このコードはプロトタイプの一部として書かれているので、あまりきれいでも滑らかでもないことに注意してください:) しかし、正しい方向に進むはずです。また、InventoryListItem は、上記のプロパティを含む SectionedListItem クラスを拡張することにも注意してください。
/* -------------------------
* Class: InventoryAdapter
* ------------------------- */
private final class InventoryAdapter extends ArrayAdapter<InventoryListItem> implements Filterable {
/* -------------------------
* Fields
* ------------------------- */
private ArrayList<InventoryListItem> items;
private ArrayList<InventoryListItem> staticItems;
private int resource;
private InventoryFilter filter = null;
/* -------------------------
* Constructor
* ------------------------- */
public InventoryAdapter(Context context, int textViewResourceId, ArrayList<InventoryListItem> objects) {
super(context, textViewResourceId, objects);
items = objects;
resource = textViewResourceId;
staticItems = items;
}
/* -------------------------
* Private Methods
* ------------------------- */
private void addCategorySpan(SpannableString span, int startIndex, int endIndex, final String category) {
span.setSpan(new ClickableSpan() {
@Override
public void onClick(View widget) {
String categoryFilter = "cat://" + category;
filterList(categoryFilter, true);
}
}, startIndex, endIndex, SpannableString.SPAN_EXCLUSIVE_EXCLUSIVE);
}
/* -------------------------
* Public Methods
* ------------------------- */
// Properties
@Override
public int getCount() {
return items.size();
}
@Override
public InventoryListItem getItem(int position) {
return items.get(position);
}
@Override
public int getPosition(InventoryListItem item) {
return items.indexOf(item);
}
@Override
public long getItemId(int position) {
return items.get(position).id;
}
@Override
public boolean isEnabled(int position) {
return true;
}
// Methods
public Filter getFilter() {
if ( filter == null ) {
filter = new InventoryFilter();
}
return filter;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater)getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View v = null;
InventoryListItem item = items.get(position);
if ( item.startNewSection ) {
v = inflater.inflate(R.layout.sectioned_list_header, null);
TextView sectionText = (TextView)v.findViewById(R.id.list_header_title);
sectionText.setText(item.sectionName);
} else {
v = inflater.inflate(resource, null);
TextView nameText = (TextView)v.findViewById(R.id.inventory_list_item_name_text);
TextView qtyText = (TextView)v.findViewById(R.id.inventory_list_item_qty_text);
TextView brandText = (TextView)v.findViewById(R.id.inventory_list_item_brand_text);
final TextView categoryText = (TextView)v.findViewById(R.id.inventory_list_item_category_text);
nameText.setText(item.name);
String qty = Float.toString(item.remainingAmount) + " " + item.measurementAbbv;
qtyText.setText(qty);
brandText.setText(item.brand);
// Create our list of categories and patterns
String categories = "";
for ( int i = 0; i <= item.categories.size() - 1; i++ ) {
if ( categories.length() == 0 ) {
categories = item.categories.get(i);
} else {
categories += ", " + item.categories.get(i);
}
}
categoryText.setMovementMethod(LinkMovementMethod.getInstance());
categoryText.setText(categories, BufferType.SPANNABLE);
// Now creat our spannable text
SpannableString span = (SpannableString)categoryText.getText();
// Create our links and set our text
int startIndex = 0;
boolean stillLooking = true;
while ( stillLooking ) {
int commaIndex = categories.indexOf(", ", startIndex);
if ( commaIndex >= 0 ) {
final String spanText = categoryText.getText().toString().substring(startIndex, commaIndex);
addCategorySpan(span, startIndex, commaIndex, spanText);
startIndex = commaIndex + 2;
} else {
final String spanText = categoryText.getText().toString().substring(startIndex, categoryText.getText().toString().length());
addCategorySpan(span, startIndex, categoryText.getText().toString().length(), spanText);
stillLooking = false;
}
}
v.setTag(item.id);
}
return v;
}
/* -------------------------
* Class: InventoryFilter
* ------------------------- */
private class InventoryFilter extends Filter {
private Object lock = new Object();
/* -------------------------
* Protected Methods
* ------------------------- */
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults results = new FilterResults();
if ( constraint == null || constraint.length() == 0 ) {
synchronized(lock) {
items = staticItems;
results.values = items;
results.count = items.size();
}
} else {
String searchString = constraint.toString();
// Do our category search
if ( searchString.startsWith("cat:") ) {
String trimmedSearch = searchString.substring(searchString.indexOf("://") + 3);
// Do our search
ArrayList<InventoryListItem> newItems = new ArrayList<InventoryListItem>();
for ( int i = 0; i <= items.size() - 1; i++ ) {
InventoryListItem item = items.get(i);
// See if we're a section, and if we have an item under us
if ( item.startNewSection && i < items.size() - 1 ) {
InventoryListItem next = items.get(i + 1);
if ( next.sectionName == item.sectionName ) {
if ( !next.startNewSection && next.categories.contains(trimmedSearch) ) {
newItems.add(item);
}
}
}
else if ( !item.startNewSection && item.categories.contains(trimmedSearch) ) {
newItems.add(item);
}
}
results.values = newItems;
results.count = newItems.size();
}
}
return results;
}
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
//noinspection unchecked
items = (ArrayList<InventoryListItem>)results.values;
// Let the adapter know about the updated list
if (results.count > 0) {
notifyDataSetChanged();
} else {
notifyDataSetInvalidated();
}
}
}
}