Fixed. Footer message should be showed in the list view mode. Also added in grid view mode.

res/layout/list_fragment.xml

@@ -30,7 +30,7 @@
         android:layout_weight="1"
         android:footerDividersEnabled="false" > 
         
-        <com.owncloud.android.ui.ExtendedListView
+        <third_parties.liaohuqiu.GridViewWithHeaderAndFooter
             android:id="@+id/list_root"
             android:layout_width="match_parent"
             android:layout_height="match_parent"

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

@@ -29,13 +29,12 @@ import android.widget.AdapterView;
 import android.widget.AdapterView.OnItemClickListener;
 import android.widget.GridView;
 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 third_parties.liaohuqiu.GridViewWithHeaderAndFooter;
 import com.owncloud.android.ui.activity.OnEnforceableRefreshListener;
 
 /**
@@ -53,8 +52,6 @@ implements OnItemClickListener, OnEnforceableRefreshListener {
     private static final String KEY_HEIGHT_CELL = "HEIGHT_CELL";
     private static final String KEY_EMPTY_LIST_MESSAGE = "EMPTY_LIST_MESSAGE";
 
-    protected ExtendedListView mList;
-
     private SwipeRefreshLayout mRefreshLayout;
     private SwipeRefreshLayout mRefreshEmptyLayout;
     private TextView mEmptyListMessage;
@@ -67,7 +64,7 @@ implements OnItemClickListener, OnEnforceableRefreshListener {
 
     private OnEnforceableRefreshListener mOnRefreshListener = null;
     
-    protected GridView imageView;
+    protected GridViewWithHeaderAndFooter imageView;
        
     public void setListAdapter(ListAdapter listAdapter) {
         imageView.setAdapter(listAdapter);
@@ -80,8 +77,8 @@ implements OnItemClickListener, OnEnforceableRefreshListener {
 
     public void setFooterView(View footer) {
         // TODO find solution
-        // mList.addFooterView(footer, null, false);
-        // mList.invalidate();
+        imageView.addFooterView(footer, null, false);
+        imageView.invalidate();
     }
 
 
@@ -103,7 +100,7 @@ implements OnItemClickListener, OnEnforceableRefreshListener {
 
         View v = inflater.inflate(R.layout.list_fragment, null);
         
-        imageView = (ExtendedListView)(v.findViewById(R.id.list_root));
+        imageView = (GridViewWithHeaderAndFooter)(v.findViewById(R.id.list_root));
         imageView.setOnItemClickListener(this);
 
         if (savedInstanceState != null) {
@@ -114,10 +111,13 @@ implements OnItemClickListener, OnEnforceableRefreshListener {
         // Pull down refresh
         mRefreshLayout = (SwipeRefreshLayout) v.findViewById(R.id.swipe_refresh_files);
         mRefreshEmptyLayout = (SwipeRefreshLayout) v.findViewById(R.id.swipe_refresh_files_emptyView);
+        mEmptyListMessage = (TextView) v.findViewById(R.id.empty_list_view);
         
         onCreateSwipeToRefresh(mRefreshLayout);
         onCreateSwipeToRefresh(mRefreshEmptyLayout);
 
+        imageView.setEmptyView(mRefreshEmptyLayout);
+        
         return v;
     }
 

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

@@ -225,11 +225,11 @@ public class LocalFileListFragment extends ExtendedListFragment {
      */
     public String[] getCheckedFilePaths() {
         ArrayList<String> result = new ArrayList<String>();
-        SparseBooleanArray positions = mList.getCheckedItemPositions();
+        SparseBooleanArray positions = imageView.getCheckedItemPositions();
         if (positions.size() > 0) {
             for (int i = 0; i < positions.size(); i++) {
                 if (positions.get(positions.keyAt(i)) == true) {
-                    result.add(((File) mList.getItemAtPosition(positions.keyAt(i))).getAbsolutePath());
+                    result.add(((File) imageView.getItemAtPosition(positions.keyAt(i))).getAbsolutePath());
                 }
             }
 

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

@@ -395,13 +395,12 @@ public class OCFileListFragment extends ExtendedListFragment {
             mFile = directory;
 
