利用android SmileyParser类实现文本表情功能

前段时间做新浪微博，遇到个表情微博处理问题，查了些资料，做了个demo：

上图：

要实现这个效果要分为三步：

1.准备表情图片，并新建一个在values文件加下建数组资源文件: arrays.xml

<?xml version="1.0" encoding="UTF-8"?>
<resources xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
  <string-array name="default_smiley_texts">
    <item >"[爱你]"</item>
     <item >[机器人]</item>
    <item >[拜拜]</item>
    <item >"[抱抱]"</item>
    <item >"[悲剧]"</item>
    <item >"[悲伤]"</item>
    <item >"[便便]"</item>
    <item >"[鄙视]"</item>
    <item >"[闭嘴]"</item>
    <item >"[不要]"</item>
    <item >"[馋嘴]"</item>
  </string-array>
  <string-array name="default_smiley_names">
    <item >"爱你"</item>
    <item >"机器人"</item>
    <item>"拜拜"</item>
    <item >"抱抱"</item>
    <item >"悲剧"</item>
    <item >"悲伤"</item>
    <item >"便便"</item>
    <item>"鄙视"</item>
    <item >"闭嘴"</item>
    <item>"不要"</item>
    <item >"馋嘴"</item>
  </string-array>
</resources>

2.到网上google一下SmileyParser 得到SmileyParser类(http://www.oschina.net/code/explore/android-2.2-froyo/com/android/mms/util/SmileyParser.java)根据需求修改下表情图片与特殊字符对应关系。

下面是我demo中使用的类:

package com.my;

import android.content.Context;
import android.text.Spannable;
import android.text.SpannableStringBuilder;
import android.text.style.ImageSpan;

//import com.android.mms.R;

import java.util.HashMap;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * A class for annotating a CharSequence with spans to convert textual emoticons
 * to graphical ones.
 */
public class SmileyParser {
    // Singleton stuff

    private static SmileyParser sInstance;
    public static SmileyParser getInstance() { return sInstance; }
    public static void init(Context context) {
        sInstance = new SmileyParser(context);
    }

    private final Context mContext;
    private final String[] mSmileyTexts;
    private final Pattern mPattern;
    private final HashMap<String, Integer> mSmileyToRes;

    private SmileyParser(Context context) {
        mContext = context;
        mSmileyTexts = mContext.getResources().getStringArray(DEFAULT_SMILEY_TEXTS);
        mSmileyToRes = buildSmileyToRes();
        mPattern = buildPattern();
    }
   
    static class Smileys {
     //表情图片集合
        private static final int[] sIconIds = {
            R.drawable.aini,
            R.drawable.aoteman,
            R.drawable.baibai,
            R.drawable.baobao,
            R.drawable.beiju,
            R.drawable.beishang,
            R.drawable.bianbian,
            R.drawable.bishi,
            R.drawable.bizui,
            R.drawable.buyao,
            R.drawable.chanzui,    
        };
        //将图片映射为 文字
        public static int aini = 0;
        public static int aoteman = 1;
        public static int baibai = 2;
        public static int baobao = 3;
        public static int beiju = 4;
        public static int beishang = 5;
        public static int bianbian = 6;
        public static int bishi = 7;
        public static int bizui = 8;
        public static int buyao = 9;
        public static int chanzui = 10;
 
 
        //得到图片表情 根据id
        public static int getSmileyResource(int which) {
            return sIconIds[which];
        }
    }

    // NOTE: if you change anything about this array, you must make the corresponding change

