如何为 NavigationView 中的项目设置自定义字体？

Question

使用新的 NavigationView，我们可以通过 XML 中的菜单资源设置抽屉的项目。

有了它，我们可以为每个项目设置类似

<item
  android:id="@+id/drawer_my_account"
  android:icon="@drawable/ic_my_account"
  android:title="@string/drawer_my_account" />

但是现在，我想为抽屉中的每一项设置自定义字体，但我无法通过 XML 或 Java 代码找到实现的方法.有办法吗？

Answer 1

Is there a way to do it?

是的。 NavigationView doesn't provide a direct way of handling this, but it can easily be achieved using View.findViewsWithText.

有两件事可以帮助我们处理这个问题。

每个 MenuItem 视图是一个 TextView。因此，这使得应用 Typeface 变得更加容易。有关 NavigationView 实际使用的 TextView 的更多信息，请参阅 NavigationMenuItemView。
NavigationView provides a callback 当 MenuItem 被选中时。我们将不得不为每个 MenuItem 提供一个唯一的 id，这个回调将帮助尽可能多地生成这些 id，这意味着以后的代码会少一些。虽然，这与您是否有 SubMenu.

实施

注意每个 MenuItem id 只是 menuItem+Position。当我们为每个 MenuItem.

找到 View 时，这会派上用场

<group android:checkableBehavior="single">
    <item
        android:id="@+id/menuItem1"
        android:icon="@drawable/ic_dashboard"
        android:title="MenuItem 1" />
    <item
        android:id="@+id/menuItem2"
        android:icon="@drawable/ic_event"
        android:title="MenuItem 2" />
    <item
        android:id="@+id/menuItem3"
        android:icon="@drawable/ic_headset"
        android:title="MenuItem 3" />
    <item
        android:id="@+id/menuItem4"
        android:icon="@drawable/ic_forum"
        android:title="MenuItem 4" />
</group>

<item android:title="Sub items" >
    <menu>
        <item
            android:id="@+id/menuItem5"
            android:icon="@drawable/ic_dashboard"
            android:title="Sub item 5" />
        <item
            android:id="@+id/menuItem6"
            android:icon="@drawable/ic_forum"
            android:title="Sub item 6" />
    </menu>
</item>

/** The total number of menu items in the {@link NavigationView} */
private static final int MENU_ITEMS = 6;
/** Contains the {@link MenuItem} views in the {@link NavigationView} */
private final ArrayList<View> mMenuItems = new ArrayList<>(MENU_ITEMS);

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    ...
    final NavigationView navView = ...
    // Grab the NavigationView Menu
    final Menu navMenu = navView.getMenu();
    // Install an OnGlobalLayoutListener and wait for the NavigationMenu to fully initialize
    navView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
        @Override
        public void onGlobalLayout() {
            // Remember to remove the installed OnGlobalLayoutListener
            navView.getViewTreeObserver().removeOnGlobalLayoutListener(this);
            // Loop through and find each MenuItem View
            for (int i = 0, length = MENU_ITEMS; i < length; i++) {
                final String id = "menuItem" + (i + 1);
                final MenuItem item = navMenu.findItem(getResources().getIdentifier(id, "id", getPackageName()));
                navView.findViewsWithText(mMenuItems, item.getTitle(), View.FIND_VIEWS_WITH_TEXT);
            }
            // Loop through each MenuItem View and apply your custom Typeface
            for (final View menuItem : mMenuItems) {
                ((TextView) menuItem).setTypeface(yourTypeface, Typeface.BOLD);
            }
        }
    });
}

您可以看到如何使用通用 MenuItem id 允许您利用 Resources.getIdentifier 并节省几行代码。

SubMenu 警告

要记住的事情。您需要明确地遍历 N 菜单项而不是使用 Menu.size。否则，您的 SubMenu 项将无法识别。换句话说，如果您没有 SubMenu，另一种方法是：

for (int i = 0, length = navMenu.size(); i < length; i++) {
    final MenuItem item = navMenu.getItem(i);
    navigationView.findViewsWithText(mMenuItems, item.getTitle(), View.FIND_VIEWS_WITH_TEXT);
}

而且您不必担心为每个 MenuItem.

