Benefits of the New API - Learn OpenGL ES: For Mobile Game and Graphics Development - page 24

Figure 1-18. GLES20Renderer class implementing interface GLSurfaceView.Renderer
After Android has created our Renderer class ( Figure 1-19 ), you might observe warn-
ings in the Problems view, depending on the ADT version you are using. These in-
clude:
▪ The import android.support.v4.app.NavUtils is nev-
er used.
▪ The import android.view.Menu is never used.
▪ The import android.view.MenuItem is never used.