bug 721216 - Bitmap compression on main thread causes the tab strip to take a long time to appear r=pcwalton

mobile/android/base/GeckoApp.java

@@ -594,11 +594,10 @@ abstract public class GeckoApp
         }
     }
 
-    void getAndProcessThumbnailForTab(Tab tab) {
-        Bitmap bitmap = null;
-        if (Tabs.getInstance().isSelectedTab(tab))
-            bitmap = mSoftwareLayerClient.getBitmap();
-
+    void getAndProcessThumbnailForTab(final Tab tab) {
+        final Bitmap bitmap = Tabs.getInstance().isSelectedTab(tab) ?
+            mSoftwareLayerClient.getBitmap() : null;
+        
         if (bitmap != null) {
             ByteArrayOutputStream bos = new ByteArrayOutputStream();
             bitmap.compress(Bitmap.CompressFormat.PNG, 0, bos);

mobile/android/base/Tabs.java

@@ -288,8 +288,12 @@ public class Tabs implements GeckoEventListener {
     }
 
     public void refreshThumbnails() {
-        Iterator<Tab> iterator = tabs.values().iterator();
-        while (iterator.hasNext())
-            GeckoApp.mAppContext.getAndProcessThumbnailForTab(iterator.next());
+        GeckoAppShell.getHandler().post(new Runnable() {
+            public void run() {
+                Iterator<Tab> iterator = tabs.values().iterator();
+                while (iterator.hasNext())
+                    GeckoApp.mAppContext.getAndProcessThumbnailForTab(iterator.next());
+            }
+        });
     }
 }

mobile/android/base/TabsTray.java

@@ -91,8 +91,8 @@ public class TabsTray extends Activity implements GeckoApp.OnTabsChangedListener
             }
         });
 
-        Tabs.getInstance().refreshThumbnails();
         GeckoApp.registerOnTabsChangedListener(this);
+        Tabs.getInstance().refreshThumbnails();
         onTabsChanged(null);
     }