fix pickCamera parameter default & update readme

README.md

 # photo
 
-[![pub package](https://img.shields.io/pub/v/photo.svg)](https://pub.dartlang.org/packages/photo)
-[![GitHub](https://img.shields.io/github/license/CaiJingLong/flutter_photo.svg?style=flat-square)](https://github.com/CaiJingLong/flutter_photo)
-[![GitHub stars](https://img.shields.io/github/stars/CaiJingLong/flutter_photo.svg?style=social&label=Stars)](https://github.com/CaiJingLong/flutter_photo)
-
 image picker, multi picker
 
 support ios icloud
 
 support video
 
+support camera
+
 use flutter as ui
 
 if you want to build custom ui, you just need api to make custom ui. to use [photo_manager](https://github.com/CaiJingLong/flutter_photo_manager) or fork the library to custom ui.
 
-## Screenshot
-
-![image](https://github.com/CaiJingLong/some_asset/blob/master/image_picker1.gif)
-
 ## install
 
-latest version : [![pub package](https://img.shields.io/pub/v/photo.svg)](https://pub.dartlang.org/packages/photo)
-
 ```yaml
 dependencies:
-  photo: $latest_version
+  photo: 
+    git: 
+      url: https://git.links123.net/lucky1213/mutli_image_picker.git
 ```
 
 ## Import
 import 'package:photo_manager/photo_manager.dart';
 ```
 
-## Usage
+## Usage 从相册选择
 
-### Simple use
+### 简单示例
 
 ```dart
 void pickAssets() async {
-    List<AssetEntity> assetList = await PhotoPicker.pickAsset(context: context);
-    /// Use assetList to do something.
+  PickedEntity result = await PhotoPicker.pickAsset(
+    context: context, 
+    provider: locale,
+    type: PickType.onlyImage,
+  );
+  /// Use assetList to do something.
 }
 ```
 
-### More option
+### 更多的参数
 
 The context is required, other params is optional.
 
 ```dart
 void pickAsset() async {
-    List<AssetEntity> imgList = await PhotoPicker.pickAsset(
-      context: context,
-      // BuildContext requied
-
-      /// The following are optional parameters.
-      themeColor: Colors.green,
-      // the title color and bottom color
-      padding: 1.0,
-      // item padding
-      dividerColor: Colors.grey,
-      // divider color
-      disableColor: Colors.grey.shade300,
-      // the check box disable color
-      itemRadio: 0.88,
-      // the content item radio
-      maxSelected: 8,
-      // max picker image count
-      provider: I18nProvider.chinese,
-      // i18n provider ,default is chinese. , you can custom I18nProvider or use ENProvider()
-      rowCount: 5,
-      // item row count
-      textColor: Colors.white,
-      // text color
-      thumbSize: 150,
-      // preview thumb size , default is 64
-      sortDelegate: SortDelegate.common,
-      // default is common ,or you make custom delegate to sort your gallery
-      checkBoxBuilderDelegate: DefaultCheckBoxBuilderDelegate(
-        activeColor: Colors.white,
-        unselectedColor: Colors.white,
-        checkColor: Colors.blue,
-      ), // default is DefaultCheckBoxBuilderDelegate ,or you make custom delegate to create checkbox
-
-      loadingDelegate:
-          this, // if you want to build custom loading widget,extends LoadingDelegate [see example/lib/main.dart]
-
-      badgeDelegate: const DefaultBadgeDelegate(), /// or custom class extends [BadgeDelegate]
-
-      pickType: type, // all/image/video
-
-      List<AssetPathEntity> photoPathList, /// when [photoPathList] is not null , [pickType] invalid .
-    );
+  PickedEntity result = await PhotoPicker.pickAsset(
+    // BuildContext requied
+    context: context,
+    // item row count
+    rowCount: 4,
+    // item radio
+    itemRadio: 1,
+    // max picker image count
+    maxSelected: 8,
+    // item padding
+    padding: 1,
+    // i18n provider ,default is chinese. , you can custom I18nProvider or use ENProvider()
+    provider: I18nProvider.chinese,
+    // preview thumb size , default is 128
+    thumbSize: 150,
+    // theme, 默认使用MaterialApp定义的theme
+    theme: PhotoTheme(),
+    // default is common ,or you make custom delegate to sort your gallery
+    sortDelegate: SortDelegate.common,
+    // if you want to build custom loading widget,extends LoadingDelegate [see example/lib/main.dart]
+    loadingDelegate: DefaultLoadingDelegate(), 
+    // all/image/video
+    pickType: type, 
+    // 可以理解为相册文件夹 when [photoPathList] is not null , [pickType] invalid .
+    List<AssetPathEntity> photoPathList, 
+    //  已选择的asset
+    List<AssetEntity> pickedAssetList 
+  );
+```
+
+## Usage 使用相机
+
+```dart
+void pickCamera() async {
+  // 参数来源自 ImagePicker.pickImage
+  File result = await PhotoPicker.pickCamera(
+    maxWidth: 100, 
+    maxHeight: 100,
+    imageQuality: 100,
+    preferredCameraDevice: CameraDevice.rear,
+  );
+}
+```
+
+
+### 关于`PickedEntity`
+
+```dart
+// 选中的assets 取消/默认 是空数组
+List<AssetEntity> asset
+
+// 是否是原图 默认 false
+bool isFullImage
 ```
 
 ### About photoPathList params
 
 This parameter is then passed into the `pickAsset` method, where the incoming photoList is rendered instead of the data in the album.
 
-## Whole example
-
-You can see [github](https://github.com/caijinglong/flutter_photo/blob/master/example/) [main.dart](https://github.com/caijinglong/flutter_photo/blob/master/example/lib/main.dart)
-
 ## About android
 
 ### Migrate to androidX
 <string>App need your agree, can visit your album</string>
 ```
 
