5
Tôi có một GridView và bộ điều hợp cho GridView (BasketAdapter mở rộng BaseAdapter).notifyDataSetChanged() không hoạt động với bộ điều hợp của tôi cho GridView
Tôi tải dữ liệu trong GridView từ tệp sharedpref. Sau khi tôi thay đổi dữ liệu, tôi lưu lại tệp sharedpref với dữ liệu và gọi notifyDataSetChanged(). Nhưng notifyDataSetChanged() không hoạt động không may.
Nếu tôi tạo bộ điều hợp mới và đặt nó thành GridView, nó hoạt động. Có ai có thể giúp tôi về vấn đề này không?
Đây là mã của tôi:
public class FragmentBasket extends SherlockFragment {
// my gridview
GridView gvCatalogAllStoneBasket;
// list of data from shared pref
ArrayList<CatalogItem> catalogItemBasket = new ArrayList<CatalogItem>();
ActionMode mode;
public static CatalogItem catalogItem;
// id variables for actionmode's actions
static final int ID_DELETE = 1;
static final int ID_EDIT = 2;
// shared pref id string
static String SHARED_PREFS_FILE = "basket";
// my adapter
BasketAdapter adapter = null;
public FragmentBasket() {
}
@Override
public void onStart() {
super.onStart();
// loading saved data from file
new GetCatalogAllStoneBasket().execute();
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Receiver receiver = new Receiver();
IntentFilter intentFilterAdd = new IntentFilter("com.example.myproject.ADD_ITEM_BASKET");
IntentFilter intentFilterEdit = new IntentFilter("com.example.myproject.EDIT_ITEM_BASKET");
IntentFilter intentFilterDelete = new IntentFilter("com.example.myproject.DELETE_ITEM_BASKET");
getActivity().registerReceiver(receiver, intentFilterAdd);
getActivity().registerReceiver(receiver, intentFilterEdit);
getActivity().registerReceiver(receiver, intentFilterDelete);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.right_panel_fragment_catalog_grid, container, false);
gvCatalogAllStoneBasket = (GridView)view.findViewById(R.id.gvCatalogAllStoneBasket);
gvCatalogAllStoneBasket.setOnItemLongClickListener(new OnItemLongClickListener() {
@Override
public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
// start action mode and send id of clicked item
mode = getSherlockActivity().startActionMode(new ActionModeOfBasket(String.valueOf(view.getTag())));
return false;
}
});
return view;
}
private final class ActionModeOfBasket implements ActionMode.Callback
{
String itemId;
public ActionModeOfBasket(String itemId) {
// get id from clicked item
this.itemId = itemId;
}
@Override
public boolean onCreateActionMode(ActionMode mode, Menu menu) {
menu.add(0, ID_EDIT, 0, "Edit")
.setIcon(android.R.drawable.ic_menu_edit)
.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_COLLAPSE_ACTION_VIEW);
menu.add(0, ID_DELETE, 1, "Delete")
.setIcon(android.R.drawable.ic_menu_delete)
.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_COLLAPSE_ACTION_VIEW);
return true;
}
@Override
public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
return false;
}
@Override
public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
// get file
SharedPreferences sPref = getActivity().getSharedPreferences(SHARED_PREFS_FILE, getActivity().MODE_PRIVATE);
// open file for reading, writing
BasketHelper bHelper = new BasketHelper(sPref, getActivity());
switch (item.getItemId())
{
// if clicked del button
case ID_DELETE:
// delete item
bHelper.DelItem(itemId);
mode.finish();
catalogItemBasket = bHelper.GetAllItems();
break;
// if clicked edit button
case ID_EDIT:
// edit item
bHelper.EditItem(itemId, getFragmentManager());
mode.finish();
catalogItemBasket = bHelper.GetAllItems();
break;
}
return true;
}
@Override
public void onDestroyActionMode(ActionMode mode) {
}
}
class GetCatalogAllStoneBasket extends AsyncTask<String, String, String>
{
@Override
protected void onPreExecute() {
super.onPreExecute();
}
@Override
