如何检测Honeycomb中的MTP/PTP设备？
我想在插入 Android 设备时检测 MTP/PTP 设备。我知道有一种使用 Intent 的方法： android.hardware.usb.action.USB_DEVICE_ATTACHED 然后使用
因此，有人知道该怎么做吗？
I want to detect the MTP/PTP device when it plugs in the android device. I know there is one method using Intent: android.hardware.usb.action.USB_DEVICE_ATTACHED and then defining meta-data which using resource like <usb-device class="6" subclass="1" protocol="1">, but it doesn't work. The system doesn't send this intent to the registered application.
Thus, does anyone know how to do it?
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您是否通过添加 进入
AndroidManifest.xml：
Have you set the machine to act as USB host by adding into
AndroidManifest.xml:
您能具体说明您用于测试的设备是什么吗？
您的设备很可能在 USB 设备描述符和/或接口描述符的类、子类和协议中没有 PTP/MTP 特定值。
请参阅：http://events.linuxfoundation.org/站点/事件/文件/幻灯片/Media%20Transfer%20Protocol.pdf
某些设备将自己宣传为大容量存储设备或特定于供应商的设备。
如果是这种情况，唯一的方法是尝试匹配您想要支持的设备的供应商 ID 和产品 ID。
这里还有一个 MTP 设备列表及其供应商 ID 和产品 ID： http://sourceforge.net/p/libmtp/code/ci/HEAD/tree/src/music-players.h。
希望这有帮助。
could you please specify what is the device you are using for testing?
It is very likely that your device has no PTP/MTP specific values in class, subclass and protocol for the USB device descriptor and/or interface descriptor.
See this: http://events.linuxfoundation.org/sites/events/files/slides/Media%20Transfer%20Protocol.pdf
Some devices advertise themselves as Mass Storage devices or Vendor Specific.
If that is the case the only way is to try matching the vendor id and product id of the devices you would like to support.
Here is also a list of MTP devices with their vendor id and product id: http://sourceforge.net/p/libmtp/code/ci/HEAD/tree/src/music-players.h.
Hope this helps.