我有一个recylerview，其中包含带有收藏夹按钮的项目，当我点击星形时，它会变成彩色，这是可以的但是当我离开片段或活动并返回到recylcerview时，星星会变灰，好像我没有＆ ＃39;击中它。
这是我的片段代码
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//activity = getActivity();
storesDataList = new ArrayList<HotOffersData>();
storesDataList.clear();
for (int i = 0; i < offername.length; i++) {
HotOffersData hotOffersData = new HotOffersData();
hotOffersData.setName(offername[i]);
hotOffersData.setExpire(expire[i]);
hotOffersData.setFlayerImage(flayersimage[i]);
//hotOffersData.isFavorite();
storesDataList.add(hotOffersData);
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_hot_offers, container, false);
MyRecyclerView = (RecyclerView) view.findViewById(R.id.cardView);
adapter = new HotOffersAdapter(getContext(), storesDataList);
MyRecyclerView.setHasFixedSize(true);
adapter.setListener(this);
RecyclerView.LayoutManager mLayoutManager = new GridLayoutManager(getContext(), 2);
MyRecyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
// getActivity（）。setTitle（＆＃34; Flyers List＆＃34;）;
MyRecyclerView.setLayoutManager(mLayoutManager);
MyRecyclerView.addItemDecoration(new GridSpacingItemDecoration(2, dpToPx(10), true));
MyRecyclerView.setItemAnimator(new DefaultItemAnimator());
MyRecyclerView.setAdapter(adapter);
MyRecyclerView.setLayoutManager(mLayoutManager);
// prepareAlbums();
return view;
}
这是适配器代码
public class HotOffersAdapter extends RecyclerView.Adapter<HotOffersAdapter.MyViewHolder> {
HotOffersAdapter adapter;
private ArrayList<StoresData> list;
static ClickListener clickListener;
DBSQLiteHandler dbHandler;
private Context mContext;
private List<HotOffersData> hotOffersDataList;
public ArrayList<HotOffersData> wordsListDB = new ArrayList<HotOffersData>();
public Object getItem(int location) {
return list.get(location);
}
public HotOffersAdapter(Context mContext, List<HotOffersData> hotOffersDataList) {
this.mContext = mContext;
this.hotOffersDataList = hotOffersDataList;
this.dbHandler = new DBSQLiteHandler(mContext);
this.wordsListDB = (ArrayList<HotOffersData>)hotOffersDataList ;
}
@Override
public HotOffersAdapter.MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.store_card, parent, false);
return new HotOffersAdapter.MyViewHolder(itemView);
}
@RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN)
@Override
public void onBindViewHolder(final HotOffersAdapter.MyViewHolder holder, final int position) {
HotOffersData hotOffersData = hotOffersDataList.get(position);
holder.title.setText(hotOffersData.getName());
holder.count.setText(" expires in " + hotOffersData.getexpire());
Glide.with(mContext).load(hotOffersData.getFlayerImage()).into(holder.thumbnail);
// loading storesData cover using Glide library
if(checkFavouriteItem(hotOffersData)){
Drawable starFilled = ResourcesCompat.getDrawable(mContext.getResources(), R.drawable.coloredstar, null);
starFilled.setBounds(0,0,24,24);
holder.overflow.setBackground(starFilled);
holder.overflow.setTag("filled");
}else{
Drawable starEmpty = ResourcesCompat.getDrawable(mContext.getResources(), R.drawable.favorite,null);
starEmpty.setBounds(0,0,24,24);
holder.overflow.setBackground(starEmpty);
holder.overflow.setTag("empty");
}
holder.thumbnail.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
final Intent intent;
if (position >= 0) {
final HotOffersData storesData1 = hotOffersDataList.get(position);
intent = new Intent(view.getContext(), FlyerDescription.class);
intent.putExtra("store_name", storesData1.getName());
intent.putExtra("store_image", storesData1.getFlayerImage());
view.getContext().startActivity(intent);
}
}
});
}
@Override
public int getItemCount() {
return hotOffersDataList.size();
}
public class MyViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
public TextView title, count;
public ImageView thumbnail, overflow;
CardView cardview;
boolean starred = false;
public MyViewHolder(View view) {
super(view);
cardview = (CardView) view.findViewById(R.id.card_view);
title = (TextView) view.findViewById(R.id.title);
count = (TextView) view.findViewById(R.id.count);
thumbnail = (ImageView) view.findViewById(R.id.thumbnail);
overflow = (ImageView) view.findViewById(R.id.overflow);
view.setOnClickListener(this);
overflow.setOnClickListener(new View.OnClickListener() {
@RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN)
@Override
public void onClick(View view) {
String tag = overflow.getTag().toString();
if (tag.equalsIgnoreCase("empty") && !starred) {
//SharedPreference way
//mSharedPreference.addFavorite(mContext, wordsList.get(getAdapterPosition()));
//SQLiteDB way
dbHandler.addWord(hotOffersDataList.get(getAdapterPosition()));
overflow.setTag("filled");
Drawable starFilled = ResourcesCompat.getDrawable(view.getResources(), R.drawable.coloredstar, null);
starFilled.setBounds(0, 0, 24, 24);
overflow.setBackground(starFilled);
Snackbar.make(view, "Added to Favorites", Snackbar.LENGTH_LONG).setAction("Remove",new View.OnClickListener() {
@Override
public void onClick(View view) {
//SharedPreference way
//mSharedPreference.removeFavorite(mContext, wordsList.get(getAdapterPosition()));
//SQLiteDB way
dbHandler.removeWord(hotOffersDataList.get(getAdapterPosition()));
Drawable star = ResourcesCompat.getDrawable(view.getResources(), R.drawable.favorite, null);
star.setBounds(0,0,24,24);
overflow.setBackground(star);
}
}).show();
} else {
//SharedPreference way
//mSharedPreference.removeFavorite(mContext, wordsList.get(getAdapterPosition()));
//SQLiteDB way
dbHandler.removeWord(hotOffersDataList.get(getAdapterPosition()));
//*****//
hotOffersDataList.remove(getAdapterPosition());
notifyItemRemoved(getAdapterPosition());
notifyItemRangeChanged(getAdapterPosition(), hotOffersDataList.size());
//*******//
overflow.setTag("empty");
Drawable starEmpty = ResourcesCompat.getDrawable(view.getResources(), R.drawable.favorite, null);
starEmpty.setBounds(0, 0, 24, 24);
overflow.setBackground(starEmpty);
}
starred =! starred;
}
});
}
@Override
public void onClick(View view) {
if(clickListener!=null){
clickListener.itemClicked(view, getAdapterPosition());
}
}
}
public boolean checkFavouriteItem(HotOffersData checkStarredItem) {
boolean check = false;
//shared preference way
/*List<Word> favouriteItemsInSharedPreference = mSharedPreference.getFavorites(mContext);
if (favouriteItemsInSharedPreference != null) {
for (Word word : favouriteItemsInSharedPreference) {
if (word.equals(checkStarredItem)) {
check = true;
break;
}
}
}*/
//SQLiteDB way
ArrayList<HotOffersData> itemsInDB = dbHandler.getWords();
if (itemsInDB != null) {
for (HotOffersData word : itemsInDB) {
if((word.getName()).equals(checkStarredItem.getName())) {
check = true;
break;
}
}
}
return check;
}
public void setListener(ClickListener clicked){
HotOffersAdapter.clickListener = clicked;
}
public interface ClickListener{
public void itemClicked(View view, int position);
}
}
我正在寻找的是存储喜欢的物品的状态，即使我关闭并启动应用程序也保持颜色
任何帮助将不胜感激