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： 

Java代码  


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： 

Java代码  


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。