Show dropdown programmatically in ActionBar / ActionBarSherlock

Question

I have an activity using ActionBarSherlock with ActionBar.NAVIGATION_MODE_LIST.

When entering the page I want the spinner in the action bar

Answer 1

The best and easy way to implement this functionality by extending StringAdapter if you are using it. Otherwise you can take any adapter whichever you are using.

Steps :

• create an adapter

     class ListNavigationAdapter extends ArrayAdapter{
  
  public Spinner mSpinner; // This is the spinner which is used in actionbar
  
  public ListNavigationAdapter(Context context,
          int resource,
          int textViewResourceId, 
          String[] objects) {
      super(context, resource, 
              textViewResourceId, objects);
      // TODO Auto-generated constructor stub
  }
  
  @Override
  public View getView(int position, 
          View convertView, 
          ViewGroup parent) {
      // TODO Auto-generated method stub
  
      mSpinner = (Spinner) parent;
  
      return super.getView(position, convertView, parent);
  }
  

  }

• set an adapter to actionbar

// Set up the action bar to show a dropdown list.
    actionBar = getSupportActionBar();
    actionBar.setDisplayShowTitleEnabled(false);
    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_LIST);

    // Set up the dropdown list navigation in the action bar.
    actionBar.setListNavigationCallbacks(
            // Specify a SpinnerAdapter to populate the dropdown list.
          mAdapter = new ListNavigationAdapter(
                    actionBar.getThemedContext(),
                    android.R.layout.simple_list_item_1,
                    android.R.id.text1,
                    new String[] {
                            getString(R.string.title_1),
                            getString(R.string.title_2)
                    }),
            this);

• if you want to open it as screen open, just use below mentioned code

@Override public boolean onCreateOptionsMenu(Menu menu) {

    // Inflate the menu; this adds items to the action bar if it is present.
    ...........

    if(mAdapter.mSpinner != null){
      mAdapter.mSpinner.performClick();
    }
    return true;
}

Try this . It works (Y)