Reference issue with android HelloGridView tutorial

The classes GridView and BaseAdapter class can not be resolved.

I added import android.widget.gridview, as well as import android.widget.baseadapter. But now setAdapter() is becoming not valid, and neither is setOnItemClickListener(OnItemClickListener).

Should I create a public class ImageAdapter in its own ImageAdapter.java file?

I believ开发者_StackOverflow中文版e the tutorials did not explain all the stuff clearly.

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The tutorials suppose you already know some Java, and your environment is setup properly. If you cannot resolve your imports, it's not a Android issue, but your Eclipse/SDK setup that you should check.

You also definitely should create one file per public class.