Google App Engine Module Error：Task '：app：transformClassesWithDexForDebug' 的执行失败。> java.io.IOEx

Question

试图用谷歌应用程序引擎模块编译我的android应用程序，但这件该死的事情行不通。它以前工作过，但由于某种原因，在我清除了Android Studio缓存并重新启动后，它停止了编译。这是我得到的错误：

Error:Execution failed for task ':app:transformClassesWithDexForDebug'.
> java.io.IOException: Failed to delete /Users/Me/AndroidStudioProjects/MyCoolApp/app/build/intermediates/pre-dexed/debug/appengine-api-1.0-sdk-1.9.18_0179742441e08a2aeb8477eb85038e2130d180e7.jar

我检查了文件夹，上面的文件甚至不存在——那么它为什么要删除它呢？

我还试着用上面的名字放一个伪文件，希望它能起作用，但没有。

以下是我的渐变文件：

应用程序

apply plugin: 'com.android.application'
android {
    compileSdkVersion 23
    buildToolsVersion "23.0.2"
    defaultConfig {
        applicationId "com.me.mycoolapp"
        minSdkVersion 13
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}
dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.google.android.gms:play-services-gcm:8.4.0' //Needed for GCM
    testCompile 'junit:junit:4.12'
    compile project(path: ':backend', configuration: 'android-endpoints')
    compile 'com.android.support:appcompat-v7:23.1.1'
    compile 'com.android.support:design:23.1.1'
    compile project(':backend')
}
apply plugin: 'com.google.gms.google-services' // Needed for GCM

项目：

// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.0.0-alpha3'
        classpath 'com.google.gms:google-services:2.0.0-alpha3' // Needed for GCM
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}
allprojects {
    repositories {
        jcenter()
    }
}
task clean(type: Delete) {
    delete rootProject.buildDir
}

Answer 1

非常愚蠢，但出于某种原因（我不知道为什么）Android studio将这一行添加到我的文件中

compile project(':backend')

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.google.android.gms:play-services-gcm:8.4.0' //Needed for GCM
    testCompile 'junit:junit:4.12'
    compile project(path: ':backend', configuration: 'android-endpoints')
    compile 'com.android.support:appcompat-v7:23.1.1'
    compile 'com.android.support:design:23.1.1'
    //compile project(':backend') //DELETE THIS
}

伙计，安卓Studio+GAE模块这些天真的很烦人。。。

Answer 2

在build.gradle脚本中，设置dexOptions.javaMaxHeapSize配置

android {
            ...
            ...
    dexOptions {
        javaMaxHeapSize "4g"
    }
}