protected String doInBackground(String... params) {
SharedPreferences sPref = getActivity().getSharedPreferences(FragmentCatalogStonePosition.SHARED_PREFS_FILE, getActivity().MODE_PRIVATE);
try {
if(sPref.getString(FragmentCatalogStonePosition.TASK, null) != null)
{
BasketHelper bHelper = new BasketHelper(sPref, getActivity());
catalogItemBasket = bHelper.GetAllItems();
}
} catch (Exception e) {
Log.d(MainActivity.tag, e.getMessage() + " " + e.getCause());
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
adapter = new BasketAdapter(getActivity(), catalogItemBasket);
gvCatalogAllStoneBasket.setAdapter(adapter);
}
}
class Receiver extends BroadcastReceiver
{
@Override
public void onReceive(Context context, Intent intent) {
if(intent.getAction().toString() == "com.example.myproject.ADD_ITEM_BASKET")
{
}
else if(intent.getAction().toString() == "com.example.myproject.EDIT_ITEM_BASKET")
{
// this code doesn't work (((
adapter.notifyDataSetChanged();
// this one successfully works
BasketAdapter bAdapter = new BasketAdapter(getActivity(), catalogItemBasket);
gvCatalogAllStoneBasket.setAdapter(bAdapter);
}
else if(intent.getAction().toString() == "com.example.myproject.DELETE_ITEM_BASKET")
{
}
}
}
class BasketAdapter extends BaseAdapter
{
Context context = null;
ArrayList<CatalogItem> data = null;
public BasketAdapter(Context context, ArrayList<CatalogItem> data) {
this.context = context;
this.data = data;
}
@Override
public int getCount() {
return data.size();
}
public CatalogItem getItem(int position) {
return data.get(position);
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = convertView;
if(view == null)
{
LayoutInflater inflater = getLayoutInflater(null);
view = inflater.inflate(R.layout.right_panel_fragment_catalog_grid_item, parent, false);
CatalogItem item = getItem(position);
((TextView)view.findViewById(R.id.tvCatalogItemBasketName)).setText(item.name + "/" + item.code);
Double gPrice = Double.valueOf(item.price) * Double.valueOf(item.count);
((TextView)view.findViewById(R.id.tvCatalogItemBasketCount)).setText(String.valueOf(item.count));
((TextView)view.findViewById(R.id.tvCatalogItemBasketGeneralPrice)).setText(String.valueOf(gPrice));
((TextView)view.findViewById(R.id.tvCatalogItemBasketDescription)).setText(item.description);
final ImageView imgView = (ImageView)view.findViewById(R.id.ivCatalogItemBasketImage);
String strURL = "http://myproject.ua/images/stock/" + item.folder + "/" + item.images + "_800x600.jpg";
ImageLoaderConfiguration config = ImageHelper.ImageConfig(getActivity().getApplicationContext());
DisplayImageOptions options = ImageHelper.ImageOptions();
ImageLoader imageLoader = ImageLoader.getInstance();
imageLoader.init(config);
final ProgressBar pImgDialog = (ProgressBar)view.findViewById(R.id.pbImage);
imageLoader.displayImage(strURL, imgView, options, new ImageLoadingListener() {
@Override
public void onLoadingStarted(String imageUri, View view) {
pImgDialog.setVisibility(View.VISIBLE);
imgView.setVisibility(View.GONE);
}
@Override
public void onLoadingFailed(String imageUri, View view, FailReason failReason) {
pImgDialog.setVisibility(View.GONE);
imgView.setVisibility(View.VISIBLE);
}
@Override
public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
pImgDialog.setVisibility(View.GONE);
imgView.setVisibility(View.VISIBLE);
}
@Override
public void onLoadingCancelled(String imageUri, View view) {
pImgDialog.setVisibility(View.GONE);
imgView.setVisibility(View.VISIBLE);
}
});
view.setTag(item.catalog_id);
}
return view;
}
}
}
nó không hoạt động = \ – Denis
ok, bây giờ tôi thấy nó, phương thức getView() của bạn là vấn đề .. convertView của bạn không phải là null trong trường hợp khung nhìn được tái chế – malimo
tuyệt vời! cảm ơn rất nhiều!) – Denis