如何将文件附加到电子邮件？ - 安卓

Question

我尝试将文件附加到电子邮件。 用户写入文件。 完成后，文件将保存在内部存储中，并应通过电子邮件发送。

代码如下：

// write text to file
public void WriteBtn(View v) {
    // add-write text into file
    try {
        FileOutputStream fileout = openFileOutput(fileName, MODE_PRIVATE);
        OutputStreamWriter outputWriter=new OutputStreamWriter(fileout);
        outputWriter.write(textmsg.getText().toString());
        outputWriter.close();
        fileout.close();
        String fileLocation= Environment.getDataDirectory()+"/"+fileName;
        Intent emailIntent = new Intent(Intent.ACTION_SEND);
        // set the type to 'email'
        emailIntent .setType("vnd.android.cursor.dir/email");
        String to[] = {"oshrat0207@gmail.com"};
        emailIntent .putExtra(Intent.EXTRA_EMAIL, to);
        // the attachment
        emailIntent .putExtra(Intent.EXTRA_STREAM, fileLocation);
        // the mail subject
        emailIntent .putExtra(Intent.EXTRA_SUBJECT, "Subject");
       // Uri uri = Uri.fromFile(new File(fileLocation));
        String sdCard = Environment.getExternalStorageDirectory().getAbsolutePath();
        Uri uri = Uri.fromFile(new File(sdCard +
                new String(new char[sdCard.replaceAll("[^/]", "").length()])
                        .replace("\0", "/..") + getFilesDir() + "/" + fileName));
        emailIntent.putExtra(android.content.Intent.EXTRA_STREAM, uri);
        startActivity(Intent.createChooser(emailIntent , "Send email..."));

        //display file saved message
        Toast.makeText(getBaseContext(), "File saved successfully! path:" + fileLocation,
                Toast.LENGTH_SHORT).show();

    } catch (Exception e) {
        e.printStackTrace();
    }
}

例外情况：

1. close() 从未在数据库“/data/data/com.google.android.gms/databases/phenotype.db”上显式调用 android.database.sqlite.DatabaseObjectNotClosedException：应用程序没有关闭此处打开的游标或数据库对象

2. 查找电子邮件提供商版本时出错.....

3. ctivity com.android.internal.app.ChooserActivity 泄露了最初在这里注册的 IntentReceiver com.android.internal.app.ResolverActivity$1@4107d478。您是否错过了对 unregisterReceiver() 的调用？ android.app.IntentReceiverLeaked: Activity com.android.internal.app.ChooserActivity 已经泄露了最初在这里注册的 IntentReceiver com.android.internal.app.ResolverActivity$1@4107d478。您是否错过了对 unregisterReceiver() 的调用？

我做错了什么？

Answer 1

您可以使用 JavaMail API 发送可以将文件附加到电子邮件的多部分电子邮件。要使用 JavaMail API 发送电子邮件，您需要加载两个 jar 文件：

邮件.jar 激活.jar

您可以到 Oracle 网站下载最新版本。

查看下面的示例

public MimeMessage createEmailMessage() throws AddressException,
MessagingException, UnsupportedEncodingException {

Session mailSession;
MimeMessage emailMessage;

    File csvFile = new File(csvFilePath);
    if(null != csvFile.list()){
        csvName = (csvFile.list())[0];
    }

    if(null != csvName ){

        mailSession = Session.getDefaultInstance(emailProperties, null);
        emailMessage = new MimeMessage(mailSession);

        emailMessage.setFrom(new InternetAddress(fromEmail, fromEmail));
        emailMessage.addRecipient(Message.RecipientType.TO,new InternetAddress(toEmail));

        emailMessage.setSubject(emailSubject);
        //emailMessage.setContent(emailBody, "text/html");// for a html email


        // creates message part
        MimeBodyPart messageBodyPart = new MimeBodyPart();
        //          messageBodyPart.setContent(message, "text/html");

        // creates multi-part
        Multipart multipart = new MimeMultipart();
        multipart.addBodyPart(messageBodyPart);

        File csvDir = new File(Constant.FilePathConstant.CSV_PATH );

        /***** attach csv files *****/
        if(csvDir.exists()){
            File[] csvList = xlsDir.listFiles();
            for (File file : csvList) {
                MimeBodyPart attachPart = new MimeBodyPart();
                System.out.println("@@@@@@@@@@@@@@@@@@@@@@ csv " + file.getAbsolutePath());
                try{
                    attachPart.attachFile(file.getAbsolutePath());
                }catch(Exception e){
                    e.printStackTrace();
                }
                multipart.addBodyPart(attachPart);
            }
        }


        // sets the multi-part as e-mail's content
        emailMessage.setContent(multipart);

         emailMessage.setText(emailBody);
        Logger.i("GMail", "Email Message created.");
    }
    return emailMessage;
}

public boolean sendEmail() throws AddressException, MessagingException {
    if(null != emailMessage){
        Transport transport = mailSession.getTransport("smtp");
        transport.connect(emailHost, fromEmail, fromPassword);
        transport.sendMessage(emailMessage, emailMessage.getAllRecipients());
        transport.close();
        Logger.i("Report", "Email sent successfully.");
        return true;
    }else{
        return false;
    }
}