How can I set an ImageView's position dynamically in Constraint Layout

I have a dynamically created ImageView in one ConstraintLayout. Once I run the app the ImageView is showing on left top corner because no position is defined for the ImageView.

How can I set the position(let's say CENTER) of the ImageView dynamically?

I have written the below code:

ConstraintLayout layout = (ConstraintLayout) findViewById(R.id.constraintLayout);

ImageView imageView = new ImageView(ChooseOptionsActivity.this);
imageView.setImageResource(R.drawable.redlight);

layout.addView(imageView);

setContentView(layout);

Any suggestion is highly appreciated.