int waitForUSBPermission() {
UsbManager manager = (UsbManager) getSystemService(Context.USB_SERVICE);
if (usbListener == null) return -1;
while (!usbListener.permissionGranted()) {
SystemClock.sleep(100);
}
UsbDevice depthCamera = usbListener.getDevice();
UsbDeviceConnection con = manager.openDevice(depthCamera);
return con.getFileDescriptor();
}
// return true if a device is found
boolean askForUSBPermission() {
UsbManager manager = (UsbManager) getSystemService(Context.USB_SERVICE);
// register someone to listen for "permission granted" dialogs
PendingIntent permissionIntent =
PendingIntent.getBroadcast(this, 0, new Intent(ACTION_USB_PERMISSION), 0);
IntentFilter filter = new IntentFilter(ACTION_USB_PERMISSION);
usbListener = new InfiniTAMUSBPermissionListener();
registerReceiver(usbListener, filter);
// get a ist of USB devices
HashMap<String, UsbDevice> deviceList = manager.getDeviceList();
Iterator<UsbDevice> deviceIterator = deviceList.values().iterator();
// find the depth camera
UsbDevice depthCamera = null;
while (deviceIterator.hasNext()) {
UsbDevice device = deviceIterator.next();
if ((device.getVendorId() == 0x1d27) && (device.getProductId() == 0x0600)) {
depthCamera = device;
}
}
if (depthCamera == null) {
usbListener = null;
return false;
}
if (manager.hasPermission(depthCamera)) {
usbListener.setDeviceWithPermission(depthCamera);
} else {
manager.requestPermission(depthCamera, permissionIntent);
}
return true;
}