Android实现电子邮箱客户端

小灰灰 2022-07-30 14:21 483阅读 0赞

### 本文主要讲述了安卓平台上利用QQ邮箱SMTP协议，POP3协议发送与接收消息的实现 ###

### 发送邮件核心代码 ###

import java.security.Security;    
      import java.util.Date;    
      import java.util.Properties;    
    
       import javax.mail.Authenticator;    
        import javax.mail.Message;    
        import javax.mail.MessagingException;    
       import javax.mail.PasswordAuthentication;    
       import javax.mail.Session;    
       import javax.mail.Transport;    
        import javax.mail.internet.AddressException;    
        import javax.mail.internet.InternetAddress;    
       import javax.mail.internet.MimeMessage;    
    
        /**    
         * 使用Gmail发送邮件    
         * @author Winter Lau    
         */    
        public class GmailSender {    
    
         public static void main(String[] args) throws AddressException, MessagingException {    
          Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());    
          final String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";    
          // Get a Properties object    
          Properties props = System.getProperties();    
          props.setProperty("mail.smtp.host", "smtp.qq.com");    
          props.setProperty("mail.smtp.socketFactory.class", SSL_FACTORY);    
          props.setProperty("mail.smtp.socketFactory.fallback", "false");    
         props.setProperty("mail.smtp.port", "465");    
          props.setProperty("mail.smtp.socketFactory.port", "465");    
          props.put("mail.smtp.auth", "true");    
          final String username = "yourusername";    
          final String password = "yourpassword";    
         Session session = Session.getDefaultInstance(props, new Authenticator(){    
              protected PasswordAuthentication getPasswordAuthentication() {    
                  return new PasswordAuthentication(username, password);    
              }});    
    
               // -- Create a new message --    
         Message msg = new MimeMessage(session);    
    
         // -- Set the FROM and TO fields --    
         msg.setFrom(new InternetAddress(username + "@qq.com"));    
          msg.setRecipients(Message.RecipientType.TO,    
           InternetAddress.parse("yourusername@qq.com",false));    
          msg.setSubject("Hello");    
          msg.setText("How are you");    
         msg.setSentDate(new Date());    
          Transport.send(msg);    
    
          System.out.println("Message sent.");    
         }    
        }

### 接收邮件核心代码 ###

import java.io.UnsupportedEncodingException;    
        import java.security.*;    
        import java.util.Properties;    
        import javax.mail.*;    
        import javax.mail.internet.InternetAddress;    
        import javax.mail.internet.MimeUtility;    
    
       /**    
        * 用于收取Gmail邮件    
         * @author Winter Lau    
        */    
       public class GmailFetch {
            
    
        public static void main(String argv[]) throws Exception {    
    
          Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());    
         final String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";    
    
          // Get a Properties object    
          Properties props = System.getProperties();    
          props.setProperty("mail.pop3.socketFactory.class", SSL_FACTORY);    
         props.setProperty("mail.pop3.socketFactory.fallback", "false");    
          props.setProperty("mail.pop3.port", "995");    
          props.setProperty("mail.pop3.socketFactory.port", "995");    
    
          //以下步骤跟一般的JavaMail操作相同    
          Session session = Session.getDefaultInstance(props,null);    
    
         //请将红色部分对应替换成你的邮箱帐号和密码    
         URLName urln = new URLName("pop3","pop.qq.com",995,null,    
           "yourusername@qq.com", "yourpassword");    
        Store store = session.getStore(urln);    
          Folder inbox = null;    
          try {    
           store.connect();    
           inbox = store.getFolder("INBOX");    
           inbox.open(Folder.READ_ONLY);    
           FetchProfile profile = new FetchProfile();    
           profile.add(FetchProfile.Item.ENVELOPE);    
           Message[] messages = inbox.getMessages();    
          inbox.fetch(messages, profile);    
           System.out.println("收件箱的邮件数：" + messages.length);    
           for (int i = 0; i < messages.length; i++) {    
           //邮件发送者    
           String from = decodeText(messages[i].getFrom()[0].toString());    
            InternetAddress ia = new InternetAddress(from);    
           System.out.println("FROM:" + ia.getPersonal()+'('+ia.getAddress()+')');    
            //邮件标题    
            System.out.println("TITLE:" + messages[i].getSubject());    
            //邮件大小    
            System.out.println("SIZE:" + messages[i].getSize());    
            //邮件发送时间    
            System.out.println("DATE:" + messages[i].getSentDate());    
           }    
          } finally {    
           try {    
            inbox.close(false);    
          } catch (Exception e) {}    
          try {    
            store.close();    
           } catch (Exception e) {}    
          }    
         }    
    
        protected static String decodeText(String text)    
           throws UnsupportedEncodingException {    
          if (text == null)    
           return null;    
         if (text.startsWith("=?GB") || text.startsWith("=?gb"))    
          text = MimeUtility.decodeText(text);    
         else    
          text = new String(text.getBytes("ISO8859_1"));    
         return text;    
        }    
    
       }

### 注意，接收邮件使用java客户端时可以正常得到数据，在使用安卓的时候，就会卡在store.connect(),原因不详，无法解决 ###

### 问题已解决，安卓似乎强行并不允许连接网络的操作在主线程中，将store.connnect()放到子线程中即可，不然会卡住 ###

### 注意，发邮件时，要导入activation.jar,不然的话会报java.lang.noClassDefFoundError:javax.activation.DataHandler ###

### 最后完成版本 ###

### 主界面 ###

package com.zj.myemail;
    
