将jar添加到android studio时出错

Question

我正在尝试将邮件，激活和aditionnal罐子放到我的android工作室，以便在不使用内置邮件应用程序的情况下发送电子邮件。但是我在跑步时遇到错误，我搜索了很多而没有任何帮助我不知道问题到底是什么。有人可以帮忙吗？我正在使用android studio 2.2。 以下是我得到的错误

Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
(javax.activation.DataHandler$1) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(javax.activation.SecuritySupport$1) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(javax.activation.SecuritySupport$2) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(javax.activation.SecuritySupport$3) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(javax.activation.SecuritySupport$4) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a

还有更多错误。 任何人都可以帮忙吗

Answer 1

如果您阅读它说它是使用不同的编译器编译的，因此不受支持。

  

这门课可能是由一个   没有以现代.class文件格式为目标的编译器。推荐   解决方案是使用最新的编译器从源代码重新编译类   并且没有指定任何＆＃34; -target＆＃34;类型选项。无视的后果   这个警告是这个类的反射操作会不正确   表明不是一个内部类。

我不知道你从哪里得到你的jar文件，但我认为它不会起作用。