getWifiSSID, getNetworkCountryIso, getNetworkOperator, getSimOperator

network.java

/**
 * Gets the SSID of the currently associated WiFi access point if there is one. Otherwise,
 * returns empty string.
 */
@CalledByNative
public static String getWifiSSID(Context context) {
    if (context == null) {
        return "";
    }
    final Intent intent = context.registerReceiver(
            null, new IntentFilter(WifiManager.NETWORK_STATE_CHANGED_ACTION));
    if (intent != null) {
        final WifiInfo wifiInfo = intent.getParcelableExtra(WifiManager.EXTRA_WIFI_INFO);
        if (wifiInfo != null) {
            final String ssid = wifiInfo.getSSID();
            if (ssid != null) {
                return ssid;
            }
        }
    }
    return "";
}
    /**
     * Returns the ISO country code equivalent of the current MCC.
     */
    @CalledByNative
    private static String getNetworkCountryIso(Context context) {
        TelephonyManager telephonyManager =
                (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
        if (telephonyManager == null) return "";
        return telephonyManager.getNetworkCountryIso();
    }

    /**
     * Returns the MCC+MNC (mobile country code + mobile network code) as
     * the numeric name of the current registered operator.
     */
    @CalledByNative
    private static String getNetworkOperator(Context context) {
        TelephonyManager telephonyManager =
                (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
        if (telephonyManager == null) return "";
        return telephonyManager.getNetworkOperator();
    }

    /**
     * Returns the MCC+MNC (mobile country code + mobile network code) as
     * the numeric name of the current SIM operator.
     */
    @CalledByNative
    private static String getSimOperator(Context context) {
        TelephonyManager telephonyManager =
                (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
        if (telephonyManager == null) return "";
        return telephonyManager.getSimOperator();
    }