how to fix 'NoClassDefFoundError: Failed resolution of: ActivityName'

Question

我的应用程序在开始时崩溃并生成以下错误。

The Google Play services resources were not found. Check your project configuration to ensure that the resources are included.

因此，为了修复错误，我将 build.gradle（项目级别）从

更改为

    classpath 'com.android.tools.build:gradle:3.1.2'
    classpath 'com.google.gms:google-services:3.0.0'
    classpath 'io.fabric.tools:gradle:1.25.4'`

到

classpath 'com.android.tools.build:gradle:3.1.4'
    classpath 'com.google.gms:google-services:4.1.0'
    classpath 'io.fabric.tools:gradle:1.25.4'

和build.gradle（应用级别）

implementation 'com.android.support:appcompat-v7:27.1.1'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
implementation 'com.android.support:support-v4:27.1.1'
implementation 'com.android.support:design:27.1.1'
implementation 'com.google.android.gms:play-services-gcm:11.8.0'
implementation 'com.google.firebase:firebase-core:11.8.0'
implementation 'com.google.firebase:firebase-crash:11.8.0'
implementation 'com.google.firebase:firebase-auth:11.8.0'
implementation 'com.crashlytics.sdk.android:crashlytics:2.9.3'

至

implementation 'com.android.support:appcompat-v7:27.1.1'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
implementation 'com.android.support:support-v4:27.1.1'
implementation 'com.android.support:design:27.1.1'
implementation 'com.google.android.gms:play-services-gcm:15.0.1'
implementation 'com.google.firebase:firebase-core:16.0.3'
implementation 'com.google.firebase:firebase-crash:11.8.0'
implementation 'com.google.firebase:firebase-auth:11.8.0'
implementation 'com.crashlytics.sdk.android:crashlytics:2.9.5'

更改以上 gradle 代码后，我的项目运行很好，没有出现以下错误。

The Google Play services resources were not found. Check your project configuration to ensure that the resources are included.

但是上面的 gradle 更改产生了另一个错误，当我们从一个调用到另一个我无法解决的 activity 时，它是在运行时创建的，如下所示。

java.lang.NoClassDefFoundError: Failed resolution of: Lcom/..../insta/InstaSplashActivity;

这里，InstaSplashActivity 是一个 activity，将从第一个 activity 开始调用，这会造成崩溃。

Answer 1

基于 documentation，这是抛出的：

If the Java Virtual Machine or a ClassLoader instance tries to load in the definition of a class (as part of a normal method call or as part of creating a new instance using the new expression) and no definition of the class could be found.

这里提供了解决方案 SO post:

Go to "Properties" of the project.

Select "Java Build Path"

Select "Order and Export" Tab

You should see the selected project's "src" and "gen" paths and dependencies here.

The order how they listed were first "src" and then "gen" path

I switch them, so that "gen" folder is build before the "src"

gen - automated code in project (from dependencies and references)

src - source code in project

or

Try going to Project -> Properties -> Java Build Path -> Order & Export and ensure Android Private Libraries are checked for your project and for all other library projects you are using.

Answer 2

删除你的行

implementation 'com.google.android.gms:play-services-gcm:15.0.1'

构建项目

添加这一行

implementation 'com.google.android.gms:play-services:3.2.+'

重新构建

还是不行，通过模块设置中的依赖添加你的行

Answer 3

只需卸载 quick-heal 即可解决此问题。

quick-heal 不允许运行 dex 文件，在运行ning 时它会自动修复 android 工作室的一些后端文件所以，android studio 无法正确获取文件，所以我完全删除了 quick-heal，现在我的项目运行良好:)

how to fix 'NoClassDefFoundError: Failed resolution of: ActivityName'

how to fix 'NoClassDefFoundError: Failed resolution of: ActivityName'

android

runtime-error

gradle

google-play-services