我的android设备版本是4.2.2 ，运行 android sdk demo  抛出异常 

03-26 10:08:34.514: E/Trace(15589): error opening trace file: No such file or directory (2)

03-26 10:08:34.704: E/dalvikvm(15589): Could not find class 'android.bluetooth.BluetoothManager', referenced from method com.brtbeacon.sdk.utils.Util.getDeviceId

03-26 10:08:34.704: W/dalvikvm(15589): VFY: unable to resolve check-cast 41 (Landroid/bluetooth/BluetoothManager;) in Lcom/brtbeacon/sdk/utils/Util;

请问这块对系统版本的要求是怎样的？