无法在Android Studio中导入CardboardActivity？

Question

When trying to create a new Google Cardboard app, I'm unable to get my app to import the cardboard.jar and recognize CardboardActivity. I have placed cardboard.jar and libprotobuf-java-2.6-nano.jar in the libs directory and build.gradle includes the line compile fileTree(dir: 'libs', include: ['*.jar']) as a dependency. What's going on?

Answer 1

右键单击cardboard.jar然后选择“添加为库...”实际上会将包添加到项目中。