使用android应用程序将图片从devide上传到FTP

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

<Button
    android:id="@+id/selectButton"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Select Image" />

<ImageView
    android:id="@+id/imageView"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="10dp"
    android:scaleType="centerCrop" />

import android.Manifest;
import android.app.Activity;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

import org.apache.commons.net.ftp.FTP;
import org.apache.commons.net.ftp.FTPClient;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

public class MainActivity extends AppCompatActivity {

    private static final int REQUEST_PERMISSION = 1;
    private static final int REQUEST_IMAGE_CAPTURE = 2;
    private static final int REQUEST_IMAGE_SELECT = 3;

    private Button selectButton;
    private ImageView imageView;

    private String ftpServer = "ftp.example.com";
    private int ftpPort = 21;
    private String ftpUsername = "username";
    private String ftpPassword = "password";
    private String ftpRemoteDir = "/upload/";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        selectButton = findViewById(R.id.selectButton);
        imageView = findViewById(R.id.imageView);

        selectButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.READ_EXTERNAL_STORAGE)
                        != PackageManager.PERMISSION_GRANTED) {
                    ActivityCompat.requestPermissions(MainActivity.this,
                            new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, REQUEST_PERMISSION);
                } else {
                    selectImage();
                }
            }
        });
    }

    private void selectImage() {
        Intent intent = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
        startActivityForResult(intent, REQUEST_IMAGE_SELECT);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        if (resultCode == Activity.RESULT_OK) {
            if (requestCode == REQUEST_IMAGE_SELECT) {
                Uri selectedImageUri = data.getData();
                String imagePath = getPathFromUri(selectedImageUri);
                Bitmap bitmap = BitmapFactory.decodeFile(imagePath);
                imageView.setImageBitmap(bitmap);

                uploadImage(imagePath);
            }
        }
    }

    private String getPathFromUri(Uri uri) {
        String[] projection = {MediaStore.Images.Media.DATA};
        Cursor cursor = getContentResolver().query(uri, projection, null, null, null);
        int columnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
        cursor.moveToFirst();
        String imagePath = cursor.getString(columnIndex);
        cursor.close();
        return imagePath;
    }

    private void uploadImage(final String imagePath) {
        new Thread(new Runnable() {
            @Override
            public void run() {
                FTPClient ftpClient = new FTPClient();
                try {
                    ftpClient.connect(ftpServer, ftpPort);
                    ftpClient.login(ftpUsername, ftpPassword);
                    ftpClient.setFileType(FTP.BINARY_FILE_TYPE);
                    ftpClient.enterLocalPassiveMode();

                    File file = new File(imagePath);
                    BufferedInputStream buffIn = new BufferedInputStream(new FileInputStream(file));
                    ftpClient.storeFile(ftpRemoteDir + file.getName(), buffIn);
                    buffIn.close();
                    ftpClient.logout();
                    ftpClient.disconnect();

                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            Toast.makeText(MainActivity.this, "Image uploaded successfully", Toast.LENGTH_SHORT).show();
                        }
                    });
                } catch (IOException e) {
                    e.printStackTrace();
                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            Toast.makeText(MainActivity.this, "Failed to upload image", Toast.LENGTH_SHORT).show();
                        }
                    });
                }
            }
        }).start();
    }
}

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

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