SpannableStringBuilder to create String with multiple fonts/text sizes etc Example?

Question

I need to create a String placed in a TextView that will display a string like this:

First Part Not Bold BOLD rest not bold

Answer 1

From API 21 SpannableStringBuilder includes a simple method to do this. Here is a solution example:

SpannableStringBuilder builder= new SpannableStringBuilder();
StyleSpan boldSpan = new StyleSpan(android.graphics.Typeface.BOLD);
builder.append("First Part Not Bold ")
              .append("BOLD ", boldSpan, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
              .append("rest not bold");

Since it is a good chance you do not support API 21 only you can duplicate the code from that method:

public SpannableStringBuilder append(CharSequence text, Object what, int flags) {
        int start = length();
        append(text);
        setSpan(what, start, length(), flags);
        return this;
}