diff options
Diffstat (limited to 'app/src/main/java/github/daneren2005/dsub/view/HeaderGridView.java')
| -rw-r--r-- | app/src/main/java/github/daneren2005/dsub/view/HeaderGridView.java | 836 |
1 files changed, 836 insertions, 0 deletions
diff --git a/app/src/main/java/github/daneren2005/dsub/view/HeaderGridView.java b/app/src/main/java/github/daneren2005/dsub/view/HeaderGridView.java new file mode 100644 index 00000000..8a82f353 --- /dev/null +++ b/app/src/main/java/github/daneren2005/dsub/view/HeaderGridView.java @@ -0,0 +1,836 @@ +/* + * 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 github.daneren2005.dsub.view; + +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 HeaderGridView#addHeaderView(View, Object, boolean)} + * See {@link HeaderGridView#addFooterView(View, Object, boolean)} + */ +public class HeaderGridView extends GridView { + private static final String TAG = HeaderGridView.class.getSimpleName(); + 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 = HeaderGridView.class.getSimpleName(); + + private ArrayList<FixedViewInfo> mHeaderViewInfos = new ArrayList<FixedViewInfo>(); + private ArrayList<FixedViewInfo> mFooterViewInfos = new ArrayList<FixedViewInfo>(); + + private void initHeaderGridView() { + } + + public HeaderGridView(Context context) { + super(context); + initHeaderGridView(); + } + + public HeaderGridView(Context context, AttributeSet attrs) { + super(context, attrs); + initHeaderGridView(); + } + + public HeaderGridView(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 = GridView.class.getSuperclass().getDeclaredField("mNumColumns"); + numColumns.setAccessible(true); + return numColumns.getInt(this); + } catch (Exception e) { + if (mNumColumns != -1) { + return mNumColumns; + } else { + return 2; + } + } + } + } + + @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 getHeaderHeight(int row) { + if (row >= 0) { + return mHeaderViewInfos.get(row).view.getMeasuredHeight(); + } + + return 0; + } + + @TargetApi(Build.VERSION_CODES.JELLY_BEAN) + public int getVerticalSpacing(){ + int value = 0; + + try { + int currentapiVersion = android.os.Build.VERSION.SDK_INT; + if (currentapiVersion < Build.VERSION_CODES.JELLY_BEAN){ + Field field = this.getClass().getSuperclass().getDeclaredField("mVerticalSpacing"); + field.setAccessible(true); + value = field.getInt(this); + } else{ + value = super.getVerticalSpacing(); + } + + }catch (Exception ex){ + + } + + return value; + } + + @TargetApi(Build.VERSION_CODES.JELLY_BEAN) + public int getHorizontalSpacing(){ + int value = 0; + + try { + int currentapiVersion = android.os.Build.VERSION.SDK_INT; + if (currentapiVersion < Build.VERSION_CODES.JELLY_BEAN){ + Field field = this.getClass().getSuperclass().getDeclaredField("mHorizontalSpacing"); + field.setAccessible(true); + value = field.getInt(this); + } else{ + value = super.getHorizontalSpacing(); + } + + }catch (Exception ex){ + + } + + return value; + } + + 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()) || numColumns == -1) { + 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 = HeaderGridView.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 = HeaderGridView.this.getMeasuredWidth() + - HeaderGridView.this.getPaddingLeft() + - HeaderGridView.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 extends BaseAdapter 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(); + } + } +} |