android - javax.mail.nosuchproviderexception smtp

Question

我在我的 Android 应用程序中使用以下代码发送电子邮件:

    m_properties = new Properties();
    m_properties.put("mail.smtp.host", "smtp.gmail.com");
    m_properties.put("mail.smtp.socketFactory.port", "465");
    m_properties.put("mail.smtp.socketFactory.class",
                    "javax.net.ssl.SSLSocketFactory");
    m_properties.put("mail.smtp.auth", "true");
    m_properties.put("mail.smtp.port", "465");

    m_Session = Session.getDefaultInstance(m_properties,
                    new Authenticator() {
                        protected PasswordAuthentication getPasswordAuthentication() {
                            return new PasswordAuthentication(userName,
                                    passWord);
                        }

                    });

    m_simpleMessage = new MimeMessage(m_Session);

    m_fromAddress = new InternetAddress(userName);
    m_toAddress = new InternetAddress(eRecipient);

    m_simpleMessage.setFrom(m_fromAddress);
    m_simpleMessage.setRecipient(RecipientType.TO, m_toAddress);
    m_simpleMessage.setSubject(eSubject);
    m_simpleMessage.setContent(eBody, "text/plain");

    Transport.send(m_simpleMessage);

在我混淆我的代码之前，它工作得非常好。然后电子邮件发送失败，抛出错误:javax.mail.nosuchproviderexception smtp

我在我的 proguard.cfg 中尝试了各种设置，例如:-keep class javax.mail.** { *;

但没有任何效果。如果我关闭混淆，它会再次正常工作。

知道为什么会发生这种情况吗？

提前致谢。

编辑:我的 Proguard 配置文件

-dontusemixedcaseclassnames
-dontskipnonpubliclibraryclasses
-dontskipnonpubliclibraryclassmembers
-verbose


-libraryjars "C:\Program Files\Android\android-sdk\platforms\android-15\android.jar"
-libraryjars "C:\Documents and Settingslibs\commons-io-2.4.jar"
-libraryjars "C:\Documents and Settings\libs\mail.jar"
-libraryjars "C:\Documents and Settingslibs\activation.jar"
-libraryjars "C:\Documents and Settings\libs\additionnal.jar"
-libraryjars "C:\Documents and Settings\libs\dropbox-android-sdk-1.3.1.jar"
-libraryjars "C:\Documents and Settings\libs\microsoft-translator-java-api-0.6.1-jar-with-dependencies.jar"
-libraryjars "C:\Documents and Settings\pingpongboss-StandOut-5c5cbe9\library\bin\standout.jar"
-libraryjars "C:\Documents and Settings\android-uitableview\android-uitableview\bin\br_com_dina_ui.jar"

-dontpreverify


!code/simplification/arithmetic,!code/simplification/cast,!field/*,!class/merging/*
-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*
-optimizationpasses 5
-allowaccessmodification

-keep public class * extends android.app.Activity
-keep public class * extends android.app.Application
-keep public class * extends android.app.Service
-keep public class com.android.vending.licensing.ILicensingService

-keep public class * extends android.view.View {
    public <init>(android.content.Context);
    public <init>(android.content.Context, android.util.AttributeSet);
    public <init>(android.content.Context, android.util.AttributeSet, int);
    public void set*(...);
}


-keepclassmembers class * extends android.app.Activity {
   public void *(android.view.View);
}


-keepclassmembers enum * {
    public static **[] values();
    public static ** valueOf(java.lang.String);
}

-keep public class com.winterwell.jgeoplanet.** {
  public protected *;
}

-keep public class winterwell.jwitter.** {
  public protected *;
}

-keep public class winterwell.json.** {
  public protected *;
}

-keep class com.winterwell.** { *; }

-keep class winterwell.** { *; }

-keep class com.faceture.google.** { *; }
-keep class com.faceture.google.play.** { *; }
-keep class com.faceture.google.play.domain.** { *; }
-keep class com.faceture.http.** { *; }
-keep class com.faceture.rest.** { *; }
-keep class com.faceture.google.gson.** { *; }
-keep class com.google.gson.** { *; }


-dontwarn android.support.**
-dontwarn org.apache.commons.codec.binary.**
-dontwarn org.apache.harmony.awt.**
-dontwarn javax.activation.**
-dontwarn com.sun.mail.imap.protocol.**

-keepattributes Signature

-keepattributes *Annotation*


-keep class sun.misc.Unsafe { *; }

-keep class com.google.gson.examples.android.model.** { *; }

---

由于这些错误，上面的警告已被删除:

Warning: javax.activation.CommandInfo: can't find referenced class java.beans.Beans
Warning: com.sun.mail.imap.protocol.IMAPSaslAuthenticator: can't find referenced class javax.security.sasl.Sasl
+ can't find referenced class javax.security.sasl.SaslClient
+ can't find referenced class javax.security.sasl.SaslException
+ can't find referenced class javax.security.auth.callback.NameCallback
+ can't find referenced class javax.security.sasl.RealmCallback

Answer 1

我通过包含下面详述的额外 Proguard 配置解决了这个问题。我从 this answer 得到了解决方案其中有更多信息。

-keep class javamail.** {*;}
-keep class javax.mail.** {*;}
-keep class javax.activation.** {*;}

-keep class com.sun.mail.dsn.** {*;}
-keep class com.sun.mail.handlers.** {*;}
-keep class com.sun.mail.smtp.** {*;}
-keep class com.sun.mail.util.** {*;}
-keep class mailcap.** {*;}
-keep class mimetypes.** {*;}
-keep class myjava.awt.datatransfer.** {*;}
-keep class org.apache.harmony.awt.** {*;}
-keep class org.apache.harmony.misc.** {*;}