android 获取系统一些信息

public class test0304 extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        TelephonyManager tm = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);   
        StringBuilder sb = new StringBuilder();   
        sb.append("\nDeviceId(IMEI) = " + tm.getDeviceId());   
        sb.append("\nDeviceSoftwareVersion = " + tm.getDeviceSoftwareVersion());   
        sb.append("\nLine1Number = " + tm.getLine1Number());   
        sb.append("\nNetworkCountryIso = " + tm.getNetworkCountryIso());   
        sb.append("\nNetworkOperator = " + tm.getNetworkOperator());   
        sb.append("\nNetworkOperatorName = " + tm.getNetworkOperatorName());   
        sb.append("\nNetworkType = " + tm.getNetworkType());   
        sb.append("\nPhoneType = " + tm.getPhoneType());   
        sb.append("\nSimCountryIso = " + tm.getSimCountryIso());   
        sb.append("\nSimOperator = " + tm.getSimOperator());   
        sb.append("\nSimOperatorName = " + tm.getSimOperatorName());   
        sb.append("\nSimSerialNumber = " + tm.getSimSerialNumber());   
        sb.append("\nSimState = " + tm.getSimState());   
        sb.append("\nSubscriberId(IMSI) = " + tm.getSubscriberId());   
        sb.append("\nVoiceMailNumber = " + tm.getVoiceMailNumber());   
        Log.e("info", sb.toString());   

    }
}