Android 应用程序开发 - 直接发送电子邮件，无需任何意图

Question

谁能建议我如何在不使用意图或打开另一个安卓应用程序的情况下发送电子邮件。我希望在点击发送按钮后直接发送电子邮件。我必须使用特定的 office365 电子邮件来发送邮件。我应该使用一些API还是SMTP等？

有没有一种简单的方法可以在我的安卓应用程序上应用此功能？

Answer 1

浏览下面的链接。这是您真正想要的示例http://www.edumobile.org/android/send-email-on-button-click-without-email-chooser/

Answer 2

地狱@APX，这是 tow 类，可帮助您在没有任何库的情况下与单个或多个用户发送电子邮件，我认为这会对您有所帮助，

import javax.activation.DataHandler;
import javax.activation.DataSource;
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;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.security.Security;
import java.util.Properties;
public class MailSender extends javax.mail.Authenticator {
    private String mailhost = "smtp.gmail.com";
    private String user;
    private String password;
    private Session session;
    static {
        Security.addProvider(new JSSEProvider());
    }
    public MailSender(String user, String password) {
        this.user = user;
        this.password = password;
        Properties props = new Properties();
        props.setProperty("mail.transport.protocol", "smtp");
        props.setProperty("mail.host", mailhost);
        props.put("mail.smtp.auth", "true");
        props.put("mail.smtp.port", "465");
        props.put("mail.smtp.socketFactory.port", "465");
        props.put("mail.smtp.socketFactory.class",
                "javax.net.ssl.SSLSocketFactory");
        props.put("mail.smtp.socketFactory.fallback", "false");
        props.setProperty("mail.smtp.quitwait", "false");
        session = Session.getDefaultInstance(props, this);
    }
    protected PasswordAuthentication getPasswordAuthentication() {
        return new PasswordAuthentication(user, password);
    }
    public synchronized void sendMail(String subject, String body, String sender, String from, String recipients) throws Exception {
        try {
            MimeMessage message = new MimeMessage(session);
            DataHandler handler = new DataHandler(new ByteArrayDataSource(body.getBytes(), "text/html"));
            /*message.setSender(new InternetAddress(sender, "Dhaval Solanki"));*/
            message.setFrom(new InternetAddress(sender, from));
            message.setSubject(subject);
            message.setDataHandler(handler);
            if (recipients.indexOf(',') > 0)
                message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(recipients));
            else
                message.setRecipient(Message.RecipientType.TO, new InternetAddress(recipients));
            Transport.send(message);
        } catch (Exception e) {
        }
    }
    public class ByteArrayDataSource implements DataSource {
        private byte[] data;
        private String type;
        public ByteArrayDataSource(byte[] data, String type) {
            super();
            this.data = data;
            this.type = type;
        }
        public ByteArrayDataSource(byte[] data) {
            super();
            this.data = data;
        }
        public void setType(String type) {
            this.type = type;
        }
        public String getContentType() {
            if (type == null)
                return "application/octet-stream";
            else
                return type;
        }
        public InputStream getInputStream() throws IOException {
            return new ByteArrayInputStream(data);
        }
        public String getName() {
            return "ByteArrayDataSource";
        }
        public OutputStream getOutputStream() throws IOException {
            throw new IOException("Not Supported");
        }
    }
}


*  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
/**
 * @author Alexander Y. Kleymenov
 * @version $Revision$
 */

import java.security.AccessController;
import java.security.Provider;
public final class JSSEProvider extends Provider {
    public JSSEProvider() {
        super("HarmonyJSSE", 1.0, "Harmony JSSE Provider");
        AccessController.doPrivileged(new java.security.PrivilegedAction<Void>() {
            public Void run() {
                put("SSLContext.TLS",
                        "org.apache.harmony.xnet.provider.jsse.SSLContextImpl");
                put("Alg.Alias.SSLContext.TLSv1", "TLS");
                put("KeyManagerFactory.X509",
                        "org.apache.harmony.xnet.provider.jsse.KeyManagerFactoryImpl");
                put("TrustManagerFactory.X509",
                        "org.apache.harmony.xnet.provider.jsse.TrustManagerFactoryImpl");
                return null;
            }
        });
    }
}

你可以像下面这样使用

MailSender sender = new MailSender("" + authEmail, "" + authPwd);
                    sender.sendMail("" + subject,
                            "" + prepareMailText(name),
                            "" + authEmail, "WeMeal Team",
                            "" + emailList); //email list send comma separated string like ("[e-mail],[e-mail]")