✨ Add shouldDeletePreviewFile.

Remove `DeviceUtils`. ref: #23 (comment) .

Author: AlexV525

README-ZH.md

@@ -53,6 +53,7 @@ Flutter SDK：`>=1.20.0` 。
 | enableSetExposure            | `bool`                         | 用户是否可以在界面上通过点击设定曝光点                             | `true`                                 |
 | enableExposureControlOnPoint | `bool`                         | 用户是否可以根据已经设置的曝光点调节曝光度                         | `true`                                 |
 | enablePinchToZoom            | `bool`                         | 用户是否可以在界面上双指缩放相机对焦                               | `true`                                 |
+| shouldDeletePreviewFile      | `bool`                         | 返回页面时是否删除预览文件                                    | `false`                                |
 | maximumRecordingDuration     | `Duration`                     | 录制视频最长时长                                                 | `const Duration(seconds: 15)`          |
 | theme                        | `ThemeData`                    | 选择器的主题                                                     | `CameraPicker.themeData(C.themeColor)` |
 | textDelegate                 | `CameraPickerTextDelegate`     | 控制部件中的文字实现                                             | `DefaultCameraPickerTextDelegate`      |

README.md

@@ -79,6 +79,7 @@ Reference:
 | enableSetExposure            | `bool`                         | Whether users can set the exposure point by tapping.                                        | `true`                                 |
 | enableExposureControlOnPoint | `bool`                         | Whether users can adjust exposure according to the set point.                               | `true`                                 |
 | enablePinchToZoom            | `bool`                         | Whether users can zoom the camera by pinch.                                                 | `true`                                 |
+| shouldDeletePreviewFile      | `bool`                         | Whether the preview file will be delete when pop.                                           | `false`                                |
 | maximumRecordingDuration     | `Duration`                     | The maximum duration of the video recording process.                                        | `const Duration(seconds: 15)`          |
 | theme                        | `ThemeData`                    | Theme data for the picker.                                                                  | `CameraPicker.themeData(C.themeColor)` |
 | textDelegate                 | `CameraPickerTextDelegate`     | Text delegate that controls text in widgets.                                                | `DefaultCameraPickerTextDelegate`      |

lib/src/constants/constants.dart

@@ -12,7 +12,6 @@ import 'package:wechat_camera_picker/wechat_camera_picker.dart';
 export 'package:photo_manager/photo_manager.dart';
 
 export '../delegates/camera_picker_text_delegate.dart';
-export '../utils/device_utils.dart';
 export 'colors.dart';
 export 'screens.dart';
 

lib/src/utils/device_utils.dart

@@ -35,6 +35,7 @@ class CameraPicker extends StatefulWidget {
     this.enableSetExposure = true,
     this.enableExposureControlOnPoint = true,
     this.enablePinchToZoom = true,
+    this.shouldDeletePreviewFile = false,
     this.maximumRecordingDuration = const Duration(seconds: 15),
     this.theme,
     this.resolutionPreset = ResolutionPreset.max,
@@ -48,6 +49,7 @@ class CameraPicker extends StatefulWidget {
         assert(enablePinchToZoom != null),
         assert(enableSetExposure != null),
         assert(enableExposureControlOnPoint != null),
+        assert(shouldDeletePreviewFile != null),
         assert(maximumRecordingDuration != null),
         assert(resolutionPreset != null),
         assert(cameraQuarterTurns != null),
@@ -94,6 +96,10 @@ class CameraPicker extends StatefulWidget {
   /// 用户是否可以在界面上双指缩放相机对焦
   final bool enablePinchToZoom;
 
+  /// Whether the preview file will be delete when pop.
+  /// 返回页面时是否删除预览文件
+  final bool shouldDeletePreviewFile;
+
   /// The maximum duration of the video recording process.
   /// 录制视频最长时长
   ///
@@ -130,6 +136,7 @@ class CameraPicker extends StatefulWidget {
     bool enableSetExposure = true,
     bool enableExposureControlOnPoint = true,
     bool enablePinchToZoom = true,
+    bool shouldDeletePreviewFile = false,
     Duration maximumRecordingDuration = const Duration(seconds: 15),
     ThemeData theme,
     int cameraQuarterTurns = 0,
@@ -156,6 +163,7 @@ class CameraPicker extends StatefulWidget {
           enableSetExposure: enableSetExposure,
           enableExposureControlOnPoint: enableExposureControlOnPoint,
           enablePinchToZoom: enablePinchToZoom,
+          shouldDeletePreviewFile: shouldDeletePreviewFile,
           maximumRecordingDuration: maximumRecordingDuration,
           theme: theme,
           cameraQuarterTurns: cameraQuarterTurns,
@@ -329,6 +337,8 @@ class CameraPickerState extends State<CameraPicker>
 
   bool get enablePinchToZoom => widget.enablePinchToZoom;
 
+  bool get shouldDeletePreviewFile => widget.shouldDeletePreviewFile;
+
   /// Getter for `widget.maximumRecordingDuration` .
   Duration get maximumRecordingDuration => widget.maximumRecordingDuration;
 
@@ -642,6 +652,7 @@ class CameraPickerState extends State<CameraPicker>
           pickerType: CameraPickerViewType.image,
           previewXFile: await controller.takePicture(),
           theme: theme,
+          shouldDeletePreviewFile: shouldDeletePreviewFile,
         );
         if (entity != null) {
           Navigator.of(context).pop(entity);
@@ -721,6 +732,7 @@ class CameraPickerState extends State<CameraPicker>
           pickerType: CameraPickerViewType.video,
           previewXFile: file,
           theme: theme,
+          shouldDeletePreviewFile: shouldDeletePreviewFile,
         );
         if (entity != null) {
           Navigator.of(context).pop(entity);

lib/src/widget/camera_picker.dart

@@ -24,9 +24,12 @@ class CameraPickerViewer extends StatefulWidget {
     @required this.pickerType,
     @required this.previewXFile,
     @required this.theme,
-  })  : assert(
-          theme != null && previewXFile != null && pickerState != null,
-        ),
+    this.shouldDeletePreviewFile = false,
+  })  : assert(pickerState != null),
+        assert(pickerType != null),
+        assert(previewXFile != null),
+        assert(theme != null),
+        assert(shouldDeletePreviewFile != null),
         super(key: key);
 
   /// State of the picker.
@@ -45,6 +48,10 @@ class CameraPickerViewer extends StatefulWidget {
   /// 选择器使用的主题
   final ThemeData theme;
 
+  /// Whether the preview file will be delete when pop.
+  /// 返回页面时是否删除预览文件
+  final bool shouldDeletePreviewFile;
+
   /// Static method to push with the navigator.
   /// 跳转至选择预览的静态方法
   static Future<AssetEntity> pushToViewer(
@@ -53,13 +60,15 @@ class CameraPickerViewer extends StatefulWidget {
     @required CameraPickerViewType pickerType,
     @required XFile previewXFile,
     @required ThemeData theme,
+    bool shouldDeletePreviewFile = false,
   }) async {
     try {
       final Widget viewer = CameraPickerViewer(
         pickerState: pickerState,
         pickerType: pickerType,
         previewXFile: previewXFile,
         theme: theme,
+        shouldDeletePreviewFile: shouldDeletePreviewFile,
       );
       final PageRouteBuilder<AssetEntity> pageRoute =
           PageRouteBuilder<AssetEntity>(
@@ -106,6 +115,8 @@ class _CameraPickerViewerState extends State<CameraPickerViewer> {
 
   ThemeData get theme => widget.theme;
 
+  bool get shouldDeletePreviewFile => widget.shouldDeletePreviewFile;
+
   /* End of widget getter */
 
   /// Controller for the video player.
@@ -216,14 +227,8 @@ class _CameraPickerViewerState extends State<CameraPickerViewer> {
       }
 
       saveFuture.then((AssetEntity entity) {
-        if (Platform.isAndroid) {
-          if (!DeviceUtils.isLowerThanAndroidQ && previewFile.existsSync()) {
-            previewFile.delete();
-          }
-        } else {
-          if (previewFile.existsSync()) {
-            previewFile.delete();
-          }
+        if (shouldDeletePreviewFile && previewFile.existsSync()) {
+          previewFile.delete();
         }
         Navigator.of(context).pop(entity);
       });