Android 多個DEX錯誤 Multiple dex files define Landroid/support/v7/app/ActionBar$DisplayOptions;

標籤：

今天在寫程式的時候我的Android Studio 突然編譯錯誤（錯誤提示如下：）後來經過我的幾番折騰發現每一次都要先Clear Project一下然後再Build就可以了，如果你第二次再Build的時候就報錯。後來我就找到了最強的老師（Google）嘗試解決！可惜很遺憾，我在Google上看到的都是Eclipse上的解決方案。並沒有找到我想要的答案，難道要我每一次在Build的時候都要先Clear Project嗎？最後又經過我的幾番折騰我發現在Project Structure--->app--->Properties中有一個選項叫：Incremental Dex (增加的DEX)的值為True,我又建立了一個項目發現預設值是空值，果然把這個改成空值問題就全然解決了！雖然現在我也不知道這一個選項到底是有什麼用。

錯誤提示：

 

Information:Gradle tasks [:app:assembleDebug]:app:preBuild UP-TO-DATE:app:preDebugBuild UP-TO-DATE:app:checkDebugManifest:app:preReleaseBuild UP-TO-DATE:app:prepareComAndroidSupportAnimatedVectorDrawable2330Library UP-TO-DATE:app:prepareComAndroidSupportAppcompatV72330Library UP-TO-DATE:app:prepareComAndroidSupportSupportV42330Library UP-TO-DATE:app:prepareComAndroidSupportSupportVectorDrawable2330Library UP-TO-DATE:app:prepareDebugDependencies:app:compileDebugAidl UP-TO-DATE:app:compileDebugRenderscript UP-TO-DATE:app:generateDebugBuildConfig UP-TO-DATE:app:generateDebugAssets UP-TO-DATE:app:mergeDebugAssets UP-TO-DATE:app:generateDebugResValues UP-TO-DATE:app:generateDebugResources UP-TO-DATE:app:mergeDebugResources UP-TO-DATE:app:processDebugManifest UP-TO-DATE:app:processDebugResources UP-TO-DATE:app:generateDebugSources UP-TO-DATE:app:processDebugJavaRes UP-TO-DATE:app:compileDebugJavaWithJavac:app:compileDebugNdk UP-TO-DATE:app:compileDebugSources:app:preDexDebug UP-TO-DATE:app:dexDebugUNEXPECTED TOP-LEVEL EXCEPTION:com.android.dex.DexException: Multiple dex files define Landroid/support/v7/app/ActionBar$DisplayOptions;    at com.android.dx.merge.DexMerger.readSortableTypes(DexMerger.java:591)    at com.android.dx.merge.DexMerger.getSortedTypes(DexMerger.java:546)    at com.android.dx.merge.DexMerger.mergeClassDefs(DexMerger.java:528)    at com.android.dx.merge.DexMerger.mergeDexes(DexMerger.java:164)    at com.android.dx.merge.DexMerger.merge(DexMerger.java:188)    at com.android.dx.command.dexer.Main.mergeLibraryDexBuffers(Main.java:504)    at com.android.dx.command.dexer.Main.runMonoDex(Main.java:334)    at com.android.dx.command.dexer.Main.run(Main.java:277)    at com.android.dx.command.dexer.Main.main(Main.java:245)    at com.android.dx.command.Main.main(Main.java:106)Error:Execution failed for task ‘:app:dexDebug‘.> com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException:
 Process ‘command ‘C:\Program Files\Java\jdk1.8.0_73\bin\java.exe‘‘ finished with non-zero exit value 2

 

解決方案：

 

Android 多個DEX錯誤 Multiple dex files define Landroid/support/v7/app/ActionBar$DisplayOptions;