如何使用 Gmail 帐户从我的应用程序发送电子邮件？
How to send emails from my app using a Gmail account?
我正在尝试从应用程序发送电子邮件。
问题是 Gmail 不允许我进行身份验证，因为位置不寻常 - 当然，每个应用程序都安装在其他位置。
我的代码（使用 Javax）：
Properties props = new Properties();
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.starttls.enable", "true");
props.put("mail.smtp.host", SMTP_SERVER);
props.put("mail.smtp.port", PORT);
Session session = Session.getInstance(props,
new javax.mail.Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(USERNAME, new StringBuilder(PASSWORD).toString());
}
});
该代码在我的测试设备上运行良好，但在其他使用我的应用程序的设备上崩溃。
我得到的错误：
javax.mail.AuthenticationFailedException: 534-5.7.14 请通过 534-5.7.14 登录您的网络浏览器，然后重试。 534-5.7.14 在 534 5.7.14 https://support.google.com/mail/answer/78754 了解更多信息 l9-v6sm11531942wrf.4 - gsmtp
我尝试了所有找到的解决方案，但无济于事。
"Allow less secure apps" 和 "Unlock display catcha" 的解决方案 - 没有帮助
我也尝试打开 2FA 并使用从 google 生成的 AppPassword 进行身份验证 - 没有帮助。
有什么线索吗？
在您的代码中使用 Intents 而不是使用 Properties
Intent emailIntent = new Intent(Intent.ACTION_SEND);
emailIntent.setData(Uri.parse("mailto:"));
emailIntent.setType("text/plain");
emailIntent.putExtra(Intent.EXTRA_EMAIL, TO);
emailIntent.putExtra(Intent.EXTRA_CC, CC);
emailIntent.putExtra(Intent.EXTRA_SUBJECT, "Your subject");
emailIntent.putExtra(Intent.EXTRA_TEXT, "Email message goes here");
我一年前使用过这个代码，看看这个
您必须为此使用 GMailSender
将此添加到您要发送邮件的 activity
我正在使用订阅所以我把它放在 AlertDialog
@OnClick({R.id.btn_newsLetter_ok, R.id.btn_newsLetter_cancel})
public void onClick(View view) {
switch (view.getId()) {
case R.id.btn_newsLetter_ok:
email = etNewsLetterEmail.getText().toString().trim();
if (email.isEmpty()|| !android.util.Patterns.EMAIL_ADDRESS.matcher(email).matches()) {
Toast.makeText(context, "please enter a valid email address!!", Toast.LENGTH_SHORT).show();
}
else if(NetworkManager.isNetworkAvailable(context)){
try {
mailBody = mailBody.replace("@email",email);
sender = new GMailSender("yourEmail@gmail.com", "yourPassword");
StrictMode.setThreadPolicy(policy);
new MyAsyncClass().execute();
} catch (Exception ex) {
Toast.makeText(context, ex.toString(), Toast.LENGTH_SHORT).show();
}
dismiss();
}
break;
case R.id.btn_newsLetter_cancel:
dismiss();
break;
}
}
public class MyAsyncClass extends AsyncTask<Void, Void, Void> {
ProgressDialog pDialog;
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(context);
pDialog.setMessage("Please wait...");
pDialog.show();
}
@Override
protected Void doInBackground(Void... mApi) {
try {
// Add subject, Body, your mail Id, and receiver mail Id.
