add preference to sort feeds by unread

AndroidManifest.xml

@@ -3,7 +3,7 @@
       package="org.fox.ttrss"
       android:versionCode="4"
       android:versionName="0.1.3">
-    <uses-sdk android:minSdkVersion="10" />
+    <uses-sdk android:minSdkVersion="8" />
     <supports-screens android:smallScreens="false" android:normalScreens="false" />
 
 	<uses-permission android:name="android.permission.INTERNET" />

res/values/strings.xml

@@ -32,4 +32,5 @@
     <string name="close_article">Close article</string>    
     <string name="share_article">Share article</string>
     <string name="could_not_decode_content">Could not decode content (UnsupportedEncodingException)</string>
+    <string name="sort_feeds_by_unread">Sort feeds by unread count</string>
 </resources>

res/xml/preferences.xml

@@ -18,7 +18,9 @@
            android:key="theme"
            android:defaultValue="THEME_DARK"
            android:entries="@array/pref_theme_names"
-           android:entryValues="@array/pref_theme_values" android:summary="@string/pref_theme_long"/>  
+           android:entryValues="@array/pref_theme_values" android:summary="@string/pref_theme_long"/>
+      
+      <CheckBoxPreference android:title="@string/sort_feeds_by_unread" android:key="sort_feeds_by_unread"/>
    </PreferenceCategory>
   
 </PreferenceScreen>

src/org/fox/ttrss/FeedsFragment.java

@@ -3,6 +3,7 @@ package org.fox.ttrss;
 import java.lang.reflect.Type;
 import java.util.ArrayList;
 import java.util.Collections;
+import java.util.Comparator;
 import java.util.HashMap;
 import java.util.List;
 
@@ -39,6 +40,28 @@ public class FeedsFragment extends Fragment implements OnItemClickListener {
 		public void onFeedSelected(Feed feed);
 	}
 
+	class FeedUnreadComparator implements Comparator<Feed> {
+
+		@Override
+		public int compare(Feed a, Feed b) {
+			if (a.unread != b.unread)
+					return b.unread - a.unread;
+				else
+					return a.title.compareTo(b.title);
+			}
+		
+	}
+	
+
+	class FeedTitleComparator implements Comparator<Feed> {
+
+		@Override
+		public int compare(Feed a, Feed b) {
+			return a.title.compareTo(b.title);
+		}
+		
+	}
+
 	public void showLoading(boolean show) {
 		View v = getView();
 		
@@ -170,9 +193,7 @@ public class FeedsFragment extends Fragment implements OnItemClickListener {
 										for (Feed f : feeds) 
 											m_feeds.add(f);
 										
-										Collections.sort(m_feeds);
-										
-										m_adapter.notifyDataSetInvalidated();
+										sortFeeds();
 										
 										showLoading(false);
 									}
@@ -260,4 +281,17 @@ public class FeedsFragment extends Fragment implements OnItemClickListener {
 			return v;
 		}
 	}
+
+	public void sortFeeds() {
+		Comparator<Feed> cmp;
+		
+		if (m_prefs.getBoolean("sort_feeds_by_unread", false)) {
+			cmp = new FeedUnreadComparator();
+		} else {
+			cmp = new FeedTitleComparator();
+		}
+		
+		Collections.sort(m_feeds, cmp);
+		m_adapter.notifyDataSetInvalidated();
+	}
 }

src/org/fox/ttrss/MainActivity.java

@@ -145,7 +145,14 @@ public class MainActivity extends FragmentActivity implements FeedsFragment.OnFe
 			Intent refresh = new Intent(this, MainActivity.class);
 			startActivity(refresh);
 			finish();
-		}			
+		} else {
+			FeedsFragment frag = (FeedsFragment)getSupportFragmentManager().findFragmentById(R.id.feeds_fragment);
+			
+			if (frag != null) {
+				frag.sortFeeds();
+			}
+		}
+		
 	}
 
 	@Override