多个dex文件定义landroid/support/v4/accessibilityService/accessibilityServiceInfoCompat

Question

UNEXPECTED TOP-LEVEL EXCEPTION:
com.android.dx.util.DexException: Multiple dex files define Landroid/support/v4/accessibilityservice/AccessibilityServiceInfoCompat$AccessibilityServiceInfoVersionImpl;
    at com.android.dx.merge.DexMerger.readSortableTypes(DexMerger.java:592)
    at com.android.dx.merge.DexMerger.getSortedTypes(DexMerger.java:550)
    at com.android.dx.merge.DexMerger.mergeClassDefs(DexMerger.java:531)
    at com.android.dx.merge.DexMerger.mergeDexBuffers(DexMerger.java:168)
    at com.android.dx.merge.DexMerger.merge(DexMerger.java:186)
    at com.android.dx.command.dexer.Main.mergeLibraryDexBuffers(Main.java:300)
    at com.android.dx.command.dexer.Main.run(Main.java:232)
    at com.android.dx.command.dexer.Main.main(Main.java:174)
    at com.android.dx.command.Main.main(Main.java:91)

如果我grep v4，我会在构建文件夹中看到两个文件。

Binary file build/pre-dexed/debug/support-v4-19.0.0-2ba5fdd60a6c3836b3104a863fe42897da1fa9d1.jar matches
Binary file build/pre-dexed/debug/support-v4-r7-227d905d79b23b20866531d4f700446c040a2ccb.jar matches

我的gradle文件只包括以下支持库：

compile 'com.android.support:support-v13:19.0.0'

我很难理解r7库是如何被包括在内的。我运行了gradle clean，当我重新运行AssembleDebug时，它总是出现在那里。

Binary file build/exploded-bundles/ComGoogleAndroidGmsPlayServices4030.aar/classes.jar matches

这是play services AAR bundle和v13库之间的不兼容吗？

 dependencies {


 // Google Play Services
//compile 'com.google.android.gms:play-services:4.0.30'

// Support Libraries
//compile 'com.android.support:support-v4:19.0.0'
///compile 'com.android.support:appcompat-v7:19.0.0'
//compile 'com.android.support:gridlayout-v7:19.0.0'
compile 'com.android.support:support-v13:19.0.0'
compile 'org.eclipse.mylyn.github:org.eclipse.egit.github.core:2.1.5'
compile 'commons-codec:commons-codec:1.9'
compile 'com.madgag:markdownj-core:0.4.1'
compile 'com.wu-man:android-oauth-client:0.0.2'
compile 'com.google.http-client:google-http-client-jackson2:1.17.0-rc'
compile 'org.apache.commons:commons-lang3:3.2'
compile 'com.google.code.gson:gson:2.2.4'
}

Answer 1

运行gradle-q dependencies（或gradle-q:projectname:dependencies)以生成依赖关系报告。您应该看到r7来自哪里，例如：

compile - Classpath for compiling the main sources.
+--- com.commonsware.cwac:camera-v9:0.5.4
|    +--- com.actionbarsherlock:actionbarsherlock:4.4.0
|    |    \--- com.google.android:support-v4:r7
|    +--- com.commonsware.cwac:camera:0.5.4
|    \--- com.android.support:support-v4:18.0.+ -> 18.0.0
\--- com.android.support:support-v4:18.0.+ -> 18.0.0

然后，使用exclude指令阻止该依赖项。在我的例子中，它来自我的CWAC相机库，所以我使用：

dependencies {
    compile('com.commonsware.cwac:camera-v9:0.5.4') {
      exclude module: 'support-v4'
    }

    compile 'com.android.support:support-v4:18.0.+'
}

（其中第二个compile语句指示您实际需要的版本）

compile - Classpath for compiling the main sources.
+--- com.commonsware.cwac:camera-v9:0.5.4
|    +--- com.actionbarsherlock:actionbarsherlock:4.4.0
|    \--- com.commonsware.cwac:camera:0.5.4
\--- com.android.support:support-v4:18.0.+ -> 18.0.0