我想在Android上实现一个可以用mail发送应用程序的功能。如果使用:
Intent emailIntent = new Intent(android.content.Intent.ACTION_SEND);
实现上述命令,就会启动Android内置的应用程序。所以,我想要设置一个按钮,这样,点击按钮直接就可以发送邮件,而不需要再次启动程序,具体该怎么做呢?
原文:Sending Email in Android using JavaMail API without using the default/built-in app
答:Vinayak.B
借助已获得Gmail权限的JavaMail API,然后在Android中便可发送邮件,
具体需要构建的project样例如下:
MailSenderActivity.java
YOUR PACKAGE; import android.app.Activity; import android.os.Bundle; import android.util.Log; import android.view.View; import android.widget.Button; public class MailSenderActivity extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); final Button send = (Button) this.findViewById(R.id.send); send.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { // TODO Auto-generated method stub try { GMailSender sender = new GMailSender("username@gmail.com", "password"); sender.sendMail("This is Subject", "This is Body", "user@gmail.com", "user@yahoo.com"); } catch (Exception e) { Log.e("SendMail", e.getMessage(), e); } } }); } }
GmailSender.java
YOUR PACKAGE; 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 GMailSender extends javax.mail.Authenticator { private String mailhost = "smtp.gmail.com"; private String user; private String password; private Session session; static { Security.addProvider(new com.provider.JSSEProvider()); } public GMailSender(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 recipients) throws Exception { try{ MimeMessage message = new MimeMessage(session); DataHandler handler = new DataHandler(new ByteArrayDataSource(body.getBytes(), "text/plain")); message.setSender(new InternetAddress(sender)); 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"); } } }
JSSE Provider
/* * 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; } }); } }
然后在Android project中添加下述3个jars,
mail.jar
activation.jar
additionnal.jar
按照上述方法搭建project,然后检查收件人是否无误,一切搞定!
答:ManuV
我的方法是,将下述代码添加到你的manifest中,
<uses-permission android:name="android.permission.INTERNET" />
答:ashok reddy
多谢你的分享,这些代码都非常实用,此外,为了进一步完善邮件的发送功能,我想通过如下代码添加相关附件:
private Multipart _multipart; _multipart = new MimeMultipart(); public void addAttachment(String filename,String subject) throws Exception { BodyPart messageBodyPart = new MimeBodyPart(); DataSource source = new FileDataSource(filename); messageBodyPart.setDataHandler(new DataHandler(source)); messageBodyPart.setFileName(filename); _multipart.addBodyPart(messageBodyPart); BodyPart messageBodyPart2 = new MimeBodyPart(); messageBodyPart2.setText(subject); _multipart.addBodyPart(messageBodyPart2); } message.setContent(_multipart);