Android 上的自定义字体和自定义文本视图 [英] Custom Fonts and Custom Textview on Android

问题描述

从我需要开发的应用程序中，我收到了包含许多文件的特定字体，例如 FontName-Regular、FontName-Bold、FontName-it.我需要在应用程序的所有文本视图中使用它.首先，我认为这是一项简单的任务.查看 SO，发现一个非常好的线程:这里

From an application I need to develop, I've received a specific font that has many files like FontName-Regular, FontName-Bold, FontName-it. I need to use it in all the textviews in the application. First I thought it was an easy task. Look over SO and found a very nice thread:here

所以首先我确实喜欢:

public static void overrideFonts(final Context context, final View v) {
    try {
        if (v instanceof ViewGroup) {
            ViewGroup vg = (ViewGroup) v;
            for (int i = 0; i < vg.getChildCount(); i++) {
                View child = vg.getChildAt(i);
                overrideFonts(context, child);
            }
        } else if (v instanceof TextView) {
            ((TextView)v).setTypeface(FONT_REGULAR);
        }
    } catch (Exception e) {
        e.printStackTrace();
        // ignore
    }
}

并在我的活动中的 onCreate 期间调用了此方法.我的应用程序中的每个 textView 都显示了那个字体和男孩，我很高兴能如此轻松地离开.直到我进入一个屏幕，其中一些文本视图需要 Bold 作为 Style (android:textStyle="bold").然后我意识到这个解决方案不能让我从资产中加载 Font-Bold.ttf.

And called this method during onCreate in my activity. Every textView in my app was showing that font and boy, was I happy for getting away so easy. Until I got to a screen where some textviews required Bold as Style (android:textStyle="bold"). Then I realized that this solution does not provide me with possibility to load the Font-Bold.ttf from assets.

在同一个 SO 问题中，进一步查看并看到了一个不错的自定义 TextView 实现:

Than looked further and saw a nice custom TextView implementation, in the same SO question:

public class MyTextView extends TextView {

    public MyTextView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init();
    }

    public MyTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public MyTextView(Context context) {
        super(context);
        init();
    }

    public void init() {

        Typeface tf = Typeface.createFromAsset(getContext().getAssets(), "font/chiller.ttf");
        setTypeface(tf ,1);

    }
    }

这看起来更好.我的问题是:如何在 init() 上检测我的控件是否将 Style 设置为 Bold 以便我可以分配请求的 TypeFace ?

This looks even better. My question is: how can I detect on init() if my control has Style set to Bold or not so I can assign the requested TypeFace ?

感谢您的宝贵时间.

乐.按照下面的示例，我将我的课程更新为:

LE. Following the example below, I've updated my class as:

public class MyTextView extends TextView {

    Typeface normalTypeface = Typeface.createFromAsset(getContext().getAssets(), Constants.FONT_REGULAR);
    Typeface boldTypeface = Typeface.createFromAsset(getContext().getAssets(),  Constants.FONT_BOLD);

    public MyTextView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    public MyTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public MyTextView(Context context) {
        super(context);
    }

    public void setTypeface(Typeface tf, int style) {
        if (style == Typeface.BOLD) {
            super.setTypeface(boldTypeface/*, -1*/);
        } else {
            super.setTypeface(normalTypeface/*, -1*/);
        }
    }
}

好吧，如果我调试，应用程序进入 setTypeFace 并且它似乎应用了粗体，但在我的布局上我看不到任何变化，而不是粗体.无论我使用什么字体，我的 TextView 都不会进行任何更改，并使用默认的 android 字体显示.我想知道为什么?

Well If I debug, the app goes in setTypeFace and it seems to apply the bold one, but on my layout I can't see any change, not bold. No matter what font I use, no changes are done in my TextView and is displayed with the default android font. I wonder why ?

我在一篇博文中总结了所有内容 在我的博客上 也许它会对某人有所帮助.

I have summed everything on a blog post here on my blog maybe it will help someone.

推荐答案

TextView的构造函数调用setTypeface(Typeface tf, int style)，style从 XML 属性 android:textStyle 检索的 参数.因此，如果您想拦截此调用以强制使用您自己的字体，您可以重写此方法，如下所示:

The constructor of TextView calls setTypeface(Typeface tf, int style) with the style parameter retrieved from the XML attribute android:textStyle. So, if you want to intercept this call to force your own typeface you can override this method as follow:

public void setTypeface(Typeface tf, int style) {
    Typeface normalTypeface = Typeface.createFromAsset(getContext().getAssets(), "font/your_normal_font.ttf");
    Typeface boldTypeface = Typeface.createFromAsset(getContext().getAssets(), "font/your_bold_font.ttf");

    if (style == Typeface.BOLD) {
        super.setTypeface(boldTypeface/*, -1*/);
    } else {
        super.setTypeface(normalTypeface/*, -1*/);
    }
}

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