Question

我有疯狂性，它扩展了FragmentActivity（带有片段的2个标签）。我需要在片段中放入以下listview acitivity。或者请告诉我如何使用这些资源制作列表片段。

public class MainActivity extends Activity {
    private static final String TAG = MainActivity.class.getSimpleName();

    private ListView List;
    // Navigation drawer title
    private CharSequence mDrawerTitle;
    private CharSequence mTitle;
    private List<Category> albumsList;
    private ArrayList<NavDrawerItem> navDrawerItems;
    private NavDrawerListAdapter adapter;

    @SuppressLint("NewApi")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        List = (ListView) findViewById(R.id.list_album);

        navDrawerItems = new ArrayList<NavDrawerItem>();


        // Getting the albums from shared preferences
        albumsList = AppController.getInstance().getPrefManger().getCategories();


         // Insert "Recently Added" in navigation drawer first position
        Category recentAlbum = new Category(null,
                getString(R.string.nav_drawer_recently_added));

        albumsList.add(0, recentAlbum);

        // Loop through albums in add them to navigation drawer adapter
        for (Category a : albumsList) {
            navDrawerItems.add(new NavDrawerItem(a.getId(), a.getTitle()));
        }

        // Setting the nav drawer list adapter
        adapter = new NavDrawerListAdapter(getApplicationContext(),
                navDrawerItems);
        List.setAdapter(adapter);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    /**
     * On menu item selected
     * */
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // toggle nav drawer on selecting action bar app icon/title

        // Handle action bar actions click
        switch (item.getItemId()) {
        case R.id.action_settings:
            // Selected settings menu item
            // launch Settings activity
            Intent intent = new Intent(MainActivity.this,
                    SettingsActivity.class);
            startActivity(intent);
            return true;
        default:
            return super.onOptionsItemSelected(item);
        }
    }
}

Answer 1

Fragment表示Activity中的行为或用户界面的一部分。您可以在单个活动中组合多个片段以构建多窗格UI，并在多个活动中重用片段。您可以将片段视为活动的模块化部分，它具有自己的生命周期，接收自己的输入事件，并且可以在活动运行时添加或删除。

片段由活动拥有，因此您无法将活动放入片段中。但你可以在片段中做类似的事情。例如：

public class MyListFragment extends Fragment {

    private ListView List;
    // Navigation drawer title
    private CharSequence mDrawerTitle;
    private CharSequence mTitle;
    private List<Category> albumsList;
    private ArrayList<NavDrawerItem> navDrawerItems;
    private NavDrawerListAdapter adapter;


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        // inflate your layout here
        View v = inflater.inflate(R.layout.activity_main, container, false);

        // find your listview
        List = (ListView) findViewById(v, R.id.list_album);
        navDrawerItems = new ArrayList<NavDrawerItem>();

        // just like what you do in your activity...

        return v;
    }
}

隐藏ListFragment中的活动

1 个答案: