添加标签视图android

Question

I have made a simple contact apps and now I wish to add tab view to this app. I am following the tutorial here . Below is part of the source code for my MainActivity.jave:

public class MainActivity extends ListActivity {

    private ListView contactListView;
    private CursorAdapter contactListViewAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        contactListView = getListView(); // get ListView id
        contactListView.setOnItemClickListener(viewContactListListener);

        String[] from = new String[] { "familyName" }; // built an String array
                                                        // named "from"
        int[] to = new int[] { R.id.contactTextView };
        contactListViewAdapter = new SimpleCursorAdapter(MainActivity.this,
                R.layout.contact_list_item, null, from, to);
        setListAdapter(contactListViewAdapter); // set adapter
    }

I tried to change "public class MainActivity extends ListActivity" to "public class MainActivity extends TabActivity implements OnTabChangeListener{". However, I get the error "The method getListView() is undefined for the type MainActivity" and other similar errors. I need suggestions on how to fix this. Thanks for any help.

Answer 1

ListActivity provides some help methods to manage ListView so if you want to change your parent activity from ListActivity to TabActivity you need to handle ListActivity behaviour yourself. Basically you need to get and store somewhere the ListView object. Something like mListView = (ListView) findViewById(android.R.id.list) on your onCreate method and then implement missing method

ListView getListView()
{
    return mListView;
}

Also setting your adapter will be a bit different. Instead of calling setListAdapter(contactListViewAdapter); // set adapter setListAdapter(contactListViewAdapter); // set adapter there should be contactListView.setAdapter(contactListViewAdapter);