             Vector<OCFile> files = storageManager.getFolderContent(directory);
-            if (DisplayUtils.decideViewLayout(files)){
-                switchImageView();
-            } else {
             // Update Footer
             TextView footerText = (TextView) mFooterView.findViewById(R.id.footerText);
             footerText.setText(generateFooterText(directory));
-
+            if (DisplayUtils.decideViewLayout(files)){
+                switchImageView();
+            } else {
                 switchFileView();
             }
         }

src/third_parties/liaohuqiu/GridViewWithHeaderAndFooter.java

@@ -0,0 +1,787 @@
+
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package third_parties.liaohuqiu;
+
+
+        import android.annotation.TargetApi;
+        import android.content.Context;
+        import android.database.DataSetObservable;
+        import android.database.DataSetObserver;
+        import android.os.Build;
+        import android.util.AttributeSet;
+        import android.util.Log;
+        import android.view.View;
+        import android.view.ViewGroup;
+        import android.widget.*;
+
+        import java.lang.reflect.Field;
+        import java.util.ArrayList;
+
+/**
+ * A {@link GridView} that supports adding header rows in a
+ * very similar way to {@link android.widget.ListView}.
+ * See {@link GridViewWithHeaderAndFooter#addHeaderView(View, Object, boolean)}
+ * See {@link GridViewWithHeaderAndFooter#addFooterView(View, Object, boolean)}
+ */
+public class GridViewWithHeaderAndFooter extends GridView {
+
+    public static boolean DEBUG = false;
+
+    /**
+     * A class that represents a fixed view in a list, for example a header at the top
+     * or a footer at the bottom.
+     */
+    private static class FixedViewInfo {
+        /**
+         * The view to add to the grid
+         */
+        public View view;
+        public ViewGroup viewContainer;
+        /**
+         * The data backing the view. This is returned from {@link ListAdapter#getItem(int)}.
+         */
+        public Object data;
+        /**
+         * <code>true</code> if the fixed view should be selectable in the grid
+         */
+        public boolean isSelectable;
+    }
+
+    private int mNumColumns = AUTO_FIT;
+    private View mViewForMeasureRowHeight = null;
+    private int mRowHeight = -1;
+    private static final String LOG_TAG = "grid-view-with-header-and-footer";
+
+    private ArrayList<FixedViewInfo> mHeaderViewInfos = new ArrayList<FixedViewInfo>();
+    private ArrayList<FixedViewInfo> mFooterViewInfos = new ArrayList<FixedViewInfo>();
+
+    private void initHeaderGridView() {
+    }
+
+    public GridViewWithHeaderAndFooter(Context context) {
+        super(context);
+        initHeaderGridView();
+    }
+
+    public GridViewWithHeaderAndFooter(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        initHeaderGridView();
+    }
+
+    public GridViewWithHeaderAndFooter(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+        initHeaderGridView();
+    }
+
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+        ListAdapter adapter = getAdapter();
+        if (adapter != null && adapter instanceof HeaderViewGridAdapter) {
+            ((HeaderViewGridAdapter) adapter).setNumColumns(getNumColumnsCompatible());
+            ((HeaderViewGridAdapter) adapter).setRowHeight(getRowHeight());
+        }
+    }
+
+    @Override
+    public void setClipChildren(boolean clipChildren) {
+        // Ignore, since the header rows depend on not being clipped
+    }
+
+    /**
+     * Do not call this method unless you know how it works.
+     *
+     * @param clipChildren
+     */
+    public void setClipChildrenSupper(boolean clipChildren) {
+        super.setClipChildren(false);
+    }
+
+    /**
+     * Add a fixed view to appear at the top of the grid. If addHeaderView is
+     * called more than once, the views will appear in the order they were
+     * added. Views added using this call can take focus if they want.
+     * <p/>
+     * NOTE: Call this before calling setAdapter. This is so HeaderGridView can wrap
+     * the supplied cursor with one that will also account for header views.
+     *
+     * @param v The view to add.
+     */
+    public void addHeaderView(View v) {
+        addHeaderView(v, null, true);
+    }
+
+    /**