    
    
    import android.annotation.SuppressLint;
    import android.app.Activity;
    import android.app.AlertDialog;
    import android.app.AlertDialog.Builder;
    import android.content.ContentValues;
    import android.content.DialogInterface;
    import android.content.Intent;
    import android.content.DialogInterface.OnClickListener;
    import android.net.Uri;
    import android.os.Bundle;
    import android.view.KeyEvent;
    import android.view.Menu;
    import android.view.MenuItem;
    import android.view.View;
    import android.view.ViewGroup;
    import android.view.Window;
    import android.widget.BaseExpandableListAdapter;
    import android.widget.EditText;
    import android.widget.ExpandableListView;
    import android.widget.ImageView;
    import android.widget.TextView;
    import android.widget.Toast;
    import android.widget.ExpandableListView.OnChildClickListener;
    import android.widget.ExpandableListView.OnGroupClickListener;
    
    public class MainActivity extends Activity {
        
    
        private ExpandableListView expendView;
        private int []group_click=new int[5];
        private long mExitTime=0;
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            requestWindowFeature(Window.FEATURE_NO_TITLE);
            setContentView(R.layout.activity_main);
             final MyExpendAdapter adapter=new MyExpendAdapter();
    
            expendView=(ExpandableListView) findViewById(R.id.list);
            expendView.setGroupIndicator(null);  //设置默认图标不显示
            expendView.setAdapter(adapter);
    
            //一级点击事件
            expendView.setOnGroupClickListener(new OnGroupClickListener() {
                @Override
                public boolean onGroupClick(ExpandableListView parent, View v,
                        int groupPosition, long id) {
    
                    group_click[groupPosition]+=1;
                    adapter.notifyDataSetChanged();
                    return false;
                }
            });
    
            //二级点击事件
            expendView.setOnChildClickListener(new OnChildClickListener() { 
                @Override
                public boolean onChildClick(ExpandableListView parent, View v,
                        int groupPosition, int childPosition, long id) {
                    //可在这里做点击事件
                    if(groupPosition==0&&childPosition==1){
                        /*AlertDialog.Builder builder=new Builder(MainActivity.this);
                        builder.setTitle("添加联系人");
    
                        View view=getLayoutInflater().inflate(R.layout.email_add_address, null);
                        final EditText name=(EditText) view.findViewById(R.id.name);
                        final EditText addr=(EditText) view.findViewById(R.id.address);
    
                        builder.setView(view);
                        builder.setPositiveButton("确定", new OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                insertAddress(name.getText().toString().trim(),addr.getText().toString().trim());
                            }
                        });
                        builder.setNegativeButton("取消", null);
                        builder.show();*/
                    }else if(groupPosition==0&&childPosition==0){
                        //Intent intent=new Intent(MainActivity.this, MailConstactsActivity.class);
                        //startActivity(intent);
                    }else if(groupPosition==1&&childPosition==0){
                        Intent intent=new Intent(MainActivity.this, MailEditActivity.class);
                        startActivity(intent);
                    }else if(groupPosition==1&&childPosition==1){
                        //Intent intent=new Intent(MainActivity.this, MailCaogaoxiangActivity.class);
                        //startActivity(intent);
                    }else if(groupPosition==2&&childPosition==0){
                        Intent intent=new Intent(MainActivity.this, MailBoxActivity.class);
                        intent.putExtra("TYPE", "INBOX");
                        intent.putExtra("status", 0);//全部
                        startActivity(intent);
                    }else if(groupPosition==2&&childPosition==1){
                        //Intent intent=new Intent(MainActivity.this, MailBoxActivity.class);
                        //intent.putExtra("TYPE", "INBOX");
                        //intent.putExtra("status", 1);//未读
                        //startActivity(intent);
                    }else if(groupPosition==2&&childPosition==2){
                        //Intent intent=new Intent(MainActivity.this, MailBoxActivity.class);
                        //intent.putExtra("TYPE", "INBOX");
                        //intent.putExtra("status", 2);//已读
                        //startActivity(intent);
                    }
                    adapter.notifyDataSetChanged();
                    return false;
                }
            });
    
        }
    
        /**
         * 添加联系人
         */
        /*private void insertAddress(String user,String address){
            if(user==null){
                Toast.makeText(HomeActivity.this, "用户名不能为空", Toast.LENGTH_SHORT).show();
            }else{
                if(!EmailFormatUtil.emailFormat(address)){
                    Toast.makeText(HomeActivity.this, "邮箱格式不正确", Toast.LENGTH_SHORT).show();
                }else{
                    Uri uri=Uri.parse("content://com.emailconstantprovider");
                    ContentValues values=new ContentValues();
                    values.put("mailfrom", MyApplication.info.getUserName());
                    values.put("name", user);
                    values.put("address", address);
                    getContentResolver().insert(uri, values);
    
                    Toast.makeText(HomeActivity.this, "添加数据成功", Toast.LENGTH_SHORT).show();
                }
            }
    
    
        }*/
    
        /**
         * 适配器
         * @author Administrator
         *
         */
        private class MyExpendAdapter extends BaseExpandableListAdapter{
        
