How To Use An External Camera With Camera2 API?
на канале: Global Insights 24
How To Use An External Camera With Camera2 API?
1. Prepare External Camera Setup - Ensure Android device supports USB host mode before connecting external camera hardware, Verify external camera is UVC compliant and requires no special driver installation, Add proper CAMERA and USB permissions in the application manifest for access.
2. Detect And Open Camera - Use UsbManager to detect attached USB devices and confirm correct vendor IDs, Retrieve available cameras using CameraManager getCameraIdList for internal and external devices, Call openCamera with a state callback to manage opening and error events.
3. Configure Capture And Preview - Create a CaptureRequest and set up a CameraCaptureSession for image streaming, Use TextureView, SurfaceView, or ImageReader as the preview Surface for display, Control focus, exposure, and white balance through Camera2 API manual settings.
4. Handle Resources And Testing - Always close sessions and camera devices properly to avoid memory leaks, Manage threading carefully since Camera2 callbacks often run on background threads, Test across multiple Android devices as external camera handling can vary.
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