我使用SVN更新了项目后出现这个错误，貌似是更新了包，我用的是V7包，别人用的是V4，怎么改可以正常运行呀？最好项目以后更新也不会出现这个问题
Error:Execution failed for task ':app:dexDebug'.
com.android.ide.common.internal.LoggedErrorException: Failed to run command:
C:\Users\Administrator\AppData\Local\Android\sdk\build-tools\21.1.2\dx.bat --dex --no-optimize --output D:\android-studio\exercise\ex05\svn_androidStuido\app\build\intermediates\dex\debug --input-list=D:\android-studio\exercise\ex05\svn_androidStuido\app\build\intermediates\tmp\dex\debug\inputList.txt
Error Code:
2
Output:
UNEXPECTED TOP-LEVEL EXCEPTION:
com.android.dex.DexException: Multiple dex files define Landroid/support/v4/accessibilityservice/AccessibilityServiceInfoCompatIcs;
at com.android.dx.merge.DexMerger.readSortableTypes(DexMerger.java:596)
at com.android.dx.merge.DexMerger.getSortedTypes(DexMerger.java:554)
at com.android.dx.merge.DexMerger.mergeClassDefs(DexMerger.java:535)
at com.android.dx.merge.DexMerger.mergeDexes(DexMerger.java:171)
at com.android.dx.merge.DexMerger.merge(DexMerger.java:189)
at com.android.dx.command.dexer.Main.mergeLibraryDexBuffers(Main.java:454)
at com.android.dx.command.dexer.Main.runMonoDex(Main.java:303)
at com.android.dx.command.dexer.Main.run(Main.java:246)
at com.android.dx.command.dexer.Main.main(Main.java:215)
at com.android.dx.command.Main.main(Main.java:106)
