Programmatically creating an ImageButton and giving it an image (Android)?

Question

Java

I created my own class with the ImageButton parent and now I want to pass an image to it.
I have recently studied android and still do not understand the features of working with resources.
I got it this way -
ViewGroup.LayoutParams lpView = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
CubeButton cubeBtn = new CubeButton(this); //this is the button itself, the successor of ImageButton
cubeBtn.setImageDrawable(getDrawable(R.drawable.grass_01)); //this should work like this
linLayout.addView(cubeBtn, lpView);
I take the drawing from the file loaded in drawable. As I understand it, a wrapper class is created for the files placed there, this same Drawable. (This is a hidden question, if everything is wrong, please correct
it) Question (main) - am I doing it right and how can I do it again (IntelliJ IDEA swears that this option can be used with 21 api, and my minimum is 19 )?

Answer 1

setImageResource(R.drawable.grass_01)