Official tutorial codes appearing red wave line in Eclipse not allowing me to compile

I am a beginner in Android programming. I was going through the official tutorial on Android developer site. When I copied the codes for the Grid View tutorial to Eclipse, many red wave underlines appeared which are not allowing me to compile. Every time I click the run button, it says "Your project contains error(s), please fix them before running your application."

I am using a WIN7 and followed every single step that is necessary for setting up the envrionment. I had no problem at with previous tutorials such as Hello Android, Linear Layout, Relative Layout, and Table View.

Does anyone have the same experience and have a solution for this? I have tried to clean and re-build the project, which doesn开发者_开发百科't help.

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It would probably be helpful to provide a link to the gridview tutorial you speak of. I'll assume you meant this one: http://developer.android.com/resources/tutorials/views/hello-gridview.html

First things first: Did you download the sample art? Did you put it in res/drawable?

What errors were you getting?

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Are you certain you are working in an Android project and not a standard Java project?