+     * Add a fixed view to appear at the top of the grid. If addHeaderView is
+     * called more than once, the views will appear in the order they were
+     * added. Views added using this call can take focus if they want.
+     * <p/>
+     * NOTE: Call this before calling setAdapter. This is so HeaderGridView can wrap
+     * the supplied cursor with one that will also account for header views.
+     *
+     * @param v            The view to add.
+     * @param data         Data to associate with this view
+     * @param isSelectable whether the item is selectable
+     */
+    public void addHeaderView(View v, Object data, boolean isSelectable) {
+        ListAdapter adapter = getAdapter();
+        if (adapter != null && !(adapter instanceof HeaderViewGridAdapter)) {
+            throw new IllegalStateException(
+                    "Cannot add header view to grid -- setAdapter has already been called.");
+        }
+
+        ViewGroup.LayoutParams lyp = v.getLayoutParams();
+
+        FixedViewInfo info = new FixedViewInfo();
+        FrameLayout fl = new FullWidthFixedViewLayout(getContext());
+
+        if (lyp != null) {
+            v.setLayoutParams(new FrameLayout.LayoutParams(lyp.width, lyp.height));
+            fl.setLayoutParams(new AbsListView.LayoutParams(lyp.width, lyp.height));
+        }
+        fl.addView(v);
+        info.view = v;
+        info.viewContainer = fl;
+        info.data = data;
+        info.isSelectable = isSelectable;
+        mHeaderViewInfos.add(info);
+        // in the case of re-adding a header view, or adding one later on,
+        // we need to notify the observer
+        if (adapter != null) {
+            ((HeaderViewGridAdapter) adapter).notifyDataSetChanged();
+        }
+    }
+
+    public void addFooterView(View v) {
+        addFooterView(v, null, true);
+    }
+
+    public void addFooterView(View v, Object data, boolean isSelectable) {
+        ListAdapter mAdapter = getAdapter();
+        if (mAdapter != null && !(mAdapter instanceof HeaderViewGridAdapter)) {
+            throw new IllegalStateException(
+                    "Cannot add header view to grid -- setAdapter has already been called.");
+        }
+
+        ViewGroup.LayoutParams lyp = v.getLayoutParams();
+
+        FixedViewInfo info = new FixedViewInfo();
+        FrameLayout fl = new FullWidthFixedViewLayout(getContext());
+
+        if (lyp != null) {
+            v.setLayoutParams(new FrameLayout.LayoutParams(lyp.width, lyp.height));
+            fl.setLayoutParams(new AbsListView.LayoutParams(lyp.width, lyp.height));
+        }
+        fl.addView(v);
+        info.view = v;
+        info.viewContainer = fl;
+        info.data = data;
+        info.isSelectable = isSelectable;
+        mFooterViewInfos.add(info);
+
+        if (mAdapter != null) {
+            ((HeaderViewGridAdapter) mAdapter).notifyDataSetChanged();
+        }
+    }
+
+    public int getHeaderViewCount() {
+        return mHeaderViewInfos.size();
+    }
+
+    public int getFooterViewCount() {
+        return mFooterViewInfos.size();
+    }
+
+    /**
+     * Removes a previously-added header view.
+     *
+     * @param v The view to remove
+     * @return true if the view was removed, false if the view was not a header
+     * view
+     */
+    public boolean removeHeaderView(View v) {
+        if (mHeaderViewInfos.size() > 0) {
+            boolean result = false;
+            ListAdapter adapter = getAdapter();
+            if (adapter != null && ((HeaderViewGridAdapter) adapter).removeHeader(v)) {
+                result = true;
+            }
+            removeFixedViewInfo(v, mHeaderViewInfos);
+            return result;
+        }
+        return false;
+    }
+
+    /**
+     * Removes a previously-added footer view.
+     *
+     * @param v The view to remove
+     * @return true if the view was removed, false if the view was not a header
+     * view
+     */
+    public boolean removeFooterView(View v) {
+        if (mFooterViewInfos.size() > 0) {
+            boolean result = false;
+            ListAdapter adapter = getAdapter();
+            if (adapter != null && ((HeaderViewGridAdapter) adapter).removeFooter(v)) {
+                result = true;
+            }
+            removeFixedViewInfo(v, mFooterViewInfos);
+            return result;
+        }
+        return false;
+    }
+