应用唯一的 ID

结果

我在示例中使用的字体是：Smoothie Shoppe

Answer 2

只需将以下 class 文件添加到您的项目中。

import android.graphics.Paint;
import android.graphics.Typeface;
import android.text.TextPaint;
import android.text.style.TypefaceSpan;

public class CustomTypefaceSpan extends TypefaceSpan {

    private final Typeface newType;

    public CustomTypefaceSpan(String family, Typeface type) {
        super(family);
        newType = type;
    }

    @Override
    public void updateDrawState(TextPaint ds) {
        applyCustomTypeFace(ds, newType);
    }

    @Override
    public void updateMeasureState(TextPaint paint) {
        applyCustomTypeFace(paint, newType);
    }

    private static void applyCustomTypeFace(Paint paint, Typeface tf) {
        int oldStyle;
        Typeface old = paint.getTypeface();
        if (old == null) {
            oldStyle = 0;
        } else {
            oldStyle = old.getStyle();
        }

        int fake = oldStyle & ~tf.getStyle();
        if ((fake & Typeface.BOLD) != 0) {
            paint.setFakeBoldText(true);
        }

        if ((fake & Typeface.ITALIC) != 0) {
            paint.setTextSkewX(-0.25f);
        }

        paint.setTypeface(tf);
    }
}

然后为您的 activity 创建以下方法

private void applyFontToMenuItem(MenuItem mi) {
        Typeface font = Typeface.createFromAsset(getAssets(), "ds_digi_b.TTF");
        SpannableString mNewTitle = new SpannableString(mi.getTitle());
        mNewTitle.setSpan(new CustomTypefaceSpan("" , font), 0 , mNewTitle.length(),  Spannable.SPAN_INCLUSIVE_INCLUSIVE);
        mi.setTitle(mNewTitle);
}

并从 activity.

调用它

navView = (NavigationView) findViewById(R.id.navView);
        Menu m = navView.getMenu();
        for (int i=0;i<m.size();i++) {
            MenuItem mi = m.getItem(i);

            //for aapplying a font to subMenu ...
            SubMenu subMenu = mi.getSubMenu();
            if (subMenu!=null && subMenu.size() >0 ) {
                for (int j=0; j <subMenu.size();j++) {
                    MenuItem subMenuItem = subMenu.getItem(j);
                    applyFontToMenuItem(subMenuItem);
                }
            }

            //the method we have create in activity
            applyFontToMenuItem(mi);
        }

这是我的输出

Answer 3

不是自定义字体，而是另一种更改导航项字体的方法。创建一个名为 design_navigation_item.xml.

的布局

<android.support.design.internal.NavigationMenuItemView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="?attr/listPreferredItemHeightSmall"
    android:paddingLeft="?attr/listPreferredItemPaddingLeft"
    android:paddingRight="?attr/listPreferredItemPaddingRight"
    android:drawablePadding="@dimen/navigation_icon_padding"
    android:gravity="center_vertical|start"
    android:maxLines="1"
    android:fontFamily="sans-serif-thin"
    android:textSize="22sp"
    android:textAppearance="?attr/textAppearanceListItem" />

然后将 fontFamily 更改为所需的字体。

Answer 4

对于那些使用@Moinkhan 答案的人，要将字体应用到菜单的每一部分，请使用该解决方案，对于每个 header 部分，请使用 id。你的菜单是这样的..

<item android:title="@string/others" android:id="@+id/nav_others">
    <menu>
        <item
            android:id="@+id/contact"
            android:title="@string/contact"/>
    </menu>
</item>

和这样的解决方案..

navMenu = navView.getMenu();
    MenuItem item= navView.getMenu().findItem(R.id.nav_others);
    applyFontToMenuItem(item);

也许对某人有帮助。

Answer 5

这个对我有用

<android.support.design.widget.NavigationView
       android:id="@+id/navigation_view"
       android:layout_width="wrap_content"
       android:layout_height="match_parent"
       android:layout_gravity="start"
       android:background="#4A4444"
       android:clipToPadding="false"
       android:paddingBottom="50dp"
       app:itemIconTint="@color/white"
       app:menu="@menu/drawer_home"
       app1:itemTextAppearance="@style/NavigationDrawerStyle" >
</android.support.design.widget.NavigationView>

res->值->样式

 <style name="NavigationDrawerStyle">
    <item name="android:textSize">18sp</item>
    <item name="android:typeface">monospace</item>
</style>

