initial implementation of recyclerview

7 files changed, 307 insertions, 125 deletions

diff --git a/org.fox.ttrss/build.gradle b/org.fox.ttrss/build.gradle
index d5c23ef9..a8c99c78 100644
--- a/org.fox.ttrss/build.gradle
+++ b/org.fox.ttrss/build.gradle
@@ -1,12 +1,12 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 19
+    compileSdkVersion 21
     buildToolsVersion "20.0.0"
 
     defaultConfig {
         applicationId "org.fox.ttrss"
-        minSdkVersion 8
+        minSdkVersion 9
         targetSdkVersion 19
     }
 
@@ -24,12 +24,14 @@ android {
 
 dependencies {
     compile project(':taskerlocaleapi')
+    compile 'com.android.support:cardview-v7:21.0.0'
+    compile 'com.android.support:recyclerview-v7:21.0.0'
     compile 'com.jeremyfeinstein.slidingmenu:library:1.3@aar'
     compile 'com.readystatesoftware.systembartint:systembartint:1.0.3'
     compile 'com.viewpagerindicator:library:2.4.1'
-    compile 'com.android.support:support-v4:19.1.0'
+    compile 'com.android.support:support-v4:19.0.0'
+    compile 'com.android.support:appcompat-v7:19.0.0'
     compile 'com.google.code.gson:gson:1.7.1'
-    compile 'com.android.support:appcompat-v7:19.1.0'
     compile files('libs/dashclock-api-r1.1.jar')
     compile files('libs/jsoup-1.6.1.jar')
     compile files('libs/universal-image-loader-1.9.3.jar')
diff --git a/org.fox.ttrss/org.fox.ttrss.iml b/org.fox.ttrss/org.fox.ttrss.iml
index ea2bf186..7f3fbd73 100644
--- a/org.fox.ttrss/org.fox.ttrss.iml
+++ b/org.fox.ttrss/org.fox.ttrss.iml
@@ -78,13 +78,16 @@
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/symbols" />
       <excludeFolder url="file://$MODULE_DIR$/build/outputs" />
     </content>
-    <orderEntry type="jdk" jdkName="Android API 19 Platform" jdkType="Android SDK" />
+    <orderEntry type="jdk" jdkName="Android API 21 Platform" jdkType="Android SDK" />
     <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" exported="" name="cardview-v7-21.0.0" level="project" />
+    <orderEntry type="library" exported="" name="appcompat-v7-19.0.0" level="project" />
+    <orderEntry type="library" exported="" name="recyclerview-v7-21.0.0" level="project" />
+    <orderEntry type="library" exported="" name="support-annotations-21.0.0" level="project" />
+    <orderEntry type="library" exported="" name="support-v4-21.0.0" level="project" />
     <orderEntry type="library" exported="" name="dashclock-api-r1.1" level="project" />
     <orderEntry type="library" exported="" name="systembartint-1.0.3" level="project" />
-    <orderEntry type="library" exported="" name="appcompat-v7-19.1.0" level="project" />
     <orderEntry type="library" exported="" name="jsoup-1.6.1" level="project" />
-    <orderEntry type="library" exported="" name="support-v4-19.1.0" level="project" />
     <orderEntry type="library" exported="" name="library-1.3" level="project" />
     <orderEntry type="library" exported="" name="gson-1.7.1" level="project" />
     <orderEntry type="library" exported="" name="library-2.4.1" level="project" />
