firebase中使用颤动的二维阵列(Dart)

import 'package:cloud_firestore/cloud_firestore.dart';

// 创建一个颤动的二维阵列
List<List<int>> matrix = [
  [1, 2, 3],
  [4, 5, 6],
  [7, 8, 9],
];

// 将二维阵列存储到Firestore
void storeMatrix() async {
  CollectionReference matrixCollection = FirebaseFirestore.instance.collection('matrix');
  
  List<Map<String, int>> serializedMatrix = matrix.map((row) {
    return row.asMap().map((index, value) {
      return MapEntry(index.toString(), value);
    });
  }).toList();
  
  await matrixCollection.doc('vibratingMatrix').set({'matrix': serializedMatrix});
}

// 从Firestore中检索颤动的二维阵列
Future<List<List<int>>> retrieveMatrix() async {
  CollectionReference matrixCollection = FirebaseFirestore.instance.collection('matrix');
  
  DocumentSnapshot matrixDoc = await matrixCollection.doc('vibratingMatrix').get();
  
  List<dynamic> serializedMatrix = matrixDoc.data()['matrix'];
  
  List<List<int>> matrix = serializedMatrix.map((row) {
    return row.entries.map((entry) {
      return entry.value as int;
    }).toList();
  }).toList();
  
  return matrix;
}

// 示例使用
void main() async {
  await storeMatrix();
  
  List<List<int>> retrievedMatrix = await retrieveMatrix();
  
  print(retrievedMatrix);  // 输出：[[1, 2, 3], [4, 5, 6], [7, 8, 9]]
}