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;

/**
 * 项目名称：trunk
 * 类描述：
 * 创建人：Administrator
 * 创建时间：2015/12/10 14:05
 * 修改人：Administrator
 * 修改时间：2015/12/10 14:05
 * 修改备注：
 */
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));
 }
 /**显示不同颜色*/
 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;
 }
}