RoundedLinearLayout.java

public class RoundedLinearLayout extends LinearLayout {

    String TAG = getClass().getSimpleName();

    Path mPath;
    float mCornerRadius;

    public boolean isCornerSet = false;

    public RoundedLinearLayout(Context context) {
        super(context);
    }

    public RoundedLinearLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

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

    @Override
    public void draw(Canvas canvas) {
        RectF r = new RectF(0, 0, canvas.getWidth(), canvas.getHeight());
        mPath = new Path();
        if(!isCornerSet){
            mCornerRadius = canvas.getHeight()/2;
            isCornerSet = true;
        }
        mPath.addRoundRect(r, mCornerRadius, mCornerRadius, Path.Direction.CW);
        mPath.close();

        canvas.save();
        canvas.clipPath(mPath);
        super.draw(canvas);
        canvas.restore();
        Log.v(TAG, "onDraw");
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);
//        setPath(w, h);
        Log.v(TAG, "onSizeChanged");

    }

    public void setPath(int w, int h){
        RectF r = new RectF(0, 0, w, h);
        mCornerRadius = h/2;
        mPath = new Path();
        mPath.addRoundRect(r, mCornerRadius, mCornerRadius, Path.Direction.CW);
        mPath.close();
    }

    public void setCornerRadius(int radius) {
        mCornerRadius = radius;
        invalidate();
        Log.v(TAG, "setCornedRadius");

    }

    public float getCornerRadius(){
        return mCornerRadius;
    }
}