列出cellInfos =（List）this.telephonyManager.getAllCellInfo（）;
for（CellInfo cellInfo：cellInfos） { CellInfoGsm cellInfoGsm =（CellInfoGsm）cellInfo;
CellIdentityGsm cellIdentity = cellInfoGsm.getCellIdentity();
CellSignalStrengthGsm cellSignalStrengthGsm = cellInfoGsm.getCellSignalStrength();
Log.d("cell", "registered: "+cellInfoGsm.isRegistered());
Log.d("cell", cellIdentity.toString());
Log.d("cell", cellSignalStrengthGsm.toString());
}