你可以这样尝试:

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

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)

你可以这样做:

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

如果你想保留之前的字体，不想失去之前应用的字体，那么另一个选择:

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

1)你可以用字体设置。 2)你可以直接在strings.xml中使用(在你的values文件夹中) 3)你可以String myNewString = " This is my bold text This is my italics String This is my underscore 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));

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


yourTextView.makeBold()