如何设置在Android的一个按钮上的文字一个特定的字体？ [英] How to set a particular font for a button text in android?

问题描述

我希望我的按钮上的文字是在铜板哥特灯的字体，我还没有碰到过一个简单干净的$ C $下一个简单的功能，因为这。帮帮我！

I want my button text to be in the Copperplate Gothic Light font and I yet have not come across a simple clean code for a simple function as this. Help!

PS：由于Android自带的阿里尔和其自身的一些其他字体我们需要导入（道歉因为即时通讯新的这个缺乏一个更好的词），我们希望使用的字体。这是我已经能够收集到然而，这就是线索，我结束。

PS: Since android comes with ariel and a few other fonts on its own we need to import (apologies for the lack of a better word since im new to this) the font we wish to use. This is all I have been able to gather till yet and this is where the trail ends for me.

帮助需要！ ：]

推荐答案

如果您计划在同一字体添加到几个按钮，我建议你一路走下去，并实现它作为一种风格和子键：

If you plan to add the same font to several buttons I suggest that you go all the way and implement it as a style and subclass button:

public class ButtonPlus extends Button {

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

    public ButtonPlus(Context context, AttributeSet attrs) {
        super(context, attrs);
        CustomFontHelper.setCustomFont(this, context, attrs);
    }

    public ButtonPlus(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        CustomFontHelper.setCustomFont(this, context, attrs);
    }
}

这是一个辅助类在一个TextView设置字体（记住，按钮TextView中的一个子类）的基础上com.my.package：字体属性：

This is a helper class to set a font on a TextView (remember, Button is a subclass of TextView) based on the com.my.package:font attribute:

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);
        }
    }

}

和这里的FontCache来减少对旧设备的内存使用情况的：

And here's the FontCache to reduce memory usage on older devices:

public class FontCache {

    private static Hashtable<String, Typeface> fontCache = new Hashtable<String, Typeface>();

    public static Typeface get(String name, Context context) {
        Typeface tf = fontCache.get(name);
        if(tf == null) {
            try {
                tf = Typeface.createFromAsset(context.getAssets(), name);
            }
            catch (Exception e) {
                return null;
            }
            fontCache.put(name, tf);
        }
        return tf;
    }
}

在RES /价值/ attrs.xml我们定义自定义设置样式属性。

In res/values/attrs.xml we define the custom styleable attribute

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <declare-styleable name="CustomFont">
        <attr name="font" format="string"/>
    </declare-styleable>
</resources>

最后，在布局实例使用：

And finally an example use in a layout:

    <com.my.package.buttons.ButtonPlus
        style="@style/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/button_sometext"/>

而在RES /价值/ style.xml

And in res/values/style.xml

<style name="button" parent="@android:style/Widget.Button">
    <item name="com.my.package:font">fonts/copperplate_gothic_light.TTF</item>
</style>

这似乎是一个可怕的大量的工作，但你会感谢我，一旦你有几个要更改字体，按钮和文本框一把的。

This may seem like an awful lot of work, but you'll thank me once you have couple of handfuls of buttons and textfields that you want to change font on.

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