2024年4月8日发(作者：)

android mtp原理

英文回答：

Android MTP (Media Transfer Protocol) is a

communication protocol that allows the transfer of media

files between an Android device and a computer. It is

commonly used when connecting an Android device to a

computer via USB. MTP is supported by most modern Android

devices and is an alternative to the traditional USB Mass

Storage mode.

The MTP protocol works by establishing a connection

between the Android device and the computer. Once connected,

the Android device acts as a MTP device, while the computer

acts as a MTP host. The MTP host sends commands to the MTP

device to perform various operations such as listing files,

transferring files, creating folders, and deleting files.

When a user connects their Android device to a computer,

the MTP host sends a command to the MTP device to retrieve

the list of files and folders on the device. The MTP device

responds by sending the file and folder information to the

host. The host can then display this information to the

user, allowing them to browse and manage the files on the

Android device.

To transfer files between the Android device and the

computer, the MTP host sends a command to the MTP device to

initiate the transfer. The MTP device then sends the file

data to the host, which writes it to the computer's storage.

Similarly, when the user wants to copy files from the

computer to the Android device, the host sends the file

data to the device, which writes it to its storage.

One advantage of using MTP over USB Mass Storage is

that the Android device can still access its storage while

connected to the computer. In USB Mass Storage mode, the

device's storage is mounted as a separate drive on the

computer, preventing the device from accessing its own

files. With MTP, the Android device can continue to use its

storage for other tasks while transferring files.

中文回答：

Android MTP（媒体传输协议）是一种通信协议，允许在

Android设备和计算机之间传输媒体文件。当通过USB将Android

设备连接到计算机时，通常使用MTP。大多数现代Android设备都

支持MTP，并且它是传统的USB大容量存储模式的替代方案。

MTP协议通过建立Android设备和计算机之间的连接来工作。

一旦连接成功，Android设备充当MTP设备，而计算机充当MTP主

机。MTP主机发送命令给MTP设备执行各种操作，如列出文件、传

输文件、创建文件夹和删除文件。

当用户将其Android设备连接到计算机时，MTP主机发送命令

给MTP设备以检索设备上的文件和文件夹列表。MTP设备通过将文

件和文件夹信息发送给主机来响应。主机可以将此信息显示给用户，

使其可以浏览和管理Android设备上的文件。

要在Android设备和计算机之间传输文件，MTP主机发送命令

给MTP设备以启动传输。然后，MTP设备将文件数据发送给主机，

主机将其写入计算机的存储。类似地，当用户想要将文件从计算机

复制到Android设备时，主机将文件数据发送给设备，设备将其写

入其存储。

使用MTP而不是USB大容量存储的一个优点是，在连接到计算

机时，Android设备仍然可以访问其存储。在USB大容量存储模式

下，设备的存储作为计算机上的单独驱动器挂载，阻止设备访问自

己的文件。使用MTP时，Android设备可以在传输文件的同时继续

使用其存储进行其他任务。