android--设置TextView部分文字的颜色和背景(高亮显示)

设置部分文字背景高亮显示： 

 public class HighLightActivity extends Activity {
     String strs="我的心太乱了，给我点空白。";
     TextView textview;
     int start =3;
     int end = 5;
     /** Called when the activity is first created. */
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.high_light);
         textview=(TextView)findViewById(R.id.textview);
         SpannableStringBuilder style=new SpannableStringBuilder(strs);
         style.setSpan(new BackgroundColorSpan(Color.RED),start,end,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
         textview.setText(style);

     }

 }

显示效果： 

 

同时设置文字和背景高亮显示： 

 package com.justel.contact;

 import android.app.Activity;
 import android.graphics.Color;
 import android.os.Bundle;
 import android.text.Spannable;
 import android.text.SpannableStringBuilder;
 import android.text.style.BackgroundColorSpan;
 import android.text.style.ForegroundColorSpan;
 import android.widget.TextView;

 public class HighLightActivity extends Activity {
     String strs="我的心太乱了，给我点空白。";
     TextView textview;
     int start =3;
     int end = 5;
     /** Called when the activity is first created. */
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.high_light);
         textview=(TextView)findViewById(R.id.textview);
         SpannableStringBuilder style=new SpannableStringBuilder(strs);
         style.setSpan(new BackgroundColorSpan(Color.RED),start,end,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
         style.setSpan(new ForegroundColorSpan(Color.RED),7,9,Spannable.SPAN_EXCLUSIVE_INCLUSIVE);
         textview.setText(style);

     }

 }

显示效果： 

 

参数说明： 
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE 
API里面解释：Spans of type SPAN_EXCLUSIVE_EXCLUSIVE do not expand to include text inserted at either their starting or ending point. They can never have a length of 0 and are automatically removed from the buffer if all the text they cover is removed. 
即在原文本头或尾追加新文本的样式不受原文本样式影响，原文本高亮，新追加文本不高亮。 

Spannable.SPAN_EXCLUSIVE_INCLUSIVE 
API里面解释：Non-0-length spans of type SPAN_INCLUSIVE_EXCLUSIVE expand to include text inserted at their ending point but not at their starting point. When 0-length, they behave like points. 
即在原文本尾追加新文本的样式受原文本样式影响，原来文本尾高亮，新追加文本也高亮。