检查网络NetworkUtil

/** * Created by zxz on 2016/5/3. */public class NetworkUtil {    /**     * 网络是否可用     *     * @return true-有网络     */    public static boolean isNetworkAvailable(@NonNull Context cxt) {        ConnectivityManager manager = (ConnectivityManager) cxt.getSystemService(Context.CONNECTIVITY_SERVICE);        NetworkInfo networkInfo = manager.getActiveNetworkInfo();        boolean connected = false;        if (networkInfo != null && networkInfo.isConnected()) {            connected = true;        }        return connected;    }}