diff --git a/org.fox.ttrss/src/main/AndroidManifest.xml b/org.fox.ttrss/src/main/AndroidManifest.xml
index 939326af..dfa5f247 100644
--- a/org.fox.ttrss/src/main/AndroidManifest.xml
+++ b/org.fox.ttrss/src/main/AndroidManifest.xml
@@ -37,6 +37,8 @@
             android:name=".FeedsActivity"
             android:label="@string/app_name"
             android:uiOptions="splitActionBarWhenNarrow" >
+            <meta-data android:name="android.support.UI_OPTIONS"
+                android:value="splitActionBarWhenNarrow" />
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
             </intent-filter>
@@ -45,6 +47,8 @@
             android:name=".HeadlinesActivity"
             android:label="@string/app_name"
             android:uiOptions="splitActionBarWhenNarrow" >
+            <meta-data android:name="android.support.UI_OPTIONS"
+                android:value="splitActionBarWhenNarrow" />
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
             </intent-filter>
@@ -68,11 +72,17 @@
             android:name=".offline.OfflineFeedsActivity"
             android:label="@string/app_name"
             android:uiOptions="splitActionBarWhenNarrow" >
+            <meta-data android:name="android.support.UI_OPTIONS"
+                android:value="splitActionBarWhenNarrow" />
+
         </activity>
         <activity
             android:name=".offline.OfflineHeadlinesActivity"
             android:label="@string/app_name"
             android:uiOptions="splitActionBarWhenNarrow" >
+            <meta-data android:name="android.support.UI_OPTIONS"
+                android:value="splitActionBarWhenNarrow" />
+
         </activity>
         <activity
             android:name=".share.ShareActivity"
diff --git a/org.fox.ttrss/src/main/java/org/fox/ttrss/HeadlinesFragment.java b/org.fox.ttrss/src/main/java/org/fox/ttrss/HeadlinesFragment.java
index c14a55ec..d0e6db40 100644
--- a/org.fox.ttrss/src/main/java/org/fox/ttrss/HeadlinesFragment.java
+++ b/org.fox.ttrss/src/main/java/org/fox/ttrss/HeadlinesFragment.java
@@ -13,6 +13,7 @@ import org.fox.ttrss.types.Article;
 import org.fox.ttrss.types.ArticleList;
 import org.fox.ttrss.types.Feed;
 import org.fox.ttrss.util.HeadlinesRequest;
+import org.fox.ttrss.util.RecyclerArrayAdapter;
 import org.fox.ttrss.util.TypefaceCache;
 import org.jsoup.Jsoup;
 import org.jsoup.nodes.Document;
@@ -33,6 +34,8 @@ import android.preference.PreferenceManager;
 import android.provider.OpenableColumns;
 import android.support.v4.app.Fragment;
 import android.support.v4.widget.SwipeRefreshLayout;
+import android.support.v7.widget.LinearLayoutManager;
+import android.support.v7.widget.RecyclerView;
 import android.text.Html;
 import android.util.DisplayMetrics;
 import android.util.Log;
@@ -61,7 +64,7 @@ import com.nostra13.universalimageloader.core.ImageLoader;
 import com.nostra13.universalimageloader.core.assist.FailReason;
 import com.nostra13.universalimageloader.core.listener.ImageLoadingListener;
 
