction.CW);
        mPath.close();
    }

    @Override
    public void draw(Canvas canvas) {
        canvas.save();
        canvas.clipPath(mPath);
        super.draw(canvas);
        canvas.restore();
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        setMeasuredDimension(getMeasuredWidth(), getMeasuredHeight());
    }
}