diff --git "a/ohos/docs/Flutter OHOS\345\244\226\346\216\245\347\272\271\347\220\206\351\200\202\351\205\215\347\256\200\344\273\213.md" "b/ohos/docs/Flutter OHOS\345\244\226\346\216\245\347\272\271\347\220\206\351\200\202\351\205\215\347\256\200\344\273\213.md"
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--- /dev/null
+++ "b/ohos/docs/Flutter OHOS\345\244\226\346\216\245\347\272\271\347\220\206\351\200\202\351\205\215\347\256\200\344\273\213.md"	
@@ -0,0 +1,92 @@
+Flutter OHOS外接纹理适配简介
+
+Flutter在OHOS平台使用外接纹理，视频播放和相机预览使用方法是一致的，在注册纹理时，flutter engine返回surfaceId。图片场景，则是以PixelMap的形式注册到flutter engine。
+
+注：一般而言，为了方便复用，会将ohos对接flutter外接纹理的功能代码作为一个module模块组件单独写一个插件注册到Flutter engine，见视频播放的demo中的<https://gitee.com/openharmony-sig/flutter_packages/tree/master/packages/video_player/video_player_ohos/ohos>。
+
+# 相机预览
+
+## Demo地址
+
+<https://gitee.com/openharmony-sig/flutter_samples/tree/master/ohos/testcamera>
+
+## 实现说明
+
+1． 实现插件，在onAttachedToEngine中，从入参FlutterPluginBinding中获取TextureRegistry
+
+![](media/dc15b84a4b97ec7f923ffefe121bd346.png)
+
+2． 在onMethodCall中实现注册纹理的响应方法
+
+![](media/3f7a2a6befa3459f00a90b6e796839e4.png)
+
+registerCameraTexture中实现注册纹理，先获取textureId，再使用该textureId去注册纹理到flutter engine，返回surfaceId。
+
+![](media/7ea99353820d6640826bf0bd24dd5f8b.png)
+
+3． 在启动相机预览中，使用前面获取到的surfaceId。
+
+![](media/614df503f2164dd4e4a4b4a5e5bc9c87.png)
+
+4 . dart侧通过MethodChannel触发，触发纹理注册和启动相机预览。
+
+![](media/62bbfe62e6fecbb269ab9f607fb2cfbf.png)
+
+预览画面使用获取到的textureId构造一个texture widget。
+
+![](media/37b3118e6921ff70b1baf4234fcdaa69.png)
+
+# 视频播放
+
+## Demo地址
+
+<https://gitee.com/openharmony-sig/flutter_packages/tree/master/packages/video_player/video_player_ohos/example>
+
+## 实现说明
+
+视频播放和相机预览使用纹理方式完全一致，简述如下：
+
+1.  在video_player_ohos插件中实现ohos原生播放器：AVplayer。可参考https://docs.openharmony.cn/pages/v4.0/zh-cn/application-dev/media/using-avplayer-for-playback.md/
+2.  同样实现插件，在onAttachedToEngine中，从入参FlutterPluginBinding中获取TextureRegistry（此处放入FlutterState中封装）。
+
+    ![](media/50312d42df3346723abf740064ea019b.png)
+
+3.  在创建视频播放器的方法中，（先从FlutterState拿出TextureRegistry）同样的先获取textureId，再注册纹理到engine，得到surfaceId（surfaceId在返回的SurfaceTextureEntry对象中）：
+
+    ![](media/e68f5cbb2f98dca205bf51d6ab53ad09.png)
+
+4.  Videoplaye构造方法中取出surfaceId：
+
+    ![](media/d7e3f8d50d8970578c1bfc9bdcb1941c.png)
+
+5.  在AVplayer是AvplayerStatus.INITIALIZED状态时，把surfaceId赋给AVplayer
+
+![](media/7f03e4b85c4434de763faf2b3d073a6d.png)
+
+1.  第三步创建AVplayer时，需要把textureId返回给dart层，dart层得到该值，可以在texture Widget中使用该外接纹理完成渲染。
+
+# 图片显示
+
+## Demo地址
+
+<https://gitee.com/openharmony-sig/flutter_samples/tree/master/ohos/testpicture>
+
+## 使用说明
+
+图片外接纹理，不需要使用surfaceId, 而是以PixelMap的形式注册到flutter engine。
+
+1.  同样实现插件，在onAttachedToEngine中，从入参FlutterPluginBinding中获取TextureRegistry。
+
+    ![](media/975272fd1c19bb2371545f5d011284bd.png)
+
+2.  在onMethodCall中实现注册纹理的响应方法
+
+    ![](media/ff662b72b643008d3ba214eb3632452e.png)
+
+3.  注册纹理实现方法中，把图片数据读进来，创建ImageSource，再创建PixelMap对象，使用registerPixelMap接口注册纹理到flutter engine，得到textureId返回给dart层。
+
+    ![](media/44c0e7494d3916a7b760fc4ed4cd9668.png)
+
+4.  dart层得到该值，可以在texture Widget中使用该外接纹理完成渲染。
+
+    ![](media/8eff1f85dd7c64952444faf2de19ff89.png)
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diff --git a/ohos/testcamera/ohos/entry/src/ohosTest/ets/test/Ability.test.ets b/ohos/testcamera/ohos/entry/src/ohosTest/ets/test/Ability.test.ets
index 741f7eb8513f725019f3278db6c0467c5e4f27c8..25d4c71ff3cd584f5d64f6f8c0ac864928c234c4 100644
--- a/ohos/testcamera/ohos/entry/src/ohosTest/ets/test/Ability.test.ets
+++ b/ohos/testcamera/ohos/entry/src/ohosTest/ets/test/Ability.test.ets
@@ -20,7 +20,7 @@ export default function abilityTest() {
   describe('ActsAbilityTest', function () {
     // Defines a test suite. Two parameters are supported: test suite name and test suite function.
     beforeAll(function () {
-      // Presets an action, which is performed only once before all test cases of the test suite start .
+      // Presets an action, which is performed only once before all test cases of the test suite start.
       // This API supports only one parameter: preset action function.
     })
     beforeEach(function () {