android - 如何使用 OAuth2.0 令牌在 android 中以编程方式发送邮件

Question

我正在开发一个应用程序，我想在其中使用 Gmail 凭据以编程方式发送邮件，我知道如何使用AccountManager. 请建议我如何使用带有一些代码或教程的凭据发送邮件。我是安卓新手。请帮助我提前谢谢..

Answer 1

经过非常努力的工作，现在我可以使用 Oauth 2 登录 Google。现在我在这里分享，因为这里有很多问题没有答案。以下步骤是登录 Google 所必需的。

1-使用从您的设备中选择一个帐户

public static AccountManager accountManager;
accountManager = AccountManager.get(this);
Account[] accounts = accountManager.getAccountsByType("com.google");

2-使用从所选帐户获取令牌

private void onAccountSelected(final Account account) {
accountManager.getAuthToken(account, AUTH_TOKEN_TYPE, null, this, new AccountManagerCallback<Bundle>() {
    public void run(AccountManagerFuture<Bundle> future) {
        try {
            String token = future.getResult().getString(AccountManager.KEY_AUTHTOKEN);
            useToken(account, token);
        } catch (OperationCanceledException e) {
            onAccessDenied();
        } catch (Exception e) {
            handleException(e);
        }
    }
}, null);

}

3-现在使用用户帐户和令牌验证令牌。您将能够登录到谷歌。

注意：有时令牌未经授权无法登录，因此您需要使令牌无效。

4-要重新登录，您必须使用使您的令牌无效

accountManager.invalidateAuthToken("com.google", token);

5-无效后，您必须使用获取新令牌

   String newToken = AccountManager.get(this).getAuthToken(new Account(account,        "com.google"),
                 AUTH_TOKEN_TYPE, true, null, null).getResult().getString(AccountManager.KEY_AUTHTOKEN);

6-在你的 AndroidManifest.xml 中添加下面的使用权限

<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.GET_ACCOUNTS"/>
<uses-permission android:name="android.permission.USE_CREDENTIALS"/>

这就是你所需要的，现在享受

Answer 2

 fist you download activation.jar,mail.jar,additionnal.jar and add to built to your project                                                       

And code r following
---------Create GMailSender.class
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 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){
            e.printStackTrace();

        }
    }   

    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");   
        }   
    }   
}  

2-Create JSSEProvider.class
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;
            }
        });
    }
}

3-use This code in to your Activity button click etc..
try {   
                    GMailSender sender = new GMailSender("sender gmail ID", "password");
                    sender.sendMail("This is Subject",   
                            "This is Body",   
                            "receiverID",   
                            "receiverID");   
                } catch (Exception e) {   
                    Log.e("SendMail", e.getMessage(), e);   
                } 

来源： https ://stackoverflow.com/a/2033124/865900 （信用到期）