Question

嘿我正在尝试将图像上传到我的ftp服务器，但由于某种原因连接不起作用，我可以找出原因..

这是连接代码：

 public  void uploadingFilestoFtp() throws IOException {
    FTPClient ftpclient = new FTPClient();
    FileInputStream fis = null;
    boolean result;


    try {
        ftpclient.connect(host);

        result = ftpclient.login(username, password);

        if (result == true) {
            System.out.println("Logged in Successfully !");
        } else {
            System.out.println("Login Fail!");
            return;
        }
        ftpclient.setFileType(FTP.BINARY_FILE_TYPE);

        ftpclient.changeWorkingDirectory("/");

        File file = new File(imagePath);
        fis = new FileInputStream(file);

        // Upload file to the ftp serverresult = ftpclient.storeFile(testName, fis);

        if (result == true) {
            System.out.println("File is uploaded successfully");
        } else {
            System.out.println("File uploading failed");
        }
        ftpclient.logout();
    } catch (FTPConnectionClosedException e) {
        e.printStackTrace();
    } finally {
        try {
            ftpclient.disconnect();
        } catch (FTPConnectionClosedException e) {
            System.out.println(e);
        }
    }
}

我正在使用ftp服务器的详细信息，但它似乎无法正常工作

我怎样才能让这个方法发挥作用？

Answer 1

android.os.NetworkOnMainThreadException

您正尝试从UI线程发出网络请求。 Android不允许来自主（UI）线程的任何网络请求。您需要创建一个扩展AsyncTask的类。

public class UploadFileTask extends AsyncTask <Void, Void, Void > {

    public void onPreExecute() {

    }

    public void doInBackground(Void...unused) {
        uploadingFilestoFtp(); //Call your method here. Put necessary try-catch block.
    }

    public void onPostExecute(Void unused) {
        // do something when upload is done.
    }
}

请注意，此onPreExecute()和onPostExecute()在UI线程上运行。所以你可以在网络通话之前或之后做任何事情。使用doInBackground()方法进行网络呼叫。

检查此答案How to fix android.os.NetworkOnMainThreadException?

Android上传图片到ftp服务器无法正常工作

1 个答案: