android - Android Studio Gradle构建错误:不允许字符串类型(在 'activity_horizontal_margin'处，值为 '')

Question

刚刚下载了Android Studio。逐字跟随this教程。尝试“构建”时，请继续遇到以下错误，并且我不知道如何克服它。

Information:Gradle tasks [:app:generateDebugSources, :app:generateDebugAndroidTestSources, :app:mockableAndroidJar, :app:prepareDebugUnitTestDependencies, :app:compileDebugSources, :app:compileDebugAndroidTestSources, :app:compileDebugUnitTestSources]
C:\Users\SV\AndroidStudioProjects\ToDoApp\app\build\intermediates\res\merged\debug\values\values.xml
Error:(872, 69) String types not allowed (at 'activity_horizontal_margin' with value '').
Error:(872, 69) String types not allowed (at 'activity_horizontal_margin' with value '').
Error:Execution failed for task ':app:processDebugResources'.
> com.android.ide.common.process.ProcessException: Failed to execute aapt
Information:BUILD FAILED
Information:Total time: 1.429 secs
Information:3 errors
Information:0 warnings
Information:See complete output in console

Answer 1

如果您还没有values文件夹，请在其中创建一个名为dimens.xml的文件。然后在其中添加以下代码:

<resources>
    <!-- Default screen margins, per the Android Design guidelines. -->
    <dimen name="activity_horizontal_margin">16dp</dimen>
    <dimen name="activity_vertical_margin">16dp</dimen>
</resources>