    
            /**
             * pic state
             */
            //int []group_state=new int[]{R.drawable.group_right,R.drawable.group_down};
    
            /**
             * group title
             */
            String []group_title=new String[]{
       "联系人","写邮件","收件箱"};
    
            /**
             * child text
             */
            String [][] child_text=new String [][]{
                    {
       "联系人列表","添加联系人"},
                    {
       "新邮件","草稿箱"},
                    {
       "全部邮件","未读邮件","已读邮件"},};
            int [][] child_icons=new int[][]{
                    {R.drawable.listlianxiren,R.drawable.tianjia},
                    {R.drawable.xieyoujian,R.drawable.caogaoxiang},
                    {R.drawable.all,R.drawable.notread,R.drawable.hasread},
            };
    
            /**
             * 获取一级标签中二级标签的内容
             */
            @Override
            public Object getChild(int groupPosition, int childPosition) {
                return child_text[groupPosition][childPosition];
            }
    
            /**
             * 获取二级标签ID
             */
            @Override
            public long getChildId(int groupPosition, int childPosition) {
                return childPosition;
            }
            /**
             * 对一级标签下的二级标签进行设置
             */
            @SuppressLint("SimpleDateFormat")
            @Override
            public View getChildView(int groupPosition, int childPosition,
                    boolean isLastChild, View convertView, ViewGroup parent) {
                convertView=getLayoutInflater().inflate(R.layout.email_child, null);
                TextView tv=(TextView) convertView.findViewById(R.id.tv);
                tv.setText(child_text[groupPosition][childPosition]);
    
                ImageView iv=(ImageView) convertView.findViewById(R.id.child_icon);
                iv.setImageResource(child_icons[groupPosition][childPosition]);
                return convertView;
            }
    
            /**
             * 一级标签下二级标签的数量
             */
            @Override
            public int getChildrenCount(int groupPosition) {
                return child_text[groupPosition].length;
            }
    
            /**
             * 获取一级标签内容
             */
            @Override
            public Object getGroup(int groupPosition) {
                return group_title[groupPosition];
            }
    
            /**
             * 一级标签总数
             */
            @Override
            public int getGroupCount() {
                return group_title.length;
            }
    
            /**
             * 一级标签ID
             */
            @Override
            public long getGroupId(int groupPosition) {
                return groupPosition;
            }
            /**
             * 对一级标签进行设置
             */
            @Override
            public View getGroupView(int groupPosition, boolean isExpanded,
                    View convertView, ViewGroup parent) {
                convertView=getLayoutInflater().inflate(R.layout.email_group, null);
    
                ImageView icon=(ImageView) convertView.findViewById(R.id.icon);
                ImageView iv=(ImageView) convertView.findViewById(R.id.iv);
                TextView tv=(TextView) convertView.findViewById(R.id.iv_title);
    
                iv.setImageResource(R.drawable.group_right);
                tv.setText(group_title[groupPosition]);
    
                if(groupPosition==0){
                    icon.setImageResource(R.drawable.constants);
                }else if(groupPosition==1){
                    icon.setImageResource(R.drawable.mailto);
                }else if(groupPosition==2){
                    icon.setImageResource(R.drawable.mailbox);
                }
    
                if(group_click[groupPosition]%2==0){
                    iv.setImageResource(R.drawable.group_right);
                }else{
                    iv.setImageResource(R.drawable.group_down);
                }
    
    
                return convertView;
            }
            /**
             * 指定位置相应的组视图
             */
            @Override
            public boolean hasStableIds() {
                return true;
            }
    
            /**
             *  当选择子节点的时候，调用该方法
             */
            @Override
            public boolean isChildSelectable(int groupPosition, int childPosition) {
                return true;
            }
    
        }
    
        /**
         * 返回退出系统
         */
        @Override
        public boolean onKeyDown(int keyCode, KeyEvent event) {
            if(keyCode==KeyEvent.KEYCODE_BACK){
                if((System.currentTimeMillis()-mExitTime)<2000){
                    android.os.Process.killProcess(android.os.Process.myPid());
                }else{
                    Toast.makeText(MainActivity.this, "再按一次退出程序", Toast.LENGTH_SHORT).show();
                    mExitTime=System.currentTimeMillis();
                }
                return true;
            }
            return super.onKeyDown(keyCode, event);
        }
    }

### 收件箱 ###

package com.zj.myemail;
    
    import android.app.Activity;
    import android.app.ProgressDialog;
    import android.content.ContentValues;
    import android.content.Context;
    import android.content.Intent;
    import android.database.Cursor;
    import android.net.Uri;
    import android.os.Bundle;
    import android.os.Handler;
    
    import android.util.Log;
    import android.view.LayoutInflater;
    import android.view.View;
    import android.view.View.OnClickListener;
    import android.view.ViewGroup;
    import android.view.Window;
    import android.widget.BaseAdapter;
    import android.widget.DialerFilter;
    import android.widget.ListView;
    import android.widget.ProgressBar;
    import android.widget.TextView;
    import android.widget.Toast;
    
    import java.io.InputStream;
    import java.io.UnsupportedEncodingException;
    import java.lang.ref.WeakReference;
    import java.security.Security;
    import java.util.ArrayList;
    import java.util.List;
    import java.util.Properties;
    
    import javax.mail.FetchProfile;
    import javax.mail.Folder;
    import javax.mail.Message;
    import javax.mail.Session;
    import javax.mail.Store;
    import javax.mail.URLName;
    import javax.mail.internet.InternetAddress;
    import javax.mail.internet.MimeUtility;
    
