Not Allowing users Add same Named Child Firebase Android?

I was Trying to add childs(Programmes) to the Above reference STUDENTS.

So the issue is when I retrieve the keys and add them to the ArrayList of Strings.

And check Whether it Matches the entered Text it gives ; Like Example; in the photo, we have Three Programmes bps,cs,mm.

it gives me matches, not matches,not matches result what I want is whether it matches or not like as above.

CODE

        // retreiving the edittext to String          String prnamez = programmeName.getEditableText().toString().trim().toLowerCase();            // checking if the program already exists          FirebaseAuth autha = FirebaseAuth.getInstance();            DatabaseReference dnn = FirebaseDatabase.getInstance()                  .getReference("Admin").child(autha.getUid()).child("INSTITUTE")                  .child("STUDENTS");            // arraylist to add the keys of the programme          ArrayList<String> pgName = new ArrayList<>();              // value event listener          dnn.addValueEventListener(new ValueEventListener() {              @Override              public void onDataChange(@NonNull DataSnapshot snapshot) {                  if (snapshot.exists()) {                        progressBar.setVisibility(View.VISIBLE);                    // going through all the keys and adding them to the arraaylist of pgName                      for (DataSnapshot regis : snapshot.getChildren()) {                            // retrieved the programme Name                          pgName.add(regis.getKey().toString());                          }                        // going through the lenght of the array list                      for (int i = 0; i < pgName.size(); i++) {                           // if the entered programme matches already existing programme name                          // then show this custom Toast                            if (pgName.get(i).equals(prnamez)) {                              // custom Toast                              StyleableToast.makeText(Programme_students.this,                                      "Matches", R.style.exampleToast).show();                          } else {                                StyleableToast.makeText(Programme_students.this,                                      "not Matches", R.style.exampleToast).show();                                                            // WANT TO ADD NEW PROGRAMME IN THIS CASE                           }                          }                      }              }                @Override              public void onCancelled(@NonNull DatabaseError error) {                }          });      }  });  

https://stackoverflow.com/questions/66739330/not-allowing-users-add-same-named-child-firebase-android March 22, 2021 at 09:38AM