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List<String> doc_Category = new ArrayList<String>(); doc_Category.add("Select Category"); fStore.collection("doc_category") .get() .addOnCompleteListener(new OnCompleteListener<QuerySnapshot>() { @Override public void onComplete(@NonNull Task<QuerySnapshot> task) { if (task.isSuccessful()) { int i = 0; for (QueryDocumentSnapshot document : task.getResult()) { doc_Category.add(document.getString("name").toString()); } } else { Log.d("DocCat", "Error getting documents: ", task.getException()); } } });
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