+    private void removeFixedViewInfo(View v, ArrayList<FixedViewInfo> where) {
+        int len = where.size();
+        for (int i = 0; i < len; ++i) {
+            FixedViewInfo info = where.get(i);
+            if (info.view == v) {
+                where.remove(i);
+                break;
+            }
+        }
+    }
+
+    @TargetApi(11)
+    private int getNumColumnsCompatible() {
+        if (Build.VERSION.SDK_INT >= 11) {
+            return super.getNumColumns();
+        } else {
+            try {
+                Field numColumns = getClass().getSuperclass().getDeclaredField("mNumColumns");
+                numColumns.setAccessible(true);
+                return numColumns.getInt(this);
+            } catch (Exception e) {
+                if (mNumColumns != -1) {
+                    return mNumColumns;
+                }
+                throw new RuntimeException("Can not determine the mNumColumns for this API platform, please call setNumColumns to set it.");
+            }
+        }
+    }
+
+    @TargetApi(16)
+    private int getColumnWidthCompatible() {
+        if (Build.VERSION.SDK_INT >= 16) {
+            return super.getColumnWidth();
+        } else {
+            try {
+                Field numColumns = getClass().getSuperclass().getDeclaredField("mColumnWidth");
+                numColumns.setAccessible(true);
+                return numColumns.getInt(this);
+            } catch (NoSuchFieldException e) {
+                throw new RuntimeException(e);
+            } catch (IllegalAccessException e) {
+                throw new RuntimeException(e);
+            }
+        }
+    }
+
+    @Override
+    protected void onDetachedFromWindow() {
+        super.onDetachedFromWindow();
+        mViewForMeasureRowHeight = null;
+    }
+
+    public void invalidateRowHeight() {
+        mRowHeight = -1;
+    }
+
+    public int getRowHeight() {
+        if (mRowHeight > 0) {
+            return mRowHeight;
+        }
+        ListAdapter adapter = getAdapter();
+        int numColumns = getNumColumnsCompatible();
+
+        // adapter has not been set or has no views in it;
+        if (adapter == null || adapter.getCount() <= numColumns * (mHeaderViewInfos.size() + mFooterViewInfos.size())) {
+            return -1;
+        }
+        int mColumnWidth = getColumnWidthCompatible();
+        View view = getAdapter().getView(numColumns * mHeaderViewInfos.size(), mViewForMeasureRowHeight, this);
+        AbsListView.LayoutParams p = (AbsListView.LayoutParams) view.getLayoutParams();
+        if (p == null) {
+            p = new AbsListView.LayoutParams(-1, -2, 0);
+            view.setLayoutParams(p);
+        }
+        int childHeightSpec = getChildMeasureSpec(
+                MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), 0, p.height);
+        int childWidthSpec = getChildMeasureSpec(
+                MeasureSpec.makeMeasureSpec(mColumnWidth, MeasureSpec.EXACTLY), 0, p.width);
+        view.measure(childWidthSpec, childHeightSpec);
+        mViewForMeasureRowHeight = view;
+        mRowHeight = view.getMeasuredHeight();
+        return mRowHeight;
+    }
+
+    @TargetApi(11)
+    public void tryToScrollToBottomSmoothly() {
+        int lastPos = getAdapter().getCount() - 1;
+        if (Build.VERSION.SDK_INT >= 11) {
+            smoothScrollToPositionFromTop(lastPos, 0);
+        } else {
+            setSelection(lastPos);
+        }
+    }
+
+    @TargetApi(11)
+    public void tryToScrollToBottomSmoothly(int duration) {
+        int lastPos = getAdapter().getCount() - 1;
+        if (Build.VERSION.SDK_INT >= 11) {
+            smoothScrollToPositionFromTop(lastPos, 0, duration);
+        } else {
+            setSelection(lastPos);
+        }
+    }
+
+    @Override
+    public void setAdapter(ListAdapter adapter) {
+        if (mHeaderViewInfos.size() > 0 || mFooterViewInfos.size() > 0) {
+            HeaderViewGridAdapter headerViewGridAdapter = new HeaderViewGridAdapter(mHeaderViewInfos, mFooterViewInfos, adapter);
+            int numColumns = getNumColumnsCompatible();
+            if (numColumns > 1) {
+                headerViewGridAdapter.setNumColumns(numColumns);
+            }
+            headerViewGridAdapter.setRowHeight(getRowHeight());
+            super.setAdapter(headerViewGridAdapter);
+        } else {
+            super.setAdapter(adapter);
