Android Studio Gradle構建錯誤：字符串類型不允許（在'activity_horizo​​ntal_margin'值''）

Question

剛下載的Android Studio。逐字跟進this教程。嘗試「構建」時，請繼續運行以下錯誤，並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

裏面你values文件夾中創建一個文件調用它dimens.xml，如果你沒有一個了。然後添加以下代碼裏面：