Think of your development machine (the host) and the Android Emulator (the guest). By default, the guest lives in a sandbox, completely isolated from the host's physical connections. "USB Passthrough" is the process of bypassing this isolation. It hands over control of a specific physical USB port (and the device plugged into it) from your host operating system directly to the guest virtual machine.
Open your terminal or command prompt inside the emulator directory. List your available virtual devices using: emulator -list-avds Use code with caution.
No single solution works perfectly for every USB device and emulator combination. Your best approach depends on your specific requirements:
./emulator -avd Pixel_7_Pro -qemu -device usb-host,vendorid=0x0403,productid=0x6001 Use code with caution.
: The current user doesn't have system permission to access raw read/write blocks on the /dev/bus/usb/ nodes. connect usb device to android emulator better
As Genymotion‘s official support documentation warns: “It is possible to connect a USB device to Genymotion virtual devices via VirtualBox but we don‘t guarantee it will work, because the USB device has to be supported by the Linux kernel of Genymotion. Otherwise, it won‘t be detected”. Additionally, “This method is only available with VirtualBox hypervisor. It is not doable on Apple Mac M series computers”.
USB passthrough performance varies dramatically based on your approach. ADB over USB typically achieves “normal USB speed,” while emulators often transfer data “through TCP/IP” with lower throughput and higher latency.
, add a filter for your device, and it will be captured by the Android OS immediately upon plugging it in. Stack Overflow 3. Native Testing: Physical Device (Recommended)
Connecting physical USB devices to an Android emulator is a critical workflow for developers testing hardware integrations like biometrics, thermal printers, smart cards, or custom IoT peripherals. Because standard Android Virtual Devices (AVDs) run in an isolated quick-boot environment, they do not automatically detect your computer's hardware ports. Think of your development machine (the host) and
If your host computer (especially Windows) grabs the USB device and locks it with a local driver, the emulator will fail to claim the interface. You may need to use a tool like on Windows to swap the device's driver over to a generic WinUSB target. This frees the device from the host OS control, allowing it to pass completely into your Android development environment.
: Create a custom udev rule under /etc/udev/rules.d/ matching your device's Vendor ID to automatically grant MODE="0666" permissions to your user group.
Or better, run your emulator script with sudo .
This method generally requires an x86-based emulator image. ARM images often lack the necessary virtual USB controllers to support host passthrough. It hands over control of a specific physical
Closing tips
And Maya’s sensor? It blinked green. Steady as a heartbeat.
Connecting a physical USB device (like a sensor, controller, or specialized dongle) to an Android Emulator requires USB Passthrough
Launch your chosen AVD (e.g., Pixel_7_Pro ) by appending the QEMU USB passthrough arguments:
