Question

I have a base class which has a bunch of buttons that are going to be used on all my activities as a general navigation bar.

public abstract class GenericActivity extends Activity {

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main_menu);

    final Button buttonFinder = (Button) findViewById(R.id.buttonNavigationFinder);
    buttonFinder.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            Intent IndexActivity = new Intent(GenericActivity.this, Finder.class);     
            GenericActivity.this.startActivity(IndexActivity);
        }
    });

    final Button buttonIndex = (Button) findViewById(R.id.buttonNavigationIndex);
    buttonIndex.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            Intent IndexActivity = new Intent(GenericActivity.this, Index.class);     
            GenericActivity.this.startActivity(IndexActivity);
        }
    });

    final Button buttonStart = (Button) findViewById(R.id.buttonNavigationStart);
    buttonStart.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            Intent IndexActivity = new Intent(GenericActivity.this, MainMenu.class);     
            GenericActivity.this.startActivity(IndexActivity);
        }
    });       
}
}

I then inherit this activity in another activity

public class Index extends GenericActivity {

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.index);
}
}

The XML file of the index layout have buttons with the same IDs as the base class. When I start the Index activity my emulator crashes. Help!

EDIT: Stacktrace, but I cant seem to get the whole trace. Logcat shows “… 11 more” at the end
http://pastebin.com/v64RyG2S

Answer 1

Try this:

remove setContentView(R.layout.main_menu); from GenericActivity.

What main_menu.xml has?

and change these methods calls order on Index class:

@Override
public void onCreate(Bundle savedInstanceState) {
    setContentView(R.layout.index);
    super.onCreate(savedInstanceState);
}