我试图在Android中创建一个邮件发送应用程序。
如果我使用:
Intent emailIntent = new Intent(android.content.Intent.ACTION_SEND);
这将启动内置的Android应用程序;我试图发送邮件按钮点击直接不使用这个应用程序。
当前回答
GmailBackground是一个小型库，可以在后台发送电子邮件，无需用户交互:
用法:
BackgroundMail.newBuilder(this)
.withUsername("username@gmail.com")
.withPassword("password12345")
.withMailto("toemail@gmail.com")
.withType(BackgroundMail.TYPE_PLAIN)
.withSubject("this is the subject")
.withBody("this is the body")
.withOnSuccessCallback(new BackgroundMail.OnSuccessCallback() {
@Override
public void onSuccess() {
//do some magic
}
})
.withOnFailCallback(new BackgroundMail.OnFailCallback() {
@Override
public void onFail() {
//do some magic
}
})
.send();
配置:
repositories {
// ...
maven { url "https://jitpack.io" }
}
dependencies {
compile 'com.github.yesidlazaro:GmailBackground:1.2.0'
}
权限:
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.INTERNET"/>
对于附件，你需要设置READ_EXTERNAL_STORAGE权限:
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
源
(我自己测试过)
其他回答
在Android中使用JavaMail API使用Gmail身份验证发送电子邮件。
创建示例项目的步骤:
MailSenderActivity.java:
public class MailSenderActivity extends Activity {
@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) {
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:
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");
}
}
}
JSSEProvider.java:
/*
* 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;
}
});
}
}
将下面链接中的3个罐子添加到你的Android项目中
mail.jar activation.jar additional.jar
点击这里-如何添加外部罐子
别忘了在你的清单上加上这一行:
<uses-permission android:name="android.permission.INTERNET" />
只需点击下面的链接，更改帐户访问不太安全的应用程序 https://www.google.com/settings/security/lesssecureapps
运行项目并检查收件人邮件帐户。
另外，别忘了你不能在android的任何活动中进行网络操作。 因此，建议使用AsyncTask或IntentService来避免主线程网络异常。
Jar文件:https://code.google.com/archive/p/javamail-android/
谢谢你提供的宝贵信息。代码运行正常。我也可以通过添加以下代码添加附件。
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);
如果使用“smtp.gmail.com”作为默认的smtp服务器，请注意。
谷歌将迫使您更改您的链接电子邮件帐户密码频繁由于他们过于热心的“可疑活动”政策。本质上，它将短时间内来自不同国家的重复smtp请求视为“可疑活动”。因为他们假设你(电子邮件账户持有人)一次只能在一个国家。
当谷歌系统检测到“可疑活动”时，它将阻止进一步的电子邮件，直到您更改密码。因为你已经将密码硬编码到应用程序中，每次发生这种情况，你都必须重新发布应用程序，这并不理想。这种情况发生在一周内3次对我来说，我甚至存储密码在另一个服务器上，每次谷歌强迫我更改密码时，我都动态地获取密码。
因此，我建议使用许多免费的smtp提供商之一，而不是“smtp.gmail.com”，以避免这个安全问题。使用相同的代码，但将“smtp.gmail.com”更改为新的smtp转发主机。
其他答案中提供的所有代码都是正确的，运行正常，但有点混乱，所以我决定发布一个库(尽管仍在开发中)，以更简单的方式使用它:AndroidMail。
你只需要创建一个MailSender，构建一个邮件并发送它(已经在后台处理了一个AsyncTask)。
MailSender mailSender = new MailSender(email, password);
Mail.MailBuilder builder = new Mail.MailBuilder();
Mail mail = builder
.setSender(senderMail)
.addRecipient(new Recipient(recipient))
.setText("Hello")
.build();
mailSender.sendMail(mail);
您可以收到通知的电子邮件发送，它还支持不同的收件人类型(TO，抄送和密件抄送)，附件和html:
MailSender mailSender = new MailSender(email, password);
Mail.MailBuilder builder = new Mail.MailBuilder();
Mail mail = builder
.setSender(senderMail)
.addRecipient(new Recipient(recipient))
.addRecipient(new Recipient(Recipient.TYPE.CC, recipientCC))
.setText("Hello")
.setHtml("<h1 style=\"color:red;\">Hello</h1>")
.addAttachment(new Attachment(filePath, fileName))
.build();
mailSender.sendMail(mail, new MailSender.OnMailSentListener() {
@Override
public void onSuccess() {
// mail sent!
}
@Override
public void onError(Exception error) {
// something bad happened :(
}
});
您可以通过Gradle或Maven获取:
compile 'it.enricocandino:androidmail:1.0.0-SNAPSHOT'
如果你有任何问题，请告诉我!：）
要加附件，别忘了加。
MailcapCommandMap mc = (MailcapCommandMap) CommandMap
.getDefaultCommandMap();
mc.addMailcap("text/html;; x-java-content-handler=com.sun.mail.handlers.text_html");
mc.addMailcap("text/xml;; x-java-content-handler=com.sun.mail.handlers.text_xml");
mc.addMailcap("text/plain;; x-java-content-handler=com.sun.mail.handlers.text_plain");
mc.addMailcap("multipart/*;; x-java-content-handler=com.sun.mail.handlers.multipart_mixed");
mc.addMailcap("message/rfc822;; x-java-content-handler=com.sun.mail.handlers.message_rfc822");
CommandMap.setDefaultCommandMap(mc);
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