【移动应用开发技术】怎么在Android中利用Javamail发送Email

【移动应用开发技术】怎么在Android中利用Javamail发送Email

怎么在Android中利用Javamail发送Email？针对这个问题，这篇文章详细介绍了相对应的分析和解答，希望可以帮助更多想解决这个问题的小伙伴找到更简单易行的方法。将activation.jar,additionnal.jar,mail.jar放到项目的libs文件夹。然后在项目中选中这三个包，右击->BuildPath->AddtobuildPath.添加成功后项目就像这样.项目中添加Mail类package

com.example.mailtest;

import

java.util.Date;

import

java.util.Properties;

import

javax.activation.CommandMap;

import

javax.activation.DataHandler;

import

javax.activation.DataSource;

import

javax.activation.FileDataSource;

import

javax.activation.MailcapCommandMap;

import

javax.mail.BodyPart;

import

javax.mail.Multipart;

import

javax.mail.PasswordAuthentication;

import

javax.mail.Session;

import

javax.mail.Transport;

import

ernet.InternetAddress;

import

ernet.MimeBodyPart;

import

ernet.MimeMessage;

import

ernet.MimeMultipart;

public

class

Mail

extends

javax.mail.Authenticator

{

private

String

_user;

private

String

_pass;

private

String[]

_to;

private

String

_from;

private

String

_port;

private

String

_sport;

private

String

_host;

private

String

_subject;

private

String

_body;

private

boolean

_auth;

private

boolean

_debuggable;

private

Multipart

_multipart;

public

Mail()

{

_host

=

"";

//

default

smtp

server

_port

=

"465";

//

default

smtp

port

_sport

=

"465";

//

default

socketfactory

port

_user

=

"";

//

username

_pass

=

"";

//

password

_from

=

"";

//

email

sent

from

_subject

=

"";

//

email

subject

_body

=

"";

//

email

body

_debuggable

=

false;

//

debug

mode

on

or

off

-

default

off

_auth

=

true;

//

smtp

authentication

-

default

on

_multipart

=

new

MimeMultipart();

//

There

is

something

wrong

with

MailCap,

javamail

can

not

find

a

handler

for

the

multipart/mixed

part,

so

this

bit

needs

to

be

added.

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);

}

public

Mail(String

user,

String

pass)

{

this();

_user

=

user;

_pass

=

pass;

}

public

void

setTo(String[]

toArr)

{

this._to

=

toArr;

}

public

void

setFrom(String

string)

{

this._from

=

string;

}

public

void

setSubject(String

string)

{

this._subject

=

string;

}

public

boolean

send()

throws

Exception

{

Properties

props

=

_setProperties();

if(!_user.equals("")

&&

!_pass.equals("")

&&

_to.length

>

0

&&

!_from.equals("")

&&

!_subject.equals("")

&&

!_body.equals(""))

{

Session

session

=

Session.getInstance(props,

this);

MimeMessage

msg

=

new

MimeMessage(session);

msg.setFrom(new

InternetAddress(_from));

InternetAddress[]

addressTo

=

new

InternetAddress[_to.length];

for

(int

i

=

0;

i

<

_to.length;

i++)

{

addressTo[i]

=

new

InternetAddress(_to[i]);

}

msg.setRecipients(MimeMessage.RecipientType.TO,

addressTo);

msg.setSubject(_subject);

msg.setSentDate(new

Date());

//

setup

message

body

BodyPart

messageBodyPart

=

new

MimeBodyPart();

messageBodyPart.setText(_body);

_multipart.addBodyPart(messageBodyPart);

//

Put

parts

in

message

msg.setContent(_multipart);

//

send

email

Transport.send(msg);

return

true;

}

else

{

return

false;

}

}

public

void

addAttachment(String

filename)

throws

Exception

{

BodyPart

messageBodyPart

=

new

MimeBodyPart();

DataSource

source

=

new

FileDataSource(filename);

messageBodyPart.setDataHandler(new

DataHandler(source));

messageBodyPart.setFileName(filename);

_multipart.addBodyPart(messageBodyPart);

}

@Override

public

PasswordAuthentication

getPasswordAuthentication()

