将xstream1.4.8 引入Android Strudio项目中，编译报错如下：

UNEXPECTED TOP-LEVEL EXCEPTION:

com.android.dx.cf.iface.ParseException: bad class file magic (cafebabe) or version (0034.0000)

at com.android.dx.cf.direct.DirectClassFile.parse0(DirectClassFile.java:472)

at com.android.dx.cf.direct.DirectClassFile.parse(DirectClassFile.java:406)

at com.android.dx.cf.direct.DirectClassFile.parseToInterfacesIfNecessary(DirectClassFile.java:388)

at com.android.dx.cf.direct.DirectClassFile.getMagic(DirectClassFile.java:251)

at com.android.dx.command.dexer.Main.processClass(Main.java:665)

at com.android.dx.command.dexer.Main.processFileBytes(Main.java:634)

at com.android.dx.command.dexer.Main.access$600(Main.java:78)

at com.android.dx.command.dexer.Main$1.processFileBytes(Main.java:572)

at com.android.dx.cf.direct.ClassPathOpener.processArchive(ClassPathOpener.java:284)

at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:166)

at com.android.dx.cf.direct.ClassPathOpener.process(ClassPathOpener.java:144)

at com.android.dx.command.dexer.Main.processOne(Main.java:596)

at com.android.dx.command.dexer.Main.processAllFiles(Main.java:498)

at com.android.dx.command.dexer.Main.runMonoDex(Main.java:264)

at com.android.dx.command.dexer.Main.run(Main.java:230)

at com.android.dx.command.dexer.Main.main(Main.java:199)

at com.android.dx.command.Main.main(Main.java:103)

...while parsing com/thoughtworks/xstream/mapper/LambdaMapper.class

1 error; aborting

Error:Execution failed for task ':app:preDexDebug'.

> com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command '/opt/jdk/jdk1.7.0_71/bin/java'' finished with non-zero exit value 1

Information:BUILD FAILED

究其原因，xstream1.4.8为Java8编译，而目前AS尚只支持Java7。那么我们只好使用低版本的xstream。

既然可以解析json和xml，那么这个库应该能够吃得开才对。目前很多项目既要解析xml，又要解析json。如果一个库搞定，学习成本会下降很多。