use cache

src/com/tracyzhang/xgif/MainActivity.java

@@ -37,6 +37,12 @@ protected void onCreate(Bundle savedInstanceState) {
 		msgs.add("You can download the demo from https://github.com/TracyZhangLei");
 		msgs.add("[微笑][微笑][微笑]");
 		msgs.add("[咖啡][微笑][咖啡]");
+		msgs.add("[咖啡][微笑][咖啡]");
+		msgs.add("[咖啡][微笑][咖啡]");
+		msgs.add("[咖啡][微笑][咖啡]");
+		msgs.add("[咖啡][微笑][咖啡]");
+		msgs.add("[咖啡][微笑][咖啡]");
+		msgs.add("[咖啡][微笑][咖啡]");
 
 		msgs.add("中华人民共和国万岁！[微笑]");
 		msgs.add("Long live the People's Republic of China！[微笑]");

src/com/tracyzhang/xgif/adapter/ChatAdapter.java

@@ -1,6 +1,8 @@
 package com.tracyzhang.xgif.adapter;
 
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
@@ -30,7 +32,7 @@ public class ChatAdapter extends BaseAdapter{
 
 	private Pattern EMOTION_URL = Pattern.compile("\\[(\\S+?)\\]");
 	private FaceManager fm;
-
+	private Map<String,SpannableString> cacheMap;//cache
 	private Context cxt;
 	private List<String> data;
 
@@ -39,6 +41,7 @@ public ChatAdapter(Context cxt, List<String> data) {
 		this.cxt = cxt;
 		this.data = data;
 		fm = FaceManager.getInstance();
+		cacheMap = new HashMap<String,SpannableString>();
 	}
 
 	@Override
@@ -77,26 +80,36 @@ class ViewHolder{
 		TextView msg;
 	}
 
-	private CharSequence convertNormalStringToSpannableString(String message , final TextView tv) {
-		SpannableString value = SpannableString.valueOf(message);
-		Matcher localMatcher = EMOTION_URL.matcher(value);
-		while (localMatcher.find()) {
-			String str2 = localMatcher.group(0);
-			int k = localMatcher.start();
-			int m = localMatcher.end();
-			if (m - k < 8) {
-				int face = fm.getFaceId(str2);
-				if(-1!=face){
-					AnimatedImageSpan localImageSpan = new AnimatedImageSpan(new AnimatedGifDrawable(cxt.getResources().openRawResource(face), new AnimatedGifDrawable.UpdateListener() {   
-					    @Override
-					    public void update() {//update the textview
-					        tv.postInvalidate();
-					    }
-					}));
-					value.setSpan(localImageSpan, k, m, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
+	/**
+	 * check the cacke first
+	 * @param message
+	 * @param tv
+	 * @return
+	 */
+	private SpannableString convertNormalStringToSpannableString(String message , final TextView tv) {
+		SpannableString value = cacheMap.get(message);
+		if(null == value){
+			value = SpannableString.valueOf(message);
+			Matcher localMatcher = EMOTION_URL.matcher(value);
+			while (localMatcher.find()) {
+				String str2 = localMatcher.group(0);
+				int k = localMatcher.start();
+				int m = localMatcher.end();
+				if (m - k < 8) {
+					int face = fm.getFaceId(str2);
+					if(-1!=face){
+						AnimatedImageSpan localImageSpan = new AnimatedImageSpan(new AnimatedGifDrawable(cxt.getResources().openRawResource(face), new AnimatedGifDrawable.UpdateListener() {   
+						    @Override
+						    public void update() {//update the textview
+						        tv.postInvalidate();
+						    }
+						}));
+						value.setSpan(localImageSpan, k, m, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
+					}
 				}
 			}
 		}
 		return value;
 	}
+
 }