使用库项目编译 android 项目失败，缺少 classes.jar [英] Compiling android project with a library project fails with missing classes.jar

问题描述

我正在制作一个依赖于 Android v7 appCompat 支持库的应用.当我尝试使用 Ant 构建项目时，我收到来自 dex 的错误消息，指出它无法从 appCompat 项目的 bin 目录中找到文件 classes.jar.这是我所做的:

I'm making an app that depends on the Android v7 appCompat support library. When I'm trying to build the project with Ant, I get an error from dex stating that it can't find the file classes.jar from the appCompat project's bin directory. Here's what I have done:

1. 我将 SDK 下的 appCompat 目录复制到我的项目中.它现在是与 libs、res、src 等一起的顶级目录之一.

2. 我将库添加到我的项目中:

1. I copied the appCompat directory under the SDK over to my project. It is now one of the top-level directories along with libs, res, src etc.

2. I added the library to my project:

android update project --target 1 --path . --library .\appCompat

(--target 1 指的是我系统上的 api 级别 22.)

(--target 1 refers to api level 22 on my system.)

我为 appCompat 项目生成了构建文件:

I generated build files for the appCompat project:

cd appCompat
android update lib-project --target 1 --path .

我回到我的项目并尝试构建它:

I went back to my project and attempted building it:

cd ..
ant clean debug

一切都很顺利，直到我得到以下信息:

Everything goes smoothly until I get the following:

-dex:
      [dex] input: C:\Users\Tuukka\Documents\app\bin\classes
      [dex] input: C:\Users\Tuukka\Documents\app\appcompat\bin\classes.jar
      [dex] input: C:\Users\Tuukka\Documents\app\appcompat\libs\android-support-v4.jar
      [dex] input: C:\Users\Tuukka\Documents\app\appcompat\libs\android-support-v7-appcompat.jar
      [dex] Pre-Dexing C:\Users\Tuukka\Documents\app\appcompat\libs\android-support-v4.jar -> android-support-v4-7d4b9d18b52617b1310b8c2397abe6b7.jar
      [dex] Pre-Dexing C:\Users\Tuukka\Documents\app\appcompat\libs\android-support-v7-appcompat.jar -> android-support-v7-appcompat-af2360631cde3dc57c1fde6f23204ddb.jar
      [dex] Converting compiled files and external libraries into C:\Users\Tuukka\Documents\app\bin\classes.dex...
       [dx]
       [dx] UNEXPECTED TOP-LEVEL EXCEPTION:
       [dx] java.io.FileNotFoundException: C:\Users\Tuukka\Documents\app\appcompat\bin\classes.jar (No such file or directory)

appCompat\bin 中确实没有classes.jar.事实上，在查看整个构建输出后，似乎从未构建过这种东西，但Ant似乎期望它存在.

There is indeed no classes.jar in appCompat\bin. In fact, after looking through the entire build output, it seems such a thing was never built, yet Ant seems to expect that it exists.

我在这里遗漏了什么吗?任何帮助将不胜感激.

Is there something I'm missing here? Any help would be greatly appreciated.

推荐答案

我认为这个问题是由于项目没有设置为库项目造成的.如果您手动设置所有内容，您可以通过将 android.library=true 添加到 [your project]/appCompat/project.properties 文件来解决此问题.

I think this problem is caused by the project not being set up as a library project. If you are setting up everything by hand you can fix this by adding android.library=true to the [your project]/appCompat/project.properties file.

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