是否可以为整个应用程序设置自定义字体? [英] Is it possible to set a custom font for entire of application?

问题描述

我需要为我的整个应用程序使用某种字体.我有相同的 .ttf 文件.是否可以在应用程序启动时将其设置为默认字体，然后在应用程序的其他地方使用它?设置后，如何在我的布局 XML 中使用它?

I need to use certain font for my entire application. I have .ttf file for the same. Is it possible to set this as default font, at application start up and then use it elsewhere in the application? When set, how do I use it in my layout XMLs?

推荐答案

是的，有反射.这有效(基于此答案):

Yes with reflection. This works (based on this answer):

(注意:由于缺乏对自定义字体的支持，这是一种解决方法，所以如果你想改变这种情况，请为 android 问题在这里).注意:不要在这个问题上留下我也是"的评论，当你这样做时，所有关注它的人都会收到一封电子邮件.所以请给它加星标".

(Note: this is a workaround due to lack of support for custom fonts, so if you want to change this situation please do star to up-vote the android issue here). Note: Do not leave "me too" comments on that issue, everyone who has stared it gets an email when you do that. So just "star" it please.

import java.lang.reflect.Field;
import android.content.Context;
import android.graphics.Typeface;

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();
        }
    }
}

然后您需要重载少数默认字体，例如在应用程序 类:

You then need to overload the few default fonts, for example in an application class:

public final class Application extends android.app.Application {
    @Override
    public void onCreate() {
        super.onCreate();
        FontsOverride.setDefaultFont(this, "DEFAULT", "MyFontAsset.ttf");
        FontsOverride.setDefaultFont(this, "MONOSPACE", "MyFontAsset2.ttf");
        FontsOverride.setDefaultFont(this, "SERIF", "MyFontAsset3.ttf");
        FontsOverride.setDefaultFont(this, "SANS_SERIF", "MyFontAsset4.ttf");
    }
}

当然，如果您使用相同的字体文件，您可以改进它以仅加载一次.

Or course if you are using the same font file, you can improve on this to load it just once.

但是我倾向于只覆盖一个，比如 "MONOSPACE"，然后设置一个样式来强制该字体字体应用广泛:

However I tend to just override one, say "MONOSPACE", then set up a style to force that font typeface application wide:

<resources>
    <style name="AppBaseTheme" parent="android:Theme.Light">
    </style>

    <!-- Application theme. -->
    <style name="AppTheme" parent="AppBaseTheme">
        <item name="android:typeface">monospace</item>
    </style>
</resources>

API 21 安卓 5.0

我已经调查了评论中的报告，它不起作用并且它似乎与主题 android:Theme.Material.Light 不兼容.

如果该主题对您不重要，请使用较旧的主题，例如:

If that theme is not important to you, use an older theme, e.g.:

<style name="AppTheme" parent="android:Theme.Holo.Light.DarkActionBar">
    <item name="android:typeface">monospace</item>
</style>

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