    
    
    public class MailBoxActivity extends Activity {
        
    
        private ArrayList<Email> mailslist = new ArrayList<Email>();
        private ArrayList<ArrayList<InputStream>> attachmentsInputStreamsList = new ArrayList<ArrayList<InputStream>>();
        private String type;
        private int status;
        private MyAdapter myAdapter;
        private ListView lv_box;
        //private List<MailReceiver> mailReceivers;
        private ProgressDialog dialog;
    
        private List<String> messageids;
        private Handler handler=new Handler(){
            public void handleMessage(android.os.Message msg) {
                dialog.dismiss();
    
                 myAdapter = new MyAdapter();
                 lv_box.setAdapter(myAdapter);
            };
    
        };
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            requestWindowFeature(Window.FEATURE_NO_TITLE);
            super.onCreate(savedInstanceState);
    
    
            setContentView(R.layout.email_mailbox);
            initView();
    
        }
    
        private void initView() {
            lv_box = (ListView) findViewById(R.id.lv_box);
    
    
            dialog=new ProgressDialog(this);
            dialog.setMessage("正加载");
            dialog.show();
    
    
            Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());    
             final String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";    
    
              // Get a Properties object    
              Properties props = System.getProperties();    
              props.setProperty("mail.pop3.socketFactory.class", SSL_FACTORY);    
             props.setProperty("mail.pop3.socketFactory.fallback", "false");    
              props.setProperty("mail.pop3.port", "995");    
              props.setProperty("mail.pop3.socketFactory.port", "995");    
    
              //以下步骤跟一般的JavaMail操作相同    
              final Session session = Session.getDefaultInstance(props,null);    
    
             //请将红色部分对应替换成你的邮箱帐号和密码    
             final URLName urln = new URLName("pop3","pop.qq.com",995,null,    
               "yourusername@qq.com", "yourpassword");   
    
    
    
             new Thread(new Runnable() {
    
                @Override
                public void run() {
                    // TODO Auto-generated method stub
                     Store store=null;
                      Folder inbox = null; 
                    try { 
    
                         store = session.getStore(urln);    
    
                         Log.i("test","here1");
                           store.connect();    
                           Log.i("test","here2");
                           inbox = store.getFolder("INBOX");    
                           inbox.open(Folder.READ_ONLY);    
                           FetchProfile profile = new FetchProfile();    
                           profile.add(FetchProfile.Item.ENVELOPE);    
                           Message[] messages = inbox.getMessages();    
                          inbox.fetch(messages, profile);  
                          Log.i("test",messages.length+"");
                           System.out.println("收件箱的邮件数：" + messages.length);    
                           for (int i = 0; i < messages.length; i++) {    
                           //邮件发送者    
                           String from = decodeText(messages[i].getFrom()[0].toString());    
                            InternetAddress ia = new InternetAddress(from);    
                           System.out.println("FROM:" + ia.getPersonal()+'('+ia.getAddress()+')');    
                            //邮件标题    
                            System.out.println("TITLE:" + messages[i].getSubject());    
                            //邮件大小    
                            System.out.println("SIZE:" + messages[i].getSize());    
                            //邮件发送时间    
                            System.out.println("DATE:" + messages[i].getSentDate());   
                            Email email=new Email();
                            email.setFrom(ia.getPersonal()+'('+ia.getAddress()+')');
                            email.setSubject( messages[i].getSubject());
                            email.setSentdata(messages[i].getSentDate()+"");
    
                           mailslist.add(email);
    
                           }    
    
                           handler.sendEmptyMessage(0);
                          } catch(Exception e)
                          {
    
                          }
                          finally {    
                           try {    
                            inbox.close(false);    
                          } catch (Exception e) {}    
                          try {    
                            store.close();    
                           } catch (Exception e) {}    
                          }  
                }
            }).start();
    
        }
    
        protected static String decodeText(String text)    
                   throws UnsupportedEncodingException {    
                  if (text == null)    
                   return null;    
                 if (text.startsWith("=?GB") || text.startsWith("=?gb"))    
                  text = MimeUtility.decodeText(text);    
                 else    
                  text = new String(text.getBytes("ISO8859_1"));    
                 return text;    
                }    
    
    
    
        /**
         * 适配器
         * @author Administrator
         *
         */
        private class MyAdapter extends BaseAdapter {
        
            @Override
            public int getCount() {
                return mailslist.size();
            }
    
            @Override
            public Object getItem(int position) {
                return mailslist.get(position);
            }
    
            @Override
            public long getItemId(int position) {
                return position;
            }
    
            @Override
            public View getView(final int position, View convertView, ViewGroup parent) {
                convertView = LayoutInflater.from(MailBoxActivity.this).inflate(R.layout.email_mailbox_item, null);
    
                TextView tv_from = (TextView) convertView.findViewById(R.id.tv_from);
                tv_from.setText(mailslist.get(position).getFrom());
    
                TextView tv_sentdate = (TextView) convertView.findViewById(R.id.tv_sentdate);
                tv_sentdate.setText(mailslist.get(position).getSentdata());
    
