在Android Studio中定義多個dex文件

Question

我知道這是一個常見問題，但我已經檢查了所有其他帖子，並沒有一個幫助。它們中的很多是用於eclipse的，而android studio的不起作用。

Error:Execution failed for task ':app:transformClassesWithDexForDebug'. 
> com.android.build.api.transform.TransformException: com.android.ide.common.process.ProcessException: java.util.concurrent.ExecutionException: com.android.dex.DexException: Multiple dex files define Lcom/android/volley/VolleyError; 

我已經試過什麼：

• 搜索通過重複VolleyError（只有一個VolleyError.java和一個VolleyError.class）文件。
從GitHub
• 重新導入項目
• 從GitHub下載然後從AS
• 刪除並重新安裝的Android的全新副本工作室開放

首先，我得到的，它是一個存儲庫中的錯誤，但沒有混帳，所以我只是刪除凌空（爲我的隊友工作）。然後，當所有其他4名成員開始工作時，我的攤位和蟲子都在那裏工作。還有4個警告，一個是下面，其餘的都是相似的：

Warning:warning: Ignoring InnerClasses attribute for an anonymous inner class 
(org.apache.commons.logging.impl.WeakHashtable$1) that doesn't come with an 
associated EnclosingMethod attribute. This class was probably produced by a 
compiler that did not target the modern .class file format. The recommended 
solution is to recompile the class from source, using an up-to-date compiler 
and without specifying any "-target" type options. The consequence of ignoring 
this warning is that reflective operations on this class will incorrectly 
indicate that it is *not* an inner class. 

如果有幫助，這是下面的gradle這個文件：

apply plugin: 'com.android.application' 

dependencies { 

    compile fileTree(include: ['*.jar'], dir: 'libs') 
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', { 
     exclude group: 'com.android.support', module: 'support-annotations' 
    }) 
    compile files('libs/commons-logging-1.2.jar') 
    compile files('libs/com.fasterxml.jackson.databind.jar') 
    compile files('libs/gson-2.3.1.jar') 
    compile files('libs/httpclient-4.5.1.jar') 
    compile files('libs/httpcore-4.4.3.jar') 
    compile files('libs/jackson-core-2.7.1.jar') 
    compile files('libs/sun.misc.BASE64Decoder.jar') 
    compile files('libs/jackson-annotations-2.7.1.jar') 
    compile files('libs/jackson-databind-2.7.1-1.jar') 
    compile 'com.android.support:appcompat-v7:25.3.0' 
    compile 'com.android.support.constraint:constraint-layout:1.0.2' 
    compile 'com.mcxiaoke.volley:library-aar:1.0.0' 
    compile 'com.android.volley:volley:1.0.0' 
    compile 'com.android.support:recyclerview-v7:25.3.0' 
    compile 'com.android.support:gridlayout-v7:25.3.0' 
    compile 'com.android.support:cardview-v7:25.3.0' 
    compile 'com.android.support:design:25.3.0' 
    compile 'com.android.volley:volley:1.0.0' 
    testCompile 'junit:junit:4.12' 
} 

android { 
    compileSdkVersion 25 
    buildToolsVersion "25.0.2" 

    defaultConfig { 
     applicationId "com.csc301.team7.era" 
     minSdkVersion 15 
     targetSdkVersion 25 
     versionCode 1 
     versionName "1.0" 
     testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" 
    } 
    buildTypes { 
     release { 
      minifyEnabled false 
      proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' 
     } 
    } 

    packagingOptions { 
     exclude 'META-INF/DEPENDENCIES.txt' 
     exclude 'META-INF/LICENSE.txt' 
     exclude 'META-INF/NOTICE.txt' 
     exclude 'META-INF/NOTICE' 
     exclude 'META-INF/LICENSE' 
     exclude 'META-INF/DEPENDENCIES' 
     exclude 'META-INF/notice.txt' 
     exclude 'META-INF/license.txt' 
     exclude 'META-INF/dependencies.txt' 
     exclude 'META-INF/LGPL2.1' 
    } 
} 

---

去除兩個額外的凌空行在gradle輪流給我這個錯誤gradle：

Error:Execution failed for task ':app:transformClassesWithDexForDebug'. 
> com.android.build.api.transform.TransformException: com.android.ide.common.process.ProcessException: java.util.concurrent.ExecutionException: com.android.dex.DexException: Multiple dex files define Lcom/fasterxml/jackson/databind/AbstractTypeResolver; 

但我找不到AbstractTypeResolver。

請幫助讓這個項目運行將不勝感激。

Answer 1

此錯誤：

Ignoring InnerClasses attribute for an anonymous inner class 

是一個問題，我有太多。使用Proguard時，這與內部類有關。它可以通過將以下內容添加到您的proguard文件來解決：

-keepattributes EnclosingMethod 
-keepattributes InnerClasses 

Proguard和內部類通常會導致問題。通過添加上面的代碼，您可以向Proguard指出它應該將內部類保留在原來的位置，而不是將它們視爲在它們自己的文件中。