same menu different activities

Question

I want to show the same menu (made with imageviews) on all my activies, and I try:

public class BaseActivity extends Activity {

    ImageView iv1;
    ...

    @Override
    protected void onCreate(Bundle savedInstanceState) {
    {
        super.onCreate(savedInstanceState);

        iv1 = (ImageView)findViewById(R.id.image1);
    }

    ...
}

and the others activities looks like:

public class PlayersActivity extends BaseActivity {
    protected void onCreate (Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
    }
}

But, the activities don't see the ImageView that I defined on the BaseActivity.
I have a null object with the imageview.

Answer 1

在基本活动或子类中，iv1始终为null，因为您从未调用过setContentView