                TextView tv_subject = (TextView) convertView.findViewById(R.id.tv_subject);
                tv_subject.setText(mailslist.get(position).getSubject());
    
                return convertView;
            }
    
        }
    
    
    
    }

### 发送邮件 ###

package com.zj.myemail;
    
    import java.security.Security;
    import java.util.Date;
    import java.util.Properties;
    
    import javax.mail.Authenticator;
    import javax.mail.Message;
    import javax.mail.MessagingException;
    import javax.mail.PasswordAuthentication;
    import javax.mail.Session;
    import javax.mail.Transport;
    import javax.mail.internet.InternetAddress;
    import javax.mail.internet.MimeMessage;
    
    import android.app.Activity;
    import android.app.ProgressDialog;
    import android.os.Bundle;
    import android.os.Handler;
    import android.view.KeyEvent;
    import android.view.View;
    import android.view.Window;
    import android.widget.Button;
    import android.widget.EditText;
    import android.widget.ImageButton;
    import android.widget.Toast;
    
    
    
    
    
    public class MailEditActivity extends Activity {
        
        private EditText mail_to;
        private EditText mail_from;
        private EditText mail_topic;
        private EditText mail_content;
    
        private Button send;
        private ImageButton add_lianxiren;
        private ImageButton attachment;
    
    
        private int mailid = -1;
    
        private static final int SUCCESS = 1;
        private static final int FAILED = -1;
        private boolean isCaogaoxiang = true;
        private ProgressDialog dialog;
    
        Handler handler = new Handler() {
    
            public void handleMessage(android.os.Message msg) {
                dialog.dismiss();
                Toast.makeText(MailEditActivity.this, "发送成功", 0).show();
            };
        };
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            requestWindowFeature(Window.FEATURE_NO_TITLE);
            super.onCreate(savedInstanceState);
            setContentView(R.layout.email_writer);
            init();
        }
    
        /**
         * 初始化
         */
        private void init() {
            mail_to = (EditText) findViewById(R.id.mail_to);
            mail_from = (EditText) findViewById(R.id.mail_from);
            mail_topic = (EditText) findViewById(R.id.mail_topic);
            mail_content = (EditText) findViewById(R.id.content);
            send = (Button) findViewById(R.id.send);
            attachment = (ImageButton) findViewById(R.id.add_att);
            add_lianxiren = (ImageButton) findViewById(R.id.add_lianxiren);
    
            mail_from.setText("yourusername@qq.com");
            mail_to.setText("yourusername@qq.com");
    
        }
    
        public void mySend(View view) {
            Toast.makeText(getApplicationContext(), "正在发送", 0).show();
            sendMail();
        }
    
        /**
         * 设置邮件数据
         */
        private void sendMail() {
    
            dialog = new ProgressDialog(this);
            dialog.setMessage("正在发送");
            dialog.show();
            new Thread(new Runnable() {
    
                @Override
                public void run() {
                    // TODO Auto-generated method stub
                    try {
                        Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());
                        final String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";
                        // Get a Properties object
                        Properties props = System.getProperties();
                        props.setProperty("mail.smtp.host", "smtp.qq.com");
                        props.setProperty("mail.smtp.socketFactory.class",
                                SSL_FACTORY);
                        props.setProperty("mail.smtp.socketFactory.fallback",
                                "false");
                        props.setProperty("mail.smtp.port", "465");
                        props.setProperty("mail.smtp.socketFactory.port", "465");
                        props.put("mail.smtp.auth", "true");
                        final String username = "yourusername";
                        final String password = "yourpassword";
                        Session session = Session.getDefaultInstance(props,
                                new Authenticator() {
                                    protected PasswordAuthentication getPasswordAuthentication() {
                                        return new PasswordAuthentication(username,
                                                password);
                                    }
                                });
    
                        // -- Create a new message --
                        final Message msg = new MimeMessage(session);
    
                        // -- Set the FROM and TO fields --
                        msg.setFrom(new InternetAddress(username + "@qq.com"));
    
                        msg.setRecipient(Message.RecipientType.TO, new InternetAddress(mail_to.getText().toString()));
                        msg.setSubject(mail_topic.getText().toString());
                        msg.setText(mail_content.getText().toString());
                        msg.setSentDate(new Date());
    
                        Transport.send(msg);
                        handler.sendEmptyMessage(0);
                    } catch (MessagingException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
    
                }
            }).start();
    
            System.out.println("Message sent.");
    
        }
    
        /**
         * /** 返回
         * 
         * @param v
         */
        public void back(View v) {
            finish();
    
        }
    
        /**
         * 返回按钮
         */
        @Override
        public boolean onKeyDown(int keyCode, KeyEvent event) {
            finish();
            return super.onKeyDown(keyCode, event);
        }
    
    }

### 完成,以下为另外的例子 ###

### 详细实例 ###

### 准备过程 ###

1.  下载jar包
2.  在QQ邮箱中手动开启SMTP，POP3

### 参考链接 ###

[QQ邮箱开启SMTP服务的步骤\_百度经验][QQ_SMTP]