-public class HeadlinesFragment extends Fragment implements OnItemClickListener, OnScrollListener {
+public class HeadlinesFragment extends Fragment {
 	public static enum ArticlesSelection { ALL, NONE, UNREAD };
 
 	public static final int HEADLINES_REQUEST_SIZE = 30;
@@ -314,34 +317,59 @@ public class HeadlinesFragment extends Fragment implements OnItemClickListener,
 	    }
 
 		
-		ListView list = (ListView)view.findViewById(R.id.headlines);		
-		m_adapter = new ArticleListAdapter(getActivity(), R.layout.headlines_row, (ArrayList<Article>)m_articles);
-		
-		/* if (!m_activity.isCompatMode()) {
-			AnimationSet set = new AnimationSet(true);
-	
-		    Animation animation = new AlphaAnimation(0.0f, 1.0f);
-		    animation.setDuration(500);
-		    set.addAnimation(animation);
-	
-		    animation = new TranslateAnimation(
-		        Animation.RELATIVE_TO_SELF, 50.0f,Animation.RELATIVE_TO_SELF, 0.0f,
-		        Animation.RELATIVE_TO_SELF, 0.0f,Animation.RELATIVE_TO_SELF, 0.0f
-		    );
-		    animation.setDuration(1000);
-		    set.addAnimation(animation);
-	
-		    LayoutAnimationController controller = new LayoutAnimationController(set, 0.5f);
-	
-		    list.setLayoutAnimation(controller);
-		} */
-		
+		final RecyclerView list = (RecyclerView)view.findViewById(R.id.headlines);
+
+        m_adapter = new ArticleListAdapter(m_articles);
+
+        list.setLayoutManager(new LinearLayoutManager(getActivity()));
 		list.setAdapter(m_adapter);
-		list.setOnItemClickListener(this);
-		list.setOnScrollListener(this);
-		//list.setEmptyView(view.findViewById(R.id.no_headlines));
 		registerForContextMenu(list);
-		
+
+        list.setOnScrollListener(new RecyclerView.OnScrollListener() {
+            @Override
+            public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
+                super.onScrollStateChanged(recyclerView, newState);
+
+                if (newState == AbsListView.OnScrollListener.SCROLL_STATE_IDLE && m_prefs.getBoolean("headlines_mark_read_scroll", false)) {
+                    Log.d(TAG, "scroll ended!");
+
+                    if (!m_readArticles.isEmpty()) {
+                        m_activity.toggleArticlesUnread(m_readArticles);
+                        m_activity.refresh(false);
+                        m_readArticles.clear();
+                    }
+                }
+
+            }
+
+            @Override
+            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
+                super.onScrolled(recyclerView, dx, dy);
+
+                LinearLayoutManager layoutManager = (LinearLayoutManager) recyclerView.getLayoutManager();
+
+                int firstVisibleItem = layoutManager.findFirstVisibleItemPosition();
+                int visibleItemCount = layoutManager.findLastCompletelyVisibleItemPosition() - layoutManager.findFirstVisibleItemPosition() + 1;
+
+                Log.d(TAG, "fvI= " + firstVisibleItem + " vIC=" + visibleItemCount);
+
+                if (!m_refreshInProgress && m_articles.findById(-1) != null && firstVisibleItem + visibleItemCount == m_articles.size()) {
+                    refresh(true);
+                }
+
+                if (m_prefs.getBoolean("headlines_mark_read_scroll", false) && firstVisibleItem > 0 && !m_autoCatchupDisabled) {
+                    Article a = m_articles.get(firstVisibleItem - 1);
+
+                    if (a != null && a.unread) {
+                        a.unread = false;
+                        m_readArticles.add(a);
+                        m_feed.unread--;
+                    }
+                }
+
+            }
+        });
+
 		//m_activity.m_pullToRefreshAttacher.addRefreshableView(list, this);
 
 		//if (m_activity.isSmallScreen())
@@ -385,7 +413,7 @@ public class HeadlinesFragment extends Fragment implements OnItemClickListener,
 		m_listener = (HeadlinesEventListener) activity;
 	}
 
-	@Override
+	/* @Override
 	public void onItemClick(AdapterView<?> av, View view, int position, long id) {
 		ListView list = (ListView)av;
 		
@@ -404,7 +432,7 @@ public class HeadlinesFragment extends Fragment implements OnItemClickListener,
 				m_adapter.notifyDataSetChanged();
 			}
 		}
-	}
+	} */
 
 	public void refresh(boolean append) {
 		refresh(append, false);	
@@ -426,11 +454,11 @@ public class HeadlinesFragment extends Fragment implements OnItemClickListener,
 			if (!append) {
 				if (getView() != null) {
 					Log.d(TAG, "scroll hack");
-					ListView list = (ListView)getView().findViewById(R.id.headlines);
+					RecyclerView list = (RecyclerView) getView().findViewById(R.id.headlines);
 					m_autoCatchupDisabled = true;
-					list.setSelection(0);
+					//list.setSelection(0);
 					m_autoCatchupDisabled = false;
-					list.setEmptyView(null);
+					//list.setEmptyView(null);
 					m_adapter.clear();
 					m_adapter.notifyDataSetChanged();
 				}
@@ -450,13 +478,13 @@ public class HeadlinesFragment extends Fragment implements OnItemClickListener,
 				protected void onPostExecute(JsonElement result) {
 					if (isDetached()) return;
 					
