README.md
1# USB management
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3### Introduction
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5This example demonstrates the use of USB device management, including USB device insertion and removal status monitoring and USB device information display. The results are as follows:
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9# Related Conceptions
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111. [Subscribe to USB Listening Events](https://gitee.com/openharmony/docs/blob/master/zh-cn/application-dev/reference/apis/js-apis-commonEvent.md#commoneventcreatesubscriber) : Obtain the interface usage status by subscribing to the USB insertion and removal listening events.
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132. [Get USB Device List](https://gitee.com/openharmony/docs/blob/master/zh-cn/application-dev/reference/apis/js-apis-usb.md#usbgetdevices): Gets the list of plugged in USB devices.
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15### Related permissions
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17Not involved
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19### Usage
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211. Open the **USB Listening** switch, and the interface pops up the prompt of "Start Listening...".
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232. Plug in the device, the interface will have a "USB plugged in" prompt, the device list will show the plugged in device. If the list is not updated in time, you can manually refresh the drop-down list.
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253. Click on the device, the pop-up box will display the specific information of the USB device, click the **OK** button to return to the main page.
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274. Unplug the USB device, the interface will have a "removed device" prompt, and the device list will remove the device model. If the list is not updated in time, you can manually refresh the drop-down list.
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29### Constraints and Restrictions
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311. This sample is only supported to run on standard systems.
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332. This sample requires DevEco Studio 3.0 Beta4 (Build Version: 3.0.0.992, built on July 14, 2022) to compile and run.
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README_zh.md
1# USB管理
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3### 简介
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5本示例展示了USB设备管理的使用，包括USB设备插拔状态监听和USB设备信息显示。实现效果如下：
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9### 相关概念
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11USB管理：本模块可以对USB设备进行监听和信息读取。
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13### 相关权限
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15不涉及。
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17### 使用说明
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191.打开**USB监听**开关，界面弹出"开始监听..."的提示（USB监听开关仅监听设备是否插入并弹窗进行提示）。
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212.插入设备，界面会有“USB已插入”的提示,设备列表会显示已插入设备的名称。如果列表没有及时更新，则可以下拉列表手动刷新。
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233.点击设备，弹框会显示该USB设备的具体信息，点击**确定**按钮返回主页面。
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254.将USB设备拔出，界面会有“已移除设备”的提示，设备列表会移除该名称的设备。如果列表没有及时更新，则可以下拉列表手动刷新。
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27### 约束与限制
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291.本示例仅支持在标准系统上运行。
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312.本示例需要使用DevEco Studio 3.0 Beta4 (Build Version： 3.0.0.992， built on July 14， 2022)才可编译运行。