### 实现 ###

### 登陆与验证 ###

### 登陆界面，主要是两个输入框 ###

package com.email;
    import com.email.app.MyApplication;
    import com.email.utils.EmailFormatUtil;
    import com.email.utils.HttpUtil;
    
    import android.os.Bundle;
    import android.os.Handler;
    import android.os.Message;
    import android.text.Editable;
    import android.text.TextUtils;
    import android.text.TextWatcher;
    import android.view.View;
    import android.view.Window;
    import android.view.View.OnClickListener;
    import android.widget.Button;
    import android.widget.CheckBox;
    import android.widget.CompoundButton;
    import android.widget.CompoundButton.OnCheckedChangeListener;
    import android.widget.EditText;
    import android.widget.Toast;
    import android.app.Activity;
    import android.app.ProgressDialog;
    import android.content.Context;
    import android.content.Intent;
    import android.content.SharedPreferences;
    public class LoginActivity extends Activity implements TextWatcher, OnClickListener{
        
        private EditText emailAddress;
        private EditText password;
        private Button clearAddress;
        private Button emailLogin;
        private ProgressDialog dialog;
        private SharedPreferences sp;
        private CheckBox cb_remenber;
        private CheckBox cb_autologin;
        private Handler handler=new Handler(){
            @Override
            public void handleMessage(Message msg) {
                if(MyApplication.session==null){
                    dialog.dismiss();
                    Toast.makeText(LoginActivity.this, "账号或密码错误", Toast.LENGTH_SHORT).show();
                }else{
                    dialog.dismiss();
                    Intent intent=new Intent(LoginActivity.this, HomeActivity.class);
                    startActivity(intent);
                    finish();
                    //Toast.makeText(LoginActivity.this, "登入成功", Toast.LENGTH_SHORT).show();
                }
                super.handleMessage(msg);
            }
    
        };
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            requestWindowFeature(Window.FEATURE_NO_TITLE);
            setContentView(R.layout.email_login);
            sp=getSharedPreferences("config", Context.MODE_APPEND);
            initView();
            isRemenberPwd();
        }
    
        /**
         * 初始化数据
         */
        private void initView(){
            emailAddress=(EditText) findViewById(R.id.emailAddress);
            password=(EditText) findViewById(R.id.password);
            clearAddress=(Button) findViewById(R.id.clear_address);
            emailLogin=(Button) findViewById(R.id.login_btn);
            cb_remenber=(CheckBox) findViewById(R.id.remenberPassword);
            cb_autologin=(CheckBox) findViewById(R.id.autoLogin);
    
            clearAddress.setOnClickListener(this);
            emailAddress.addTextChangedListener(this);
            emailLogin.setOnClickListener(this);
    
            cb_remenber.setOnClickListener(this);
            cb_autologin.setOnClickListener(this);
    
        }
    
        @Override
        public void onClick(View v) {
            switch (v.getId()) {
            case R.id.clear_address:
                emailAddress.setText("");
                break;
            case R.id.login_btn:
                loginEmail();
                break;
            case R.id.remenberPassword:
                remenberPwd();
                break;
            case R.id.autoLogin:
                break;
            }
        }
    
        /**
         * 是否记住密码
         */
        private void isRemenberPwd(){
            boolean isRbPwd=sp.getBoolean("isRbPwd", false);
            if(isRbPwd){
                String addr=sp.getString("address", "");
                String pwd=sp.getString("password", "");
                emailAddress.setText(addr);
                password.setText(pwd);
                cb_remenber.setChecked(true);
            }
        }
    
        /**
         * 记住密码
         */
        private void remenberPwd(){
            boolean isRbPwd=sp.getBoolean("isRbPwd", false);
            if(isRbPwd){
                sp.edit().putBoolean("isRbPwd", false).commit();
                cb_remenber.setChecked(false);
            }else{
                sp.edit().putBoolean("isRbPwd", true).commit();
                sp.edit().putString("address", emailAddress.getText().toString().trim()).commit();
                sp.edit().putString("password", password.getText().toString().trim()).commit();
                cb_remenber.setChecked(true);
    
            }
        }
    
        /**
         * 登入邮箱
         */
        private void loginEmail(){
            String address=emailAddress.getText().toString().trim();
            String pwd=password.getText().toString().trim();
            if(TextUtils.isEmpty(address)){
                Toast.makeText(LoginActivity.this, "地址不能为空", Toast.LENGTH_SHORT).show();
                return;
            }else{
                if(TextUtils.isEmpty(pwd)){
                    Toast.makeText(LoginActivity.this, "密码不能为空", Toast.LENGTH_SHORT).show();
                    return;
                }
            }
            /**
             * 校验邮箱格式
             */
            if(!EmailFormatUtil.emailFormat(address)){
                Toast.makeText(LoginActivity.this, "邮箱格式不正确", Toast.LENGTH_SHORT).show();
            }else{
                String host="smtp."+address.substring(address.lastIndexOf("@")+1);
                MyApplication.info.setMailServerHost(host);
                MyApplication.info.setMailServerPort("465");
                MyApplication.info.setUserName(address);
                MyApplication.info.setPassword(pwd);
                MyApplication.info.setValidate(true);
    
                /**
                 * 进度条
                 */
                dialog=new ProgressDialog(LoginActivity.this);
                dialog.setMessage("正在登入，请稍后");
                dialog.show();
    
