How to refresh random number on click listener?

I have managed to create a simple guessing game (this works fine) the only problem is I cant seem to refresh the random number that I generate at the start.

import java.util.Random;

public class MainActivity extends AppCompatActivity {

private TextView hint;
private Button enterGuess;
private EditText chosenNumber;

Random rand = new Random();
int secretNumber = rand.nextInt(99) + 1;

@Override
protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);


    enterGuess = findViewById(R.id.buttonEnter);
    chosenNumber = findViewById(R.id.etEnterNumber);
    hint = findViewById(R.id.tvHint);

    final String hintHigh = "Guess Higher";
    final String hintLow = "Guess Lower";
    final String correctGuess = "Correct! Guess the new number!";


    enterGuess.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            int number = Integer.parseInt(chosenNumber.getText().toString());

            if (number < secretNumber){
                hint.setText(hintHigh);
            }
            else if (number > secretNumber) {
                hint.setText(hintLow);
            }
            else {
                hint.setText(correctGuess);

                Random rand = new Random();
                int secretNumber = rand.nextInt(99) + 1;

            }
        }
    });
}
}