网络状态判断工具类

public class NetWorkUtils {
    /**
     * 网络连接类型的枚举类
     */
    public enum NetworkType {
        NOT_CONNECTED, TYPE_WIFI, TYPE_WAP, TYPE_NET
    }

    /**
     * 获取网络连接类型
     */
    public static NetworkType getNetworkType(Context context) {
        NetworkType type = NetworkType.NOT_CONNECTED;
        ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        if (manager != null) {
            NetworkInfo info = manager.getActiveNetworkInfo();
            if (info.getType() == ConnectivityManager.TYPE_WIFI) {
                type = NetworkType.TYPE_WIFI;
            } else if (info.getType() == ConnectivityManager.TYPE_MOBILE) {
                String extra = info.getExtraInfo();
                if (!TextUtils.isEmpty(extra)) {
                    if (extra.toLowerCase(Locale.CHINA).equals("cmnet")) {
                        type = NetworkType.TYPE_NET;
                    } else {
                        type = NetworkType.TYPE_WAP;
                    }
                }
            }
        }
        return type;
    }

    /**
     * 判断是否联网
     */
    public static boolean isNetworkConnected(Context context) {
        boolean connected = false;
        ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        if (manager != null) {
            NetworkInfo info = manager.getActiveNetworkInfo();
            if (info != null) {
                connected = info.isConnectedOrConnecting();
            }
        }
        return connected;
    }
    public static final int NETWORN_NONE = 0;
    public static final int NETWORN_WIFI = 1;
    public static final int NETWORN_MOBILE = 2;

    public static int getNetworkState(Context context) {
        ConnectivityManager connManager = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);

        // Wifi
        NetworkInfo.State state = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI)
                .getState();
        if (state == NetworkInfo.State.CONNECTED || state == NetworkInfo.State.CONNECTING) {
            return NETWORN_WIFI;
        }

        // 3G
        state = connManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE)
                .getState();
        if (state == NetworkInfo.State.CONNECTED || state == NetworkInfo.State.CONNECTING) {
            return NETWORN_MOBILE;
        }
        return NETWORN_NONE;
    }
    //提示view的隐藏和显示
    public static void remindViewState(Context context,ViewGroup view){
        if(isNetworkConnected(context)){
            view.setVisibility(View.GONE);
        }else{
            view.setVisibility(View.VISIBLE);
        }
    }

}