質問

How can I use UsbManager class in Android API level 1? I'll try the code below but I can not reach UsbManager.

IntentFilter deviceAttachedFilter = new IntentFilter();
deviceAttachedFilter.addAction(UsbManager.ACTION_USB_DEVICE_ATTACHED);
deviceAttachedFilter.addAction(UsbManager.ACTION_USB_DEVICE_DETACHED);
registerReceiver(mUsbReceiver, deviceAttachedFilter);
役に立ちましたか?

解決

As stated in the official Documentation, UsbManager was introduced with API level 12.

There is no way to use it on previous platform versions. It runs as a system service, and those cannot be easily backported.

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