Question

我正在使用此代码（如下所示）通过我的Android应用程序的电子邮件发送图像，收到电子邮件但它没有图像。请告诉我的代码中有什么问题？

收到邮件： 电子邮件正文

代码：

package com.example.appdeveloper.appname;

import android.content.Context;
import android.net.Uri;
import android.os.AsyncTask;

import java.io.File;
import java.util.Properties;


import android.content.Context;
import android.os.AsyncTask;
import android.os.Environment;

import java.util.Properties;
import javax.mail.Address;
import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;



public class EmailHandler extends AsyncTask<Void, Void, Boolean> {

    private static String to = "reciever@example.com";
    private static String from = "sender@example.com";
    private static String subject = "Subject";
    private static String sender = "Android App";
    private static String mail;
    private static String username = "sender";
    private static String password = "password";


    EmailHandler(Context context) {
        String path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES)+"/test.png";
        mail ="<!DOCTYPE html><html><body><img src="+path+"></body></html>";
    }


    @Override
    protected Boolean doInBackground(Void... nothing) {
        try {
            Authenticator auth = new EmailAutherticator();
            Properties properties = new Properties();
            properties.setProperty("mail.smtp.auth", "true");
            properties.setProperty("mail.smtp.starttls.enable", "true");
            properties.setProperty("mail.smtp.host", "smtp.gmail.com");
            properties.setProperty("mail.smtp.port", "587");
            properties.setProperty("mail.smtp.user", username);
            properties.setProperty("mail.smtp.password", password);
            Session session = Session.getDefaultInstance(properties,auth);

            MimeMessage message = new MimeMessage(session);
            message.setSubject(subject);
            message.setContent(mail, "text/html; charset=utf-8");
            Address address = new InternetAddress(from,sender);
            message.setFrom(address);

            InternetAddress ad[] = new InternetAddress[2];
            ad[0] = new InternetAddress(to);
            ad[1] = new InternetAddress(from);
            message.addRecipients( Message.RecipientType.TO, ad );
            Transport.send(message);

            return true;
        }
        catch(Exception exp) {
            exp.printStackTrace();
            return false;
        }
    }

}



class EmailAutherticator extends Authenticator {

    private String username = "sender";
    private String password = "password";

    public EmailAutherticator() {
        super();
    }

    public EmailAutherticator(String user,String pwd){
        super();
        username = user;
        password = pwd;
    }

    public PasswordAuthentication getPasswordAuthentication(){
        return new PasswordAuthentication(username,password);
    }

}

Answer 1

所以你的电子邮件就像这样（有点）：

<!DOCTYPE html><html><body><img src="\myPhone\DCIM\image.png"></body></html>

除非您在手机上阅读电子邮件，否则您的电子邮件无法到达该位置。

编辑1

您可以使用Android文档here中所述的Intent.EXTRA_STREAM为您的意图附加额外数据

在电子邮件中发送图像不起作用

1 个答案: