RoundedTextView.java

public class RoundedTextView extends TextView {

    private float mRadius = 0f;

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

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

    public RoundedTextView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init(context, attrs);
    }

    private void init(Context context, AttributeSet attrs) {
        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.RoundedTextView);
        mRadius = a.getDimension(R.styleable.RoundedTextView_rtvRadius, 0f);
        a.recycle();

        GradientDrawable gd = new GradientDrawable();
        gd.setCornerRadius(mRadius);

        int color = Color.TRANSPARENT;
        Drawable background = getBackground();
        if (background instanceof ColorDrawable)
            color = ((ColorDrawable) background).getColor();
        gd.setColor(color);

        setBackground(gd);
    }

    public float getRadius() {
        return this.mRadius;
    }

    public void setRadius(int radius) {
        this.mRadius = radius;
    }
}