如何解决 android futronic 指纹扫描仪演示上的错误 1450？

Question

Don't know if this the right place to ask this question but desperately need all the help I can get.

I have an android device with integrated Futronic fingerprint scanner. I have been able to communicate with the scanner and gain access to it using the usb host mode.

I have the below log on the Logcat showing am able to communicate with the scanner

I/FUTRONICFTR_J: Open device: UsbDevice[mName=/dev/bus/usb/001/054,mVendorId=5265,mProductId=32,mClass=0,mSubclass=0,mProtocol=0,mManufacturerName=Futronic Technology Company Ltd.,mProductName=Futronic Fingerprint Scanner 2.0,mVersion=2.0,mSerialNumber=FS00212726,mConfigurations=[
UsbConfiguration[mId=1,mName=null,mAttributes=128,mMaxPower=75,mInterfaces=[
UsbInterface[mId=0,mAlternateSetting=0,mName=null,mClass=255,mSubclass=0,mProtocol=0,mEndpoints=[
UsbEndpoint[mAddress=1,mAttributes=2,mMaxPacketSize=512,mInterval=0]
UsbEndpoint[mAddress=130,mAttributes=2,mMaxPacketSize=512,mInterval=0]]]]

But when i try to capture, i get 1450 error code coming from the.so libs. The error happened after calling this code in the AnsiLibSDK class

public native boolean OpenDeviceCtx(final Object object);

While I have all the.so files in my jinLib folder

Answer 1

The Shared Libraries .so files need access to the storage. Storage Permission must be granted to the app for it to work.

Granted Permission and the error goes away!