java - Android 如何连接到 FTP？

Question

我正在尝试通过 apache FTP 连接到服务器:

public boolean ftpConnect(String host, String user, String pass){
        try {
            ftpClient = new FTPClient();
            ftpClient.connect(host);
            if(FTPReply.isPositiveCompletion(ftpClient.getReplyCode())){
                boolean status = ftpClient.login(user, pass);
                ftpClient.enterLocalPassiveMode();
                return status;
            }
        } catch (SocketException e) {
            Log.d("FTP", "Error: could not connect to socket " + host );
        } catch (IOException e) {
            Log.d("FTP", "Error: could not connect to host " + host );
        }
        return false;
}

如果我通过 WI-FI 连接到互联网，上面的代码可以工作，但是如果我通过 3G 连接则不能工作。我已经在显现。我还没有在谷歌上找到对此的解释。

Answer 1

try {
    FTPClient ftpClient = new FTPClient();
    ftpClient.connect(InetAddress.getByName(Your host Url));
    ftpClient.login(loginName, password);
    System.out.println("status :: " + ftpClient.getStatus());
} catch (Exception e) {
    e.printStackTrace();
}

此外，请在此处查看我的回答:Track FTP upload data in android? .