TypefaceCompat.java 文件源码

/**
 * Return Typeface.sSystemFontMap.
 *
 * @return Typeface.sSystemFontMap
 */
@SuppressWarnings("unchecked")
@Nullable
public static Map<String, Typeface> getSystemFontMap() {
    if (!available) {
        return null;
    }

    if (sSystemFontMap == null) {
        try {
            sSystemFontMap = (Map<String, Typeface>) sSystemFontMapField.get(null);
        } catch (IllegalAccessException e) {
            e.printStackTrace();
            return null;
        }
    }

    return sSystemFontMap;
}