EmojiUtils

package com.fone.livechannel.ui.room;
import java.io.FileInputStream;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.text.SpannableString;
import android.text.Spanned;
import android.text.style.DynamicDrawableSpan;
import android.text.style.ForegroundColorSpan;
import android.text.style.ImageSpan;
import android.view.WindowManager;
import com.fone.livechannel.AppAplication;
import com.fone.livechannel.R;
import com.fone.livechannel.ui.room.websocket.WSConstant;
import com.fone.livechannel.utils.L;
public class EmojiUtils {
	private static String TAG = "EmojiUtils";
	public EmojiUtils() {
	}
	public static SpannableString getEmojiString(Context context, String msg,
			String regex, String bySpeaker) {
		SpannableString spannableString = new SpannableString(msg);
		Pattern pattern = Pattern.compile(regex, Pattern.CASE_INSENSITIVE); // 通过传入的正则表达式来生成一个pattern
		try {
			dealEmoji(context, spannableString, pattern, 0, bySpeaker, msg);
		} catch (Exception e) {
			L.e(TAG, TAG, e.getMessage());
		}
		return spannableString;
	}
	private static void dealEmoji(Context context,
			SpannableString spannableString, Pattern pattern, int start, String bySpeaker, String msg)
			throws Exception {
		String code = null;
		Matcher matcher = pattern.matcher(spannableString);
		while (matcher.find()) {
			String key = matcher.group();
			Bitmap bm = null;
			if (matcher.start() < start) {
				continue;
			}
			
			if (key != null && key.contains(WSConstant.ADD_ICON)) {
				code = key.substring(0, key.lastIndexOf(WSConstant.ADD_ICON));
			}
			
			if (code.startsWith("B_1")) {
				bm = BitmapFactory.decodeResource(context.getResources(),
						R.drawable.chat_gift_free_acquire);
			} else if (code.startsWith("B_2")) {
				bm = BitmapFactory.decodeResource(context.getResources(),
						R.drawable.icon_vip);
			} else {
				bm = BitmapFactory.decodeFile(RoomUtil.IMAGE_BASE_PATH + code);
			}
			
			if (bm == null) {
				FileInputStream inStream = context.openFileInput(code);// 只需传文件名
				bm = BitmapFactory.decodeStream(inStream);
			}
			
			if (bm == null) {
				break;
			}
			int size;
			WindowManager wm = (WindowManager) context
					.getSystemService(Context.WINDOW_SERVICE);
			int screenWidth = wm.getDefaultDisplay().getWidth();
			if (code.startsWith("Q_")) {
				size = screenWidth / 20;
			} else if (code.startsWith("G_")) {
				size = screenWidth / 12;
			} else if (code.startsWith("B")) {
				size = screenWidth / 22;
			} else {
				size = bm.getWidth() * 2;
			}
			
			Drawable drawable = new BitmapDrawable(bm);
			drawable.setBounds(0, 0, size, size);
			ImageSpan imageSpan = null;
			
			if (code.startsWith("B_2")) {
				imageSpan = new ImageSpan(drawable,
						DynamicDrawableSpan.ALIGN_BASELINE); // ?通过图片资源id来得到bitmap，用一个ImageSpan来包装
			} else {
				imageSpan = new ImageSpan(drawable,
						DynamicDrawableSpan.ALIGN_BOTTOM); // ?通过图片资源id来得到bitmap，用一个ImageSpan来包装
			}
			
			int end = matcher.start() + key.length(); // 计算该图片名字的长度，也就是要替换的字符串的长度
			spannableString.setSpan(imageSpan, matcher.start(), end,
					Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); // 将该图片替换字符串中规定的位置中
		   
			int bySpeakerStart = msg.indexOf(bySpeaker);
		   int bySpeakerEnd = bySpeakerStart + bySpeaker.length();
			int colorid = AppAplication.getGlobalContext().getResources().getColor(R.color.room_tab_text_click_color);
			
			if (bySpeakerEnd != 0){
				spannableString.setSpan(new ForegroundColorSpan(colorid), bySpeakerStart, bySpeakerEnd, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
			}
			
			if (end < spannableString.length()) { // 如果整个字符串还未验证完，则继续
				dealEmoji(context, spannableString, pattern, end, bySpeaker, msg);
			}
			break;
		}
	}
}

来自为知笔记(Wiz)