-					if (getView() != null) {
+					/* if (getView() != null) {
 						ListView list = (ListView)getView().findViewById(R.id.headlines);
 					
 						if (list != null) {
 							list.setEmptyView(getView().findViewById(R.id.no_headlines));
 						}
-					}
+					} */
 					
 					m_activity.setProgressBarVisibility(false);
 					
@@ -651,23 +679,8 @@ public class HeadlinesFragment extends Fragment implements OnItemClickListener,
 		}
 	} */
 	
-	static class HeadlineViewHolder {
-		public TextView titleView;
-		public TextView feedTitleView;
-		public ImageView markedView;
-		public ImageView publishedView;
-		public TextView excerptView;
-		public ImageView flavorImageView;
-		public TextView authorView;
-		public TextView dateView;
-		public CheckBox selectionBoxView;
-		public ImageView menuButtonView;
-		public ViewGroup flavorImageHolder;
-		
-	}
-	
-	private class ArticleListAdapter extends ArrayAdapter<Article> {
-		private ArrayList<Article> items;
+	private class ArticleListAdapter extends RecyclerArrayAdapter<Article, RecyclerView.ViewHolder> {
+		//private ArrayList<Article> items;
 		
 		public static final int VIEW_NORMAL = 0;
 		public static final int VIEW_UNREAD = 1;
@@ -680,7 +693,7 @@ public class HeadlinesFragment extends Fragment implements OnItemClickListener,
 		private final Integer[] origTitleColors = new Integer[VIEW_COUNT];
 		private final int titleHighScoreUnreadColor;
 
-		public ArticleListAdapter(Context context, int textViewResourceId, ArrayList<Article> items) {
+		/* public ArticleListAdapter(Context context, int textViewResourceId, ArrayList<Article> items) {
 			super(context, textViewResourceId, items);
 			this.items = items;
 
