Allow adding headers and footers to ListView after setAdapter(). (72e2f2a9) · Commits · e / os / android_frameworks_base

core/java/android/widget/ListView.java

+53 −38

Original line number	Original line	Diff line number	Diff line
	@@ -240,46 +240,53 @@ public class ListView extends AbsListView {
	}		}

	/**		/**
	* Add a fixed view to appear at the top of the list. If addHeaderView is		* Add a fixed view to appear at the top of the list. If this method is
	* called more than once, the views will appear in the order they were		* 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.		* added. Views added using this call can take focus if they want.
	* <p>		* <p>
	* NOTE: Call this before calling setAdapter. This is so ListView can wrap		* Note: When first introduced, this method could only be called before
	* the supplied cursor with one that will also account for header and footer		* setting the adapter with {@link #setAdapter(ListAdapter)}. Starting with
	* views.		* {@link android.os.Build.VERSION_CODES#KEY_LIME_PIE}, this method may be
			* called at any time. If the ListView's adapter does not extend
			* {@link HeaderViewListAdapter}, it will be wrapped with a supporting
			* instance of {@link WrapperListAdapter}.
	*		*
	* @param v The view to add.		* @param v The view to add.
	* @param data Data to associate with this view		* @param data Data to associate with this view
	* @param isSelectable whether the item is selectable		* @param isSelectable whether the item is selectable
	*/		*/
	public void addHeaderView(View v, Object data, boolean isSelectable) {		public void addHeaderView(View v, Object data, boolean isSelectable) {
			final FixedViewInfo info = new FixedViewInfo();
	if (mAdapter != null && ! (mAdapter instanceof HeaderViewListAdapter)) {
	throw new IllegalStateException(
	"Cannot add header view to list -- setAdapter has already been called.");
	}

	FixedViewInfo info = new FixedViewInfo();
	info.view = v;		info.view = v;
	info.data = data;		info.data = data;
	info.isSelectable = isSelectable;		info.isSelectable = isSelectable;
	mHeaderViewInfos.add(info);		mHeaderViewInfos.add(info);

	// in the case of re-adding a header view, or adding one later on,		// Wrap the adapter if it wasn't already wrapped.
	// we need to notify the observer		if (mAdapter != null) {
	if (mAdapter != null && mDataSetObserver != null) {		if (!(mAdapter instanceof HeaderViewListAdapter)) {
			mAdapter = new HeaderViewListAdapter(mHeaderViewInfos, mFooterViewInfos, mAdapter);
			}

			// In the case of re-adding a header view, or adding one later on,
			// we need to notify the observer.
			if (mDataSetObserver != null) {
	mDataSetObserver.onChanged();		mDataSetObserver.onChanged();
	}		}
	}		}
			}

	/**		/**
	* Add a fixed view to appear at the top of the list. If addHeaderView is		* Add a fixed view to appear at the top of the list. If addHeaderView is
	* called more than once, the views will appear in the order they were		* 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.		* added. Views added using this call can take focus if they want.
	* <p>		* <p>
	* NOTE: Call this before calling setAdapter. This is so ListView can wrap		* Note: When first introduced, this method could only be called before
	* the supplied cursor with one that will also account for header and footer		* setting the adapter with {@link #setAdapter(ListAdapter)}. Starting with
	* views.		* {@link android.os.Build.VERSION_CODES#KEY_LIME_PIE}, this method may be
			* called at any time. If the ListView's adapter does not extend
			* {@link HeaderViewListAdapter}, it will be wrapped with a supporting
			* instance of {@link WrapperListAdapter}.
	*		*
	* @param v The view to add.		* @param v The view to add.
	*/		*/
	@@ -330,41 +337,49 @@ public class ListView extends AbsListView {
	* called more than once, the views will appear in the order they were		* 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.		* added. Views added using this call can take focus if they want.
	* <p>		* <p>
	* NOTE: Call this before calling setAdapter. This is so ListView can wrap		* Note: When first introduced, this method could only be called before
	* the supplied cursor with one that will also account for header and footer		* setting the adapter with {@link #setAdapter(ListAdapter)}. Starting with
	* views.		* {@link android.os.Build.VERSION_CODES#KEY_LIME_PIE}, this method may be
			* called at any time. If the ListView's adapter does not extend
			* {@link HeaderViewListAdapter}, it will be wrapped with a supporting
			* instance of {@link WrapperListAdapter}.
	*		*
	* @param v The view to add.		* @param v The view to add.
	* @param data Data to associate with this view		* @param data Data to associate with this view
	* @param isSelectable true if the footer view can be selected		* @param isSelectable true if the footer view can be selected
	*/		*/
	public void addFooterView(View v, Object data, boolean isSelectable) {		public void addFooterView(View v, Object data, boolean isSelectable) {
			final FixedViewInfo info = new FixedViewInfo();
	// NOTE: do not enforce the adapter being null here, since unlike in
	// addHeaderView, it was never enforced here, and so existing apps are
	// relying on being able to add a footer and then calling setAdapter to
	// force creation of the HeaderViewListAdapter wrapper

	FixedViewInfo info = new FixedViewInfo();
	info.view = v;		info.view = v;
	info.data = data;		info.data = data;
	info.isSelectable = isSelectable;		info.isSelectable = isSelectable;
	mFooterViewInfos.add(info);		mFooterViewInfos.add(info);

	// in the case of re-adding a footer view, or adding one later on,		// Wrap the adapter if it wasn't already wrapped.
	// we need to notify the observer		if (mAdapter != null) {
	if (mAdapter != null && mDataSetObserver != null) {		if (!(mAdapter instanceof HeaderViewListAdapter)) {
			mAdapter = new HeaderViewListAdapter(mHeaderViewInfos, mFooterViewInfos, mAdapter);
			}

			// In the case of re-adding a footer view, or adding one later on,
			// we need to notify the observer.
			if (mDataSetObserver != null) {
	mDataSetObserver.onChanged();		mDataSetObserver.onChanged();
	}		}
	}		}
			}

	/**		/**
	* Add a fixed view to appear at the bottom of the list. If addFooterView is called more		* Add a fixed view to appear at the bottom of the list. If addFooterView is
	* than once, the views will appear in the order they were added. Views added using		* called more than once, the views will appear in the order they were
	* this call can take focus if they want.		* added. Views added using this call can take focus if they want.
	* <p>NOTE: Call this before calling setAdapter. This is so ListView can wrap the supplied		* <p>
	* cursor with one that will also account for header and footer views.		* Note: When first introduced, this method could only be called before
	*		* setting the adapter with {@link #setAdapter(ListAdapter)}. Starting with
			* {@link android.os.Build.VERSION_CODES#KEY_LIME_PIE}, this method may be
			* called at any time. If the ListView's adapter does not extend
			* {@link HeaderViewListAdapter}, it will be wrapped with a supporting
			* instance of {@link WrapperListAdapter}.
	*		*
	* @param v The view to add.		* @param v The view to add.
	*/		*/