java.lang.NoClassDefFoundError: javax.activation.DataHandler的解决办法

来源：互联网发布：手机变成电脑桌面软件编辑：程序博客网时间：2024/06/07 10:58

Android发邮件时出现一下问题：

04-20 09:28:23.663: E/AndroidRuntime(13202):    java.lang.NoClassDefFoundError: javax.activation.DataHandler04-20 09:28:23.663: E/AndroidRuntime(13202): at javax.mail.internet.MimeMessage.setContent(MimeMessage.java:1454)04-20 09:28:23.663: E/AndroidRuntime(13202): at javax.mail.internet.MimeBodyPart.setText(MimeBodyPart.java:1075)04-20 09:28:23.663: E/AndroidRuntime(13202): at javax.mail.internet.MimeMessage.setText(MimeMessage.java:1493)04-20 09:28:23.663: E/AndroidRuntime(13202): at javax.mail.internet.MimeMessage.setText(MimeMessage.java:1477)04-20 09:28:23.663: E/AndroidRuntime(13202): at cn.edu.zzu.mail.SendMail.send(SendMail.java:42)04-20 09:28:23.663: E/AndroidRuntime(13202): at cn.edu.zzu.mail.SendMail.sendMail(SendMail.java:63)04-20 09:28:23.663: E/AndroidRuntime(13202): at cn.edu.zzu.ui.SettingSuggestUi$2$1.run(SettingSuggestUi.java:79)

解决办法在你的项目中导入additionnal.jar，具体大家可以打开https://code.google.com/p/javamail-android/downloads/list看一下，上面明确指出

activation.jarJAF for android (need additionnal.jar)