draw an oval shape around the text on canvas

use drawOval method().. here is the signature of the method..

public void drawOval (RectF oval, Paint paint)  

RectF is class for drawing rectangle...whose constructor is defined as following...

RectF(x,y,x+width,y+height); 

you can make its object as follows

RectF rect = new RectF(x,y,x+width,y+height);... 

now pass this object in drawOval method....

canvas.drawOval(rect,paint);  

for resolution (480 x 800)

in onCreate()

setContentView(new SampleView(this));

create class

private static class SampleView extends View {

    // CONSTRUCTOR
    public SampleView(Context context) {
        super(context);
        setFocusable(true);

    }

    @SuppressLint("DrawAllocation")
    @Override
    protected void onDraw(Canvas canvas) {

        canvas.drawColor(Color.WHITE);

        //1
        Paint paint = new Paint();
        paint.setStyle(Paint.Style.STROKE);
        paint.setColor(Color.GRAY);
        RectF oval1 = new RectF(0, 0, 250,250);

        Paint p1 = new Paint();
        p1.setColor(Color.BLACK);

        canvas.drawText("Parent", 30, 50, p1);
        canvas.drawOval(oval1, paint);


        //2
        paint.setStyle(Paint.Style.STROKE);
        paint.setColor(Color.BLUE);
        RectF oval2 = new RectF(50, 50, 150, 150);

        Paint p2 = new Paint();
        p2.setColor(Color.GREEN);

        canvas.drawText("Child", 75, 75, p2);
        canvas.drawOval(oval2, paint);
    }

}