我正在使用以下代码在我的Android应用程序中发送电子邮件：
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);
在我对代码进行模糊处理之前，它完全正常。然后电子邮件无法发送，抛出错误： javax.mail.nosuchproviderexception smtp
我在proguard.cfg中尝试了各种设置，例如：-keep class javax.mail。** {*; }
但没有任何作用。如果我关闭混淆，它再次正常工作。
为什么会发生这种情况的任何想法？
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
答案 0 :(得分：7)
我通过包含下面详细介绍的其他Proguard配置解决了这个问题。我从this answer获得了解决方案，其中包含更多信息。
-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.** {*;}
答案 1 :(得分：1)
我不知道Proguard是什么，但听起来它正在将类文件从mail.jar中拉出来并将它们添加到你的jar中。不幸的是，它不包括mail.jar文件中的配置文件。您需要mail.jar文件中META-INF的文件。或者更好的是，不要重新打包mail.jar，只是按原样使用它。
答案 2 :(得分：0)
通常由于错误的“mail.jar”而发生此错误。
解决方案：
1]检查“mail.jar”是否在您的类路径中。
2]如果它在类路径中，请检查最新版本的“mail.jar”然后 将它包含在你的类路径中。
您可以从
查看并下载最新版本