from: http://blog.csdn.net/yy1300326388/article/details/43759267

通過Maven中央庫新增第三方jar包的時候，出現了重複載入jar包的問題，解決辦法很簡單去掉一個不讓它去載入就OK了

一、錯誤

1. Error:Execution failed for task ':app:dexDebug'.  
2. > com.android.ide.common.internal.LoggedErrorException: Failed to run command:  
3.     F:\zsl\sdk\build-tools\21.1.2\dx.bat --dex --output F:\zsl\Android\pro\RecipesDaquan\app\build\intermediates\dex\debug --input-list
   =F:\zsl\Android\pro\RecipesDaquan\app\build\intermediates\tmp\dex\debug\inputList.txt  
4. Error Code:  
5.     2  
6. Output:  
7.     UNEXPECTED TOP-LEVEL EXCEPTION:  
8.     com.android.dex.DexException:<strong><spanstyle="color:#3333ff;">Multiple dex files define Landroid/</span><spanstyle="color:#ff0000;"
   >support/v4</span><spanstyle="color:#3333ff;">/accessibilityservice/AccessibilityServiceInfoCompatIcs;</span></strong>
9.         at com.android.dx.merge.DexMerger.readSortableTypes(DexMerger.java:596)  
10.         at com.android.dx.merge.DexMerger.getSortedTypes(DexMerger.java:554)  
11.         at com.android.dx.merge.DexMerger.mergeClassDefs(DexMerger.java:535)  
12.         at com.android.dx.merge.DexMerger.mergeDexes(DexMerger.java:171)  
13.         at com.android.dx.merge.DexMerger.merge(DexMerger.java:189)  
14.         at com.android.dx.command.dexer.Main.mergeLibraryDexBuffers(Main.java:454)  
15.         at com.android.dx.command.dexer.Main.runMonoDex(Main.java:303)  
16.         at com.android.dx.command.dexer.Main.run(Main.java:246)  
17.         at com.android.dx.command.dexer.Main.main(Main.java:215)  
18.         at com.android.dx.command.Main.main(Main.java:106)  

1. dependencies {  
2.     compile fileTree(dir: 'libs', include: ['*.jar'])  
3.     compile 'com.android.support:appcompat-v7:21.0.0'  
4.     <spanstyle="color:#ff0000;">compile 'in.srain.cube:cube-sdk:1.0.42.1'</span>
5.     compile files('libs/android-async-http-1.4.6.jar')  
6. }  

看一下，libraries是否是我們所講的那樣，重複載入v4包

二、解決辦法

1. dependencies {  
2.     compile fileTree(dir: 'libs', include: ['*.jar'])  
3.     compile 'com.android.support:appcompat-v7:21.0.0'
4.     <span style="color:#ff0000;">compile ('in.srain.cube:cube-sdk:1.0.42.1'){  
5.         exclude module: 'support-v4'
6.     }</span>  
7.     compile files('libs/android-async-http-1.4.6.jar')  
8. }