add ExpandableListFragment which is inherits from ExtendedListFragment

Only difference: it uses an ExpandableListView which supports dividing list into groups

res/layout/list_fragment_expandable.xml

@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- 
+This must be a clone of list_fragment.xml 
+
+EXCEPT: ExpandableListView must be used for @+id/swipe_refresh_files_emptyView
+ -->
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+	android:layout_width="0dp"
+	android:layout_height="match_parent"
+	android:layout_weight="1" >
+
+    <android.support.v4.widget.SwipeRefreshLayout
+        android:id="@+id/swipe_refresh_files"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" >
+
+        <ExpandableListView 
+            android:id="@+id/list_root"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent" />
+        
+    </android.support.v4.widget.SwipeRefreshLayout>
+
+    <android.support.v4.widget.SwipeRefreshLayout
+        android:id="@+id/swipe_refresh_files_emptyView"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:visibility="gone" >
+
+        <ScrollView
+            android:layout_width="match_parent"
+            android:layout_height="match_parent" >
+
+	            <TextView
+			        android:id="@+id/empty_list_view"
+			        android:layout_width="match_parent"
+			        android:layout_height="wrap_content"
+			        android:gravity="center_vertical|center_horizontal"
+			        android:text="@string/empty"
+					android:layout_gravity="center"
+			        android:visibility="visible" />
+
+        </ScrollView>
+    </android.support.v4.widget.SwipeRefreshLayout>
+</FrameLayout>

src/com/owncloud/android/ui/fragment/ExpandableListFragment.java

@@ -0,0 +1,89 @@
+/* ownCloud Android client application
+ *   Copyright (C) 2012 Bartek Przybylski
+ *   Copyright (C) 2012-2013 ownCloud Inc.
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License version 2,
+ *   as published by the Free Software Foundation.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+package com.owncloud.android.ui.fragment;
+
+import java.util.ArrayList;
+
+import android.os.Bundle;
+import android.support.v4.widget.SwipeRefreshLayout;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.AdapterView;
+import android.widget.AdapterView.OnItemClickListener;
+import android.widget.ExpandableListAdapter;
+import android.widget.ExpandableListView;
+import android.widget.ListAdapter;
+import android.widget.ListView;
+import android.widget.TextView;
+
+import com.actionbarsherlock.app.SherlockFragment;
+import com.owncloud.android.R;
+import com.owncloud.android.lib.common.utils.Log_OC;
+import com.owncloud.android.ui.ExtendedListView;
+import com.owncloud.android.ui.activity.OnEnforceableRefreshListener;
+
+/**
+ *  Extending ExtendedListFragment. This allows dividing list in groups.
+ */
+public class ExpandableListFragment extends ExtendedListFragment 
+ {
+    
+    protected ExpandableListView mList;
+    
+    public void setListAdapter(ExpandableListAdapter listAdapter) {
+        mList.setAdapter(listAdapter);
+        mList.invalidate();
+    }
+
+    public ExpandableListView getListView() {
+        return mList;
+    }
+    
+    
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+        Log_OC.e(TAG, "onCreateView");
+        
+        View v = inflater.inflate(R.layout.list_fragment_expandable, null);
+        mEmptyListMessage = (TextView) v.findViewById(R.id.empty_list_view);
+        mList = (ExpandableListView)(v.findViewById(R.id.list_root));
+        mList.setOnItemClickListener(this);
+
+        mList.setDivider(getResources().getDrawable(R.drawable.uploader_list_separator));
+        mList.setDividerHeight(1);
+
+        if (savedInstanceState != null) {
+            int referencePosition = savedInstanceState.getInt(KEY_SAVED_LIST_POSITION);
+            setReferencePosition(referencePosition);
+        }
+        
+        // Pull down refresh
+        mRefreshLayout = (SwipeRefreshLayout) v.findViewById(R.id.swipe_refresh_files);
+        mRefreshEmptyLayout = (SwipeRefreshLayout) v.findViewById(R.id.swipe_refresh_files_emptyView);
+        
+        onCreateSwipeToRefresh(mRefreshLayout);
+        onCreateSwipeToRefresh(mRefreshEmptyLayout);
+        
+        mList.setEmptyView(mRefreshEmptyLayout);
+
+        return v;
+    }
+
+    }

src/com/owncloud/android/ui/fragment/ExtendedListFragment.java

@@ -43,9 +43,9 @@ import com.owncloud.android.ui.activity.OnEnforceableRefreshListener;
 public class ExtendedListFragment extends SherlockFragment 
 implements OnItemClickListener, OnEnforceableRefreshListener {
     
-    private static final String TAG = ExtendedListFragment.class.getSimpleName();
+    protected static final String TAG = ExtendedListFragment.class.getSimpleName();
 
-    private static final String KEY_SAVED_LIST_POSITION = "SAVED_LIST_POSITION"; 
+    protected static final String KEY_SAVED_LIST_POSITION = "SAVED_LIST_POSITION"; 
     private static final String KEY_INDEXES = "INDEXES";
     private static final String KEY_FIRST_POSITIONS= "FIRST_POSITIONS";
     private static final String KEY_TOPS = "TOPS";
@@ -54,9 +54,9 @@ implements OnItemClickListener, OnEnforceableRefreshListener {
 
     protected ExtendedListView mList;
     
-    private SwipeRefreshLayout mRefreshLayout;
-    private SwipeRefreshLayout mRefreshEmptyLayout;
-    private TextView mEmptyListMessage;
+    protected SwipeRefreshLayout mRefreshLayout;
+    protected SwipeRefreshLayout mRefreshEmptyLayout;
+    protected TextView mEmptyListMessage;
     
     // Save the state of the scroll in browsing
     private ArrayList<Integer> mIndexes;
@@ -293,7 +293,7 @@ implements OnItemClickListener, OnEnforceableRefreshListener {
         return (mEmptyListMessage != null) ? mEmptyListMessage.getText().toString() : "";
     }
 
-    private void onCreateSwipeToRefresh(SwipeRefreshLayout refreshLayout) {
+    protected void onCreateSwipeToRefresh(SwipeRefreshLayout refreshLayout) {
         // Colors in animations: background
         refreshLayout.setColorScheme(R.color.background_color, R.color.background_color, R.color.background_color,
                 R.color.background_color);