如何在android studio中为gmail发件人伪装或加密硬编码密码

Question

private Button sendRequest;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_forgot_pass);

    sendRequest = (Button) findViewById(R.id.btn_send);

    sendRequest.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            new Thread(new Runnable() {
                public void run() {
                    try {
                        GMailSender sender = new GMailSender(
                                "[e-mail]",
                                "myPassword");
                        sender.sendMail("Test mail", "This mail has been sent from android app",
                                "[e-mail]",
                                "[e-mail]");
                    } catch (Exception e) {
                        Toast.makeText(getApplicationContext(),"Error",Toast.LENGTH_LONG).show();
                    }
                }
            }).start();
        }
    });
}

}

公共类GMailSender扩展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){
        Log.e("SendMail", e.getMessage(), 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");
    }
}

}

/**根据一个或多个*贡献者许可协议授权给Apache Software Foundation(ASF)。有关版权所有权的更多信息，请参阅与本作品一起分发的通知文件。*ASF根据Apache License,Version 2.0*（“License”）向您许可此文件；除非符合*许可证，否则您不得使用此文件。您可以在**http://www.apache.org/licenses/license-2.0获得许可证副本**除非适用法律要求或书面同意，根据本许可证分发的软件*是在“原样”基础上分发的，*没有任何明示或暗示的保证或条件。*有关管理权限的特定语言和*许可证下的限制，请参阅许可证。*/

导入Java.Security.AccessController导入java.security.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;
        }
    });
}

}