Android更改字体菜单项

我正在尝试将菜单项的字体更改为自定义字体。在我的操作栏中有一个下拉菜单，有几个选项。当我选择其中一个选项时，actionbar中项目的标题将更改为optiontext，并应用字体。这是因为我在覆盖的“onOptionItemSelected（MenuItem项）”中应用了te字体。我真的希望在创建菜单时应用字体（它现在使用默认字体）。因此，我尝试在“onCreateOptions菜单（菜单菜单菜单）”中执行此操作，但它始终给我一个错误（空指针异常）。我甚至尝试了多种重写方法，但似乎都不起作用。创建菜单项时，如何将自定义字体应用于该菜单项？这是我的密码：

        @Override
        public boolean onCreateOptionsMenu(Menu menu){
            Log.d("GraphActivity", "onCreateOptionsMenu");
            MenuInflater inflater = getMenuInflater();
            inflater.inflate(R.menu.menu_graph, menu);
            optionMenu = menu;
            Boolean dayMatch = User.getInstance().getDownloadedDay() == User.getInstance().getCurrentDay();
            Boolean monthMatch = User.getInstance().getDownloadedMonth() == User.getInstance().getCurrentMonth();
             Boolean yearMatch = User.getInstance().getDownloadedYear() == User.getInstance().getCurrentYear();
            if(! dayMatch || ! monthMatch || ! yearMatch){
                FeedbackManager feedbackManager = new FeedbackManager();
                feedbackManager.showToast("file is out of date", GraphActivity.this, Toast.LENGTH_SHORT);
                optionMenu.findItem(R.id.action_refresh).setIcon(R.drawable.ic_action_refreshed);
            }
            return true;
        }

        @Override
        public boolean onMenuOpened(int featureId, Menu menu){
            Typeface typeface = Typeface.createFromAsset(getAssets(), "TitilliumWeb-Regular.ttf");
            menuItemView = (TextView)findViewById(R.id.action_select);
            menuItemView.setTypeface(typeface);
            return super.onMenuOpened(featureId, menu);
        }

        @Override
        public boolean onCreatePanelMenu(int featureId, Menu menu)
        {
            Typeface typeface = Typeface.createFromAsset(getAssets(), "TitilliumWeb-Regular.ttf");
            menuItemView = (TextView)findViewById(R.id.action_select);
            menuItemView.setTypeface(typeface);
            return super.onCreatePanelMenu(featureId, menu);
        }

        @Override
        public boolean onOptionsItemSelected(MenuItem item){
            Log.d("GraphActivity", "onOptionsItemSelected");
            Typeface typeface = Typeface.createFromAsset(getAssets(), "TitilliumWeb-Regular.ttf");
            menuItemView = (TextView)findViewById(R.id.action_select);
            menuItemView.setTypeface(typeface);
            int id = item.getItemId();
            if(id == R.id.action_settings){
                Intent intent = new Intent(GraphActivity.this, SettingsActivity.class);
                startActivity(intent);
            }else if(id == R.id.action_refresh){
                if(itemClickable){
                    TaskManager taskManager = new TaskManager(GraphActivity.this, progressBar);
                    taskManager.runTask("online");
                }
            }else if(id == R.id.action_current){
                graphManager.setSelect(GraphManager.select_current);
                String title = optionMenu.findItem(R.id.action_current).getTitle().toString();
                optionMenu.findItem(R.id.action_select).setTitle(title);
                setSelectable(WEEK_button);
                setSelectable(MONTH_button);
                setClickable(YEAR_button);
                graph();
            }else if(id == R.id.action_previous){
                graphManager.setSelect(GraphManager.select_previous);
                String title = optionMenu.findItem(R.id.action_previous).getTitle().toString();
                optionMenu.findItem(R.id.action_select).setTitle(title);
                setSelectable(WEEK_button);
                setSelectable(MONTH_button);
                setClickable(YEAR_button);
                graph();
            }else if(id == R.id.action_compare){
                graphManager.setSelect(GraphManager.select_compare);
                graphManager.setPeriod(GraphManager.period_year);
                String title = optionMenu.findItem(R.id.action_compare).getTitle().toString();
                optionMenu.findItem(R.id.action_select).setTitle(title);
                setNonSelectable(WEEK_button);
                setNonSelectable(MONTH_button);
                setHighLight(YEAR_button);
                setNotClickable(YEAR_button);
                graph();
            }
            return super.onOptionsItemSelected(item);
        }

---

您可以自定义选项菜单，包括：

添加自定义字体

更改字体大小

更改字体颜色

将背景设置为可绘制资源（例如图像、边框、渐变）

要将背景更改为边框或渐变，您必须在

res

中创建一个名为

drawable

的资源文件夹，并在其中创建边框XML或渐变XML

这一切都可以通过编程方式完成，如下所示：

public class CustomMenu extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    public boolean onCreateOptionsMenu(android.view.Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.cool_menu, menu);
        getLayoutInflater().setFactory(new Factory() {
            public View onCreateView(String name, Context context,
                    AttributeSet attrs) {

                if (name.equalsIgnoreCase(
                        "com.android.internal.view.menu.IconMenuItemView")) {
                    try {
                        LayoutInflater li = LayoutInflater.from(context);
                        final View view = li.createView(name, null, attrs);
                        new Handler().post(new Runnable() {
                            public void run() {
                                // set the background drawable if you want that
                                //or keep it default -- either an image, border
                                //gradient, drawable, etc.
                                view.setBackgroundResource(R.drawable.myimage);
                                ((TextView) view).setTextSize(20); 

                                // set the text color
                                Typeface face = Typeface.createFromAsset(
                                        getAssets(),"OldeEnglish.ttf");     
                                ((TextView) view).setTypeface(face);
                                ((TextView) view).setTextColor(Color.RED);
                            }
                        });
                        return view;
                    } catch (InflateException e) {
                        //Handle any inflation exception here
                    } catch (ClassNotFoundException e) {
                        //Handle any ClassNotFoundException here
                    }
                }
                return null;
            }
        });
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
        case R.id.AboutUs:
            Intent i = new Intent("com.test.demo.ABOUT");
            startActivity(i);
            break;
        case R.id.preferences:
            Intent p = new Intent("com.test.demo.PREFS");
            startActivity(p);
            break;
        case R.id.exit:
            finish();
            break;
        }
        return false;
    }
}

不要忘记在

res

文件夹中创建名为

menu

的文件夹，并在

menu

文件夹中为菜单创建一个XML（例如cool\u menu.XML），如下所示：

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
    <item  android:title="about"android:id="@+id/AboutUs" /> 
    <item android:title="Prefs" android:id="@+id/preferences" /> 
    <item android:title="Exit" android:id="@+id/exit" /> 
</menu>

然后输出将如下所示：