Fix: Use unicode to locate emojis.

Author: Sam1301

app/build.gradle

@@ -72,9 +72,9 @@ dependencies {
     compile 'com.android.support:recyclerview-v7:24.1.1'
     compile 'com.google.android.gms:play-services-gcm:8.4.0'
     compile 'com.google.android.gms:play-services-auth:8.4.0'
-    compile 'com.squareup.retrofit2:retrofit:2.2.0'
+    compile 'com.squareup.retrofit2:retrofit:2+'
     compile 'com.squareup.okhttp3:logging-interceptor:3+'
-    compile 'com.squareup.retrofit2:converter-gson:2.2.0'
+    compile 'com.squareup.retrofit2:converter-gson:2+'
     compile 'com.squareup.okhttp3:okhttp:3+'
     compile 'com.j256.ormlite:ormlite-core:5.0'
     compile 'com.j256.ormlite:ormlite-android:5.0'

app/src/main/java/com/zulip/android/models/Message.java

@@ -340,7 +340,15 @@ public static Spanned formatContent(String source, final ZulipApp app) {
         Html.ImageGetter emojiGetter = new Html.ImageGetter() {
             @Override
             public Drawable getDrawable(String source) {
-                    String filename = "emoji/" + source.replace(":", "") + ".png";
+                int imagesIndex;
+                String filename;
+                if (source != null) {
+                    imagesIndex = source.indexOf("images/");
+                    if (imagesIndex != -1) {
+                        filename = source.substring(imagesIndex + "images/".length());
+                    } else {
+                        filename = "emoji/unicode/" + source + ".png";
+                    }
                     try {
                         Drawable drawable = Drawable.createFromStream(context
                                 .getAssets().open(filename), filename);
@@ -361,6 +369,7 @@ public Drawable getDrawable(String source) {
                     } catch (IOException e) {
                         Log.e("RecyclerMessageAdapter", e.getMessage());
                     }
+                }
                 return null;
             }
         };

app/src/main/java/com/zulip/android/networking/AsyncGetEvents.java

@@ -412,7 +412,6 @@ private void processMessages(final List<Message> messages) {
         // In task thread
         int lastMessageId = messages.get(messages.size() - 1).getID();
         MessageRange.updateNewMessagesRange(app, lastMessageId);
-
         if (mActivity != null) {
             mActivity.runOnUiThread(new Runnable() {
                 @Override

app/src/main/java/com/zulip/android/util/CustomHtmlToSpannedConverter.java

@@ -176,7 +176,7 @@ private static void end(SpannableStringBuilder text, Class kind, Object repl) {
     private static void startImg(SpannableStringBuilder text,
                                  Attributes attributes, Html.ImageGetter img) {
         String cssClass = attributes.getValue("class");
-        String src = cssClass != null && cssClass.startsWith("emoji") ? attributes.getValue("title") : attributes.getValue("", "src");
+        String src = cssClass != null &&  attributes.getValue("", "src") == null ? cssClass.substring(cssClass.indexOf("-") + 1) : attributes.getValue("", "src");
         Drawable d = null;
 
         if (img != null) {