Telling me the variable "facts" is never used.

    View.OnClickListener listener = new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    //Create an Array [] indicate that this will be an array. elements of
                    //arrays are on per line.
                    String[] facts = {
                            "Ants stretch when they wake up in the morning.",
                            "Ostriches can run faster than horses.",
                            "Olympic gold medals are actually made mostly of silver.",
                            "You are born with 300 bones; by the time you are an adult you will have 206.",
                            "It takes about 8 minutes for light from the Sun to reach Earth.",
                            "Some bamboo plants can grow almost a meter in just one day.",
                            "The state of Florida is bigger than England.",
                            "Everyone is out to get you.",
                            "On average, it takes 66 days to form a new habit.",
                            "Mammoths still walked the earth when the Great Pyramid was being built.",
                            "treehouse is not actually in a tree"};
                    }
                // The button was clicked, so update the fact label with a new fact.
                    //create a string called fact and assign it a blank string "";
                    String fact = "";
                    // create a variable called randomGenerator, make it new Random
                    Random randomGenerator = new Random(); //Contruct a new Random Number Generator
                    // take randomNumber and assign a random integer from RandomGenerator up to, but excluding 3
                    int randomNumber = randomGenerator.nextInt(facts.length);

                    fact = facts[randomNumber];
                    //Update the label with our dynamic fact
                    factLabel.setText(fact);

            };