Android drawing button to canvas with custom view?

How can I draw a button on top of the canvas in a custom view? (Preferably on the mid-right side) Is there something I have to call before doing the button.draw(canvas)?

    public class MyClass extends View {
    public Simulation(Context context) {
            super(context);
            pauseButton.setText("TestButton");
            pauseButton.setClickable(true);
            pauseButton.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
            Log.i(TAG, "Button Pressed!");
            }
            });
    public onDraw(Canvas canvas) {
           super.onDraw(canvas);
           pauseButton.draw(canvas);
    }
    }

Thanks for your time