在android中我们有时候需要对一些标示性的文字进行高亮【用不同的颜色显示】，例如微博中的@**等等。。。这些特效是通过SpannableString这个类来实现的

    思路是将要显示的string进行一次封装str = "#jone# 我的小小测试关于微博中的高亮呵呵呵#jone# 大家都来看看啊@王璇   http://www.jone.cn";spannableString = new SpannableString(str);，然后通过设置SpannableString的setSpan来设置不同的显示效果直接上代码：

package com.example.actiser;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.Map;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

import android.os.Bundle;

import android.os.Handler;

import android.app.Activity;

import android.content.Intent;

import android.graphics.Color;

import android.graphics.drawable.Drawable;

import android.text.Spannable;

import android.text.SpannableString;

import android.text.style.ForegroundColorSpan;

import android.text.style.ImageSpan;

import android.view.Menu;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.TextView;

import android.widget.Toast;

public class MainActivity extends Activity {

public TextView txt;

final String START = "start";

final String END = "end";

String str ="";

final String TOPIC = "#.+?#";

final String NAMEH = "@([\u4e00-\u9fa5A-Za-z0-9_]*)";

final String URLH = "http://.*";

SpannableString spannableString;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

txt = (TextView) findViewById(R.id.tv);

str = "#jone# 我的小小测试关于微博中的高亮呵呵呵#jone# 大家都来看看啊@王璇   http://www.jone.cn";

spannableString = new SpannableString(str);

heightLight(TOPIC,Color.BLUE);

heightLight(NAMEH,Color.RED);

heightLight(URLH,Color.GREEN);

   

   txt.setText(spannableString);

}

private void heightLight(String pattern,int color){

ArrayList<Map<String,String>> lists = getStartAndEnd(Pattern.compile(pattern));

for(Map<String,String> str:lists){

ForegroundColorSpan span = new ForegroundColorSpan(color);

spannableString.setSpan(span,Integer.parseInt(str.get(START)), Integer.parseInt(str.get(END)), Spannable.SPAN_EXCLUSIVE_INCLUSIVE);

}

}

private ArrayList<Map<String,String>> getStartAndEnd(Pattern pattern){

ArrayList<Map<String,String>> lists = new ArrayList<Map<String,String>>(0);

Matcher matcher = pattern.matcher(str);

while(matcher.find()){

Map<String,String> map = new HashMap<String, String>(0);

map.put(START, matcher.start()+"");

map.put(END, matcher.end()+"");

lists.add(map);

}

return lists;

}

@Override

public boolean onCreateOptionsMenu(Menu menu) {

// Inflate the menu; this adds items to the action bar if it is present.

getMenuInflater().inflate(R.menu.main, menu);

return true;

}

}

    这里是原工程

    下一篇接受如何通过代码展示不同的表情图像