android 文字中的部分字的颜色

int mainTextLength = mainText.length();
int secureInfoLength = getShortMessage.getSecureInfo.length();
SpannableStringBuilder style = new SpannableStringBuilder(mainText+getShortMessage.getSecureInfo);

//底的颜色

style.setSpan(

new BackgroundColorSpan(Color.GREEN),mainTextLength,mainTextLength+secureInfoLength,

Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

//字的颜色

style.setSpan(

new ForegroundColorSpan(Color.RED),mainTextLength,mainTextLength+secureInfoLength,

Spannable.SPAN_EXCLUSIVE_INCLUSIVE);

text1.setTextColor(0XFF666666);//字默认颜色
text1.setText(style);