android更改语言区域设置时字体不变

// 获取当前语言设置
String language = Locale.getDefault().getLanguage();

// 根据语言设置加载对应的字体资源
Typeface typeface;
if (language.equals("en")) {
    typeface = Typeface.createFromAsset(getAssets(), "font-en/your_font.ttf");
} else if (language.equals("zh")) {
    typeface = Typeface.createFromAsset(getAssets(), "font-zh/your_font.ttf");
} else {
    typeface = Typeface.DEFAULT;
}

// 应用字体到需要改变的视图上
TextView textView = findViewById(R.id.textView);
textView.setTypeface(typeface);