textview = (TextView) findViewById(R.id.textview);
SpannableStringBuilder ssbuilder = new SpannableStringBuilder(textview.getText().toString());
//ForegroundColorSpan--文字前景色，BackgroundColorSpan--文字背景色
ForegroundColorSpan yellowSpan = new ForegroundColorSpan(Color.YELLOW);
ssbuilder.setSpan(yellowSpan, 11,15, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
textview.setText(ssbuilder);
效果如下：
QQ截圖20160619212930.png