//设置自定义字体MainApplication.java

public class MainApplication extends Application {
    @Override
    public void onCreate() {
        super.onCreate();

//set Custom Typeface

        FontsOverride.setDefaultFont(this, "MONOSPACE", "OpenSans-Semibold.ttf");
    }
}

// FontsOverride.java

public final class FontsOverride {

     public static void setDefaultFont(Context context,
                String staticTypefaceFieldName, String fontAssetName) {
            final Typeface regular = Typeface.createFromAsset(context.getAssets(),
                    fontAssetName);
            replaceFont(staticTypefaceFieldName, regular);
        }

        protected static void replaceFont(String staticTypefaceFieldName,
                final Typeface newTypeface) {
            try {
                final Field staticField = Typeface.class
                        .getDeclaredField(staticTypefaceFieldName);
                staticField.setAccessible(true);

                staticField.set(null, newTypeface);
            } catch (NoSuchFieldException e) {
                e.printStackTrace();
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            }
        }


}

Answer 6

回答有点晚了，但我找到了一种更简洁的方法，所以我想分享一下。

制作自定义视图NavFontTextView.java：

import android.content.Context;
import android.support.design.internal.NavigationMenuItemView;
import android.util.AttributeSet;

import utils.CustomFontHelper;

public class NavFontTextView extends NavigationMenuItemView {
Context mContext;

public NavFontTextView(Context context) {
    super(context);
    mContext = context;
    setDefaultFont();
}

public NavFontTextView(Context context, AttributeSet attrs) {
    super(context, attrs);
    mContext = context;
    setDefaultFont();
    CustomFontHelper.setCustomFont(this, context, attrs);
}

public NavFontTextView(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    mContext = context;
    setDefaultFont();
    CustomFontHelper.setCustomFont(this, context, attrs);
}

public void setDefaultFont() {
    CustomFontHelper.setCustomFont(this, "fonts/SourceSansPro-Regular.ttf", mContext);
}
}

创建一个名为 CustomFontHelper.java:

的文件

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Typeface;
import android.util.AttributeSet;
import android.widget.TextView;

/**
 * Taken from: 
 */
public class CustomFontHelper {
/**
 * Sets a font on a textview based on the custom com.my.package:font attribute
 * If the custom font attribute isn't found in the attributes nothing happens
 * @param textview
 * @param context
 * @param attrs
 */
public static void setCustomFont(TextView textview, Context context, AttributeSet attrs) {
    TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.CustomFont);
    String font = a.getString(R.styleable.CustomFont_font);
    setCustomFont(textview, font, context);
    a.recycle();
}

/**
 * Sets a font on a textview
 * @param textview
 * @param font
 * @param context
 */
public static void setCustomFont(TextView textview, String font, Context context) {
    if(font == null) {
        return;
    }
    Typeface tf = FontCache.get(font, context);
    if(tf != null) {
        textview.setTypeface(tf);
    }
}
}

进行布局layout/design_navigation_item.xml（名称必须完全一致）：

<?xml version="1.0" encoding="utf-8"?>
<custom_view.NavFontTextView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="?attr/listPreferredItemHeightSmall"
android:drawablePadding="10dp"
android:gravity="center_vertical|start"
android:maxLines="1"
android:paddingLeft="?attr/listPreferredItemPaddingLeft"
android:paddingRight="?attr/listPreferredItemPaddingRight"
app:font="fonts/SourceSansPro-Bold.ttf" />

将字体文件 SourceSansPro-Bold.ttf 放在这个路径中：app/src/main/assets/fonts/SourceSansPro-Bold.ttf

