android - 为 TextView 的一部分设置不同的字体和颜色

Question

我试过这个:

String s = "Some big string"
SpannableStringBuilder sb = new SpannableStringBuilder(s);
//normal font for 1st 9 chars
sb.setSpan(robotoRegular, 0,9,Spannable.SPAN_INCLUSIVE_INCLUSIVE);
//bold font for rest of the chars
sb.setSpan(robotoBold, 9,s.length(),Spannable.SPAN_INCLUSIVE_INCLUSIVE);
//also change color for rest of the chars
sb.setSpan(new ForegroundColorSpan(Color.BLACK), 9,s.length(),Spannable.SPAN_INCLUSIVE_INCLUSIVE);
textView.setText(sb);

但这没有用。

它只需要最新的 setSpan，即..，正在更改文本颜色但不更改字体。

Answer 1

您必须使用 TypefaceSpan 而不是 Typeface。

但由于您使用的是自定义字体，因此您需要扩展 TypefaceSpan。

看看这个 answer并创建 CustomTypefaceSpan 类。

现在执行以下操作:

Typeface robotoRegular = Typeface.createFromAsset(getAssets(), "fonts/Roboto-Regular.ttf");
Typeface robotoBold = Typeface.createFromAsset(getAssets(), "fonts/Roboto-Bold.ttf");

TypefaceSpan robotoRegularSpan = new CustomTypefaceSpan("", robotoRegular);
TypefaceSpan robotoBoldSpan = new CustomTypefaceSpan("", robotoBold);

// normal font for 1st 9 chars
sb.setSpan(robotoRegularSpan, 0, 9, Spannable.SPAN_INCLUSIVE_INCLUSIVE);
// bold font for rest of the chars
sb.setSpan(robotoBoldSpan, 9, s.length(), Spannable.SPAN_INCLUSIVE_INCLUSIVE);
// also change color for rest of the chars
sb.setSpan(new ForegroundColorSpan(Color.BLUE), 9, s.length(), Spannable.SPAN_INCLUSIVE_INCLUSIVE);
textView.setText(sb);