Show RSSI Values if Bluetooth LE Device Connected

I have successfully connected to the BLE Devices. Next i want to show the rssi of that connected Devices. I am using existing project in github https://github.com/arpith20/BLEArduino. The project split up into DeviceScanActivity.java, DeviceControlActivity.java, BluetoothLeService.java and SimpleGattAttributes.java.

I don't know where to put the readRemoteRssi that i wanted to show as a Toast and in log activity. Hope you guys can help me out

Thanks

DeviceScanActivity.java https://github.com/arpith20/BLEArduino/blob/master/app/src/main/java/xyz/arpith/blearduino/DeviceScanActivity.java

SampleGattAttributes.java https://github.com/arpith20/BLEArduino/blob/master/app/src/main/java/xyz/arpith/blearduino/SampleGattAttributes.java

DeviceControlActivity.java https://github.com/arpith20/BLEArduino/blob/master/app/src/main/java/xyz/arpith/blearduino/DeviceControlActivity.java

BluetoothLeService.java https://github.com/arpith20/BLEArduino/blob/master/app/src/main/java/xyz/arpith/blearduino/BluetoothLeService.java