一切顺利！这样，您可以让您的主要 activity 更干净。

截图如下：

Answer 7

我真的很喜欢 "Dragon who spits fire" 的解决方案，但我没有得到 textview。这可以通过执行以下操作来完成：

TextView textView = (CheckedTextView) findViewById(android.support.design.R.id.design_menu_item_text);

public class StyledMenuItem extends NavigationMenuItemView {
public StyledMenuItem(Context context) {
    super(context);
}

public StyledMenuItem(Context context, AttributeSet attrs) {
    super(context, attrs);
    if (!isInEditMode()) {
        setCustomFont(context, attrs);
        setFilterTouchesWhenObscured(true);
    }
}

public StyledMenuItem(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    if (!isInEditMode()) {
        setCustomFont(context, attrs);
        setFilterTouchesWhenObscured(true);
    }
}

private void setCustomFont(Context ctx, AttributeSet attrs) {
    TypedArray a = ctx.obtainStyledAttributes(attrs, R.styleable.ProjectView);
    String customFont = a.getString(R.styleable.ProjectView_projectFont);
    setCustomFont(ctx, customFont);
    a.recycle();
}

private void setCustomFont(Context ctx, String asset) {
    Typeface typeFace = TypeFaceProvider.getTypeFace(ctx, asset);
    TextView textView = (CheckedTextView) findViewById(android.support.design.R.id.design_menu_item_text);
    if (typeFace != null && textView != null) {
        textView.setTypeface(typeFace);
    }
}

design_navigation_item.xml:

<?xml version="1.0" encoding="utf-8"?>

style.xml:

<style name="Body1" parent="Base.TextAppearance.AppCompat.Body1">
    <item name="projectFont">Quicksand-Regular.otf</item>
</style>

attrs.xml:

<?xml version="1.0" encoding="utf-8"?>
<resources>

<declare-styleable name="ProjectView">
    <attr name="projectFont" format="string" />
</declare-styleable>
</resources>

Answer 8

applyFontToMenuItem(popup.getMenu().getItem(0));
private void applyFontToMenuItem(MenuItem mi) {
    Typeface font = Typeface.createFromAsset(getAssets(), "fonts/Redressed.ttf");       
    SpannableString mNewTitle = new SpannableString(mi.getTitle());
    mNewTitle.setSpan(new CustomTypefaceSpan("", font), 0, mNewTitle.length(),pannable.SPAN_INCLUSIVE_INCLUSIVE);
    mi.setTitle(mNewTitle);
}

Answer 9

我重构了 @adneal 的 对此的回答。它根据索引而不是 id 遍历菜单项（不进入子项，只有顶级项）并设置字体。

将 rightNavigationView 替换为您的 NavigationView 和 {TYPEFACE} 用你想要的字体

final Menu navMenu = rightNavigationView.getMenu();
        rightNavigationView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            @Override
            public void onGlobalLayout() {
                ArrayList<View> menuItems = new ArrayList<>(); // save Views in this array
                rightNavigationView.getViewTreeObserver().removeOnGlobalLayoutListener(this); // remove the global layout listener
                for (int i = 0; i < navMenu.size(); i++) {// loops over menu items  to get the text view from each menu item
                    final MenuItem item = navMenu.getItem(i);
                    rightNavigationView.findViewsWithText(menuItems, item.getTitle(), View.FIND_VIEWS_WITH_TEXT);
                }
                for (final View menuItem : menuItems) {// loops over the saved views and sets the font
                    ((TextView) menuItem).setTypeface({TYPE}, Typeface.BOLD);
                }
            }
        });

Answer 10

使用 app:itemTextAppearance="" 属性。希望这有帮助。

 <android.support.design.widget.NavigationView
        android:id="@+id/nav_view"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:fitsSystemWindows="true"
        app:headerLayout="@layout/nav_header_main"
        android:background="@drawable/nav_bg_gradient"
        android:theme="@style/NavigationView"
        app:itemIconTint="@color/colorWhite"
        app:itemTextColor="@color/colorWhite"
        app:itemTextAppearance="@style/NavigationText"
        app:menu="@menu/main_drawer">

在styles.xml中写入

<style name="NavigationText" parent="@android:style/TextAppearance.Medium">
        <item name="android:textColor">@color/colorWhite</item>
        <item name="android:textSize">12sp</item>
        <item name="android:fontFamily">sans-serif-thin</item>
    </style>

Answer 11

这是另一种方法：

一个NavigationView has children called NavigationMenuItemView. A NavigationMenuItemView has two children. One is AppCompatCheckedTextView.

