如何获取手机设备的IMIE码

    public void fetch_status(){          TelephonyManager tm = (TelephonyManager) this          .getSystemService(Context.TELEPHONY_SERVICE);//              String str = "";          str += "DeviceId(IMEI) = " + tm.getDeviceId() + "\n";           str += "DeviceSoftwareVersion = " + tm.getDeviceSoftwareVersion() + "\n";           str += "Line1Number = " + tm.getLine1Number() + "\n";           str += "NetworkCountryIso = " + tm.getNetworkCountryIso() + "\n";           str += "NetworkOperator = " + tm.getNetworkOperator() + "\n";           str += "NetworkOperatorName = " + tm.getNetworkOperatorName() + "\n";           str += "NetworkType = " + tm.getNetworkType() + "\n";           str += "PhoneType = " + tm.getPhoneType() + "\n";           str += "SimCountryIso = " + tm.getSimCountryIso() + "\n";           str += "SimOperator = " + tm.getSimOperator() + "\n";           str += "SimOperatorName = " + tm.getSimOperatorName() + "\n";           str += "SimSerialNumber = " + tm.getSimSerialNumber() + "\n";           str += "SimState = " + tm.getSimState() + "\n";           str += "SubscriberId(IMSI) = " + tm.getSubscriberId() + "\n";           str += "VoiceMailNumber = " + tm.getVoiceMailNumber() + "\n";           TextView sys = (TextView) findViewById(R.id.sys);          sys.setText(str);      }