    // to the string arrays: default_smiley_texts and default_smiley_names in res/values/arrays.xml

    public static final int[] DEFAULT_SMILEY_RES_IDS = {
        Smileys.getSmileyResource(Smileys.aini), // 0
        Smileys.getSmileyResource(Smileys.aoteman), // 1
        Smileys.getSmileyResource(Smileys.baibai), // 2
        Smileys.getSmileyResource(Smileys.baobao), // 3
        Smileys.getSmileyResource(Smileys.beiju), // 4
        Smileys.getSmileyResource(Smileys.beishang), // 5
        Smileys.getSmileyResource(Smileys.bianbian), // 6
        Smileys.getSmileyResource(Smileys.bishi), // 7
        Smileys.getSmileyResource(Smileys.bizui), // 8
        Smileys.getSmileyResource(Smileys.buyao), // 9
        Smileys.getSmileyResource(Smileys.chanzui), // 10

    };

    public static final int DEFAULT_SMILEY_TEXTS = R.array.default_smiley_texts;
    public static final int DEFAULT_SMILEY_NAMES = R.array.default_smiley_names;

    /**
     * Builds the hashtable we use for mapping the string version
     * of a smiley (e.g. ":-)") to a resource ID for the icon version.
     */
    private HashMap<String, Integer> buildSmileyToRes() {
        if (DEFAULT_SMILEY_RES_IDS.length != mSmileyTexts.length) {
            // Throw an exception if someone updated DEFAULT_SMILEY_RES_IDS

            // and failed to update arrays.xml

            throw new IllegalStateException("Smiley resource ID/text mismatch");
        }

        HashMap<String, Integer> smileyToRes =
                            new HashMap<String, Integer>(mSmileyTexts.length);
        for (int i = 0; i < mSmileyTexts.length; i++) {
            smileyToRes.put(mSmileyTexts[i], DEFAULT_SMILEY_RES_IDS[i]);
        }

        return smileyToRes;
    }

   
    /**
     * Builds the regular expression we use to find smileys in {@link #addSmileySpans}.
     */
    //构建正则表达式
    private Pattern buildPattern() {
        // Set the StringBuilder capacity with the assumption that the average

        // smiley is 3 characters long.

        StringBuilder patternString = new StringBuilder(mSmileyTexts.length * 3);

        // Build a regex that looks like (:-)|:-(|...), but escaping the smilies

        // properly so they will be interpreted literally by the regex matcher.

        patternString.append('(');
        for (String s : mSmileyTexts) {
            patternString.append(Pattern.quote(s));
            patternString.append('|');
        }
        // Replace the extra '|' with a ')'

        patternString.replace(patternString.length() - 1, patternString.length(), ")");

        return Pattern.compile(patternString.toString());
    }

    /**
     * Adds ImageSpans to a CharSequence that replace textual emoticons such
     * as :-) with a graphical version.
     *
     * @param text A CharSequence possibly containing emoticons
     * @return A CharSequence annotated with ImageSpans covering any
     * recognized emoticons.
     */
    //根据文本替换成图片
    public CharSequence addSmileySpans(CharSequence text) {
        SpannableStringBuilder builder = new SpannableStringBuilder(text);
        Matcher matcher = mPattern.matcher(text);
        while (matcher.find()) {
            int resId = mSmileyToRes.get(matcher.group());
            builder.setSpan(new ImageSpan(mContext, resId),
                            matcher.start(), matcher.end(),
                            Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
        }
        return builder;
    }
}

 

3.SmileyParser类处理完之后就是使用了

 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);

  TextView tvShow = (TextView) findViewById(R.id.tvShow);
  TextView tvSource = (TextView) findViewById(R.id.tvSource);
  ------------------------SmileyParser类的使用
  //构建处理对象
  SmileyParser.init(this);  
  SmileyParser parser = SmileyParser.getInstance();
  String text = "[鄙视]"+"+"+ "[爱你]"+"+"+"[便便]"+"+"+"[馋嘴]";
  tvSource.setText("原文："+text);
  //通过 调用 SmileyParser类的 addSmileySpans()方法处理 文本
  tvShow.setText(parser.addSmileySpans("SmileyParser类处理后:"+text));
 }

 

评论

1 楼 weisi2375 2012-07-05  

谢谢分享