{

return

new

PasswordAuthentication(_user,

_pass);

}

private

Properties

_setProperties()

{

Properties

props

=

new

Properties();

props.put("mail.smtp.host",

_host);

if(_debuggable)

{

props.put("mail.debug",

"true");

}

if(_auth)

{

props.put("mail.smtp.auth",

"true");

}

props.put("mail.smtp.port",

_port);

props.put("mail.smtp.socketFactory.port",

_sport);

props.put("mail.smtp.socketFactory.class",

".ssl.SSLSocketFactory");

props.put("mail.smtp.socketFactory.fallback",

"false");

return

props;

}

//

the

getters

and

setters

public

String

getBody()

{

return

_body;

}

public

void

setBody(String

_body)

{

this._body

=

_body;

}

//

more

of

the

getters

and

setters

…..

}MailActivity调用package

com.example.mailtest;

import

java.util.Properties;

import

javax.mail.Address;

import

javax.mail.Message;

import

javax.mail.Session;

import

javax.mail.Transport;

import

ernet.InternetAddress;

import

ernet.MimeMessage;

import

android.os.AsyncTask;

import

android.os.Bundle;

import

android.os.Handler;

import

android.app.Activity;

import

android.app.ProgressDialog;

import

android.util.Log;

import

android.view.Menu;

import

android.view.View;

import

android.widget.Button;

import

android.widget.Toast;

public

class

MailActivity

extends

Activity

{

private

Button

sendBtn;

private

String

username;

private

String

password;

private

Handler

sendHandler;

private

ProgressDialog

progressDialog;

@Override

protected

void

onCreate(Bundle

savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_mail);

sendBtn=(Button)findViewById(R.id.btnSend);

sendHandler

=

new

Handler();

sendBtn.setOnClickListener(new

View.OnClickListener()

{

public

void

onClick(View

v)

{

SendTask

sTask

=

new

SendTask();

sTask.execute();

}

});

}

@Override

public

boolean

onCreateOptionsMenu(Menu

menu)

{

//

Inflate

the

menu;

this

adds

items

to

the

action

bar

if

it

is

present.

getMenuInflater().inflate(R.menu.activity_mail,

menu);

return

true;

}

class

SendTask

extends

AsyncTask<Integer,

Integer,

String>{

//后面尖括号内分别是参数（例子里是线程休息时间），进度(publishProgress用到)，返回值

类型

@Override

protected

void

onPreExecute()

{

//第一个执行方法

Toast.makeText(getApplicationContext(),

"Begin

Send!",

Toast.LENGTH_SHORT).show();

super.onPreExecute();

}

@Override

protected

String

doInBackground(Integer...

params)

{

//第二个执行方法,onPreExecute()执行完后执行

//

TODO

Auto-generated

method

stub

Mail

m

=

new

Mail("empty.shen@",

"*****");

String[]

toArr

=

{"silangquan@","k283228391@126.com"};

m.setTo(toArr);

m.setFrom("wooo@");

m.setSubject("JavamailTest");

m.setBody("Email

body.");

try

{

//If

you

want

add

attachment

use

function

addAttachment.

//m.addAttachment("/sdcard/filelocation");

if(m.send())

{

System.out.println("Email

was

sent

successfully.");

}

else

{

System.out.println("Email

was

not

sent.");

}

}

catch(Exception

e)

{

//Toast.makeText(MailApp.this,

"There

was

a

problem

sending

the

email.",

Toast.LENGTH_LONG).show();

Log.e("MailApp",

"Could

not

send

email",

e);

}

return

"";

}

@Override

protected

void

onProgressUpdate(Integer...

progress)

{

//这个函数在doInBackground调用publishProgress时触发，虽然调用时只有一个参数

//但是这里取到的是一个数组,所以要用progesss[0]来取值

//第n个参数就用progress[n]来取值

super.onProgressUpdate(progress);

}

@Override

protected

void

onPostExecute(String

r)

{

//doInBackground返回时触发，换句话说，就是doInBackground执行完后触发

//这里的result就是上面doInBackground执行后的返回值，所以这里是"执行完毕"