📝 Add description for displaying selected assets.

Author: AlexV525

README-ZH.md

@@ -29,6 +29,7 @@ Language: [English](README.md) | 中文简体
 * [使用方法](#使用方法-)
   * [简单的使用方法](#简单的使用方法)
   * [完整参数的使用方法](#完整参数的使用方法)
+  * [展示选中的资源](#展示选中的资源)
   * [注册资源变化回调](#注册资源变化回调)
 * [类介绍](#类介绍-)
   * [`AssetEntity`](#assetentity)
@@ -179,6 +180,16 @@ AssetPicker.pickAsset(context).then((List<AssetEntity> assets) {
 
 欲了解各种选择器模式，请直接运行 example 查看。
 
+### 展示选中的资源
+
+`AssetEntityImageProvider` 可以为 **图片 & 视频** 展示缩略图，以及展示 **图片的原图**。它的使用方法与常见的 `ImageProvider` 一致。
+
+```dart
+Image(image: AssetEntityImageProvider(asset, isOriginal: false))
+```
+
+请查看示例以了解它如何进行展示。
+
 ### 注册资源变化回调
 ```dart
 AssetPicker.registerObserve(); // 注册回调

README.md

@@ -50,6 +50,7 @@ This project follows the [all-contributors](https://github.com/all-contributors/
 * [Usage](#usage-)
   * [Simple usage](#simple-usage)
   * [Complete param usage](#complete-param-usage)
+  * [Display selected assets](#display-selected-assets)
   * [Register assets change observe callback](#register-assets-change-observe-callback)
 * [Classes Introduction](#classes-introduction-)
   * [`AssetEntity`](#assetentity)
@@ -89,7 +90,7 @@ See [Migration Guide](doc/migration_guide.md).
 
 ## READ THIS FIRST ‼️
 
-Althought the package provide selection for assets, it still require users build their own methods to handle display/upload, etc. If you have any question about how to build it, please run the example or refer to [photo_manager](https://github.com/CaiJingLong/flutter_photo_manager) for API usage.
+Althought the package provide selection for assets, it still require users build their own methods to handle upload, image compress, etc. If you have any question about how to build it, please run the example or refer to [photo_manager](https://github.com/CaiJingLong/flutter_photo_manager) for API usage.
 
 ## Preparing for use 🍭
 
@@ -200,6 +201,16 @@ AssetPicker.pickAsset(context).then((List<AssetEntity> assets) {
 
 For various type of the picker, head over to the example and run it with no doubt.
 
+### Display selected assets
+
+The `AssetEntityImageProvider` can display the thumb image of _images & videos_, and the original data of _image_. Use it like a common `ImageProvider`.
+
+```dart
+Image(image: AssetEntityImageProvider(asset, isOriginal: false))
+```
+
+Check the example for how it displays.
+
 ### Register assets change observe callback
 ```dart
 AssetPicker.registerObserve(); // Register callback.