sender.sendMail("hi kevin", mailBody, "from@gmail.com", "to@gmail.com");
}
catch (Exception ex) {
}
return null;
}
@Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
pDialog.cancel();
Toast.makeText(context, "Email send", Toast.LENGTH_SHORT).show();
}
}
创建一个名为 GMailSender 的 java 文件并粘贴此
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(final String user, final 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.put("mail.smtp.starttls.enable", "true");
props.setProperty("mail.smtp.quitwait", "false");
session = Session.getInstance(props, new javax.mail.Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(user, password);
}
});
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 {
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);
}
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");
}
}
}
创建另一个名为 JESSEProvider 的 class 并粘贴此
public 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;
}
});
}
}
如果我忘记了什么请告诉我。
对于任何感兴趣的人，没有任何解决方案有效。由于额外的安全性（没有禁用此选项的选项），Gmail 只是拒绝允许不同的位置登录。
我转而使用其他电子邮件提供商。使用相同的代码不再有问题。
我正在尝试从应用程序发送电子邮件。
问题是 Gmail 不允许我进行身份验证，因为位置不寻常 - 当然，每个应用程序都安装在其他位置。
我的代码（使用 Javax）：
Properties props = new Properties();
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.starttls.enable", "true");
props.put("mail.smtp.host", SMTP_SERVER);
props.put("mail.smtp.port", PORT);
Session session = Session.getInstance(props,
new javax.mail.Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(USERNAME, new StringBuilder(PASSWORD).toString());
}
});
该代码在我的测试设备上运行良好，但在其他使用我的应用程序的设备上崩溃。
我得到的错误： javax.mail.AuthenticationFailedException: 534-5.7.14 请通过 534-5.7.14 登录您的网络浏览器，然后重试。 534-5.7.14 在 534 5.7.14 https://support.google.com/mail/answer/78754 了解更多信息 l9-v6sm11531942wrf.4 - gsmtp
我尝试了所有找到的解决方案，但无济于事。
"Allow less secure apps" 和 "Unlock display catcha" 的解决方案 - 没有帮助
我也尝试打开 2FA 并使用从 google 生成的 AppPassword 进行身份验证 - 没有帮助。
有什么线索吗？
在您的代码中使用 Intents 而不是使用 Properties
Intent emailIntent = new Intent(Intent.ACTION_SEND);
emailIntent.setData(Uri.parse("mailto:"));
emailIntent.setType("text/plain");
emailIntent.putExtra(Intent.EXTRA_EMAIL, TO);
emailIntent.putExtra(Intent.EXTRA_CC, CC);
emailIntent.putExtra(Intent.EXTRA_SUBJECT, "Your subject");
emailIntent.putExtra(Intent.EXTRA_TEXT, "Email message goes here");
我一年前使用过这个代码，看看这个
您必须为此使用 GMailSender
将此添加到您要发送邮件的 activity
我正在使用订阅所以我把它放在 AlertDialog
@OnClick({R.id.btn_newsLetter_ok, R.id.btn_newsLetter_cancel})
public void onClick(View view) {
switch (view.getId()) {
case R.id.btn_newsLetter_ok:
email = etNewsLetterEmail.getText().toString().trim();
if (email.isEmpty()|| !android.util.Patterns.EMAIL_ADDRESS.matcher(email).matches()) {
Toast.makeText(context, "please enter a valid email address!!", Toast.LENGTH_SHORT).show();
}
else if(NetworkManager.isNetworkAvailable(context)){
try {
mailBody = mailBody.replace("@email",email);
sender = new GMailSender("yourEmail@gmail.com", "yourPassword");
StrictMode.setThreadPolicy(policy);
new MyAsyncClass().execute();
} catch (Exception ex) {
Toast.makeText(context, ex.toString(), Toast.LENGTH_SHORT).show();
}
dismiss();
}
break;
case R.id.btn_newsLetter_cancel:
dismiss();
break;
}
}
public class MyAsyncClass extends AsyncTask<Void, Void, Void> {
ProgressDialog pDialog;
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(context);
pDialog.setMessage("Please wait...");
pDialog.show();
}
@Override
protected Void doInBackground(Void... mApi) {
try {
// Add subject, Body, your mail Id, and receiver mail Id.
sender.sendMail("hi kevin", mailBody, "from@gmail.com", "to@gmail.com");
}
catch (Exception ex) {
}
return null;
}
@Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
pDialog.cancel();
Toast.makeText(context, "Email send", Toast.LENGTH_SHORT).show();
}
}
创建一个名为 GMailSender 的 java 文件并粘贴此
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(final String user, final 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.put("mail.smtp.starttls.enable", "true");
props.setProperty("mail.smtp.quitwait", "false");
session = Session.getInstance(props, new javax.mail.Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(user, password);
}
});
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 {
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);
}
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");
}
}
}
创建另一个名为 JESSEProvider 的 class 并粘贴此
public 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;
}
});
}
}
如果我忘记了什么请告诉我。
对于任何感兴趣的人，没有任何解决方案有效。由于额外的安全性（没有禁用此选项的选项），Gmail 只是拒绝允许不同的位置登录。 我转而使用其他电子邮件提供商。使用相同的代码不再有问题。