android-如何获取应用于textview的字体的名称

Textview label = (TextView) findViewById(R.id.item_title);
label.setText("Solve My Issue !");
Log.d("TAG","Font-Family : "+ String.valueOf(label.getTypeface()));

当我看到日志时,它返回Font-Family：android.graphics.Typeface@7f37f870

如何知道字体家族的名称？可能吗 ？

解决方法:

getTypeface()方法返回label的Typeface,而此Tyepface实例是Map< String,Typeface>的值. sSystemFontMap,它是Typeface的静态字段.因此,现在您获取了值,并通过反射可以获取地图sSystemFontMap,然后想要查找键,该键正是字体的名称.

protected Map<String, Typeface> getSSystemFontMap() {
    Map<String, Typeface> sSystemFontMap = null;
    try {
        //Typeface typeface = Typeface.class.newInstance();
        Typeface typeface = Typeface.create(Typeface.DEFAULT, Typeface.NORMAL);
        Field f = Typeface.class.getDeclaredField("sSystemFontMap");
        f.setAccessible(true);
        sSystemFontMap = (Map<String, Typeface>) f.get(typeface);
        for (Map.Entry<String, Typeface> entry : sSystemFontMap.entrySet()) {
            Log.d("FontMap", entry.getKey() + " ---> " + entry.getValue() + "\n");
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    return sSystemFontMap;
}

private static List<String> getKeyWithValue(Map map, Typeface value) {
    Set set = map.entrySet();
    List<String> arr = new ArrayList<>();
    for (Object obj : set) {
        Map.Entry entry = (Map.Entry) obj;
        if (entry.getValue().equals(value)) {
            String str = (String) entry.getKey();
            arr.add(str);
        }
    }
    return arr;
}

我测试了它,并且列表arr包含在字符串下面

sans-serif
tahoma
arial
helvetica
verdana

这并不奇怪,因为Android系统使用与上述五个名称相同的一种字体. (也许不同系统版本有一些差异,有关更多信息,请转到/system/etc/fonts.xml)

<family name="sans-serif">
    <font weight="100" style="normal">Roboto-Thin.ttf</font>
    <font weight="100" style="italic">Roboto-ThinItalic.ttf</font>
    <font weight="300" style="normal">Roboto-Light.ttf</font>
    <font weight="300" style="italic">Roboto-LightItalic.ttf</font>
    <font weight="400" style="normal">Roboto-Regular.ttf</font>
    <font weight="400" style="italic">Roboto-Italic.ttf</font>
    <font weight="500" style="normal">Roboto-Medium.ttf</font>
    <font weight="500" style="italic">Roboto-MediumItalic.ttf</font>
    <font weight="900" style="normal">Roboto-Black.ttf</font>
    <font weight="900" style="italic">Roboto-BlackItalic.ttf</font>
    <font weight="700" style="normal">Roboto-Bold.ttf</font>
    <font weight="700" style="italic">Roboto-BoldItalic.ttf</font>
</family>
<!-- Note that aliases must come after the fonts they reference. -->
<alias name="sans-serif-thin" to="sans-serif" weight="100" />
<alias name="sans-serif-light" to="sans-serif" weight="300" />
<alias name="sans-serif-medium" to="sans-serif" weight="500" />
<alias name="sans-serif-black" to="sans-serif" weight="900" />
<alias name="arial" to="sans-serif" />
<alias name="helvetica" to="sans-serif" />
<alias name="tahoma" to="sans-serif" />
<alias name="verdana" to="sans-serif" />

从中你可以看到. sans-serif,tahoma,arial,helvetica,verdana都是同一件事.字体家族sans-serif的不同名称

标签：android-fonts,android-layout,android
来源： https://codeday.me/bug/20191027/1940718.html