使TextView的一半文本颜色与其他50%的文本颜色不同

SpannableString spannableString = new SpannableString(textView.getText().toString());

int halfLength = spannableString.length() / 2;

ForegroundColorSpan colorSpan1 = new ForegroundColorSpan(Color.RED);
ForegroundColorSpan colorSpan2 = new ForegroundColorSpan(Color.BLUE);

spannableString.setSpan(colorSpan1, 0, halfLength, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
spannableString.setSpan(colorSpan2, halfLength, spannableString.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

textView.setText(spannableString);