当我在android studio中生成签名的APK时，我得到了DexException

Question

直到我对代码进行了一些更改并尝试重新生成签名的APK之前，所有事情都很好。现在，当我尝试在android studio中生成代码时，我得到以下例外：

Error:Execution failed for task ':app:transformClassesWithDexForRelease'. 
> 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/commonsware/cwac/provider/StreamStrategy; 

这个例外对我而言是新鲜事。这是我的gradle文件和依赖关系

apply plugin: 'com.android.application' 

android { 
compileSdkVersion 25 
buildToolsVersion "25.0.2" 

aaptOptions { 
    noCompress 'pdf' 
} 
useLibrary 'org.apache.http.legacy' 

defaultConfig { 
    applicationId "com.user.plansmart" 
    minSdkVersion 15 
    targetSdkVersion 25 
    versionCode 23 
    versionName "1.2.6" 
    testInstrumentationRunner 
"android.support.test.runner.AndroidJUnitRunner" 
} 
buildTypes { 
    release { 
     minifyEnabled false 
     proguardFiles getDefaultProguardFile('proguard-android.txt'), 
'proguard-rules.pro' 
    } 
} 
} 

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('D:/AndroidStudioProjects/PlanSmart/libs/itextpdf-5.4.0.jar') 
compile files('D:/AndroidStudioProjects/PlanSmart/libs/cwac-provider- 
0.5.2.jar') 
compile files('D:/AndroidStudioProjects/PlanSmart/libs/volley.jar') 
compile 'com.android.support:appcompat-v7:25.3.1' 
compile 'com.android.support:design:25.3.1' 
compile 'com.google.android.gms:play-services-ads:11.2.0' 
compile 'com.readystatesoftware.sqliteasset:sqliteassethelper:+' 
compile 'com.android.support.constraint:constraint-layout:1.0.0-alpha7' 
compile 'com.commonsware.cwac:provider:0.5.2' 
compile 'com.mcxiaoke.volley:library:1.0.1' 
testCompile 'junit:junit:4.12' 
} 

错误的原因是什么？我无法弄清楚。谁能帮我吗。

Answer 1

从build.gradle中的依赖关系中删除行compile files('D:/AndroidStudioProjects/PlanSmart/libs/cwac-provider-0.5.2.jar')。

您已将其定义为compile 'com.commonsware.cwac:provider:0.5.2'

Answer 2

在gradle这个文件中添加此

configurations { 
compile.exclude group: 'com.commonsware' , module:'cwac' 
} 

Answer 3

添加multiDexEnabled true到defaultConfig块内的gradle的文件：

defaultConfig { 
    applicationId "com.user.plansmart" 
    minSdkVersion 15 
    targetSdkVersion 25 
    versionCode 23 
    versionName "1.2.6" 
    multiDexEnabled true 
    testInstrumentationRunner 
"android.support.test.runner.AndroidJUnitRunner" 
} 

Answer 4

在gradle文件中添加此行。

defaultConfig { 
    applicationId "com.user.plansmart" 
    minSdkVersion 15 
    targetSdkVersion 25 
    versionCode 23 
    versionName "1.2.6" 

    multiDexEnabled true 
} 

希望这会有所帮助。