public class NetUtils {
    /**
     * 判斷網路狀態是否可用
     *
     * @param context
     * @return
     */
    public static boolean isNetAvailable(Context context) {
        ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo info = manager.getActiveNetworkInfo();
        if (info == null) {
            return false;
        }
        return info.isAvailable();
    }
	
}