选择罗盘图片

2022-07-05 16:44:07 +08:00
parent cb01d55de0
commit 22251e8e12
6 changed files with 356 additions and 166 deletions
--- a/lib/states/compass_image.dart
+++ b/lib/states/compass_image.dart
@ -0,0 +1,69 @@
+import 'dart:io';
+
+import 'package:flutter/widgets.dart';
+import 'package:image_picker/image_picker.dart';
+import 'package:path/path.dart';
+import 'package:path_provider/path_provider.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+class CompassImageProvider extends ChangeNotifier {
+  CompassImageProvider() {
+    loadCompassImage();
+  }
+
+  final Future<SharedPreferences> _prefs = SharedPreferences.getInstance();
+  ImageProvider _rotateImage;
+
+  ImageProvider get rotateImage => _rotateImage;
+
+//  加载罗盘图片
+  void loadCompassImage() async {
+    final prefs = await _prefs;
+    final appDataDirectory = await getApplicationDocumentsDirectory();
+    String pathString = prefs.getString('rotate_image');
+    if (pathString != null) {
+      File file = File(join(appDataDirectory.path, pathString));
+      var isFileExist = await file.exists();
+      if (isFileExist) {
+        _rotateImage = FileImage(file);
+      } else {
+        _rotateImage = null;
+      }
+    } else {
+      _rotateImage = null;
+    }
+    notifyListeners();
+  }
+
+  void setSelectedRotateImage(XFile res) async {
+    final appDataDirectory = await getApplicationDocumentsDirectory();
+    print(res.path);
+    String pathString = res.name;
+    if (pathString == null) {
+      return;
+    }
+    // imageCache.clear();
+    // res.saveTo(join(appDataDirectory.path, res.name));
+    res.saveTo(
+        join(appDataDirectory.path, 'rotate_image${extension(res.name)}'));
+    final prefs = await _prefs;
+    // final appDataDirectory = await getApplicationDocumentsDirectory();
+
+    // File file = File(join(appDataDirectory.path, pathString));
+    // File file =
+    //     File(join(appDataDirectory.path, 'rotate_image${extension(res.name)}'));
+    File file = File(res.path);
+    print(file);
+    var isFileExist = await file.exists();
+    print(isFileExist);
+    if (isFileExist) {
+      _rotateImage = FileImage(file);
+    } else {
+      _rotateImage = null;
+    }
+    prefs.setString('rotate_image', 'rotate_image${extension(res.name)}');
+    // prefs.setString('rotate_image', pathString);
+    // imageCache.clearLiveImages();
+    notifyListeners();
+  }
+}