NoClassDefFoundError的与Android工作室的安卓4.0

问题描述

我在把现有的应用程序从Eclipse中的Andr​​oid Studio的过程。然而，当我在一个设备运行4.x的（我已经在模拟器测试过几个版本）运行它，它立即崩溃一个的NoClassDefFoundError 。

I'm in the process of converting an existing app from Eclipse to Android Studio. However, when I run it on a device running 4.x (I've tested several versions on emulators), it immediately crashes with a NoClassDefFoundError.

我已经试过注释掉引用的类无法找到，但总有另一个。至于所知道的，有问题的类总是

I've tried commenting out references to the classes it can't find, but there's always another. As far as can tell, the offending class is always

1. 在我自己的code
2. 在一个内部类（更新：随着越来越多的调查，这个人是不是总是正确的）

1. Within my own code
2. An inner class (Update: With more investigation, this one isn't always true)

一切工作正常，在5.0.1仿真器（我没有设备来测试）。我的 build.gradle 文件是相当长的，但看起来是这样的：

Everything works fine on a 5.0.1 emulator (I don't have a device to test on). My build.gradle file is fairly long, but looks like this:

apply plugin: 'com.android.application'
apply plugin: 'android-apt'

def AAVersion = "2.7.1"

android {
    compileSdkVersion 19
    buildToolsVersion "21.1.1"

    defaultConfig {
        applicationId "com.myapp.android"
        minSdkVersion 8
        targetSdkVersion 19
        multiDexEnabled = true
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
        }
    }

    packagingOptions {
        *snip*
    }
}

buildscript {
    repositories {
        mavenCentral()

    }
    dependencies {
        classpath 'com.android.tools.build:gradle:1.0.0'
        classpath 'com.neenbedankt.gradle.plugins:android-apt:1.4'
    }
}

repositories {
    maven {
        url "https://repo.commonsware.com.s3.amazonaws.com"
    }
}

apt {
    arguments {
        androidManifestFile variant.outputs[0].processResources.manifestFile
        resourcePackageName 'com.pact.android'
    }
}

dependencies {
    *snip compile project(':...') declarations

    apt "com.googlecode.androidannotations:androidannotations:$AAVersion"
    compile "com.googlecode.androidannotations:androidannotations-api:$AAVersion"

    compile 'com.actionbarsherlock:actionbarsherlock:4.4.0@aar'
    compile 'com.android.support:support-v4:21.0.3'
    compile 'com.google.android.gms:play-services:3.1.36'

    *snip many more compile declarations*

    compile fileTree(dir: 'libs', include: ['*.jar'])
}

类的一些实例引起的麻烦：

Some examples of classes that cause trouble:

• 实现Facebook的库中的界面（库项目）匿名类
• Parcelable.CREATOR 在我的模型实施
• 在扩展android.os.Library内部类
• 在我自己的code内部类
• 在实现接口的库从行家的类

• An anonymous class that implements an interface inside the facebook library (as a library project)
• Parcelable.CREATOR implementations in my models
• An inner class that extends android.os.Library
• An inner class in my own code
• A class that implements an interface in a library from maven

什么错误，以及如何解决呢？

What's going wrong, and how do I fix it?

推荐答案

我不完全执行MultiDex的支持，所以我的一些类没有在正确的DEX文件。为了解决这个问题，你所要做的不仅仅是建立 multiDexEnabled = TRUE 在 defaultConfig 块。您还可以：

I was incompletely implementing MultiDex support, so some of my classes weren't in the proper dex file. To fix it, you have to do more than just set multiDexEnabled = true in your defaultConfig block. You also have to:

1. 包含在你的依赖编译com.android.support:multidex:1.0.0
2. 让您的应用程序类扩展的 MultiDexApplication 而不仅仅是应用程序。另外，您也可以致电 MultiDex.install（）在 attachBaseContext（）您的应用程序。

1. Include compile 'com.android.support:multidex:1.0.0' in your dependencies
2. Have your Application class extend MultiDexApplication instead of just Application. Alternatively, you can call MultiDex.install() in attachBaseContext() of your application.

请参阅https://developer.android.com/tools/building/multidex.html了解更多详情。

这篇关于NoClassDefFoundError的与Android工作室的安卓4.0的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！