Populating a spinner used in more than two activities - android-actionbar

Question

I have an action bar spinner and two Activities in my app. The spinner, which is populated from a database, needs to be visible in both my activities. How should I generate it without duplicating my code? Should I create a static method or something else?
private NotesDbAdapter mDbHelper;
private List<String> listUniqueCat;
int selectedPos;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_joke_details);
mDbHelper = new NotesDbAdapter(this);
mDbHelper.open();
//this method returns list of strings from a database
listUniqueCat = mDbHelper.getUniqueCategories();
// create an array adapter to popluate dropdown list
ArrayAdapter<String> adapter = new ArrayAdapter<String>(
getBaseContext(),
android.R.layout.simple_spinner_dropdown_item, listUniqueCat);
// enable dropdown list naaavigation in action bar
getActionBar().setNavigationMode(ActionBar.NAVIGATION_MODE_LIST);
// defining navigation listiner
ActionBar.OnNavigationListener navigationListener = new OnNavigationListener() {
#Override
public boolean onNavigationItemSelected(int itemPosition, long itemId)
{
selectedPos = getActionBar().getSelectedNavigationIndex();
Toast.makeText(getBaseContext(), "selected index is "+ selectedPos ,
Toast.LENGTH_LONG).show();
return false;
}
};
// setting dropdown items and item navigation listener for action bar
getActionBar().setListNavigationCallbacks(adapter, navigationListener);
}

Answer 1

I think you need to create one BaseActivity with tabs like
abstract public class BaseActivity extends FragmentActivity {
}
and all other activities extends BaseActivity
small example for you
BaseActivity.java
abstract public class BaseActivity extends Activity implements TabListener {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_first);
ActionBar actionBar = getActionBar();
// add tabs to actionbar
actionBar.addTab(actionBar.newTab().setText("TAB 1")
.setTabListener(this));
actionBar.addTab(actionBar.newTab().setText("TAB 2")
.setTabListener(this));
}
}
FirstActivity.java
public class FirstActivity extends BaseActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_first);
}
#Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
#Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
Toast.makeText(getApplicationContext(),
tab.getText() + " selected in FirstActivity",
Toast.LENGTH_SHORT).show();
}
#Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
}
SecondActivity.java
public class SecondActivity extends BaseActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_first);
}
#Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
#Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
Toast.makeText(getApplicationContext(),
tab.getText() + " selected in SectondActivity",
Toast.LENGTH_SHORT).show();
}
#Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
}