Textview ForegroundColorSpan 为文字前景色，BackgroundColorSpan为文字背景色

1 textView = (TextView) findViewById(R.id.textview);
 2 SpannableStringBuilder builder = new SpannableStringBuilder(textView.getText().toString());
 3 
 4 //ForegroundColorSpan 为文字前景色，BackgroundColorSpan为文字背景色
 5 ForegroundColorSpan redSpan = new ForegroundColorSpan(Color.RED);
 6 ForegroundColorSpan whiteSpan = new ForegroundColorSpan(Color.WHITE);
 7 ForegroundColorSpan blueSpan = new ForegroundColorSpan(Color.BLUE);
 8 ForegroundColorSpan greenSpan = new ForegroundColorSpan(Color.GREEN);
 9 ForegroundColorSpan yellowSpan = new ForegroundColorSpan(Color.YELLOW);
 10 
 11 
 12 
 13 builder.setSpan(redSpan, 0, 1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 14 builder.setSpan(whiteSpan, 1, 2, Spannable.SPAN_INCLUSIVE_INCLUSIVE);
 15 builder.setSpan(blueSpan, 2, 3, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 16 builder.setSpan(greenSpan, 3, 4, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 17 builder.setSpan(yellowSpan, 4,5, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 18 
 19 textView.setText(builder);/**
 * 设置SpannableString 样式
 *设置相应位置文字颜色及样式
 * @param s 传入的string
 * @param start 开始位置
 * @param end 结束位置
 * @return SpannableString
 */
 fun getSpannableString(s: String, start: Int, end: Int): SpannableString {
 val spannableString = SpannableString(s)
 val colorSpan_a = ForegroundColorSpan(Color.parseColor("#333333"))
 val colorSpan_b = ForegroundColorSpan(Color.parseColor("#151515"))
 val styleSpan = StyleSpan(Typeface.BOLD)
 spannableString.setSpan(styleSpan, start, end, Spanned.SPAN_INCLUSIVE_EXCLUSIVE)//粗体
 spannableString.setSpan(colorSpan_a, start, end, Spanned.SPAN_INCLUSIVE_EXCLUSIVE)//黑色
 spannableString.setSpan(colorSpan_b, end, spannableString.length, Spanned.SPAN_INCLUSIVE_EXCLUSIVE)//描述色彩#151515
 return spannableString
 }