/**
* Gets the item view type at the specified position
*
* @param position
* @return An integer representing the type
*/
@Override
public int getItemViewType(int position) {
NavigationDrawerItem item = this.getItem(position);
if (item.isHeader()) {
return 0;
} else {
return 1;
}
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = null;
NavigationDrawerItem menuItem = this.getItem(position);
if (menuItem.getType() == NavigationDrawerGroupElement.ITEM_TYPE) {
view = getGroupElementView(convertView, parent, menuItem);
} else {
view = getGroupNameView(convertView, parent, menuItem);
}
return view;
}
private View getGroupNameView(View convertView, ViewGroup parent, NavigationDrawerItem menuItem) {
if (convertView == null) {
convertView = View.inflate(ctx, R.layout.drawer_list_group_name, null);
}
TextView tv_drawer_list_item =
(TextView) convertView.findViewById(R.id.tv_drawer_list_group_name);
tv_drawer_list_item.setText(menuItem.getLabel());
return convertView;
}
/**
* Gets and inflates the View at the specified position
*
* <p>Depending on if the item is a normal item or a header, it will set the contained Views
* accordingly
*
* <p>This method also checks to see if a View of the same type was already shown before so it can
* reuse the View
*
* @param position
* @param convertView
* @param parent
*/
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// Get the drawer item
NavigationDrawerItem item = this.getItem(position);
// Check if the item is a header
if (item.isHeader()) {
// Cast to the header type
HeaderDrawerItem headerItem = (HeaderDrawerItem) item;
// See if the view is being reused
HeaderViewHolder viewHolder;
if (convertView == null) {
// The view has not been shown yet, so find the necessary views and store them in a
// ViewHolder
viewHolder = new HeaderViewHolder();
// Inflate the layout
LayoutInflater inflater = LayoutInflater.from(this.mContext);
convertView = inflater.inflate(R.layout.navigation_drawer_header_item, parent, false);
// Store the views
viewHolder.textView = (TextView) convertView.findViewById(R.id.navigation_drawer_item_text);
viewHolder.position = position;
convertView.setTag(viewHolder);
} else {
// The view has already been shown, so reuse it
viewHolder = (HeaderViewHolder) convertView.getTag();
}
// Set the text
viewHolder.textView.setText(headerItem.getText());
return convertView;
} else {
// Cast to the normal type
NormalDrawerItem normalItem = (NormalDrawerItem) item;
// See if the view is being reused
NormalViewHolder viewHolder;
if (convertView == null) {
// The view has not been shown yet, so find the necessary views and store them in a
// ViewHolder
viewHolder = new NormalViewHolder();
// Inflate the layout
LayoutInflater inflater = LayoutInflater.from(this.mContext);
convertView = inflater.inflate(R.layout.navigation_drawer_normal_item, parent, false);
// Store the views
viewHolder.imageView =
(ImageView) convertView.findViewById(R.id.navigation_drawer_item_icon);
viewHolder.textView = (TextView) convertView.findViewById(R.id.navigation_drawer_item_text);
viewHolder.position = position;
convertView.setTag(viewHolder);
} else {
// The view has already been shown, so reuse it
viewHolder = (NormalViewHolder) convertView.getTag();
}
// Set the icon and the text
viewHolder.imageView.setImageDrawable(normalItem.getDrawable());
viewHolder.textView.setText(normalItem.getText());
return convertView;
}
}
/**
* Determines if the item at the specified position is enabled
*
* <p>Headers are not enabled
*
* @param position
* @return Whether or not the item is enabled
*/
@Override
public boolean isEnabled(int position) {
NavigationDrawerItem item = this.getItem(position);
return !item.isHeader();
}
