Dynamically show/hide headers without changing the adapter

library/src/se/emilsjolander/stickylistheaders/AdapterWrapper.java

@@ -163,18 +163,21 @@ public WrapperView getView(int position, View convertView, ViewGroup parent) {
 		WrapperView wv = (convertView == null) ? new WrapperView(mContext) : (WrapperView) convertView;
 		View item = mDelegate.getView(position, wv.mItem, parent);
 		View header = null;
-		if (previousPositionHasSameHeader(position)) {
-			recycleHeaderIfExists(wv);
-		} else {
-			header = configureHeader(wv, position);
-		}
-		if((item instanceof Checkable) && !(wv instanceof CheckableWrapperView)) {
-			// Need to create Checkable subclass of WrapperView for ListView to work correctly
-			wv = new CheckableWrapperView(mContext);
-		} else if(!(item instanceof Checkable) && (wv instanceof CheckableWrapperView)) {
-			wv = new WrapperView(mContext);
+		if (mDelegate.shouldShowHeaders()) {
+			if (previousPositionHasSameHeader(position)) {
+				recycleHeaderIfExists(wv);
+			} else {
+				header = configureHeader(wv, position);
+			}
+			if((item instanceof Checkable) && !(wv instanceof CheckableWrapperView)) {
+				// Need to create Checkable subclass of WrapperView for ListView to work correctly
+				wv = new CheckableWrapperView(mContext);
+			} else if(!(item instanceof Checkable) && (wv instanceof CheckableWrapperView)) {
+				wv = new WrapperView(mContext);
+			}
 		}
 		wv.update(item, header, mDivider, mDividerHeight);
+
 		return wv;
 	}
 
@@ -222,4 +225,9 @@ public long getHeaderId(int position) {
 		return mDelegate.getHeaderId(position);
 	}
 
+	@Override
+	public boolean shouldShowHeaders() {
+		return mDelegate.shouldShowHeaders();
+	}
+
 }

library/src/se/emilsjolander/stickylistheaders/ExpandableStickyListHeadersAdapter.java

@@ -33,6 +33,11 @@ public long getHeaderId(int position) {
         return mInnerAdapter.getHeaderId(position);
     }
 
+    @Override
+    public boolean shouldShowHeaders() {
+        return mInnerAdapter.shouldShowHeaders();
+    }
+
     @Override
     public boolean areAllItemsEnabled() {
         return mInnerAdapter.areAllItemsEnabled();

library/src/se/emilsjolander/stickylistheaders/StickyListHeadersAdapter.java

@@ -35,4 +35,12 @@ public interface StickyListHeadersAdapter extends ListAdapter {
 	 * The id of the header at the specified position.
 	 */
 	long getHeaderId(int position);
+
+	/**
+	 * Check whether or not the adapter should display header views.
+	 * 
+	 * @return
+	 * If false, no headers will be displayed.
+	 */
+	boolean shouldShowHeaders();
 }

library/src/se/emilsjolander/stickylistheaders/StickyListHeadersListView.java

@@ -509,7 +509,10 @@ public void onScroll(AbsListView view, int firstVisibleItem,
                 mOnScrollListenerDelegate.onScroll(view, firstVisibleItem,
                         visibleItemCount, totalItemCount);
             }
-            updateOrClearHeader(mList.getFixedFirstVisibleItem());
+
+            if (mAdapter != null && mAdapter.shouldShowHeaders()) {
+                updateOrClearHeader(mList.getFixedFirstVisibleItem());
+            }
         }
 
         @Override