BLE Central,Peripheral Check

如果蓝牙经典，BLE中央和BLE外设模式支持检查

Note: A new more advanced BLE app in which users are able to connect to single/multiple BLE devices at the same time has been completed and is open source:

https://play.google.com/store/apps/details?id=com.kyriakosalexandrou.bluetoothtoolkit

Checks if Bluetooth classic, BLE Central and peripheral modes are supported from the current device.

--> Bluetooth Classic is available in all android devices

--> BLE Central mode is available from android "Jelly Bean 4.3.x" and above

--> BLE peripheral mode is only supported from android Lollipop and above, however not all android devices that have Lollipop support the peripheral mode.

Graphics by George Alexandrou