Java 在后台发送电子邮件-Android_Java_Android_Email

Java 在后台发送电子邮件-Android

java android email

Java 在后台发送电子邮件-Android,java,android,email,Java,Android,Email,我有这段代码，两个简单的类：一个邮件发送者和一个只有一个按钮的主要Android活动。这是活动代码： package com.py.spycam; import javax.mail.MessagingException; import javax.mail.NoSuchProviderException; import javax.mail.internet.AddressException; import android.app.Activity; import android.os.Bu

我有这段代码，两个简单的类：一个邮件发送者和一个只有一个按钮的主要Android活动。这是活动代码：

package com.py.spycam;

import javax.mail.MessagingException;
import javax.mail.NoSuchProviderException;
import javax.mail.internet.AddressException;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends Activity {

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }

    public void onClickMail(View v) {
        String[] to = {"toaddress"};
        SMTPMail mail = new SMTPMail("user", "pass");
        try {
            mail.send("sender", to, "prova", "prova bpdy");
            Toast.makeText(this, "Mail sent", Toast.LENGTH_SHORT).show();
        } catch (NoSuchProviderException e) {
            Toast.makeText(this, "Unable to send email (NoSuchProviderException)", Toast.LENGTH_SHORT).show();
        } catch (AddressException e) {
            Toast.makeText(this, "Unable to send email (AddressException)", Toast.LENGTH_SHORT).show();
        } catch (MessagingException e) {
            Toast.makeText(this, "Unable to send email (MessagingException)", Toast.LENGTH_SHORT).show();
        } catch (Exception e) {
            Toast.makeText(this, "Unable to send email (general Exception)", Toast.LENGTH_SHORT).show();
        }

    }

}

这是邮件发送者：

package com.py.spycam;

import java.util.Properties;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.NoSuchProviderException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

public class SMTPMail {
    private String host;
    private String from;
    private String pass;
    private Properties props;

    public SMTPMail(String _user, String _pass) {
        host = "smtp.gmail.com";
        from = _user;
        pass = _pass;
        props = System.getProperties();

        /* Props settings */
        props.put("mail.smtp.starttls.enable", "true"); // added this line
        props.put("mail.smtp.host", host);
        props.put("mail.smtp.user", from);
        props.put("mail.smtp.password", pass);
        props.put("mail.smtp.port", "587");
        props.put("mail.smtp.auth", "true");
    }

    public void send(String from, String[] to, String subject, String body)
            throws AddressException, MessagingException, NoSuchProviderException {
            //throws AddressException, MessagingException {

        Session session = Session.getDefaultInstance(props, null);
        MimeMessage message = new MimeMessage(session);
        message.setFrom(new InternetAddress(from));

        InternetAddress[] toAddress = new InternetAddress[to.length];

        // To get the array of addresses
        for(int i=0; i < to.length; i++ ) { // changed from a while loop
            toAddress[i] = new InternetAddress(to[i]);
        }

        for(int i=0; i < toAddress.length; i++) { // changed from a while loop
            message.addRecipient(Message.RecipientType.TO, toAddress[i]);
        }
        message.setSubject(subject);
        message.setText(body);
        Transport transport = session.getTransport("smtp");
        transport.connect(host, from, pass);
        transport.sendMessage(message, message.getAllRecipients());
        transport.close();
    }


}

非常基本

android线程模型有两条规则

1）不要阻塞主线程。 2）不要从另一个线程操作主（“UI”）线程

您通过对主线程进行网络调用来阻塞主线程，违反了其中的第一条。将发送邮件移动到其他线程。考虑一个简单的线程或一个

另外，请参阅开发人员文档中关于

另外，请注意，您当前似乎已启用，这是一件好事。这会检测到您“不应该做的事情”，例如在主线程上进行网络调用，如果这样做，会抛出异常