InsertClassIdforFirebase復元

app/src/main/java/com/example/oplogy/InsertClassIdforFirebase.java

@@ -0,0 +1,19 @@
+package com.example.oplogy;
+
+import com.google.firebase.firestore.FirebaseFirestore;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class InsertClassIdforFirebase {
+    public void insertClassId(int classId) {
+        FirebaseFirestore db = FirebaseFirestore.getInstance();
+
+        Map<String, Object> data = new HashMap<>();
+        data.put("classId", classId); // classId is inserted as a number
+
+        db.collection("classId_Database").add(data)
+                .addOnSuccessListener(documentReference -> System.out.println("DocumentSnapshot added with ID: " + documentReference.getId()))
+                .addOnFailureListener(e -> System.err.println("Error adding document: " + e));
+    }
+}