                /**
                 * 访问网络
                 */
                new Thread(){
                    @Override
                    public void run() {     
                        //登入操作
                        HttpUtil util=new HttpUtil();
                        MyApplication.session=util.login();
                        Message message=handler.obtainMessage();
                        message.sendToTarget();
                    }
    
                }.start();
            }
        }
    
    
            /**
             * 文本监听事件
             * 
             */
            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                    if(!TextUtils.isEmpty(s)){
                        clearAddress.setVisibility(View.VISIBLE);
                    }else{
                        clearAddress.setVisibility(View.INVISIBLE);
                    }
    
            }
    
        @Override
        public void afterTextChanged(Editable s) {
    
        }
    
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count,
                int after) {
    
        }
    
    
    }

### 点击登陆会跳转到此处，HttpUtils如下 ，主要包括验证是否成功登陆与发送消息的方法， ###

其中创建了一个密码验证器，并且根据邮件会话属性和密码验证器构造一个发送邮件的session

package com.email.utils;
    import java.io.UnsupportedEncodingException;
    import java.util.Date;
    import java.util.List;
    
    import javax.activation.CommandMap;
    import javax.activation.DataHandler;
    import javax.activation.FileDataSource;
    import javax.activation.MailcapCommandMap;
    import javax.mail.Address;
    import javax.mail.BodyPart;
    import javax.mail.Message;
    import javax.mail.MessagingException;
    import javax.mail.Multipart;
    import javax.mail.Session;
    import javax.mail.Store;
    import javax.mail.Transport;
    import javax.mail.internet.InternetAddress;
    import javax.mail.internet.MimeBodyPart;
    import javax.mail.internet.MimeMessage;
    import javax.mail.internet.MimeMultipart;
    import javax.mail.internet.MimeUtility;
    import com.email.app.MyApplication;
    import com.email.bean.Attachment;
    import com.email.bean.MailInfo;
    import com.email.bean.MyAuthenticator;
    public class HttpUtil {
        
        /**
         * 连接邮箱
         * @param info
         * @return
         */
        public Session login(){
            //连接服务器
            Session session=isLoginRight(MyApplication.info);
            return session;
        }
    
        /**
         * 登入操作
         * @param info
         * @return
         */
        private Session isLoginRight(MailInfo info) {
            //判断是否要登入验证
            MyAuthenticator authenticator=null;
            if(info.isValidate()){
                //创建一个密码验证器
                authenticator=new MyAuthenticator(info.getUserName(), info.getPassword());
            }
            // 根据邮件会话属性和密码验证器构造一个发送邮件的session
            Session sendMailSession=Session.getDefaultInstance(info.getProperties(), authenticator);
            try {
                Transport transport=sendMailSession.getTransport("smtp");
                transport.connect(info.getMailServerHost(), info.getUserName(), info.getPassword());
            } catch (MessagingException e) {
                e.printStackTrace();
                return null;
            }
            return sendMailSession;
        }
    
        /**
         * 以文本格式发送邮件
         * 
         * @param <T>
         * 
         * @param mailInfo
         *            待发送的邮件的信息
         */
        public boolean sendTextMail(MailInfo mailInfo, Session sendMailSession) {
            // 判断是否需要身份认证
            try {
                // 根据session创建一个邮件消息
                Message mailMessage = new MimeMessage(sendMailSession);
                // 创建邮件发送者地址
                Address address=new InternetAddress(mailInfo.getFromAddress());
                // 设置邮件消息的发送者
                mailMessage.setFrom(address);
                // 创建邮件的接收者地址，并设置到邮件消息中
                Address[] tos = null;
                String[] receivers = mailInfo.getReceivers();
                if (receivers != null) {
                    // 为每个邮件接收者创建一个地址
                    tos = new InternetAddress[receivers.length];
                    for (int i = 0; i < receivers.length; i++) {
                        tos[i] = new InternetAddress(receivers[i]);
                    }
                } else {
                    return false;
                }
                // Message.RecipientType.TO属性表示接收者的类型为TO
                mailMessage.setRecipients(Message.RecipientType.TO, tos);
                // 设置邮件消息的主题
                mailMessage.setSubject(mailInfo.getSubject());
                // 设置邮件消息发送的时间
                mailMessage.setSentDate(new Date());
                // 设置邮件消息的主要内容
                String mailContent = mailInfo.getContent();
    
                Multipart mm = new MimeMultipart();// 新建一个MimeMultipart对象用来存放多个BodyPart对象
                // 设置信件文本内容
                BodyPart mdp = new MimeBodyPart();// 新建一个存放信件内容的BodyPart对象
                mdp.setContent(mailContent, "text/html;charset=gb2312");// 给BodyPart对象设置内容和格式/编码方式
                mm.addBodyPart(mdp);// 将含有信件内容的BodyPart加入到MimeMultipart对象中
    
                Attachment affInfos;
                FileDataSource fds1;
                List<Attachment> list = mailInfo.getAttachmentInfos();
                    for (int i = 0; i < list.size(); i++) {
                        affInfos = list.get(i);
                        fds1 = new FileDataSource(affInfos.getFilePath());
                        mdp = new MimeBodyPart();
                        mdp.setDataHandler(new DataHandler(fds1));
                        try {
                            mdp.setFileName(MimeUtility.encodeText(fds1.getName()));
                        } catch (UnsupportedEncodingException e) {
                            e.printStackTrace();
                        }
                        mm.addBodyPart(mdp);
                    }
                mailMessage.setContent(mm);
                mailMessage.saveChanges();
    
