Android Actionbar (ii): Actionbar Implement Tabs tags and drop-down navigation

I. Adding tags Tabs

Implementing a tab in ActionBar can implement Android.app.ActionBar.TabListener, overriding Ontabselected, Ontabunselected and ontabreselected methods to correlate fragment. The code is as follows:

2. Private class Mytablistener implements Actionbar.tablistener {
4. private tabcontentfragment mfragment;
6. Public Tablistener (tabcontentfragment fragment) {
8. Mfragment = fragment;
10. } @Override
12. public void ontabselected (Tab tab, fragmenttransaction ft) {
14. Ft.add (R.id.fragment_content, mfragment, null);
16. }
18. @Override
20. public void ontabunselected (Tab tab, fragmenttransaction ft) {
22. Ft.remove (mfragment);
24. }
26. @Override
28. public void ontabreselected (Tab tab, fragmenttransaction ft) {
30. }
34. }

Next we create actionbar in the activity, the code is as follows;

2. <strong>@Override
4. protected void OnCreate (Bundle savedinstancestate) {
6. Super.oncreate (savedinstancestate);
8. Setcontentview (R.layout.main);
10. Final ActionBar ActionBar = Getactionbar (); //Hint Getactionbar method must be behind Setcontentview
12. Actionbar.setnavigationmode (Actionbar.navigation_mode_tabs);
14. Actionbar.setdisplayoptions (0, Actionbar.display_show_title);
16. Fragment artistsfragment = new Artistsfragment ();
18. Actionbar.addtab (Actionbar.newtab (). SetText (r.string.tab_artists). Settablistener (new Tablistener (  (artistsfragment)));
20. Fragment albumsfragment = new Albumsfragment ();
22. Actionbar.addtab (Actionbar.newtab (). SetText (R.string.tab_albums). Settablistener (new Tablistener (  (albumsfragment)));
24. }</strong>

Two. Add the drop-down navigation drop-down Navigation:

Creating a Spinneradapter provides a drop-down option, and the tab mode is different drop-down only need to modify the Setnavigationmode mode, will Actionbar.navigation_mode_ Tabs changed to Actionbar.navigation_mode_list, and the final improved code is

1. <strong>actionbar ActionBar = Getactionbar ();
2. Actionbar.setnavigationmode (actionbar.navigation_mode_list);
3. Actionbar.setlistnavigationcallbacks (Mspinneradapter, Mnavigationcallback);</strong>

Above we bind a Spinneradapter control through the Setlistnavigationcallbacks method, the concrete Onnavigationlistener code example is;

2. <strong> Monnavigationlistener = new Onnavigationlistener () {
4. String[] strings = Getresources (). Getstringarray (R.array.action_list);
6. @Override
8. Public boolean onnavigationitemselected (int position, long itemId) {
10. Listcontentfragment newfragment = new Listcontentfragment ();
12. Fragmenttransaction ft = openfragmenttransaction ();
14. Ft.replace (R.id.fragment_container, Newfragment, strings[position]);
16. Ft.commit ();
18. return true;
20. }
24. };</strong>

And the code for the Listcontentfragment is:

2. Public class Listcontentfragment extends Fragment {
4. Private String MText;
8. @Override
10. Public void Onattach (activity activity) {
12. Super.onattach (activity);
14. MText = Gettag ();
16. }
20. @Override
22. Public View Oncreateview (layoutinflater inflater, ViewGroup container,
24. Bundle savedinstancestate) {
26. TextView Text = new TextView (Getactivity ());
28. Text.settext (MText);
30. return text;
32. }
34. }

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Android Actionbar (ii): Actionbar Implement Tabs tags and drop-down navigation