クラスIDを元にデータの受信

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

@@ -0,0 +1,66 @@
+package com.example.oplogy;
+
+import android.util.Log;
+
+import com.google.android.gms.tasks.OnCompleteListener;
+import com.google.android.gms.tasks.Task;
+import com.google.firebase.Timestamp;
+import com.google.firebase.firestore.CollectionReference;
+import com.google.firebase.firestore.FirebaseFirestore;
+import com.google.firebase.firestore.QueryDocumentSnapshot;
+import com.google.firebase.firestore.QuerySnapshot;
+
+import java.util.List;
+import java.util.Map;
+
+public class FirestoreReception {
+
+    private FirebaseFirestore db;
+
+    public FirestoreReception() {
+        db = FirebaseFirestore.getInstance();
+    }
+
+    //ClassIdを引数にデータの作成を行う
+    public void getDocumentsByClassId(int classId) {
+        CollectionReference collectionRef = db.collection("QuestionnaireForms");
+
+        // classIdが引数のものを取得する
+        collectionRef.whereEqualTo("classId", classId).get()
+                .addOnCompleteListener(new OnCompleteListener<QuerySnapshot>() {
+                    @Override
+                    public void onComplete(Task<QuerySnapshot> task) {
+                        if (task.isSuccessful()) {
+                            // データの取得に成功した場合
+                            for (QueryDocumentSnapshot document : task.getResult()) {
+                                Map<String, Object> data = document.getData();
+
+                                // デバッグ用のログ出力
+                                Log.d("FirestoreReception", "Document ID: " + document.getId());
+                                Log.d("FirestoreReception", "Data: " + data);
+
+                                // ここでデータを取得し、必要に応じて処理を行います
+//                                String parentName = (String) data.get("patronName");
+//                                String childName = (String) data.get("childName");
+//                                String studentId = (String) data.get("studentNumber");
+////                                Timestamp address = (Timestamp) data.get("address");
+//                                List<Timestamp> firstDay = (List<Timestamp>) data.get("firstDay");
+//                                List<Timestamp> secondDay = (List<Timestamp>) data.get("secondDay");
+//                                List<Timestamp> thirdDay = (List<Timestamp>) data.get("thirdDay");
+//
+//                                // 取得したデータを使って必要な処理を行う
+//                                Log.d("FirestoreReception", "ParentName: " + parentName);
+//                                Log.d("FirestoreReception", "ChildName: " + childName);
+//                                Log.d("FirestoreReception", "StudentNumber: " + studentId);
+////                                Log.d("FirestoreReception", "Address: " + address.toDate());
+//                                Log.d("FirestoreReception", "First Day: " + firstDay);
+//                                Log.d("FirestoreReception", "Second Day: " + secondDay);
+//                                Log.d("FirestoreReception", "Third Day: " + thirdDay);
+                            }
+                        } else {
+                            Log.w("FirestoreReception", "Error getting documents.", task.getException());
+                        }
+                    }
+                });
+    }
+}

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

@@ -9,6 +9,8 @@ import android.widget.Button;
 import android.widget.ImageView;
 import android.widget.TextView;
 
+import com.google.firebase.firestore.FirebaseFirestore;
+
 public class MainActivity extends AppCompatActivity implements View.OnClickListener{
 
     //    ID作成のTextViewとImageView
@@ -28,6 +30,12 @@ public class MainActivity extends AppCompatActivity implements View.OnClickListe
     private int previousRoot = 0; //元の画像のインデックス
     //    提出状況のTextViewとImageView
     private TextView submission;
+
+    //firestoreの受信関連
+    private FirebaseFirestore db;
+    private FirestoreReception firestoreReception;
+
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -51,6 +59,14 @@ public class MainActivity extends AppCompatActivity implements View.OnClickListe
         submission = findViewById(R.id.submission);
         submission.setOnClickListener(this);
 
+//      firestoreの受信関連
+        db = FirebaseFirestore.getInstance();
+        firestoreReception = new FirestoreReception();
+
+        firestoreReception.getDocumentsByClassId(100);
+
+
+
 
     }