title: How to refresh database reference in android
body: <p>Code</p>
  
  <pre><code>public class TakingQuiz extends AppCompatActivity {
  
  TextView que;
  TextView sco;
  TextView qn;
  Button opt1;
  Button opt2;
  Button opt3;
  Button opt4;
  String RecieversId;
  
  Integer mScore = 0;
  Integer mQuestionNumber = 1;
  String question;
  String option1;
  String option2;
  String option3;
  String option4;
  String answer;
  
  FirebaseAuth mAuth;
  FirebaseUser currentUser;
  DatabaseReference mDatabaseReference;
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.taking_quiz);
  
      que = (TextView) findViewById(R.id.txtQuestion);
      opt1 = (Button) findViewById(R.id.button1);
      opt2 = (Button) findViewById(R.id.button2);
      opt3 = (Button) findViewById(R.id.button3);
      opt4 = (Button) findViewById(R.id.button4);
      qn = (TextView) findViewById(R.id.number);
      sco = (TextView) findViewById(R.id.score);
      qn.setText("1");
      sco.setText("Score : 0");
  
      RecieversId = getIntent().getStringExtra("Recievers_Id");
  
      mAuth = FirebaseAuth.getInstance();
      currentUser = mAuth.getCurrentUser();
      mDatabaseReference = FirebaseDatabase.getInstance().getReference();
  
      updateQuestion();
  
  }
  
  private void updateQuestion() {
      mDatabaseReference.child("Users").child(RecieversId).child("Quiz").child("Question1").addValueEventListener(new ValueEventListener() {
          @Override
          public void onDataChange(DataSnapshot dataSnapshot) {
              question = dataSnapshot.child("Question").getValue().toString();
              answer = dataSnapshot.child("Answer").getValue().toString();
              option1 = dataSnapshot.child("Option1").getValue().toString();
              option2 = dataSnapshot.child("Option2").getValue().toString();
              option3 = dataSnapshot.child("Option3").getValue().toString();
              option4 = dataSnapshot.child("Option4").getValue().toString();
              que.setText(question);
              opt1.setText(option1);
              opt2.setText(option2);
              opt3.setText(option3);
              opt4.setText(option4);
  
  
      opt1.setOnClickListener(new View.OnClickListener() {
          @Override
          public void onClick(View v) {
              mQuestionNumber++;
              qn.setText("Quesion : " + mQuestionNumber);
              if (option1.equals(answer)) {
                  opt1.setBackgroundColor(Color.GREEN);
                  mScore++;
                  sco.setText("Score : " + mScore);
              } else
                  opt1.setBackgroundColor(Color.RED);
              sco.setText("Score : " + mScore);
          }
      });
      opt2.setOnClickListener(new View.OnClickListener() {
          @Override
          public void onClick(View v) {
              mQuestionNumber++;
              qn.setText("Quesion : " + mQuestionNumber);
              if (option2.equals(answer)) {
                  opt2.setBackgroundColor(Color.GREEN);
                  mScore++;
                  sco.setText("Score : " + mScore);
              } else
                  opt2.setBackgroundColor(Color.RED);
              sco.setText("Score : " + mScore);
          }
      });
      opt3.setOnClickListener(new View.OnClickListener() {
          @Override
          public void onClick(View v) {
              mQuestionNumber++;
              qn.setText("Quesion : " + mQuestionNumber);
              if (option3.equals(answer)) {
                  opt3.setBackgroundColor(Color.GREEN);
                  mScore++;
                  sco.setText("Score : " + mScore);
              } else
                  opt3.setBackgroundColor(Color.RED);
              sco.setText("Score : " + mScore);
          }
      });
      opt4.setOnClickListener(new View.OnClickListener() {
          @Override
          public void onClick(View v) {
              mQuestionNumber++;
              qn.setText("Quesion : " + mQuestionNumber);
              if (option4.equals(answer)) {
                  opt4.setBackgroundColor(Color.GREEN);
                  mScore++;
                  sco.setText("Score : " + mScore);
              } else
                  opt4.setBackgroundColor(Color.RED);
              sco.setText("Score : " + mScore);
  
          }
      });
          }
  
          @Override
          public void onCancelled(DatabaseError databaseError) {
          }
      });
  
  }
  </code></pre>
  
  <p>}
  The Question number keeps increasing so i need to refresh the database reference to get the next question in the database... how do i achieve this... the code till now is working as expected but im not sure on how to refreshit.......................................................................................................................................................</p>