Question

我将android support-v7-appcompat导入我的工作区并显示错误

android support-v7-appcompat/gen(missing) 
in Properties --> Java Build Path -->Order and Export

我清理并重建但错误仍然存在

Answer 1

在您的项目属性中将目标更改为android-21.you应该拥有最新的api 21 sdk平台

Answer 2

添加此库：

使用Eclipse：

根据支持库代码创建库项目：

Make sure you have downloaded the Android Support Library using the SDK Manager.
1. Create a library project and ensure the required JAR files are included in the project's build path:
   2. Select File > Import.
   3. Select Existing Android Code Into Workspace and click Next.
   4. Browse to the SDK installation directory and then to the Support Library folder. For example, if you are adding the appcompat project, browse to <sdk>/extras/android/support/v7/appcompat/.
   5. Click Finish to import the project. For the v7 appcompat project, you should now see a new project titled android-support-v7-appcompat.
   6. In the new library project, expand the libs/ folder, right-click each .jar file and select Build Path > Add to Build Path. For example, when creating the the v7 appcompat project, add both the android-support-v4.jar and android-support-v7-appcompat.jar files to the build path.
   7. Right-click the library project folder and select Build Path > Configure Build Path.
   8. In the Order and Export tab, check the .jar files you just added to the build path, so they are available to projects that depend on this library project. For example, the appcompat project requires you to export both the android-support-v4.jar and android-support-v7-appcompat.jar files.
   9. Uncheck Android Dependencies.
   10.Click OK to complete the changes.

您现在拥有所选支持库的库项目，可以与一个或多个应用程序项目一起使用。

将库添加到您的应用程序项目中：

在项目浏览器中，右键单击项目并选择“属性”。
在对话框左侧的类别面板中，选择Android。
在“库”窗格中，单击“添加”按钮。
选择库项目，然后单击“确定”。例如，appcompat项目应列为android-support-v7-appcompat。
在属性窗口中，单击“确定”。

使用Android Studio：

Make sure you have downloaded the Android Support Repository using the SDK Manager.


1. Open the build.gradle file for your application.
2. Add the support library feature project identifier to the dependencies section. For example, to include the appcompat project add compile "com.android.support:appcompat-v7:18.0.+" to the dependencies section, as shown in the following example:

dependencies {
    ...
    compile "com.android.support:appcompat-v7:18.0.+"
}

android support-v7-appcompat / gen（缺失）

2 个答案: