ListView: implement header and footer Views

Underlying HeaderViewListAdapter class is copied from AOSP

src/api-impl/android/widget/ListView.java

@@ -1,5 +1,6 @@
 package android.widget;
 
+import java.util.ArrayList;
 import android.content.Context;
 import android.graphics.drawable.Drawable;
 import android.util.AttributeSet;
@@ -7,6 +8,21 @@ import android.view.View;
 
 public class ListView extends AbsListView {
 
+	static class FixedViewInfo {
+		public View view;
+		public Object data;
+		public boolean isSelectable;
+
+		public FixedViewInfo(View view, Object data, boolean isSelectable) {
+			this.view = view;
+			this.data = data;
+			this.isSelectable = isSelectable;
+		}
+	}
+
+	private ArrayList<FixedViewInfo> headerViews = new ArrayList<FixedViewInfo>();
+	private ArrayList<FixedViewInfo> footerViews = new ArrayList<FixedViewInfo>();
+
 	public ListView(Context context) {
 		super(context);
 	}
@@ -15,35 +31,72 @@ public class ListView extends AbsListView {
 		super(context, attributeSet);
 	}
 
+	public ListView(Context context, AttributeSet attributeSet, int defStyleAttr) {
+		super(context, attributeSet, defStyleAttr);
+	}
+
+	@Override
+	public void setAdapter(ListAdapter adapter) {
+		if (getHeaderViewsCount() > 0 || getFooterViewsCount() > 0) {
+			adapter = new HeaderViewListAdapter(headerViews, footerViews, adapter);
+		}
+		super.setAdapter(adapter);
+	}
+
 	public int getDividerHeight() {return 0;}
 
 	public Drawable getDivider() {return null;}
 
 	public void setTextFilterEnabled(boolean enabled) {}
 
-	public void addHeaderView(View v, Object data, boolean isSelectable) {}
+	public void addHeaderView(View v, Object data, boolean isSelectable) {
+		headerViews.add(new FixedViewInfo(v, data, isSelectable));
+		if (getAdapter() instanceof HeaderViewListAdapter) {
+			observer.onChanged();
+		} else if (getAdapter() != null) {
+			setAdapter(getAdapter());
+		}
+	}
 
 	public void setDrawSelectorOnTop(boolean dummy) {}
 
-	public void addHeaderView(View view) {}
+	public void addHeaderView(View view) {
+		addHeaderView(view, null, true);
+	}
 
-	public boolean removeHeaderView(View view) { return true; }
+	public boolean removeHeaderView(View view) {
+		boolean result = false;
+		if (getAdapter() instanceof HeaderViewListAdapter)
+			result = ((HeaderViewListAdapter)getAdapter()).removeHeader(view);
+		if (result)
+			observer.onChanged();
+		return result;
+	}
 
 	public int getHeaderViewsCount() {
-		return 0;
+		return headerViews.size();
 	}
 
 	public int getFooterViewsCount() {
-		return 0;
+		return footerViews.size();
 	}
 
 	public void setDivider(Drawable drawable) {}
 
 	public void setSelectionFromTop(int position, int y) {}
 
-	public void addFooterView(View v, Object data, boolean isSelectable) {}
+	public void addFooterView(View v, Object data, boolean isSelectable) {
+		footerViews.add(new FixedViewInfo(v, data, isSelectable));
+		if (getAdapter() instanceof HeaderViewListAdapter) {
+			observer.onChanged();
+		} else if (getAdapter() != null) {
+			setAdapter(getAdapter());
+		}
+	}
 
-	public void addFooterView(View v) {}
+	public void addFooterView(View v) {
+		addFooterView(v, null, true);
+	}
 
 	public void setDividerHeight(int height) {}
 }