@@ -688,15 +701,106 @@ public class HeadlinesFragment extends Fragment implements OnItemClickListener,
 			TypedValue tv = new TypedValue();
 			theme.resolveAttribute(R.attr.headlineTitleHighScoreUnreadTextColor, tv, true);
 			titleHighScoreUnreadColor = tv.data;
-		}
-		
+		} */
+
+        public class HeadlineViewHolder extends RecyclerView.ViewHolder {
+            public TextView titleView;
+            public TextView feedTitleView;
+            public ImageView markedView;
+            public ImageView publishedView;
+            public TextView excerptView;
+            public ImageView flavorImageView;
+            public TextView authorView;
+            public TextView dateView;
+            public CheckBox selectionBoxView;
+            public ImageView menuButtonView;
+            public ViewGroup flavorImageHolder;
+            public View headlineView;
+
+            public HeadlineViewHolder(View v) {
+                super(v);
+
+                titleView = (TextView)v.findViewById(R.id.title);
+                feedTitleView = (TextView)v.findViewById(R.id.feed_title);
+                markedView = (ImageView)v.findViewById(R.id.marked);
+                publishedView = (ImageView)v.findViewById(R.id.published);
+                excerptView = (TextView)v.findViewById(R.id.excerpt);
+                flavorImageView = (ImageView) v.findViewById(R.id.flavor_image);
+                authorView = (TextView)v.findViewById(R.id.author);
+                dateView = (TextView) v.findViewById(R.id.date);
+                selectionBoxView = (CheckBox) v.findViewById(R.id.selected);
+                menuButtonView = (ImageView) v.findViewById(R.id.article_menu_button);
+                flavorImageHolder = (ViewGroup) v.findViewById(R.id.flavorImageHolder);
+                headlineView = v;
+            }
+        }
+
+
+        // Create new views (invoked by the layout manager)
+        @Override
+        public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent,
+                                                       int viewType) {
+            /* // create a new view
+            View v = LayoutInflater.from(parent.getContext())
+                    .inflate(R.layout.my_text_view, parent, false);
+            // set the view's size, margins, paddings and layout parameters
+            ...
+            ViewHolder vh = new ViewHolder(v);
+            return vh; */
+
+            int layoutId = R.layout.headlines_row;
+
+            switch (viewType) {
+                case VIEW_LOADMORE:
+                    layoutId = R.layout.headlines_row_loadmore;
+                    break;
+                case VIEW_UNREAD:
+                    layoutId = R.layout.headlines_row_unread;
+                    break;
+                case VIEW_SELECTED:
+                    layoutId = R.layout.headlines_row_selected;
+                    break;
+                case VIEW_SELECTED_UNREAD:
+                    layoutId = R.layout.headlines_row_selected_unread;
+                    break;
+            }
+
+            View v = LayoutInflater.from(parent.getContext())
+                    .inflate(layoutId, parent, false);
+
+            ((ViewGroup)v).setDescendantFocusability(ViewGroup.FOCUS_BLOCK_DESCENDANTS);
+
+            HeadlineViewHolder vh = new HeadlineViewHolder(v);
+
+            return vh;
+        }
+
+        /* @Override
+        public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
+            HeadlineViewHolder avh = (HeadlineViewHolder) holder;
+
+            // - get element from your dataset at this position
+            // - replace the contents of the view with that element
+            //holder.mTextView.setText(mDataset[position]);
+
+        } */
+
+        public ArticleListAdapter(ArrayList<Article> items) {
+            super(items);
+
+            Theme theme = getActivity().getTheme();
+            TypedValue tv = new TypedValue();
+            theme.resolveAttribute(R.attr.headlineTitleHighScoreUnreadTextColor, tv, true);
+            titleHighScoreUnreadColor = tv.data;
+        }
+
 		public int getViewTypeCount() {
 			return VIEW_COUNT;
 		}
 
 		@Override
 		public int getItemViewType(int position) {
-			Article a = items.get(position);
+			Article a = m_items.get(position);
 			
 			if (a.id == -1) {
 				return VIEW_LOADMORE;
@@ -711,61 +815,32 @@ public class HeadlinesFragment extends Fragment implements OnItemClickListener,
 			}			
 		}
 
-		@Override
-		public View getView(int position, View convertView, ViewGroup parent) {
 