+        }
+    }
+
+    /**
+     * full width
+     */
+    private class FullWidthFixedViewLayout extends FrameLayout {
+
+        public FullWidthFixedViewLayout(Context context) {
+            super(context);
+        }
+
+        @Override
+        protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
+            int realLeft = GridViewWithHeaderAndFooter.this.getPaddingLeft() + getPaddingLeft();
+            // Try to make where it should be, from left, full width
+            if (realLeft != left) {
+                offsetLeftAndRight(realLeft - left);
+            }
+            super.onLayout(changed, left, top, right, bottom);
+        }
+
+        @Override
+        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+            int targetWidth = GridViewWithHeaderAndFooter.this.getMeasuredWidth()
+                    - GridViewWithHeaderAndFooter.this.getPaddingLeft()
+                    - GridViewWithHeaderAndFooter.this.getPaddingRight();
+            widthMeasureSpec = MeasureSpec.makeMeasureSpec(targetWidth,
+                    MeasureSpec.getMode(widthMeasureSpec));
+            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+        }
+    }
+
+    @Override
+    public void setNumColumns(int numColumns) {
+        super.setNumColumns(numColumns);
+        mNumColumns = numColumns;
+        ListAdapter adapter = getAdapter();
+        if (adapter != null && adapter instanceof HeaderViewGridAdapter) {
+            ((HeaderViewGridAdapter) adapter).setNumColumns(numColumns);
+        }
+    }
+
+    /**
+     * ListAdapter used when a HeaderGridView has header views. This ListAdapter
+     * wraps another one and also keeps track of the header views and their
+     * associated data objects.
+     * <p>This is intended as a base class; you will probably not need to
+     * use this class directly in your own code.
+     */
+    private static class HeaderViewGridAdapter implements WrapperListAdapter, Filterable {
+        // This is used to notify the container of updates relating to number of columns
+        // or headers changing, which changes the number of placeholders needed
+        private final DataSetObservable mDataSetObservable = new DataSetObservable();
+        private final ListAdapter mAdapter;
+        static final ArrayList<FixedViewInfo> EMPTY_INFO_LIST =
+                new ArrayList<FixedViewInfo>();
+
+        // This ArrayList is assumed to NOT be null.
+        ArrayList<FixedViewInfo> mHeaderViewInfos;
+        ArrayList<FixedViewInfo> mFooterViewInfos;
+        private int mNumColumns = 1;
+        private int mRowHeight = -1;
+        boolean mAreAllFixedViewsSelectable;
+        private final boolean mIsFilterable;
+        private boolean mCachePlaceHoldView = true;
+        // From Recycle Bin or calling getView, this a question...
+        private boolean mCacheFirstHeaderView = false;
+
+        public HeaderViewGridAdapter(ArrayList<FixedViewInfo> headerViewInfos, ArrayList<FixedViewInfo> footViewInfos, ListAdapter adapter) {
+            mAdapter = adapter;
+            mIsFilterable = adapter instanceof Filterable;
+            if (headerViewInfos == null) {
+                mHeaderViewInfos = EMPTY_INFO_LIST;
+            } else {
+                mHeaderViewInfos = headerViewInfos;
+            }
+
+            if (footViewInfos == null) {
+                mFooterViewInfos = EMPTY_INFO_LIST;
+            } else {
+                mFooterViewInfos = footViewInfos;
+            }
+            mAreAllFixedViewsSelectable = areAllListInfosSelectable(mHeaderViewInfos)
+                    && areAllListInfosSelectable(mFooterViewInfos);
+        }
+
+        public void setNumColumns(int numColumns) {
+            if (numColumns < 1) {
+                return;
+            }
+            if (mNumColumns != numColumns) {
+                mNumColumns = numColumns;
+                notifyDataSetChanged();
+            }
+        }
+
+        public void setRowHeight(int height) {
+            mRowHeight = height;
+        }
+
+        public int getHeadersCount() {
+            return mHeaderViewInfos.size();
+        }
+
+        public int getFootersCount() {
+            return mFooterViewInfos.size();
+        }
+
+        @Override
+        public boolean isEmpty() {
+            return (mAdapter == null || mAdapter.isEmpty()) && getHeadersCount() == 0 && getFootersCount() == 0;
