SImple example for View Injection for a Android Application by using AspectJ

ActivityInjectionAspect.java

@Aspect
public class ActivityInjectionAspect {

    @Before("execution(* android.app.Activity.onCreate(..)) && within(@com.thoughtsonmobile.example.aspectj.Layout *)")
    public void beforeOnCreate(JoinPoint joinPoint) {
        Activity activity = (Activity)joinPoint.getTarget();
        Layout layout = activity.getClass().getAnnotation(Layout.class);
        activity.setContentView(layout.value());
    }

}

DashboardActivity.java

@Layout(R.layout.dashboard)
public class DashboardActivity extends Activity {
  [..]
}