我正在使用一个android应用程序，该应用程序需要检查设备是否通过usb连接到另一个系统或pendrive，如果设备已连接，我需要通过usb端口发送数据库文件的副本。这是用于备份数据库的。我不知道如何提示usb连接。我搜了一下网。但没有结果！。有人能帮忙吗。因为我一直在做我的项目。
提前谢谢。
并非所有设备都有支持主机模式的USB硬件，Android API也不支持这样使用。
您最好的选择是将要传输的文件写入外部存储，并在连接设备时让主机定位并复制它们。
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