Android Studio + Volley = NoClassDefFound?

问题描述

好吧，我决定同时试用适用于 Android 的 Volley 网络库和新的 Android Studio IDE.不过，我遇到了一些问题.

我构建了 volley.jar，将其复制到我的 libs 文件夹中以用于新项目，编辑 build.gradle 以包含 volley，并在我的主要活动中设置静态 ImageLoader 和 RequestQueue.但是，当我将应用程序加载到模拟器 (4.2) 上时，我最终得到了

E/AndroidRuntime:致命异常:主要java.lang.NoClassDefFoundError: com.android.volley.toolbox.Volley

按如下方式调用 Volley 时:

queue = Volley.newRequestQueue(this);

Gradle 编辑以支持库:

依赖{编译文件('libs/android-support-v4.jar')编译文件('libs/volley.jar')}

有人介意给我指出正确的方向吗?

解决方案

异常 java.lang.NoClassDefFoundError: com.google.android.gms.common.AccountPicker

在这里找到修复.

基本上，打开命令提示符(或终端)并导航到您的项目目录.在 Windows 上使用以下命令:

对于 Windows 用户:gradlew.bat 干净

对于 ma​​c 用户输入:./gradlew clean

然后重新加载 Android Studio 并重试！

Well, I decided to try out the Volley networking library for Android and the new Android Studio IDE at the same time.. However, I'm running into some problems.

I built volley.jar, copied it into my libs folder for a new project, edited build.gradle to include volley, and setup a static ImageLoader and RequestQueue in my main activity. However, when I load the app onto an emulator (4.2), I end up getting

E/AndroidRuntime: FATAL EXCEPTION: main
        java.lang.NoClassDefFoundError: com.android.volley.toolbox.Volley

when invoking Volley as follows:

        queue = Volley.newRequestQueue(this);

Gradle edits to support the library:

dependencies {
    compile files('libs/android-support-v4.jar')
    compile files('libs/volley.jar')
}

Anyone mind pointing me in the right direction?

解决方案

Exception java.lang.NoClassDefFoundError: com.google.android.gms.common.AccountPicker

Found the fix here.

Basically, open a command prompt (or terminal) and navigate to your project directory. Use the following command on Windows:

For Windows users:gradlew.bat clean

And for mac users type: ./gradlew clean

Then reload Android Studio and try again!

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