如何在Android中实现将照片上传到FTP服务器的完整代码示例？-岚柏博客

在Android应用中实现将照片传送到FTP服务器的功能，需要使用一些网络编程和文件操作的知识，以下是详细的步骤和代码示例，帮助你完成这个任务。

1. 准备工作

1 添加权限

需要在AndroidManifest.xml文件中添加必要的权限：

<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

2 添加依赖库

为了简化FTP操作，可以使用Apache Commons Net库，在你的build.gradle文件中添加以下依赖：

implementation 'commons-net:commons-net:3.8.0'

2. 获取照片

1 从相册选择照片

可以通过Intent来启动系统相册并选择照片：

private static final int PICK_IMAGE = 1;
private void selectImage() {
    Intent intent = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
    startActivityForResult(intent, PICK_IMAGE);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == PICK_IMAGE && resultCode == RESULT_OK && data != null) {
        Uri selectedImage = data.getData();
        uploadImageToFtp(selectedImage);
    }
}

3. 上传照片到FTP服务器

1 创建FTP客户端类

创建一个FTP客户端类来处理FTP连接和文件上传：

import org.apache.commons.net.ftp.FTP;
import org.apache.commons.net.ftp.FTPClient;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
public class FtpUploader {
    private String server;
    private int port;
    private String user;
    private String pass;
    public FtpUploader(String server, int port, String user, String pass) {
        this.server = server;
        this.port = port;
        this.user = user;
        this.pass = pass;
    }
    public boolean uploadFile(String localFilePath, String remoteFilePath) {
        FTPClient ftpClient = new FTPClient();
        try {
            ftpClient.connect(server, port);
            ftpClient.login(user, pass);
            ftpClient.enterLocalPassiveMode();
            ftpClient.setFileType(FTP.BINARY_FILE_TYPE);
            try (InputStream inputStream = new FileInputStream(localFilePath)) {
                return ftpClient.storeFile(remoteFilePath, inputStream);
            }
        } catch (IOException ex) {
            ex.printStackTrace();
            return false;
        } finally {
            try {
                if (ftpClient.isConnected()) {
                    ftpClient.logout();
                    ftpClient.disconnect();
                }
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
    }
}

2 上传图片到FTP服务器

在uploadImageToFtp方法中调用FTP客户端类进行上传：

private void uploadImageToFtp(Uri imageUri) {
    String filePath = getRealPathFromURI(imageUri); // 获取本地文件路径的方法见下文
    FtpUploader ftpUploader = new FtpUploader("ftp.example.com", 21, "username", "password");
    boolean success = ftpUploader.uploadFile(filePath, "/path/on/ftp/server/image.jpg");
    if (success) {
        Toast.makeText(this, "Upload successful!", Toast.LENGTH_SHORT).show();
    } else {
        Toast.makeText(this, "Upload failed!", Toast.LENGTH_SHORT).show();
    }
}

3 获取本地文件路径的方法

由于Android的URI机制，我们需要一个方法来获取实际的文件路径：

private String getRealPathFromURI(Uri contentUri) {
    String[] proj = {MediaStore.Images.Media.DATA};
    CursorLoader loader = new CursorLoader(this, contentUri, proj, null, null, null);
    Cursor cursor = loader.loadInBackground();
    int columnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
    cursor.moveToFirst();
    String result = cursor.getString(columnIndex);
    cursor.close();
    return result;
}

4. 完整代码示例

以下是完整的代码示例，包括所有步骤：

import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.widget.Toast;
import org.apache.commons.net.ftp.FTP;
import org.apache.commons.net.ftp.FTPClient;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "." + "</pre>

原创文章，作者：未希，如若转载，请注明出处：https://www.lbseo.cn/12156.html

如何在Android中实现将照片上传到FTP服务器的完整代码示例？