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我有一个简单的 android 一键式应用程序,按下按钮时会自动发送电子邮件。该应用程序在模拟器中运行良好,但在真实设备(三星 gt-n7000)上该应用程序将无法运行。该设备仅连接到 Wi-Fi。

以下是代码:

import java.util.Date;
import java.util.Properties;

import javax.activation.CommandMap;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.activation.MailcapCommandMap;
import javax.mail.BodyPart;
import javax.mail.Multipart;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;

public class GMailSender extends javax.mail.Authenticator {
    private String _user; 
      private String _pass; 

      private String[] _to; 
      private String _from; 

      private String _port; 
      private String _sport; 

      private String _host; 

      private String _subject; 
      private String _body; 

      private boolean _auth; 

      private boolean _debuggable; 

      private Multipart _multipart; 


      public GMailSender() { 
        _host = "smtp.gmail.com"; // default smtp server 
        _port = "465"; // default smtp port 
        _sport = "465"; // default socketfactory port 

        _user = ""; // username 
        _pass = ""; // password 
        _from = ""; // email sent from 
        _subject = ""; // email subject 
        _body = ""; // email body 

        _debuggable = false; // debug mode on or off - default off 
        _auth = true; // smtp authentication - default on 

        _multipart = new MimeMultipart(); 

        // There is something wrong with MailCap, javamail can not find a handler for the multipart/mixed part, so this bit needs to be added. 
        MailcapCommandMap mc = (MailcapCommandMap) CommandMap.getDefaultCommandMap(); 
        mc.addMailcap("text/html;; x-java-content-handler=com.sun.mail.handlers.text_html");
        mc.addMailcap("text/xml;; x-java-content-handler=com.sun.mail.handlers.text_xml"); 
        mc.addMailcap("text/plain;; x-java-content-handler=com.sun.mail.handlers.text_plain"); 
        mc.addMailcap("multipart/*;; x-java-content-handler=com.sun.mail.handlers.multipart_mixed"); 
        mc.addMailcap("message/rfc822;; x-java-content-handler=com.sun.mail.handlers.message_rfc822"); 
        CommandMap.setDefaultCommandMap(mc); 
      } 

      public GMailSender(String user, String pass) { 
        this(); 

        _user = user; 
        _pass = pass; 
      } 

      public boolean send() throws Exception { 
        Properties props = _setProperties(); 

        if(!_user.equals("") && !_pass.equals("") && _to.length > 0 && !_from.equals("") && !_subject.equals("") && !_body.equals("")) { 
          Session session = Session.getInstance(props, this); 

          MimeMessage msg = new MimeMessage(session); 

          msg.setFrom(new InternetAddress(_from)); 

          InternetAddress[] addressTo = new InternetAddress[_to.length]; 
          for (int i = 0; i < _to.length; i++) { 
            addressTo[i] = new InternetAddress(_to[i]); 
          } 
            msg.setRecipients(MimeMessage.RecipientType.TO, addressTo); 

          msg.setSubject(_subject); 
          msg.setSentDate(new Date()); 

          // setup message body 
          BodyPart messageBodyPart = new MimeBodyPart(); 
          messageBodyPart.setText(_body); 
          _multipart.addBodyPart(messageBodyPart); 

          // Put parts in message 
          msg.setContent(_multipart); 

          // send email 
          Transport.send(msg); 

          return true; 
        } else { 
          return false; 
        } 
      } 

      public void addAttachment(String filename) throws Exception { 
        BodyPart messageBodyPart = new MimeBodyPart(); 
        DataSource source = new FileDataSource(filename); 
        messageBodyPart.setDataHandler(new DataHandler(source)); 
        messageBodyPart.setFileName(filename); 

