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Questions tagged [usbmanager]

9 questions
4
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1 answer

UsbDevice requestPermission is denied without showing the request dialog prompt

I'm trying to use usb camera devices connected to my android device. So initially i have got the details of the usb devices connected through UsbManager.getDeviceList() method. Then i iterated through every device and requested for permission if…
manish reddy
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Android Emulator (Android Studio AVD) Serial Port Connection - Empty Device List

I'm trying to use the emulator that comes with Android Studio to open a serial port to talk to an Arduino board on COM5; however, I am having trouble even seeing a device list. I am using the package by felHR85 GitHub link for the USB serial…
Liam G
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Android procedurally change Gadget Mode

Is there a way of selecting the gadget mode from an android app, specifically for when connecting to hosts? I.e. Can I request the host OS goes into RNDIS mode? Or UsbManager.USB_FUNCTION_MIDI? I can't seem to find any way in documentation for…
Charles Lohr
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¿How can i receive Status from a thermal printer with Android managerUsb?

The printer uses USB connection and ESC/POS commands, I can send commands with BulkTransfer: val usbManager = context.getSystemService(Context.USB_SERVICE) as UsbManager val device: UsbDevice? = …
Dani Puente
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usbManager is behaving abnormally for targeting S+ (android api level 31 and above)

I am working on an app which connect Nikon D3200 camera using usbManager. After connection establishment phone can see liveView on phone and can capture a photo using phone. This app works fine with targetSdkVersion 28 and compileSdkVersion 28, but…
Mdohammad Sajib Al Seraj
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1 answer

Why does Android not see a connected computer as either a USB Device or USB Accessory

I'm trying to gain a deeper understanding of the Android USB APIs. I have played with the USB Host APIs and have successfully connected various devices (USB stick, USB hub with other devices attached) to my Android phone (Phone as host). I…
Yirmi
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Could not connect to device: NullPointerException connecting from android to Zebra printer via USB?

am trying to connect to a Zebra Printer, model ZDesigner GK420t, from an Android Application via USB using the new UsbConnection(), where the parameters assigned to USBConnection() constructor are as follows: UsbManager manager =…
Yazan
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How to get list of usb devices connected from a service

I am writing a service which would send some proprietary commands to a specific USB device connected to Android based box. Earlier I had implemented an app (with Activity) so it was pretty straightforward: UsbManager manager = (UsbManager)…
Sabin
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Get UUID of a USB Mass Storage Device connected to an Android device

I have been going though the Android documentation searching for a way to identify a USB device (mass storage device or other) by its UUID, but I don't find one. I looked at: UsbDevice Docs UsbManager Docs USB Dev guide Non of these provide a…
CybeX
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