+        }
+
+        private boolean areAllListInfosSelectable(ArrayList<FixedViewInfo> infos) {
+            if (infos != null) {
+                for (FixedViewInfo info : infos) {
+                    if (!info.isSelectable) {
+                        return false;
+                    }
+                }
+            }
+            return true;
+        }
+
+        public boolean removeHeader(View v) {
+            for (int i = 0; i < mHeaderViewInfos.size(); i++) {
+                FixedViewInfo info = mHeaderViewInfos.get(i);
+                if (info.view == v) {
+                    mHeaderViewInfos.remove(i);
+                    mAreAllFixedViewsSelectable =
+                            areAllListInfosSelectable(mHeaderViewInfos) && areAllListInfosSelectable(mFooterViewInfos);
+                    mDataSetObservable.notifyChanged();
+                    return true;
+                }
+            }
+            return false;
+        }
+
+        public boolean removeFooter(View v) {
+            for (int i = 0; i < mFooterViewInfos.size(); i++) {
+                FixedViewInfo info = mFooterViewInfos.get(i);
+                if (info.view == v) {
+                    mFooterViewInfos.remove(i);
+                    mAreAllFixedViewsSelectable =
+                            areAllListInfosSelectable(mHeaderViewInfos) && areAllListInfosSelectable(mFooterViewInfos);
+                    mDataSetObservable.notifyChanged();
+                    return true;
+                }
+            }
+            return false;
+        }
+
+        @Override
+        public int getCount() {
+            if (mAdapter != null) {
+                return (getFootersCount() + getHeadersCount()) * mNumColumns + getAdapterAndPlaceHolderCount();
+            } else {
+                return (getFootersCount() + getHeadersCount()) * mNumColumns;
+            }
+        }
+
+        @Override
+        public boolean areAllItemsEnabled() {
+            if (mAdapter != null) {
+                return mAreAllFixedViewsSelectable && mAdapter.areAllItemsEnabled();
+            } else {
+                return true;
+            }
+        }
+
+        private int getAdapterAndPlaceHolderCount() {
+            final int adapterCount = (int) (Math.ceil(1f * mAdapter.getCount() / mNumColumns) * mNumColumns);
+            return adapterCount;
+        }
+
+        @Override
+        public boolean isEnabled(int position) {
+            // Header (negative positions will throw an IndexOutOfBoundsException)
+            int numHeadersAndPlaceholders = getHeadersCount() * mNumColumns;
+            if (position < numHeadersAndPlaceholders) {
+                return position % mNumColumns == 0
+                        && mHeaderViewInfos.get(position / mNumColumns).isSelectable;
+            }
+
+            // Adapter
+            final int adjPosition = position - numHeadersAndPlaceholders;
+            int adapterCount = 0;
+            if (mAdapter != null) {
+                adapterCount = getAdapterAndPlaceHolderCount();
+                if (adjPosition < adapterCount) {
+                    return adjPosition < mAdapter.getCount() && mAdapter.isEnabled(adjPosition);
+                }
+            }
+
+            // Footer (off-limits positions will throw an IndexOutOfBoundsException)
+            final int footerPosition = adjPosition - adapterCount;
+            return footerPosition % mNumColumns == 0
+                    && mFooterViewInfos.get(footerPosition / mNumColumns).isSelectable;
+        }
+
+        @Override
+        public Object getItem(int position) {
+            // Header (negative positions will throw an ArrayIndexOutOfBoundsException)
+            int numHeadersAndPlaceholders = getHeadersCount() * mNumColumns;
+            if (position < numHeadersAndPlaceholders) {
+                if (position % mNumColumns == 0) {
+                    return mHeaderViewInfos.get(position / mNumColumns).data;
+                }
+                return null;
+            }
+
+            // Adapter
+            final int adjPosition = position - numHeadersAndPlaceholders;
+            int adapterCount = 0;
+            if (mAdapter != null) {
+                adapterCount = getAdapterAndPlaceHolderCount();
+                if (adjPosition < adapterCount) {
