Auto-focus can't be triggered on a tablet which supports auto-focus function

[weishiny]

Hi, I have an auto-focus issue on a tablet(Asus ZenPad C7.0 Z170C, Android 5.0), I found that this

plugin and most of app on Play Store can't trigger the auto-focus function so that I cannot scan the

barcode for this tablet, only ZXing barcode scanner can work perfectly, I've confirmed that the tablet's

camera supports auto-focus function, does anyone know why this plugin using ZXing library can't trigger

auto-focus function like ZXing barcode scanner App? is it a tablet hardware problem or OS Version

problem?

Thanks!