自定义导航抽屉中的字体

Question

在我的NavigationDrawerFragment.java中，我将导航抽屉文本设置为某种字体。但字体只会被设置为导航抽屉的第一项！我怎样才能解决这个问题？

这里是我的NavigationDrawerFragment.java：

public class NavigationDrawerFragment extends Fragment { 

private Activity activity; 

/** 
* Remember the position of the selected item. 
*/ 
private static final String STATE_SELECTED_POSITION = "selected_navigation_drawer_position"; 

/** 
* Per the design guidelines, you should show the drawer on launch until the user manually 
* expands it. This shared preference tracks this. 
*/ 
private static final String PREF_USER_LEARNED_DRAWER = "navigation_drawer_learned"; 

/** 
* A pointer to the current callbacks instance (the Activity). 
*/ 
private NavigationDrawerCallbacks mCallbacks; 

/** 
* Helper component that ties the action bar to the navigation drawer. 
*/ 
private ActionBarDrawerToggle mDrawerToggle; 

private DrawerLayout mDrawerLayout; 
private ListView mDrawerListView; 
private View mFragmentContainerView; 

private int mCurrentSelectedPosition = 0; 
private boolean mFromSavedInstanceState; 
private boolean mUserLearnedDrawer; 

public NavigationDrawerFragment() { 
    this.activity = activity; 
} 

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

    // Read in the flag indicating whether or not the user has demonstrated awareness of the 
    // drawer. See PREF_USER_LEARNED_DRAWER for details. 
    SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(getActivity()); 
    mUserLearnedDrawer = sp.getBoolean(PREF_USER_LEARNED_DRAWER, false); 

    if (savedInstanceState != null) { 
     mCurrentSelectedPosition = savedInstanceState.getInt(STATE_SELECTED_POSITION); 
     mFromSavedInstanceState = true; 
    } 

    // Select either the default item (0) or the last selected item. 
    selectItem(mCurrentSelectedPosition); 
} 

@Override 
public void onActivityCreated(Bundle savedInstanceState) { 
    super.onActivityCreated(savedInstanceState); 
    // Indicate that this fragment would like to influence the set of actions in the action bar. 
    setHasOptionsMenu(true); 
} 

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
         Bundle savedInstanceState) { 
    mDrawerListView = (ListView) inflater.inflate(
      R.layout.fragment_navigation_drawer, container, false); 
    mDrawerListView.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
     @Override 
     public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 
      selectItem(position); 
     } 
    }); 
    mDrawerListView.setAdapter(new NavigationDrawerAdapter(
      getActionBar().getThemedContext(), 
      R.layout.navigation_fragment_item, 
      R.id.navigation_drawer_text, 
      new String[]{ 
        getString(R.string.title_section1), 
        getString(R.string.title_section2), 
        getString(R.string.app_name_listened), 
        getString(R.string.radios), 
        getString(R.string.app_name_watch), 
        getString(R.string.app_name_local), 
        getString(R.string.news), 
        getString(R.string.settings), 
        getString(R.string.about), 
      } 
    )); 
    mDrawerListView.setItemChecked(mCurrentSelectedPosition, true); 
    return mDrawerListView; 




} 

public boolean isDrawerOpen() { 
    return mDrawerLayout != null && mDrawerLayout.isDrawerOpen(mFragmentContainerView); 
} 

/** 
* Users of this fragment must call this method to set up the navigation drawer interactions. 
* 
* @param fragmentId The android:id of this fragment in its activity's layout. 
* @param drawerLayout The DrawerLayout containing this fragment's UI. 
*/ 
public void setUp(int fragmentId, DrawerLayout drawerLayout) { 
    mFragmentContainerView = getActivity().findViewById(fragmentId); 
    mDrawerLayout = drawerLayout; 

    // set a custom shadow that overlays the main content when the drawer opens 
    mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START); 
    // set up the drawer's list view with items and click listener 

    ActionBar actionBar = getActionBar(); 
    actionBar.setDisplayHomeAsUpEnabled(true); 
    actionBar.setHomeButtonEnabled(true); 


    // ActionBarDrawerToggle ties together the the proper interactions 
    // between the navigation drawer and the action bar app icon. 
    mDrawerToggle = new ActionBarDrawerToggle(
      getActivity(),     /* host Activity */ 
      mDrawerLayout,     /* DrawerLayout object */ 
      R.drawable.ic_drawer_material_white_midhigh,    /* nav drawer image to replace 'Up' caret */ 
      R.string.navigation_drawer_open, /* "open drawer" description for accessibility */ 
      R.string.navigation_drawer_close /* "close drawer" description for accessibility */ 
    ) { 
     @Override 
     public void onDrawerClosed(View drawerView) { 
      super.onDrawerClosed(drawerView); 
      if (!isAdded()) { 
       return; 
      } 

      getActivity().invalidateOptionsMenu(); // calls onPrepareOptionsMenu() 
     } 

     @Override 
     public void onDrawerOpened(View drawerView) { 
      super.onDrawerOpened(drawerView); 
      if (!isAdded()) { 
       return; 
      } 

      if (!mUserLearnedDrawer) { 
       // The user manually opened the drawer; store this flag to prevent auto-showing 
       // the navigation drawer automatically in the future. 
       mUserLearnedDrawer = true; 
       SharedPreferences sp = PreferenceManager 
         .getDefaultSharedPreferences(getActivity()); 
       sp.edit().putBoolean(PREF_USER_LEARNED_DRAWER, true).apply(); 
      } 

      getActivity().invalidateOptionsMenu(); // calls onPrepareOptionsMenu() 
     } 
    }; 

