如何在Android中利用TextView对字体颜色进行更改

package com.chuck.recyclerviewdemo;import android.content.Context;import android.graphics.Canvas;import android.text.SpannableStringBuilder;import android.text.Spanned;import android.text.style.ForegroundColorSpan;import android.util.AttributeSet;import android.widget.TextView;import java.util.List;public class DifferentColorTextView extends TextView{ public DifferentColorTextView(Context context) {  super(context); } public DifferentColorTextView(Context context, AttributeSet attrs) {  super(context, attrs); } public DifferentColorTextView(Context context, AttributeSet attrs, int defStyleAttr) {  super(context, attrs, defStyleAttr); } @Override protected void onDraw(Canvas canvas) {  super.onDraw(canvas); } public void setDifferentColorText(List<String> text,List<Integer>colors){  setText(calculateResidue(text,colors)); }  private SpannableStringBuilder calculateResidue(List<String> text, List<Integer>colors) {  if(text==null||colors==null){   return null;  }  StringBuilder sb =new StringBuilder();  for (int i=0;i<text.size();i++){   sb.append(text.get(i));  }  SpannableStringBuilder ssb=new SpannableStringBuilder(sb.toString());  int begin=0;  for (int i=0;i<text.size();i++){   ForegroundColorSpan mSpan = new ForegroundColorSpan(colors.get(i));   ssb.setSpan(mSpan,begin,begin+text.get(i).length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);   begin=begin+text.get(i).length();  }  return ssb; }}