Question

What is the most efficient way of instanciating variables for performance and memory?

this :

Context context = this;
Resources resources = context.getResources();
Drawable drawable = resources.getDrawable(R.drawable.image);
ListView list = (ListView) context.findViewById(R.id.list);
list.setBackgroundDrawable(drawable);

or this :

((ListView) findViewById(R.id.list)).setBackgroundDrawable(getResources().getDrawable(R.drawable.image));

or it doesn’t matter, it is does the same so I should stick with what I like the most?

Answer 1

Doesn’t matter. The same number of objects are created. I’d prefer the first for sake of readability. I’d skip the first line though.