36 lines
1.1 KiB
Dart
36 lines
1.1 KiB
Dart
import 'package:shared_preferences/shared_preferences.dart';
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/// 记录上一次使用的 USB 摄像头，插拔后优先重连。
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class UsbCameraPrefs {
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static const String _lastDeviceIdKey = 'usb_camera_last_device_id';
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static const String _lastResolutionKey = 'usb_camera_last_resolution';
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static Future<String?> getLastDeviceId() async {
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final prefs = await SharedPreferences.getInstance();
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return prefs.getString(_lastDeviceIdKey);
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}
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static Future<void> setLastDeviceId(String? id) async {
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final prefs = await SharedPreferences.getInstance();
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if (id == null) {
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await prefs.remove(_lastDeviceIdKey);
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return;
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}
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await prefs.setString(_lastDeviceIdKey, id);
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}
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static Future<String?> getLastResolution() async {
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final prefs = await SharedPreferences.getInstance();
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return prefs.getString(_lastResolutionKey);
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}
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static Future<void> setLastResolution(String? resolution) async {
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final prefs = await SharedPreferences.getInstance();
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if (resolution == null) {
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await prefs.remove(_lastResolutionKey);
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return;
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}
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await prefs.setString(_lastResolutionKey, resolution);
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}
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}
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