//ImageView Setup
ImageView imageView = new ImageView(this);

//setting height and width of imageview
LayoutParams params = new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);

//setting margins around imageimageview
params.setMargins(10,10,10); //left,top,right,bottom

//adding attributes to the imageview
imageView.setLayoutParams(params);