+                    if (adjPosition < mAdapter.getCount()) {
+                        return mAdapter.getItem(adjPosition);
+                    } else {
+                        return null;
+                    }
+                }
+            }
+
+            // Footer (off-limits positions will throw an IndexOutOfBoundsException)
+            final int footerPosition = adjPosition - adapterCount;
+            if (footerPosition % mNumColumns == 0) {
+                return mFooterViewInfos.get(footerPosition).data;
+            } else {
+                return null;
+            }
+        }
+
+        @Override
+        public long getItemId(int position) {
+            int numHeadersAndPlaceholders = getHeadersCount() * mNumColumns;
+            if (mAdapter != null && position >= numHeadersAndPlaceholders) {
+                int adjPosition = position - numHeadersAndPlaceholders;
+                int adapterCount = mAdapter.getCount();
+                if (adjPosition < adapterCount) {
+                    return mAdapter.getItemId(adjPosition);
+                }
+            }
+            return -1;
+        }
+
+        @Override
+        public boolean hasStableIds() {
+            if (mAdapter != null) {
+                return mAdapter.hasStableIds();
+            }
+            return false;
+        }
+
+        @Override
+        public View getView(int position, View convertView, ViewGroup parent) {
+            if (DEBUG) {
+                Log.d(LOG_TAG, String.format("getView: %s, reused: %s", position, convertView == null));
+            }
+            // Header (negative positions will throw an ArrayIndexOutOfBoundsException)
+            int numHeadersAndPlaceholders = getHeadersCount() * mNumColumns;
+            if (position < numHeadersAndPlaceholders) {
+                View headerViewContainer = mHeaderViewInfos
+                        .get(position / mNumColumns).viewContainer;
+                if (position % mNumColumns == 0) {
+                    return headerViewContainer;
+                } else {
+                    if (convertView == null) {
+                        convertView = new View(parent.getContext());
+                    }
+                    // We need to do this because GridView uses the height of the last item
+                    // in a row to determine the height for the entire row.
+                    convertView.setVisibility(View.INVISIBLE);
+                    convertView.setMinimumHeight(headerViewContainer.getHeight());
+                    return convertView;
+                }
+            }
+            // Adapter
+            final int adjPosition = position - numHeadersAndPlaceholders;
+            int adapterCount = 0;
+            if (mAdapter != null) {
+                adapterCount = getAdapterAndPlaceHolderCount();
+                if (adjPosition < adapterCount) {
+                    if (adjPosition < mAdapter.getCount()) {
+                        View view = mAdapter.getView(adjPosition, convertView, parent);
+                        return view;
+                    } else {
+                        if (convertView == null) {
+                            convertView = new View(parent.getContext());
+                        }
+                        convertView.setVisibility(View.INVISIBLE);
+                        convertView.setMinimumHeight(mRowHeight);
+                        return convertView;
+                    }
+                }
+            }
+            // Footer
+            final int footerPosition = adjPosition - adapterCount;
+            if (footerPosition < getCount()) {
+                View footViewContainer = mFooterViewInfos
+                        .get(footerPosition / mNumColumns).viewContainer;
+                if (position % mNumColumns == 0) {
+                    return footViewContainer;
+                } else {
+                    if (convertView == null) {
+                        convertView = new View(parent.getContext());
+                    }
+                    // We need to do this because GridView uses the height of the last item
+                    // in a row to determine the height for the entire row.
+                    convertView.setVisibility(View.INVISIBLE);
+                    convertView.setMinimumHeight(footViewContainer.getHeight());
+                    return convertView;
