Flutter Desktop Apps: Getting Started
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Android Studio
Let’s test this out by deleting our todos and writing the import code.
final result = await FilePicker.platform.pickFiles(
dialogTitle: 'Open file',
allowedExtensions: ['todo'],
type: FileType.custom
);
if (result == null || result.files.isEmpty) {
return;
}
final path = result.files[0].path;
// 1
if (path != null) {
// 2
final file = File(path);
// 3
if (await file.exists()) {
// 4
final repository = ref.read(repositoryProvider);
// 5
file.readAsString().then((String contents) async {
// 6
final jsonArray = jsonDecode(contents) as List<dynamic>;
// 7
await Future.forEach(jsonArray, (value) async {
final map = value as Map<String, dynamic>;
var list = TodoList.fromJson(map);
// 8
list = list.copyWith(id: -1);
// 9
final todoListId = await repository.addTodoList(list);
// 10
await Future.forEach(list.categories, (category) async {
// 11
category = category.copyWith(id: -1, todoList: todoListId);
// 12
final categoryId = await repository.addCategory(category);
await Future.forEach(category.todos, (todo) async {
todo = todo.copyWith(id: -1, category: categoryId);
await repository.addTodo(todo);
});
});
});
});
}
}