像下面那样重写 NavigationView 的 onLayout 方法并更改 AppCompatCheckedTextView 的 Typefase:

public final class NavigationViewWithCustomFont extends NavigationView{
    private final Context context;
    private Typeface fontFace;

    public NavigationViewWithCustomFont(Context context, AttributeSet attrs){
        super(context, attrs);
        this.context = context;
        this.fontFace = null;
    }

    @Override
    protected void onLayout(boolean changed, int left, int top, int right, int bottom){
        super.onLayout(changed, left, top, right, bottom);
        final ViewGroup navMenuView = (ViewGroup)getChildAt(0);
        final int navMenuItemsCount = navMenuView.getChildCount();
        ViewGroup itemView;

        if(fontFace == null){
            fontFace = Typeface.createFromAsset(context.getAssets(), context.getString(R.string.BTrafficBold));
        }
        for(int i=0; i<navMenuItemsCount; i++){
            itemView = (ViewGroup)navMenuView.getChildAt(i);

            if(itemView instanceof NavigationMenuItemView ){
                CheckedTextView checkedTextView = (CheckedTextView)itemView.getChildAt(0);
                checkedTextView.setTypeface(fontFace, Typeface.BOLD);
            }
        }
    }
}

Answer 12

我用过app:theme

<android.support.design.widget.NavigationView
    android:id="@+id/nav_view"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_gravity="start"
    android:background="@color/colorMenuBackground"
    android:fitsSystemWindows="true"
    app:headerLayout="@layout/nav_header_main"
    app:menu="@menu/activity_main_drawer"
    app:theme="@style/NavigationViewTextAppearance"
   />

styles.xml :

<style name="NavigationViewTextAppearance">
    <item name="android:ellipsize">end</item>
    <item name="android:fontFamily">@font/badscript_regular</item>
</style>

Answer 13

另一种设置自定义字体的方法：

1. 您可以将字体添加到 "font" 文件夹中，然后您可以在任何 TextView（或任何需要的地方）中使用它们

font.xml的例子：

<?xml version="1.0" encoding="utf-8"?>
<font-family xmlns:android="http://schemas.android.com/apk/res/android">
    <font
        android:font="@font/nunito_bold"
        android:fontStyle="normal"
        android:fontWeight="400" />
</font-family>

2. 在您的 styles.xml 文件中，您可以根据需要使用该字体和颜色自定义项目文本样式（来自@Moonis Abidi 的回答）

 <style name="NavigationText" parent="@android:style/TextAppearance.Medium">
        <item name="android:textColor">@android:color/white</item>
        <item name="android:textSize">12sp</item>
        <item name="android:fontFamily">@font/nunito_semibold</item>
    </style>

3. 现在，您只需在导航视图中使用 app:itemTextAppearance:

指定此项

<android.support.design.widget.NavigationView
        android:id="@+id/nav_view"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:fitsSystemWindows="true"
        app:headerLayout="@layout/nav_header"
        app:menu="@menu/main_menu"
        app:itemTextAppearance="@style/NavigationText"/>

// -------------- 另外，如果你需要从其他TextViews中使用这个字体，你可以像

一样使用它

 <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:fontFamily="@font/nunito_bold"/>

Answer 14

BottomNavigationView bottom_nav = findViewById(R.id.bottom_nav);
Typeface font = Typeface.createFromAsset(getAssets(), "--your customized font file--");
for (int i = 0; i <bottom_nav.getMenu().size(); i++) {
        MenuItem menuItem = bottom_nav.getMenu().getItem(i);
        SpannableStringBuilder spannableTitle = new SpannableStringBuilder(menuItem.getTitle());
        spannableTitle.setSpan(font.getStyle(), 0, spannableTitle.length(), Spannable.SPAN_INCLUSIVE_INCLUSIVE);
        menuItem.setTitle(spannableTitle);
    }

Answer 15

添加res/font/文件夹中的字体文件，将字体打包为资源，然后可以使用样式资源进行更改。在你的 styles.xml :

<style name="Widget.BottomNavigationView" 
   parent="Widget.Design.BottomNavigationView">
   <item name="fontFamily">@font/your_font</item>
</style>

然后在您的视图中将其应用为主题：

<android.support.design.widget.BottomNavigationView
   ...
   android:theme="@style/Widget.BottomNavigationView"
/>

如何为 NavigationView 中的项目设置自定义字体？

How to set custom typeface to items in NavigationView?

android

android-design-library

navigationview