change opacity on emoji only messages

src/main/java/eu/siacs/conversations/ui/adapter/MessageAdapter.java

@@ -390,11 +390,16 @@ public class MessageAdapter extends ArrayAdapter<Message> implements CopyTextVie
 		viewHolder.messageBody.setTextIsSelectable(false);
 	}
 
-	private void displayEmojiMessage(final ViewHolder viewHolder, final String body) {
+	private void displayEmojiMessage(final ViewHolder viewHolder, final String body, final boolean darkBackground) {
 		viewHolder.download_button.setVisibility(View.GONE);
 		viewHolder.audioPlayer.setVisibility(View.GONE);
 		viewHolder.image.setVisibility(View.GONE);
 		viewHolder.messageBody.setVisibility(View.VISIBLE);
+		if (darkBackground) {
+			viewHolder.messageBody.setTextAppearance(getContext(), R.style.TextAppearance_Conversations_Body1_Emoji_OnDark);
+		} else {
+			viewHolder.messageBody.setTextAppearance(getContext(), R.style.TextAppearance_Conversations_Body1_Emoji);
+		}
 		Spannable span = new SpannableString(body);
 		float size = Emoticons.isEmoji(body) ? 3.0f : 2.0f;
 		span.setSpan(new RelativeSizeSpan(size), 0, body.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
@@ -817,7 +822,7 @@ public class MessageAdapter extends ArrayAdapter<Message> implements CopyTextVie
 			if (message.isGeoUri()) {
 				displayLocationMessage(viewHolder, message);
 			} else if (message.bodyIsOnlyEmojis() && message.getType() != Message.TYPE_PRIVATE) {
-				displayEmojiMessage(viewHolder, message.getBody().trim());
+				displayEmojiMessage(viewHolder, message.getBody().trim(), darkBackground);
 			} else if (message.treatAsDownloadable()) {
 				try {
 					URL url = new URL(message.getBody());

src/main/res/values/attrs.xml

@@ -14,6 +14,7 @@
     <attr name="color_background_secondary" format="reference|color" />
     <attr name="color_background_primary" format="reference|color" />
     <attr name="color_warning" format="reference|color"/>
+    <attr name="EmojiColor" format="reference|color"/>
 
     <attr name="ic_send_cancel_offline" format="reference"/>
     <attr name="ic_send_location_offline" format="reference"/>

src/main/res/values/colors.xml

@@ -5,6 +5,7 @@
 	<color name="primary800">#ff026100</color>
 	<color name="primary900">#ff024500</color>
 	<color name="accent">#ff0091ea</color>
+	<color name="black">#ff000000</color>
 	<color name="black87">#de000000</color>
 	<color name="black54">#8a000000</color>
 	<color name="black26">#42000000</color>

src/main/res/values/styles.xml

@@ -99,6 +99,14 @@
         <item name="android:textColorLink">@color/white</item>
     </style>
 
+    <style name="TextAppearance.Conversations.Body1.Emoji.OnDark" parent="TextAppearance.Conversations.Body1">
+        <item name="android:textColor">@color/white</item>
+    </style>
+
+    <style name="TextAppearance.Conversations.Body1.Emoji" parent="TextAppearance.Conversations.Body1">
+        <item name="android:textColor">?EmojiColor</item>
+    </style>
+
     <style name="TextAppearance.Conversations.Body1.Secondary.OnDark" parent="TextAppearance.Conversations.Body1">
         <item name="android:textColor">@color/white70</item>
     </style>

src/main/res/values/themes.xml

@@ -11,6 +11,8 @@
         <item name="color_background_secondary">@color/grey200</item>
         <item name="color_warning">@color/red_a700</item>
 
+        <item name="EmojiColor">@color/black</item>
+
         <item name="windowActionModeOverlay">true</item>
         <item name="android:actionModeBackground">@color/accent</item>
 
@@ -94,6 +96,8 @@
         <item name="color_background_secondary">@color/grey900</item>
         <item name="color_warning">@color/red_a100</item>
 
+        <item name="EmojiColor">@color/white</item>
+
         <item name="windowActionModeOverlay">true</item>
         <item name="android:actionModeBackground">@color/accent</item>