以下是一个示例代码，演示如何在Android应用中发送带附件的购物卡订单电子邮件，而不使用意图：

import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Environment;
import android.util.Log;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.net.URLConnection;

public class EmailAttachmentSender {

    private static final String TAG = "EmailAttachmentSender";

    private Context mContext;
    private String mRecipientEmail;
    private String mSubject;
    private String mBody;
    private String mAttachmentUrl;

    public EmailAttachmentSender(Context context, String recipientEmail, String subject, String body, String attachmentUrl) {
        mContext = context;
        mRecipientEmail = recipientEmail;
        mSubject = subject;
        mBody = body;
        mAttachmentUrl = attachmentUrl;
    }

    public void sendEmailWithAttachment() {
        new DownloadTask().execute(mAttachmentUrl);
    }

    private class DownloadTask extends AsyncTask {

        @Override
        protected File doInBackground(String... urls) {
            String attachmentUrl = urls[0];

            try {
                URL url = new URL(attachmentUrl);
                URLConnection connection = url.openConnection();
                connection.connect();

                File directory = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
                File file = new File(directory, "attachment.jpg");

                InputStream inputStream = connection.getInputStream();
                OutputStream outputStream = new FileOutputStream(file);

                byte[] buffer = new byte[4096];
                int bytesRead;
                while ((bytesRead = inputStream.read(buffer)) != -1) {
                    outputStream.write(buffer, 0, bytesRead);
                }

                outputStream.close();
                inputStream.close();

                return file;
            } catch (IOException e) {
                Log.e(TAG, "Error downloading attachment", e);
            }

            return null;
        }

        @Override
        protected void onPostExecute(File file) {
            if (file != null) {
                sendEmail(file);
            } else {
                // Handle error
            }
        }
    }

    private void sendEmail(File attachmentFile) {
        Intent intent = new Intent(Intent.ACTION_SEND);
        intent.setType("message/rfc822");
        intent.putExtra(Intent.EXTRA_EMAIL, new String[]{mRecipientEmail});
        intent.putExtra(Intent.EXTRA_SUBJECT, mSubject);
        intent.putExtra(Intent.EXTRA_TEXT, mBody);
        intent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(attachmentFile));

        mContext.startActivity(Intent.createChooser(intent, "Send email"));
    }
}

要使用此示例代码，只需创建一个EmailAttachmentSender对象并调用sendEmailWithAttachment方法：

EmailAttachmentSender emailSender = new EmailAttachmentSender(context, "recipient@example.com", "Order Confirmation", "Thank you for your order!", "https://example.com/attachment.jpg");
emailSender.sendEmailWithAttachment();

请注意，此示例假设您有适当的权限来访问Internet和外部存储。您还可以根据需要修改文件下载和附件的类型和文件名。