package com.wpc.library.widget;
|
|
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.AdapterView;
|
import android.widget.Filter;
|
import android.widget.Filterable;
|
import android.widget.FrameLayout;
|
import android.widget.GridView;
|
import android.widget.ListAdapter;
|
import android.widget.WrapperListAdapter;
|
|
import java.lang.reflect.Field;
|
import java.util.ArrayList;
|
|
/**
|
* Created by weikou2015 on 2017/2/21.
|
*/
|
|
public class HeaderAndFooterGridView extends GridView {
|
|
public static boolean DEBUG = false;
|
private OnItemClickListener mOnItemClickListener;
|
private OnItemLongClickListener mOnItemLongClickListener;
|
|
/**
|
* 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;
|
/**
|
* 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;
|
//log tag can be at most 23 characters
|
private static final String LOG_TAG = "GridViewHeaderAndFooter";
|
|
private ArrayList<FixedViewInfo> mHeaderViewInfos = new ArrayList<FixedViewInfo>();
|
private ArrayList<FixedViewInfo> mFooterViewInfos = new ArrayList<FixedViewInfo>();
|
private ListAdapter mOriginalAdapter;
|
private ItemClickHandler mItemClickHandler;
|
|
private void initHeaderGridView() {
|
}
|
|
public HeaderAndFooterGridView(Context context) {
|
super(context);
|
initHeaderGridView();
|
}
|
|
public HeaderAndFooterGridView(Context context, AttributeSet attrs) {
|
super(context, attrs);
|
initHeaderGridView();
|
}
|
|
public HeaderAndFooterGridView(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.");
|
}
|
|
|
FixedViewInfo info = new FixedViewInfo();
|
info.view = v;
|
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.");
|
}
|
|
|
FixedViewInfo info = new FixedViewInfo();
|
info.view = v;
|
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.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 = GridView.class.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 = Build.VERSION.SDK_INT;
|
if (currentapiVersion < Build.VERSION_CODES.JELLY_BEAN) {
|
Field field = GridView.class.getDeclaredField("mVerticalSpacing");
|
field.setAccessible(true);
|
value = field.getInt(this);
|
} else {
|
value = super.getVerticalSpacing();
|
}
|
|
} catch (Exception ignore) {
|
}
|
|
return value;
|
}
|
|
@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
|
public int getHorizontalSpacing() {
|
int value = 0;
|
|
try {
|
int currentapiVersion = Build.VERSION.SDK_INT;
|
if (currentapiVersion < Build.VERSION_CODES.JELLY_BEAN) {
|
Field field = GridView.class.getDeclaredField("mHorizontalSpacing");
|
field.setAccessible(true);
|
value = field.getInt(this);
|
} else {
|
value = super.getHorizontalSpacing();
|
}
|
|
} catch (Exception ignore) {
|
}
|
|
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())) {
|
return -1;
|
}
|
int mColumnWidth = getColumnWidthCompatible();
|
View view = getAdapter().getView(numColumns * mHeaderViewInfos.size(), mViewForMeasureRowHeight, this);
|
LayoutParams p = (LayoutParams) view.getLayoutParams();
|
if (p == null) {
|
p = new 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) {
|
mOriginalAdapter = 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);
|
}
|
}
|
|
/**
|
* Return original adapter for convenience.
|
*
|
* @return
|
*/
|
public ListAdapter getOriginalAdapter() {
|
return mOriginalAdapter;
|
}
|
|
/**
|
* 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 = HeaderAndFooterGridView.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 = HeaderAndFooterGridView.this.getMeasuredWidth()
|
- HeaderAndFooterGridView.this.getPaddingLeft()
|
- HeaderAndFooterGridView.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();
|
}
|
|
/**
|
* @return true if this adapter doesn't contain any data. This is used to determine
|
* whether the empty view should be displayed. A typical implementation will return
|
* getCount() == 0 but since getCount() includes the headers and footers, specialized
|
* adapters might want a different behavior.
|
*/
|
@Override
|
public boolean isEmpty() {
|
return (mAdapter == null || mAdapter.isEmpty());
|
}
|
|
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() {
|
return mAdapter == null || mAreAllFixedViewsSelectable && mAdapter.areAllItemsEnabled();
|
}
|
|
private int getAdapterAndPlaceHolderCount() {
|
return (int) (Math.ceil(1f * mAdapter.getCount() / mNumColumns) * mNumColumns);
|
}
|
|
@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() {
|
return mAdapter != null && mAdapter.hasStableIds();
|
}
|
|
@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).view;
|
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()) {
|
return mAdapter.getView(adjPosition, convertView, parent);
|
} 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).view;
|
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();
|
}
|
}
|
|
@Override
|
public void setOnItemClickListener(OnItemClickListener l) {
|
mOnItemClickListener = l;
|
super.setOnItemClickListener(getItemClickHandler());
|
}
|
|
@Override
|
public void setOnItemLongClickListener(OnItemLongClickListener listener) {
|
mOnItemLongClickListener = listener;
|
super.setOnItemLongClickListener(getItemClickHandler());
|
}
|
|
private ItemClickHandler getItemClickHandler() {
|
if (mItemClickHandler == null) {
|
mItemClickHandler = new ItemClickHandler();
|
}
|
return mItemClickHandler;
|
}
|
|
private class ItemClickHandler implements OnItemClickListener, OnItemLongClickListener {
|
|
@Override
|
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
|
if (mOnItemClickListener != null) {
|
int resPos = position - getHeaderViewCount() * getNumColumnsCompatible();
|
if (resPos >= 0) {
|
mOnItemClickListener.onItemClick(parent, view, resPos, id);
|
}
|
}
|
}
|
|
@Override
|
public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
|
if (mOnItemLongClickListener != null) {
|
int resPos = position - getHeaderViewCount() * getNumColumnsCompatible();
|
if (resPos >= 0) {
|
mOnItemLongClickListener.onItemLongClick(parent, view, resPos, id);
|
}
|
}
|
return true;
|
}
|
}
|
}
|
