/******************************************************************************
* Android虚拟、实体键盘不能同时使用？
* 说明：
* 当Android系统中插入了键盘之后，虚拟键盘将不能被使用。
*
* 2017-6-29 深圳 龙华樟坑村 曾剑锋
*****************************************************************************/
一、参考文档：
1. How to enable both hardware and virtual keyboards on Android ice cream sandwich
https://stackoverflow.com/questions/10561760/how-to-enable-both-hardware-and-virtual-keyboards-on-android-ice-cream-sandwich
二、解决方法：
The barcode scanner is detected as a Physical Keyboard. When a keyboard is connected to the device, by default the soft keyboard is disabled. To enable it, we need to turn OFF hardware keyboard via:
Settings > Language & Input > Select Input Method
The option name may differ from device to device. We will be able to use the scanner along with the soft keyboard even though we turn it OFF.