-			View v = convertView;
-			
-			final Article article = items.get(position);
-			HeadlineViewHolder holder;
-			
+        @Override
+        public void onBindViewHolder(RecyclerView.ViewHolder h, final int position) {
+            HeadlineViewHolder holder = (HeadlineViewHolder) h;
+			final Article article = m_items.get(position);
+
 			int headlineFontSize = Integer.parseInt(m_prefs.getString("headlines_font_size_sp", "13"));
 			int headlineSmallFontSize = Math.max(10, Math.min(18, headlineFontSize - 2));
-			
-			if (v == null) {
-				int layoutId = R.layout.headlines_row;
-				
-				switch (getItemViewType(position)) {
-				case VIEW_LOADMORE:
-					layoutId = R.layout.headlines_row_loadmore;
-					break;
-				case VIEW_UNREAD:
-					layoutId = R.layout.headlines_row_unread;
-					break;
-				case VIEW_SELECTED:
-					layoutId = R.layout.headlines_row_selected;
-					break;
-				case VIEW_SELECTED_UNREAD:
-					layoutId = R.layout.headlines_row_selected_unread;
-					break;
-				}
-				
-				LayoutInflater vi = (LayoutInflater)getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
-				v = vi.inflate(layoutId, null);
-
-				holder = new HeadlineViewHolder();
-				holder.titleView = (TextView)v.findViewById(R.id.title);
-
-				holder.feedTitleView = (TextView)v.findViewById(R.id.feed_title);
-				holder.markedView = (ImageView)v.findViewById(R.id.marked);
-				holder.publishedView = (ImageView)v.findViewById(R.id.published);
-				holder.excerptView = (TextView)v.findViewById(R.id.excerpt);
-				holder.flavorImageView = (ImageView) v.findViewById(R.id.flavor_image);
-				holder.authorView = (TextView)v.findViewById(R.id.author);
-				holder.dateView = (TextView) v.findViewById(R.id.date);
-				holder.selectionBoxView = (CheckBox) v.findViewById(R.id.selected);
-				holder.menuButtonView = (ImageView) v.findViewById(R.id.article_menu_button);
-				holder.flavorImageHolder = (ViewGroup) v.findViewById(R.id.flavorImageHolder);
-				
-				v.setTag(holder);
-				
-				// http://code.google.com/p/android/issues/detail?id=3414
-				((ViewGroup)v).setDescendantFocusability(ViewGroup.FOCUS_BLOCK_DESCENDANTS);
-			} else {
-				holder = (HeadlineViewHolder) v.getTag();
-			}
-			
-			if (holder.titleView != null) {				
+
+            holder.headlineView.setOnClickListener(new OnClickListener() {
+                @Override
+                public void onClick(View view) {
+                    if (article.id >= 0) {
+                        m_listener.onArticleSelected(article);
+
+                        // only set active article when it makes sense (in HeadlinesActivity)
+                        if (getActivity().findViewById(R.id.article_fragment) != null) {
+                            m_activeArticle = article;
+                        }
+
+                        m_adapter.notifyDataSetChanged();
+                    }
+                }
+            });
+
+            if (holder.titleView != null) {
 				holder.titleView.setText(Html.fromHtml(article.title));
 				
 				if (m_prefs.getBoolean("enable_condensed_fonts", false)) {
@@ -982,8 +1057,6 @@ public class HeadlinesFragment extends Fragment implements OnItemClickListener,
 					}
 				});								
 			}
-			
-			return v;
 		}
 
 		private void adjustTitleTextView(int score, TextView tv, int position) {
@@ -1067,7 +1140,7 @@ public class HeadlinesFragment extends Fragment implements OnItemClickListener,
 		return tmp;
 	}
 
-	@Override
+	/* @Override
 	public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
 		if (!m_refreshInProgress && m_articles.findById(-1) != null && firstVisibleItem + visibleItemCount == m_articles.size()) {
 			refresh(true);
@@ -1093,7 +1166,7 @@ public class HeadlinesFragment extends Fragment implements OnItemClickListener,
 				m_readArticles.clear();
 			}
 		}
-	}
+	} */
 
 	public Article getActiveArticle() {
 		return m_activeArticle;
diff --git a/org.fox.ttrss/src/main/java/org/fox/ttrss/OnlineActivity.java b/org.fox.ttrss/src/main/java/org/fox/ttrss/OnlineActivity.java
index c1adef52..10cc1c9a 100644
--- a/org.fox.ttrss/src/main/java/org/fox/ttrss/OnlineActivity.java
+++ b/org.fox.ttrss/src/main/java/org/fox/ttrss/OnlineActivity.java
@@ -152,11 +152,11 @@ public class OnlineActivity extends CommonActivity {
 
 		setAppTheme(m_prefs);
 
-		super.onCreate(savedInstanceState);
+        if (canUseProgress()) {
+            requestWindowFeature(Window.FEATURE_PROGRESS);
+        }
 
-		if (canUseProgress()) {
-			requestWindowFeature(Window.FEATURE_PROGRESS);
-		}
+        super.onCreate(savedInstanceState);
 
