你可以这样尝试:

<string name="title"><u><b><i>Your Text</i></b></u></string>

基于样式选择标准，最简单的方法是:

String pre = "", post = "";

if(isBold){
    pre += "<b>"; post += "</b>";
}
if(isItalic){
    pre += "<i>"; post += "</i>";
}
if(isUnderline){
    pre += "<u>"; post += "</u>";
}

textView.setText(Html.fromHtml(pre + editText.getText().toString()+ post));
// you can also use it with EidtText
editText.setText(Html.fromHtml(pre + editText.getText().toString()+ post));

编程:

你可以通过编程方式使用setTypeface()方法:

下面是默认字体的代码

textView.setTypeface(null, Typeface.NORMAL);      // for Normal Text
textView.setTypeface(null, Typeface.BOLD);        // for Bold only
textView.setTypeface(null, Typeface.ITALIC);      // for Italic
textView.setTypeface(null, Typeface.BOLD_ITALIC); // for Bold and Italic

如果你想设置自定义字体:

textView.setTypeface(textView.getTypeface(), Typeface.NORMAL);      // for Normal Text
textView.setTypeface(textView.getTypeface(), Typeface.BOLD);        // for Bold only
textView.setTypeface(textView.getTypeface(), Typeface.ITALIC);      // for Italic
textView.setTypeface(textView.getTypeface(), Typeface.BOLD_ITALIC); // for Bold and Italic

XML:

你可以直接在<TextView />的XML文件中设置如下:

android:textStyle="normal"
android:textStyle="normal|bold"
android:textStyle="normal|italic"
android:textStyle="bold"
android:textStyle="bold|italic"

或者你可以设置你最喜欢的字体(从资产)。欲了解更多信息，请参阅链接

textView.setTypeface(null, Typeface.BOLD_ITALIC);
textView.setTypeface(null, Typeface.BOLD);
textView.setTypeface(null, Typeface.ITALIC);
textView.setTypeface(null, Typeface.NORMAL);

保持以前的字体

textView.setTypeface(textView.getTypeface(), Typeface.BOLD_ITALIC)

//leveraging the extension functions
fun TextView.makeBold(){
    this.setTypeface(this.typeface,Typeface.BOLD)
}


yourTextView.makeBold()

在我的例子中:

1 -设置文本

2 -设置字体

holder.title.setText(item.nome);
holder.title.setTypeface(null, Typeface.BOLD);