2019-08-06 17:21:24.887 28220-28243/com.serenegiant.usbcameratest0 E/AndroidRuntime: FATAL EXCEPTION: USBMonitor
Process: com.serenegiant.usbcameratest0, PID: 28220
java.lang.NullPointerException: Attempt to invoke virtual method 'byte[] android.hardware.usb.UsbDeviceConnection.getRawDescriptors()' on a null object reference
at com.serenegiant.usb.USBMonitor.updateDeviceInfo(USBMonitor.java:900)
at com.serenegiant.usb.USBMonitor$UsbControlBlock.<init>(USBMonitor.java:974)
at com.serenegiant.usb.USBMonitor$UsbControlBlock.<init>(USBMonitor.java:955)
at com.serenegiant.usb.USBMonitor$3.run(USBMonitor.java:563)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:193)
at android.os.HandlerThread.run(HandlerThread.java:65)
Device USB Camera Info: "Corp. USB 2.0 HD Camera, productId: 17688, vendorId:1449"
Device USB Camera Info: "Corp. USB 2.0 HD Camera, productId: 17688, vendorId:1449"