    
                // 设置邮件支持多种格式
                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);
    
                // 发送邮件
                Transport.send(mailMessage);
                return true;
            } catch (MessagingException ex) {
                ex.printStackTrace();
            }
            return false;
        }
    }

#### HttpUtils中用到了MailInfo中一些属性，MailInfo是邮件基本信息javabean,其中配置了邮件会话属性，和其他一些属性，内容如下 ####

由于现在是SSL方法验证，似乎都要加上

p.put("mail.smtp.starttls.enable", "true");
            //需要加上
            p.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
            p.put("mail.smtp.socketFactory.port", "465");

刚开始没加就出错了

package com.email.bean;
    
    import java.io.Serializable;
    import java.util.List;
    import java.util.Properties;
    
    /**
     * 邮件的基本信息
     * @author Administrator
     *
     */
    public class MailInfo implements Serializable {
        
        private static final long serialVersionUID = 1L;
        // 发送邮件的服务器的IP和端口
        private String mailServerHost;
        private String mailServerPort = "465";
        // 登陆邮件发送服务器的用户名和密码
        private String userName;
        private String password;
        // 是否需要身份验证
        private boolean validate = false;
        // 邮件发送者的地址
        private String fromAddress;
        // 邮件主题
        private String subject;
        // 邮件的文本内容
        private String content;
        // 邮件附件的路径
        private List<Attachment> attachmentInfos;
        // 邮件的接收者，可以有多个
        private String[] receivers;
    
        /**
         * 获得邮件会话属性
         */
        public Properties getProperties() {
            Properties p = new Properties();
            p.put("mail.smtp.host", this.mailServerHost);
            p.put("mail.smtp.port", this.mailServerPort);
            p.put("mail.smtp.auth", validate ? "true" : "false");
    
            p.put("mail.smtp.starttls.enable", "true");
            //需要加上
            p.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
            p.put("mail.smtp.socketFactory.port", "465");
    
    
    
    
            return p;
        }
    
        public String[] getReceivers() {
            return receivers;
        }
    
        public void setReceivers(String[] receivers) {
            this.receivers = receivers;
        }
    
        public String getMailServerHost() {
            return mailServerHost;
        }
    
        public void setMailServerHost(String mailServerHost) {
            this.mailServerHost = mailServerHost;
        }
    
        public String getMailServerPort() {
            return mailServerPort;
        }
    
        public void setMailServerPort(String mailServerPort) {
            this.mailServerPort = mailServerPort;
        }
    
        public boolean isValidate() {
            return validate;
        }
    
        public void setValidate(boolean validate) {
            this.validate = validate;
        }
    
    
        public List<Attachment> getAttachmentInfos() {
            return attachmentInfos;
        }
    
        public void setAttachmentInfos(List<Attachment> attachmentInfos) {
            this.attachmentInfos = attachmentInfos;
        }
    
    
    
        public String getFromAddress() {
            return fromAddress;
        }
    
        public void setFromAddress(String fromAddress) {
            this.fromAddress = fromAddress;
        }
    
        public String getPassword() {
            return password;
        }
    
        public void setPassword(String password) {
            this.password = password;
        }
    
        public String getUserName() {
            return userName;
        }
    
        public void setUserName(String userName) {
            this.userName = userName;
        }
    
        public String getSubject() {
            return subject;
        }
    
        public void setSubject(String subject) {
            this.subject = subject;
        }
    
        public String getContent() {
            return content;
        }
    
        public void setContent(String textContent) {
            this.content = textContent;
        }
    }

### session是Application中声明的静态全局变量，info也是 ###

package com.email.app;
    import java.io.InputStream;
    import java.util.ArrayList;
    
    import javax.mail.Session;
    import javax.mail.Store;
    
    import com.email.bean.MailInfo;
    
    import android.app.Application;
    
    public class MyApplication extends Application {
        
        public static Session session = null;
        public static Store getStore() {
            return store;
        }
    
        public static void setStore(Store store) {
            MyApplication.store = store;
        }
    
        public static MailInfo info=new MailInfo();
    
        private static Store store;
        private ArrayList<InputStream> attachmentsInputStreams;
    
        public ArrayList<InputStream> getAttachmentsInputStreams() {
            return attachmentsInputStreams;
        }
    
        public void setAttachmentsInputStreams(ArrayList<InputStream> attachmentsInputStreams) {
            this.attachmentsInputStreams = attachmentsInputStreams;
        }
    
    }

### 参考链接： ###

[JavaMail - qw765811529的专栏 - 博客频道 - CSDN.NET][JavaMail - qw765811529_ - _ - CSDN.NET]

### 接收邮箱信息 ###

待续

### 效果如下 ###

![这里写图片描述][20160418210015201]

![这里写图片描述][20160418210026857]

[QQ_SMTP]: http://jingyan.baidu.com/article/0f5fb099dffe7c6d8334ea31.html
[JavaMail - qw765811529_ - _ - CSDN.NET]: http://blog.csdn.net/qw765811529/article/details/50727785
[20160418210015201]: /images/20220724/ef3000826e414a9ebf8ba39687526e9e.png
[20160418210026857]: /images/20220724/9a0b7dbce4ae4c149522e38bb33b0558.png