如何实现导航抽屉

Question

我已经跟随android开发者网站构建了导航抽屉，但似乎无法找到如何为每个部分实现单独的活动/片段。我到目前为止的代码如下：

@Override
public void onNavigationDrawerItemSelected(int position) {
    FragmentManager fragmentManager = getSupportFragmentManager();
    fragmentManager
            .beginTransaction()
            .replace(R.id.container,
                    PlaceholderFragment.newInstance(position + 1)).commit();
}

实现操作栏标签菜单时，我使用的代码如下：

@Override
    public Fragment getItem(int index) {
        switch (index) {
        case 0:
            return new FirstTabFragment();
        case 1:
            return new SecondTabFragment();
        case 2:
        }
        return null;
    }

我尝试了第二个示例代码的大约20种不同的实现，试图让它与导航抽屉而不是操作栏标签一起使用。任何能指出我正确方向的人都会对我有所帮助。

以下是整个MainActivity.java文件，以防万一。

public class MainActivity extends ActionBarActivity implements
    NavigationDrawerFragment.NavigationDrawerCallbacks {


private NavigationDrawerFragment mNavigationDrawerFragment;


private CharSequence mTitle;

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

    mNavigationDrawerFragment = (NavigationDrawerFragment) getSupportFragmentManager()
            .findFragmentById(R.id.navigation_drawer);
    mTitle = getTitle();

    mNavigationDrawerFragment.setUp(R.id.navigation_drawer,
            (DrawerLayout) findViewById(R.id.drawer_layout));
}

@Override
public void onNavigationDrawerItemSelected(int position) {
    FragmentManager fragmentManager = getSupportFragmentManager();
    fragmentManager
            .beginTransaction()
            .replace(R.id.container,
                    PlaceholderFragment.newInstance(position + 1)).commit();
}

public void onSectionAttached(int number) {
    switch (number) {
    case 1:
        mTitle = getString(R.string.title_section1);
        break;
    case 2:
        mTitle = getString(R.string.title_section2);
        break;
    case 3:
        mTitle = getString(R.string.title_section3);
        break;
    case 4:
        mTitle = getString(R.string.title_section4);
        break;
    case 5:
        mTitle = getString(R.string.title_section5);
        break;
    case 6:
        mTitle = getString(R.string.title_section6);
        break;
    case 7:
        mTitle = getString(R.string.title_section7);
        break;
    case 8:
        mTitle = getString(R.string.title_section8);
        break;
    case 9:
        mTitle = getString(R.string.title_section9);
        break;
    case 10:
        mTitle = getString(R.string.title_section10);
        break;
    }
}

public void restoreActionBar() {
    ActionBar actionBar = getSupportActionBar();
    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
    actionBar.setDisplayShowTitleEnabled(true);
    actionBar.setTitle(mTitle);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    if (!mNavigationDrawerFragment.isDrawerOpen()) {

        getMenuInflater().inflate(R.menu.main, menu);
        restoreActionBar();
        return true;
    }
    return super.onCreateOptionsMenu(menu);
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    int id = item.getItemId();
    if (id == R.id.action_settings) {
        return true;
    }
    return super.onOptionsItemSelected(item);
}

public static class PlaceholderFragment extends Fragment {

    private static final String ARG_SECTION_NUMBER = "section_number";

    public static PlaceholderFragment newInstance(int sectionNumber) {
        PlaceholderFragment fragment = new PlaceholderFragment();
        Bundle args = new Bundle();
        args.putInt(ARG_SECTION_NUMBER, sectionNumber);
        fragment.setArguments(args);
        return fragment;
    }

    public PlaceholderFragment() {
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_main, container,
                false);
        TextView textView = (TextView) rootView
                .findViewById(R.id.section_label);
        textView.setText(Integer.toString(getArguments().getInt(
                ARG_SECTION_NUMBER)));
        return rootView;
    }

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        ((MainActivity) activity).onSectionAttached(getArguments().getInt(
                ARG_SECTION_NUMBER));
    }
}

}

Answer 1

这是一个很好的教程。

http://www.androidhive.info/category/navigation-drawer/