-xcode like image
-![in xcode](https://github.com/CaiJingLong/some_asset/blob/master/flutter_photo2.png)
-
 ### Build error
 
 if you build error like include of non-modular header inside framework module, see [#10](https://github.com/CaiJingLong/flutter_photo/issues/10) or [so](https://stackoverflow.com/questions/27776497/include-of-non-modular-header-inside-framework-module)
-
-## Thanks
-
-Part of the Android code comes from [debuggerx01](https://github.com/debuggerx01).
-
-## Donate
-
-If my code helps you, and you're willing to buy me a cup of coffee.
-
-you can use [paypal](https://paypal.me/caijinglong)
-
-or scan my alipay
-
-<img width="200px"  src="https://raw.githubusercontent.com/CaiJingLong/asset_for_picgo/master/20181228213953.png"/>

example/ios/Flutter/.last_build_id

-e66d98e32fcb326d739aa957c5133ebc
+894f424b8531a69bd75214bc0c525b8a

example/lib/main.dart

                 text: "all",
                 onTap: () => _pickAsset(PickType.all),
               ),
+              IconTextButton(
+                icon: Icons.camera,
+                text: "camera",
+                onTap: () {
+                  PhotoPicker.pickCamera();
+                },
+              ),
               IconTextButton(
                 icon: CupertinoIcons.reply_all,
                 text: "Picked asset example.",

lib/photo.dart

 export 'package:photo/src/entity/options.dart' show PickType, PickedEntity;
 export 'package:photo/src/delegate/badge_delegate.dart';
 export 'package:photo/src/entity/_theme.dart';
+export 'package:image_picker/image_picker.dart' show CameraDevice;
 
 class PhotoPicker {
   static PhotoPicker _instance;
 
   /// 没有授予权限的时候,会开启一个dialog去帮助用户去应用设置页面开启权限
   /// 确定开启设置页面,取消关闭弹窗,无论选择什么,返回值都是null
-  ///
-  ///
   /// 当用户给予权限后
   ///
-  ///   当用户确定时,返回一个图片[AssetEntity]列表
+  /// 返回一个[PickedEntity] 内有[AssetEntity]以及[isFullImage]
   ///
-  ///   当用户取消时返回一个空数组
+  /// 当用户取消时[AssetEntity]返回一个空数组
   ///
-  ///   [photoPathList] 一旦设置 则 [pickType]参数无效
+  /// [photoPathList] 一旦设置 则 [pickType]参数无效
   ///
-  ///   [pickedAssetList] 已选择的asset
+  /// [pickedAssetList] 已选择的asset
   ///
   /// 关于参数可以查看readme文档介绍
-  ///
-  /// if user not grand permission, then return null and show a dialog to help user open setting.
-  /// sure is open setting cancel ,cancel to dismiss dialog, return null
-  ///
-  /// when user give permission.
-  ///
-  ///   when user sure , return a [AssetEntity] of [List]
-  ///
-  ///   when user cancel selected,result is empty list
-  ///
-  ///   when [photoPathList] is not null , [pickType] invalid
-  ///
-  ///   [pickedAssetList]: The results of the last selection can be passed in for easy secondary selection.
-  ///
-  /// params see readme.md
   static Future<PickedEntity> pickAsset({
     @required BuildContext context,
     int rowCount = 4,
     double maxWidth,
     double maxHeight,
     int imageQuality,
-    CameraDevice preferredCameraDevice,
+    CameraDevice preferredCameraDevice = CameraDevice.rear,
   }) async {
     return ImagePicker.pickImage(
       source: ImageSource.camera,