0
この質問には多くの回答がありますが、まだ私の問題が解決していないので、この質問をしています。Androidでメールを送信するjava.lang.NoClassDefFoundError：javax.activation.DataHandler
この質問の他のバージョンで説明したすべての修正を試みましたが、何も役に立たなかった。
マイコード：
package com.blogspot.ram914.flames;
import android.accounts.Account;
import android.accounts.AccountManager;
import android.app.ProgressDialog;
import android.content.Context;
import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import javax.mail.Authenticator;
import java.util.Properties;
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;
public class SendMail extends AppCompatActivity {
private final String MAIL = "my e-mail";
private final String PASSWORD = "my password";
EditText etSenderMaildId;
EditText etSenderName;
EditText etRecipientMailId;
EditText etRecipientName;
EditText etMessage;
Button btnSend;
ProgressDialog pdialog = null;
Context context = null;
String RelationName;
static Session session = null;
// First go and Turn on less secure app access to sender mail
static String receiverMailId = "", subject = "", textMessage = "";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_send_mail);
context = this;
String senderName;
String senderMailId;
String receiverName;
Bundle b = getIntent().getExtras();
RelationName = b.getString("relation_name");
senderName = b.getString("sender_name");
receiverName = b.getString("recipient_name");
etSenderMaildId = (EditText) findViewById(R.id.sender_mail_id);
etSenderName = (EditText) findViewById(R.id.sender_name);
etRecipientMailId = (EditText) findViewById(R.id.recipient_mail_id);
etRecipientName = (EditText) findViewById(R.id.recipiend_name);
etMessage = (EditText) findViewById(R.id.meassage);
btnSend = (Button) findViewById(R.id.send);
senderMailId = getSenderMailId();
etSenderMaildId.setText(senderMailId);
etSenderMaildId.setEnabled(false);
etSenderName.setText(senderName);
etSenderName.setEnabled(false);
etRecipientName.setText(receiverName);
etRecipientName.setEnabled(false);
}
@Override
protected void onPause() {
super.onPause();
if(pdialog != null)
pdialog.dismiss();
pdialog = null;
}
@Override
protected void onStop() {
super.onStop();
if(pdialog != null)
pdialog.dismiss();
pdialog = null;
}
public void sendTo(View view) {
Properties props = new Properties();
props.put("mail.smtp.host", "smtp.gmail.com");
props.put("mail.smtp.socketFactory.port", "465");
props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.port", "465");
receiverMailId = etRecipientMailId.getText().toString();
subject = "From Flames App";
textMessage = getMessageContent();
session = Session.getDefaultInstance(props, new Authenticator() {
@Override
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(SendMail.this.MAIL, SendMail.this.PASSWORD);
}
});
System.out.println("Ram Prasad");
try{
pdialog = ProgressDialog.show(context, "", "Sending Mail...", true);
} catch(Exception e) {
Log.d("\n\n\nStatus :","Failed\n\n\n");
}
System.out.println("Ram Prasad");
RetreiveFeedTask task = new RetreiveFeedTask();
task.execute("");
}
public void enableEdit(View view) {
view.setEnabled(true);
}
public String getSenderMailId() {
AccountManager manager = AccountManager.get(this);
Account[] accounts = manager.getAccounts();
for (Account account : accounts) {
if(account.type.equals("com.google")) {
return account.name;
}
System.out.println("\n\n"+account.name+"\n\n");
}
return "your mail id";
}
public String getMessageContent() {
return "Hi "+etRecipientName.getText().toString()+",\n"+
"Do you know "+etSenderName.getText().toString()+"?\n"
+etSenderName.getText().toString()+" played flames with you and got the below relation.\n"
+RelationName+"\n\n and \n"
+etSenderName.getText().toString()+" sent a message for you :\n"
+etMessage.getText().toString()+" \n\n\n"
+"Sender : "+etSenderMaildId.getText().toString();
}
private class RetreiveFeedTask extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... params) {
try{
compile Message message = new MimeMessage(session);
message.setFrom(new InternetAddress("[email protected]"));
message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(SendMail.receiverMailId));
message.setSubject(SendMail.subject);
message.setText(SendMail.textMessage);
Transport.send(message);
} catch(Exception e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String result) {
if(pdialog != null)
pdialog.dismiss();
pdialog = null;
Toast.makeText(getApplicationContext(), "Message sent", Toast.LENGTH_LONG).show();
}
}
}
と例外は以下のとおりです。
Caused by: java.lang.NoClassDefFoundError:javax.activation.DataHandler
at javax.mail.internet.MimeMessage.setContent(MimeMessage.java:1566)
at javax.mail.internet.MimeBodyPart.setText(MimeBodyPart.java:1219)
at javax.mail.internet.MimeMessage.setText(MimeMessage.java:1607)
at javax.mail.internet.MimeMessage.setText(MimeMessage.java:1590)
at com.blogspot.ram914.flames.SendMail$RetreiveFeedTask.doInBackground(SendMail.java:168)
at com.blogspot.ram914.flames.SendMail$RetreiveFeedTask.doInBackground(SendMail.java:158)
at android.os.AsyncTask$2.call(AsyncTask.java:264)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
at java.util.concurrent.FutureTask.run(FutureTask.java:137)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:208)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
at java.lang.Thread.run(Thread.java:864)
そして私はmail.jarのやライブラリなど activation.jarのの両方を追加しました。 see here
私のアプリをクラッシュさせずにこのコードを実行するために苦労しています。 誰も私を助けることができますか？
EDIT：
Caused by: java.lang.NoClassDefFoundError: java.nio.charset.StandardCharsets
at com.sun.mail.smtp.SMTPTransport$LoginAuthenticator.doAuth(SMTPTransport.java:982)
at com.sun.mail.smtp.SMTPTransport$Authenticator.authenticate(SMTPTransport.java:927)
at com.sun.mail.smtp.SMTPTransport.authenticate(SMTPTransport.java:861)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:766)
at javax.mail.Service.connect(Service.java:388)
at javax.mail.Service.connect(Service.java:246)
at javax.mail.Service.connect(Service.java:195)
at javax.mail.Transport.send0(Transport.java:254)
at javax.mail.Transport.send(Transport.java:124)
at com.blogspot.ram914.flames.SendMail$RetreiveFeedTask.doInBackground(SendMail.java:169)
at com.blogspot.ram914.flames.SendMail$RetreiveFeedTask.doInBackground(SendMail.java:158)
at android.os.AsyncTask$2.call(AsyncTask.java:264)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
at java.util.concurrent.FutureTask.run(FutureTask.java:137)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:208)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
at java.lang.Thread.run(Thread.java:864)
私の問題は今異なっています。 – ram914
そのエラーだけで質問を開きます。 [StandardCharsets]（https://developer.android.com/reference/java/nio/charset/StandardCharsets.html）がAPIレベル19で追加されたため、古いバージョンのAndroidを使用しているようです。JavaMail 1.5にダウングレードしてみてください.6。 – jmehrens