    // If the user hasn't 'learned' about the drawer, open it to introduce them to the drawer, 
    // per the navigation drawer design guidelines. 
    if (!mUserLearnedDrawer && !mFromSavedInstanceState) { 
     mDrawerLayout.openDrawer(mFragmentContainerView); 
    } 

    // Defer code dependent on restoration of previous instance state. 
    mDrawerLayout.post(new Runnable() { 
     @Override 
     public void run() { 
      mDrawerToggle.syncState(); 
     } 
    }); 

    mDrawerLayout.setDrawerListener(mDrawerToggle); 



} 

private void selectItem(int position) { 
    mCurrentSelectedPosition = position; 
    if (mDrawerListView != null) { 
     mDrawerListView.setItemChecked(position, true); 
    } 
    if (mDrawerLayout != null) { 
     mDrawerLayout.closeDrawer(mFragmentContainerView); 
    } 
    if (mCallbacks != null) { 
     mCallbacks.onNavigationDrawerItemSelected(position); 
    } 
} 

@Override 
public void onAttach(Activity activity) { 
    super.onAttach(activity); 
    try { 
     mCallbacks = (NavigationDrawerCallbacks) activity; 
    } catch (ClassCastException e) { 
     throw new ClassCastException("Activity must implement NavigationDrawerCallbacks."); 
    } 
} 

@Override 
public void onDetach() { 
    super.onDetach(); 
    mCallbacks = null; 
} 

@Override 
public void onSaveInstanceState(Bundle outState) { 
    super.onSaveInstanceState(outState); 
    outState.putInt(STATE_SELECTED_POSITION, mCurrentSelectedPosition); 
} 

@Override 
public void onConfigurationChanged(Configuration newConfig) { 
    super.onConfigurationChanged(newConfig); 
    // Forward the new configuration the drawer toggle component. 
    mDrawerToggle.onConfigurationChanged(newConfig); 
} 

@Override 
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { 
    // If the drawer is open, show the global app actions in the action bar. See also 
    // showGlobalContextActionBar, which controls the top-left area of the action bar. 
    if (mDrawerLayout != null && isDrawerOpen()) { 
     inflater.inflate(R.menu.global, menu); 
     showGlobalContextActionBar(); 
    } 
    super.onCreateOptionsMenu(menu, inflater); 
} 

@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
    if (mDrawerToggle.onOptionsItemSelected(item)) { 
     return true; 
    } 

    return super.onOptionsItemSelected(item); 
} 

/** 
* Per the navigation drawer design guidelines, updates the action bar to show the global app 
* 'context', rather than just what's in the current screen. 
*/ 
private void showGlobalContextActionBar() { 
    ActionBar actionBar = getActionBar(); 
    actionBar.setDisplayShowTitleEnabled(true); 
    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD); 
    //actionBar.setTitle(R.string.app_name); 


    TextView navtext = (TextView) getActivity().findViewById(R.id.navigation_drawer_text); 
    Typeface tf = TypefaceUtil.getAndCache(getActivity(), "Lato-Semibold.ttf"); 
    navtext.setTypeface(tf); 

} 

@Override 
public void onPrepareOptionsMenu(Menu menu) { 
    super.onPrepareOptionsMenu(menu); 

} 

private ActionBar getActionBar() { 
    return getActivity().getActionBar(); 
} 

/** 
* Callbacks interface that all activities using this fragment must implement. 
*/ 
public static interface NavigationDrawerCallbacks { 
    /** 
    * Called when an item in the navigation drawer is selected. 
    */ 
    void onNavigationDrawerItemSelected(int position); 
} 

}

Answer 1

一般来说，当我需要应用字体样式文本视图。我是这样做的。

1. 将您的字体文件* .ttf放入资产文件夹中。
2. 声明一个私有成员在片段类是这样的：

私人字样AVENIR = NULL;

在你的onCreate方法，初始化该构件是这样的：

AVENIR = Typeface.createFromAsset（getActivity（）getAssets（）， “avenir.ttf”）;

在你onCreateView方法，充气布局之后，可以应用的字体类型为 “navigation_drawer_text”：

View view = inflater.inflate(R.layout.fragment_layout, container, false); 
tvNavigationDrawerText = (TextView) view.findViewById(R.id.navigation_drawer_text); 
tvNavigationDrawerText.setTypeface(avenir); 

希望这有助于。