如何使用自定义字体设置Spannable对象字体

public SpannableStringBuilder applyCustomFontToSpannable(String text, String fontName) {
    SpannableStringBuilder spannable = new SpannableStringBuilder(text);
    Typeface customFontTypeface = Typeface.createFromAsset(getAssets(), "fonts/" + fontName);

    // 应用自定义字体到Spannable对象
    StyleSpan styleSpan = new StyleSpan(customFontTypeface);
    spannable.setSpan(styleSpan, 0, spannable.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

    return spannable;
}

String text = "Hello, World!";
String fontName = "my_custom_font.ttf";
SpannableStringBuilder customFontSpannable = applyCustomFontToSpannable(text, fontName);

// 将Spannable对象设置为TextView的文本
TextView textView = findViewById(R.id.textView);
textView.setText(customFontSpannable);