        _multipart.addBodyPart(messageBodyPart); 
      } 

      @Override 
      public javax.mail.PasswordAuthentication getPasswordAuthentication() {
        return  new javax.mail.PasswordAuthentication(_user,_pass); 
      } 

      private Properties _setProperties() { 
        Properties props = new Properties(); 

        props.put("mail.smtp.host", _host); 

        if(_debuggable) { 
          props.put("mail.debug", "true"); 
        } 

        if(_auth) { 
          props.put("mail.smtp.auth", "true"); 
        } 

        props.put("mail.smtp.port", _port); 
        props.put("mail.smtp.socketFactory.port", _sport); 
        props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory"); 
        props.put("mail.smtp.socketFactory.fallback", "false"); 

        return props; 
      } 

      // the getters and setters 
      public String getBody() { 
        return _body; 
      } 

      public void setBody(String _body) { 
        this._body = _body; 
      }

    public String[] get_to() {
        return _to;
    }

    public void set_to(String[] _to) {
        this._to = _to;
    }

    public String get_from() {
        return _from;
    }

    public void set_from(String _from) {
        this._from = _from;
    }

    public String get_subject() {
        return _subject;
    }

    public void set_subject(String _subject) {
        this._subject = _subject;
    } 

    } 

主类:

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
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.activity_main);
    }

    public void sending(View v) {
           GMailSender mailsender = new GMailSender("example@gmail.com", "password");

           String[] toArr = { "mussa2kasssim@hotmail.com" };
           mailsender.set_to(toArr);
           mailsender.set_from("example@gmail.com");
           mailsender.set_subject("This is an email sent using my Mail JavaMail wrapper from an Android device.");
           mailsender.setBody("Hello World!");
          // mailsender.send();

         try {
               //mailsender.addAttachment("/sdcard/filelocation");

               if (mailsender.send()) {
                   Toast.makeText(MainActivity.this,
                           "Email was sent successfully.",
                           Toast.LENGTH_LONG).show();
               } else {
                   Toast.makeText(MainActivity.this, "Email was not sent.",
                           Toast.LENGTH_LONG).show();
               }
           } catch (Exception e) {

               Log.e("MailApp", "Could not send email", e);
           }
       } 
    }

注意:“example@gmail.com”和“password”被替换为真实值。

请帮忙。谢谢

显现:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.nikhil.emailing"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="15" />

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.emailing.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.example.emailing.EmailActivity"
            android:label="@string/title_activity_email" >
        </activity>
    </application>

</manifest>

XML:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:onClick="sending"
        android:text="Email" />

</RelativeLayout>

错误日志:

11-07 12:43:07.616: ERROR/lights(1845): write_int: path/sys/devices/virtual/sec/sec_touchkey/brightness, value 1
11-07 12:43:07.841: ERROR/MailApp(24559): Could not send email
11-07 12:43:07.841: ERROR/MailApp(24559): android.os.NetworkOnMainThreadException
11-07 12:43:07.841: ERROR/MailApp(24559):     at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1099)
11-07 12:43:07.841: ERROR/MailApp(24559):     at java.net.InetAddress.lookupHostByName(InetAddress.java:391)
11-07 12:43:07.841: ERROR/MailApp(24559):     at java.net.InetAddress.getLocalHost(InetAddress.java:371)
11-07 12:43:07.841: ERROR/MailApp(24559):     at javax.mail.internet.InternetAddress.getLocalAddress(InternetAddress.java:517)
11-07 12:43:07.841: ERROR/MailApp(24559):     at javax.mail.internet.UniqueValue.getUniqueMessageIDValue(UniqueValue.java:99)
11-07 12:43:07.841: ERROR/MailApp(24559):     at javax.mail.internet.MimeMessage.updateMessageID(MimeMessage.java:2054)
11-07 12:43:07.841: ERROR/MailApp(24559):     at javax.mail.internet.MimeMessage.updateHeaders(MimeMessage.java:2076)
11-07 12:43:07.841: ERROR/MailApp(24559):     at javax.mail.internet.MimeMessage.saveChanges(MimeMessage.java:2042)
11-07 12:43:07.841: ERROR/MailApp(24559):     at javax.mail.Transport.send(Transport.java:117)
11-07 12:43:07.841: ERROR/MailApp(24559):     at com.nikhil.emailing.GMailSender.send(GMailSender.java:105)
11-07 12:43:07.841: ERROR/MailApp(24559):     at com.nikhil.emailing.MainActivity.sending(MainActivity.java:31)
11-07 12:43:07.841: ERROR/MailApp(24559):     at java.lang.reflect.Method.invokeNative(Native Method)
11-07 12:43:07.841: ERROR/MailApp(24559):     at java.lang.reflect.Method.invoke(Method.java:511)
11-07 12:43:07.841: ERROR/MailApp(24559):     at android.view.View$1.onClick(View.java:3095)
11-07 12:43:07.841: ERROR/MailApp(24559):     at android.view.View.performClick(View.java:3627)
11-07 12:43:07.841: ERROR/MailApp(24559):     at android.view.View$PerformClick.run(View.java:14329)
11-07 12:43:07.841: ERROR/MailApp(24559):     at android.os.Handler.handleCallback(Handler.java:605)
11-07 12:43:07.841: ERROR/MailApp(24559):     at android.os.Handler.dispatchMessage(Handler.java:92)
11-07 12:43:07.841: ERROR/MailApp(24559):     at android.os.Looper.loop(Looper.java:137)
11-07 12:43:07.841: ERROR/MailApp(24559):     at android.app.ActivityThread.main(ActivityThread.java:4511)
11-07 12:43:07.841: ERROR/MailApp(24559):     at java.lang.reflect.Method.invokeNative(Native Method)
11-07 12:43:07.841: ERROR/MailApp(24559):     at java.lang.reflect.Method.invoke(Method.java:511)
11-07 12:43:07.841: ERROR/MailApp(24559):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:980)
11-07 12:43:07.841: ERROR/MailApp(24559):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:747)
11-07 12:43:07.841: ERROR/MailApp(24559):     at dalvik.system.NativeStart.main(Native Method)
11-07 12:43:08.786: ERROR/DataRouter(1690): usb connection is true 
11-07 12:43:08.786: ERROR/DataRouter(1690): DSR is ON. Don't send DTR ON.
11-07 12:43:09.121: ERROR/lights(1845): write_int: path /sys/devices/virtual/sec/sec_touchkey/brightness, value 2
11-07 12:43:09.741: ERROR/AlarmManagerService(1845): android_server_AlarmManagerService_set to type=1, 1383830133.779000000
11-07 12:43:09.896: ERROR/AlarmManagerService(1845): android_server_AlarmManagerService_set to type=1, 1383828192.898000000
11-07 12:43:10.791: ERROR/DataRouter(1690): usb connection is true 
11-07 12:43:10.791: ERROR/DataRouter(1690): DSR is ON. Don't send DTR ON.
11-07 12:43:12.791: ERROR/DataRouter(1690): usb connection is true 
11-07 12:43:12.791: ERROR/DataRouter(1690): DSR is ON. Don't send DTR ON.
11-07 12:43:12.896: ERROR/AlarmManagerService(1845): android_server_AlarmManagerService_set to type=1, 1383830133.779000000
11-07 12:43:13.036: ERROR/AlarmManagerService(1845): android_server_AlarmManagerService_set to type=1, 1383828196.040000000
4

3 回答 3

1

异常说 android.os.NetworkOnMainThreadException

这意味着不应该在主线程(特别是 UI 线程)上执行与网络相关的任务。在后台线程上运行它,它会工作。

于 2013-11-07T13:04:24.443 回答
0

它与一些 ThreadPolicy 有关,我从另一篇文章中读到它。它基本上阻止了应用程序启动的连接。因此,要禁用此策略,我必须将这段代码放入使用连接的活动的 onCreate() 中。

代码是:

if (android.os.Build.VERSION.SDK_INT > 9) {
            StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
            StrictMode.setThreadPolicy(policy);
          }

它按预期工作:))

于 2013-11-07T13:39:46.883 回答
0

相关任务应在 AsyncTask 中执行。

于 2013-11-07T13:08:52.053 回答