How do I transform this code into something simpler that I am more familiar with? [closed]

Answer 1

An example of onClickListener() without lambda:

mButton.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        // do something here
    }
});

can be rewritten with lambda:

mButton.setOnClickListener((View v) -> {
    // do something here
});

So your code is using Lambda expression (Java 8 feature)