+                }
+            }
+            throw new ArrayIndexOutOfBoundsException(position);
+        }
+
+        @Override
+        public int getItemViewType(int position) {
+
+            final int numHeadersAndPlaceholders = getHeadersCount() * mNumColumns;
+            final int adapterViewTypeStart = mAdapter == null ? 0 : mAdapter.getViewTypeCount() - 1;
+            int type = AdapterView.ITEM_VIEW_TYPE_HEADER_OR_FOOTER;
+            if (mCachePlaceHoldView) {
+                // Header
+                if (position < numHeadersAndPlaceholders) {
+                    if (position == 0) {
+                        if (mCacheFirstHeaderView) {
+                            type = adapterViewTypeStart + mHeaderViewInfos.size() + mFooterViewInfos.size() + 1 + 1;
+                        }
+                    }
+                    if (position % mNumColumns != 0) {
+                        type = adapterViewTypeStart + (position / mNumColumns + 1);
+                    }
+                }
+            }
+
+            // Adapter
+            final int adjPosition = position - numHeadersAndPlaceholders;
+            int adapterCount = 0;
+            if (mAdapter != null) {
+                adapterCount = getAdapterAndPlaceHolderCount();
+                if (adjPosition >= 0 && adjPosition < adapterCount) {
+                    if (adjPosition < mAdapter.getCount()) {
+                        type = mAdapter.getItemViewType(adjPosition);
+                    } else {
+                        if (mCachePlaceHoldView) {
+                            type = adapterViewTypeStart + mHeaderViewInfos.size() + 1;
+                        }
+                    }
+                }
+            }
+
+            if (mCachePlaceHoldView) {
+                // Footer
+                final int footerPosition = adjPosition - adapterCount;
+                if (footerPosition >= 0 && footerPosition < getCount() && (footerPosition % mNumColumns) != 0) {
+                    type = adapterViewTypeStart + mHeaderViewInfos.size() + 1 + (footerPosition / mNumColumns + 1);
+                }
+            }
+            if (DEBUG) {
+                Log.d(LOG_TAG, String.format("getItemViewType: pos: %s, result: %s", position, type, mCachePlaceHoldView, mCacheFirstHeaderView));
+            }
+            return type;
+        }
+
+        /**
+         * content view, content view holder, header[0], header and footer placeholder(s)
+         *
+         * @return
+         */
+        @Override
+        public int getViewTypeCount() {
+            int count = mAdapter == null ? 1 : mAdapter.getViewTypeCount();
+            if (mCachePlaceHoldView) {
+                int offset = mHeaderViewInfos.size() + 1 + mFooterViewInfos.size();
+                if (mCacheFirstHeaderView) {
+                    offset += 1;
+                }
+                count += offset;
+            }
+            if (DEBUG) {
+                Log.d(LOG_TAG, String.format("getViewTypeCount: %s", count));
+            }
+            return count;
+        }
+
+        @Override
+        public void registerDataSetObserver(DataSetObserver observer) {
+            mDataSetObservable.registerObserver(observer);
+            if (mAdapter != null) {
+                mAdapter.registerDataSetObserver(observer);
+            }
+        }
+
+        @Override
+        public void unregisterDataSetObserver(DataSetObserver observer) {
+            mDataSetObservable.unregisterObserver(observer);
+            if (mAdapter != null) {
+                mAdapter.unregisterDataSetObserver(observer);
+            }
+        }
+
+        @Override
+        public Filter getFilter() {
+            if (mIsFilterable) {
+                return ((Filterable) mAdapter).getFilter();
+            }
+            return null;
+        }
+
+        @Override
+        public ListAdapter getWrappedAdapter() {
+            return mAdapter;
+        }
+
+        public void notifyDataSetChanged() {
+            mDataSetObservable.notifyChanged();
+        }
+    }
+}

src/third_parties/liaohuqiu/lapache-2.0.txt

@@ -0,0 +1,201 @@
+  Apache License
+                           Version 2.0, January 2004
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+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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