 		//requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
 
diff --git a/org.fox.ttrss/src/main/java/org/fox/ttrss/util/RecyclerArrayAdapter.java b/org.fox.ttrss/src/main/java/org/fox/ttrss/util/RecyclerArrayAdapter.java
new file mode 100644
index 00000000..2f6fdd82
--- /dev/null
+++ b/org.fox.ttrss/src/main/java/org/fox/ttrss/util/RecyclerArrayAdapter.java
@@ -0,0 +1,94 @@
+package org.fox.ttrss.util;
+
+import android.support.v7.widget.RecyclerView;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
+
+/**
+ * Created by pascalwelsch on 04.07.14.
+ */
+public abstract class RecyclerArrayAdapter<T, VH extends RecyclerView.ViewHolder>
+        extends RecyclerView.Adapter<VH> {
+
+    protected List<T> m_items;
+
+    public RecyclerArrayAdapter(final List<T> objects) {
+        m_items = objects;
+    }
+
+    /**
+     * Adds the specified object at the end of the array.
+     *
+     * @param object The object to add at the end of the array.
+     */
+    public void add(final T object) {
+        m_items.add(object);
+        notifyItemInserted(getItemCount() - 1);
+    }
+
+    /**
+     * Remove all elements from the list.
+     */
+    public void clear() {
+        final int size = getItemCount();
+        m_items.clear();
+        notifyItemRangeRemoved(0, size);
+    }
+
+    @Override
+    public int getItemCount() {
+        return m_items.size();
+    }
+
+    public T getItem(final int position) {
+        return m_items.get(position);
+    }
+
+    public long getItemId(final int position) {
+        return position;
+    }
+
+    /**
+     * Returns the position of the specified item in the array.
+     *
+     * @param item The item to retrieve the position of.
+     * @return The position of the specified item.
+     */
+    public int getPosition(final T item) {
+        return m_items.indexOf(item);
+    }
+
+    /**
+     * Inserts the specified object at the specified index in the array.
+     *
+     * @param object The object to insert into the array.
+     * @param index  The index at which the object must be inserted.
+     */
+    public void insert(final T object, int index) {
+        m_items.add(index, object);
+        notifyItemInserted(index);
+
+    }
+
+    /**
+     * Removes the specified object from the array.
+     *
+     * @param object The object to remove.
+     */
+    public void remove(T object) {
+        final int position = getPosition(object);
+        m_items.remove(object);
+        notifyItemRemoved(position);
+    }
+
+    /**
+     * Sorts the content of this adapter using the specified comparator.
+     *
+     * @param comparator The comparator used to sort the objects contained in this adapter.
+     */
+    public void sort(Comparator<? super T> comparator) {
+        Collections.sort(m_items, comparator);
+        notifyItemRangeChanged(0, getItemCount());
+    }
+}
\ No newline at end of file
diff --git a/org.fox.ttrss/src/main/res/layout/headlines_fragment.xml b/org.fox.ttrss/src/main/res/layout/headlines_fragment.xml
index 63f7f856..16e25520 100644
--- a/org.fox.ttrss/src/main/res/layout/headlines_fragment.xml
+++ b/org.fox.ttrss/src/main/res/layout/headlines_fragment.xml
@@ -9,15 +9,15 @@
     	android:layout_width="match_parent"
     	android:layout_height="match_parent" >
     
-	   <ListView
+	   <android.support.v7.widget.RecyclerView
 	       android:id="@+id/headlines"
+           android:scrollbars="vertical"
 	       android:layout_width="match_parent"
-	       android:layoutAnimation="@anim/layout_headline"
 	       android:dividerHeight="0dp"
 	       android:divider="@null"
 	       android:paddingTop="3dp"
 	       android:layout_height="match_parent" >
-	   </ListView>
+	   </android.support.v7.widget.RecyclerView>
 	</android.support.v4.widget.SwipeRefreshLayout>
 
     <LinearLayout