Duplicate class org.kobjects.base64.Base64 found in modules

当android编译后出现下面问题的主要原因是：jar包重复

	Duplicate class org.kobjects.base64.Base64 found in modules ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar (ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar) and ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar (ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar)
	Duplicate class org.kobjects.crypt.Crypt found in modules ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar (ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar) and ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar (ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar)
	Duplicate class org.kobjects.io.BoundInputStream found in modules ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar (ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar) and ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar (ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar)
	Duplicate class org.kobjects.io.LookAheadReader found in modules ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar (ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar) and ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar (ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar)
	Duplicate class org.kobjects.isodate.IsoDate found in modules ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar (ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar) and ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar (ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar)
	Duplicate class org.kobjects.mime.Decoder found in modules ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar (ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar) and ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar (ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar)
	Duplicate class org.kobjects.pim.PimField found in modules ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar (ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar) and ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar (ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar)
	Duplicate class org.kobjects.pim.PimItem found in modules ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar (ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar) and ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar (ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar)
	Duplicate class org.kobjects.pim.PimParser found in modules ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar (ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar) and ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar (ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar)
	Duplicate class org.kobjects.pim.PimWriter found in modules ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar (ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar) and ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar (ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar)
	Duplicate class org.kobjects.pim.VCard found in modules ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar (ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar) and ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar (ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar)
	Duplicate class org.kobjects.rss.RssReader found in modules ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar (ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar) and ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar (ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar)
	Duplicate class org.kobjects.util.ChainedRuntimeException found in modules ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar (ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar) and ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar (ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar)
	Duplicate class org.kobjects.util.Csv found in modules ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar (ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar) and ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar (ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar)
	Duplicate class org.kobjects.util.SingleEnumeration found in modules ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar (ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar) and ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar (ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar)
	Duplicate class org.kobjects.util.Strings found in modules ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar (ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar) and ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar (ksoap2-android-assembly-3.3.0-jar-with-dependencies.jar)
	Duplicate class org.kobjects.util.Util found in modules ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar (ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar) and ksoap2-android-assembly-3.

解决方法：Android Studio中 File->Project Structure->Dependencies->app 在右边的Dependency下看是否有重复的jar包，例如下图所示两个包只是版本不一样。所以要删除多余的包。

点击多余的jar包后在点击上面的 - 号删除掉。
如果你的libs文件夹下也添加了重复的jar包也得删除，右键点击重复的jar包，然后Delete。

然后重新编译，此问题就解决了。