Add favorite button as a list

I have a listview, which has a favorite button for each list item, which when clicked must add a list item to another action, called my fav9rites. I use the Baseadapter for listview and Sharedpreference to add favorites. When I click the Favorites button, the list view item is added to my activity, but I have the following problems:

1), when you click the Favorites button, a darkness should appear, indicating that the list item has been added to favorites. This happens, but when I close the activity and come back again, the button goes back, not the dark

2) with a long press on the list item in my favorite activity, the list item should be removed from the favorite, but this does not happen.

I hope everyone understands my question.

My code

my base adapter

public View getView(final int position, View view, ViewGroup parent) { final ViewHolder holder; if(view == null){ holder = new ViewHolder(); view = inflater.inflate(R.layout.beg_list_item,null); holder.listHeading = (TextView) view.findViewById(R.id.beg_list_itemTextView); // holder.listHash = (TextView) view.findViewById(R.id.listview_hashtags); holder.alphabetList = (ImageView) view.findViewById(R.id.beg_list_itemImageView); holder.favoriteImg = (ImageView) view.findViewById(R.id.favbtn); view.setTag(holder); }else{ holder = (ViewHolder) view.getTag(); } CodeList code = (CodeList) getItem(position); holder.listHeading.setText(codeList.get(position).getListHeading()); imageLoader.DisplayImage(codeList.get(position).getAlphabetimg(), holder.alphabetList); // holder.listHash.setText(codeList.get(position).getListHashTags()); if (checkFavoriteItem(code)) { holder.favoriteImg.setImageResource(R.drawable.favorite); holder.favoriteImg.setTag("yes"); } else { holder.favoriteImg.setImageResource(R.drawable.unfavorite); holder.favoriteImg.setTag("no"); } view.setOnClickListener(new OnClickListener(){ @Override public void onClick(View arg0){ Intent intent = new Intent(context, SingleItemView.class); //intent.putExtra("listheading", // (codeList.get(position).getListHeading())); //intent.putExtra("alphabetimg", // (codeList.get(position).getAlphabetimg())); intent.putExtra("demovideo", (codeList.get(position).getDailogdemovideo())); intent.putExtra("download", (codeList.get(position).getDownloadCode())); // Start SingleItemView Class context.startActivity(intent); } }); final ImageView favoritesbutton = (ImageView) view.findViewById(R.id.favbtn); favoritesbutton.setOnClickListener(new OnClickListener(){ @Override public void onClick(View v){ String tag = favoritesbutton.getTag().toString(); if(tag.equalsIgnoreCase("no")){ shrdPrefence.addFavorite(context, codeList.get(position)); Toast.makeText(context, R.string.fav_added, Toast.LENGTH_SHORT).show(); favoritesbutton.setTag("yes"); favoritesbutton.setImageResource(R.drawable.favorite); }else{ shrdPrefence.removeFavorite(context, codeList.get(position)); favoritesbutton.setTag("no"); favoritesbutton.setImageResource(R.drawable.unfavorite); Toast.makeText(context, R.string.fav_removed, Toast.LENGTH_SHORT).show(); } } }); return view; } //Checks whether a particular product exists in SharedPreferences*/ public boolean checkFavoriteItem(CodeList checkCode) { boolean check = false; List<CodeList> favorites = shrdPrefence.getFavorites(context); if (favorites != null) { for (CodeList code : favorites) { if (code.equals(checkCode)) { check = true; break; } } } return check; } public void add(CodeList code) { codeList.add(code); notifyDataSetChanged(); } public void remove(CodeList code) { codeList.remove(code); notifyDataSetChanged(); } 

sharedpreference.java

 public class SharedPreference { public static final String PREFS_NAME = "MY_APP"; public static final String FAVORITES = "code_Favorite"; public SharedPreference(){ super(); } public void saveFavorites(Context context, List<CodeList> favorites){ SharedPreferences settings; Editor editor; settings = context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE); editor = settings.edit(); Gson gson = new Gson(); String jsonFavorites = gson.toJson(favorites); editor.putString(FAVORITES, jsonFavorites); editor.commit(); } public void addFavorite(Context context, CodeList code){ List<CodeList> favorites = getFavorites(context); if(favorites == null) favorites = new ArrayList<CodeList>(); favorites.add(code); saveFavorites(context,favorites); } public void removeFavorite(Context context, CodeList code) { ArrayList<CodeList> favorites = getFavorites(context); if (favorites != null) { favorites.remove(code); saveFavorites(context, favorites); } } public ArrayList<CodeList> getFavorites(Context context) { SharedPreferences settings; List<CodeList> favorites; settings = context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE); if (settings.contains(FAVORITES)) { String jsonFavorites = settings.getString(FAVORITES, null); Gson gson = new Gson(); CodeList[] favoriteItems = gson.fromJson(jsonFavorites, CodeList[].class); favorites = Arrays.asList(favoriteItems); favorites = new ArrayList<CodeList>(favorites); } else return null; return (ArrayList<CodeList>) favorites; } } 

MyFavActivity.class

 public class MyFavActivity extends Activity { SharedPreference shrdPrfence; List<CodeList> favorites; FinalAdapter fnlAdpter; Context context = this.context; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.fav_layout); shrdPrfence = new SharedPreference(); favorites = shrdPrfence.getFavorites(MyFavActivity.this); if(favorites == null){ Dialog dialog = new Dialog(MyFavActivity.this); dialog.setTitle(R.string.nofav_title); dialog.show(); }else{ if(favorites.size() == 0){ Dialog dialog = new Dialog(MyFavActivity.this); dialog.setTitle(R.string.nofav_title); dialog.show(); } ListView favList = (ListView) findViewById(R.id.fav_layoutListView); if(favorites != null){ fnlAdpter = new FinalAdapter(MyFavActivity.this, favorites); favList.setAdapter(fnlAdpter); favList.setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView<?> parent, View arg1, int position, long arg3) { } }); favList.setOnItemLongClickListener(new OnItemLongClickListener() { @Override public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) { ImageView button = (ImageView) view .findViewById(R.id.favbtn); String tag = button.getTag().toString(); if (tag.equalsIgnoreCase("no")) { shrdPrfence.addFavorite(MyFavActivity.this, favorites.get(position)); Toast.makeText( MyFavActivity.this, R.string.fav_added, Toast.LENGTH_SHORT).show(); button.setTag("yes"); button.setImageResource(R.drawable.favorite); } else { shrdPrfence.removeFavorite(MyFavActivity.this, favorites.get(position)); button.setTag("no"); button.setImageResource(R.drawable.unfavorite); fnlAdpter.remove(favorites.get(position)); Toast.makeText( MyFavActivity.this, R.string.fav_removed, Toast.LENGTH_SHORT).show(); } return true; } }); } } } }