Animated app(Launcher) icon

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  I want to convert Listview to RecyclerView in my app, I tried to convert code but stucked at getView method, can any one explain how to use this getView code in Recylcer view.

  Adapter for ListView CardAdapter.java

  public class CardAdapter extends ArrayAdapter<CardDataModel> {
  
      private Context context;
      List<CardDataModel> cards;
      SharedPreference sharedPreference;
  
      public CardAdapter(Context context, List<CardDataModel> cards) {
          super(context, R.layout.card_list_item, cards);
          this.context = context;
          this.cards = cards;
          sharedPreference = new SharedPreference();
      }
  
      private class ViewHolder {
          TextView CardNameTxt;
          TextView CardDescTxt;
          TextView CardPriceTxt;
          ImageView favoriteImg;
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      @Override
      public int getCount() {
          return cards.size();
      }
  
      @Override
      public CardDataModel getItem(int position) {
          return cards.get(position);
      }
  
      @Override
      public long getItemId(int position) {
          return 0;
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      @Override
      public View getView(int position, View convertView, ViewGroup parent) {
          ViewHolder holder = null;
          if (convertView == null) {
              LayoutInflater inflater = (LayoutInflater) context
                      .getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
              convertView = inflater.inflate(R.layout.card_list_item, null);
              holder = new ViewHolder();
              holder.CardNameTxt = (TextView) convertView
                      .findViewById(R.id.txt_crd_name);
              holder.CardDescTxt = (TextView) convertView
                      .findViewById(R.id.txt_crd_desc);
              holder.CardPriceTxt = (TextView) convertView
                      .findViewById(R.id.txt_crd_no);
              holder.favoriteImg = (ImageView) convertView
                      .findViewById(R.id.imgbtn_favorite);
  
              convertView.setTag(holder);
          } else {
              holder = (ViewHolder) convertView.getTag();
          }
          CardDataModel card = (CardDataModel) getItem(position);
          holder.CardNameTxt.setText(card.getName());
          holder.CardDescTxt.setText(card.getDescription());
          holder.CardPriceTxt.setText(card.getPrice() + " ");
  
          /*If a product exists in shared preferences then set heart_red drawable
           * and set a tag*/
          if (checkFavoriteItem(card)) {
              holder.favoriteImg.setImageResource(R.drawable.heart_red);
              holder.favoriteImg.setTag("red");
          } else {
              holder.favoriteImg.setImageResource(R.drawable.heart_grey);
              holder.favoriteImg.setTag("grey");
          }
  
          return convertView;
      }
  
  
  
  
      public boolean checkFavoriteItem(CardDataModel checkCard) {
          boolean check = false;
          List<CardDataModel> favorites = sharedPreference.getFavorites(context);
          if (favorites != null) {
              for (CardDataModel card : favorites) {
                  if (card.equals(checkCard)) {
                      check = true;
                      break;
                  }
              }
          }
          return check;
      }
  
      @Override
      public void add(CardDataModel card) {
          super.add(card);
          cards.add(card);
          notifyDataSetChanged();
      }
  
      @Override
      public void remove(CardDataModel card) {
          super.remove(card);
          cards.remove(card);
          notifyDataSetChanged();
      }
  }
  

  converted somecode like this in RecyclerView Adapter ... CardRvAdapter.java

  public class CardRvAdapter extends RecyclerView.Adapter<CardRvAdapter.MyViewHolder> {
  
  
      private Context context;
      List<CardDataModel> cards;
      SharedPreference sharedPreference;
  
      public CardRvAdapter(Context context, List<CardDataModel> cards) {
  
          this.context = context;
          this.cards = cards;
          sharedPreference = new SharedPreference(); }
  
      @Override
      public int getItemCount() {
          return cards.size();
      }
  
      @NonNull
      @Override
      public MyViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
  
          // on create view holder code
          View view;
          LayoutInflater mInflater = LayoutInflater.from(context);
          view  = mInflater.inflate(R.layout.card_list_item, viewGroup,false);
          return new MyViewHolder(view);
      }
  
      @Override
      public void onBindViewHolder(@NonNull MyViewHolder myViewHolder, int i) {
  
          //on bind view holder code
          myViewHolder.CardPriceTxt.setText(cards.get(i).getPrice());
          myViewHolder.CardNameTxt.setText(cards.get(i).getName());
          myViewHolder.CardDescTxt.setText(cards.get(i).getDescription());
  
          if (checkFavoriteItem(card)) {
             myViewHolder.favoriteImg.setImageResource(R.drawable.heart_red);
              myViewHolder.favoriteImg.setTag("red");
          } else {
              myViewHolder.favoriteImg.setImageResource(R.drawable.heart_grey);
              myViewHolder.favoriteImg.setTag("grey");
          } }
  
          // checking for favotites in shared preferences
  
          public boolean checkFavoriteItem(CardDataModel checkCard) {
          boolean check = false;
          List<CardDataModel> favorites = sharedPreference.getFavorites(context);
          if (favorites != null) {
              for (CardDataModel card : favorites) {
                  if (card.equals(checkCard)) {
                      check = true;
                      break;
                  }
              }
          }
          return check;
      }
  
      @Override
      public void add(CardDataModel card) {
          super.add(card);
          cards.add(card);
          notifyDataSetChanged();
      }
  
      @Override
      public void remove(CardDataModel card) {
          super.remove(card);
          cards.remove(card);
          notifyDataSetChanged();
      }
  
  
      public class MyViewHolder extends RecyclerView.ViewHolder {
          TextView CardNameTxt;
          TextView CardDescTxt;
          TextView CardPriceTxt;
          ImageView favoriteImg;
  
          public MyViewHolder(@NonNull View itemView) {
              super(itemView);
              this.CardDescTxt = (TextView) itemView.findViewById(R.id.txt_crd_desc);
              this.CardNameTxt = (TextView) itemView.findViewById(R.id.txt_crd_name);
              this.CardPriceTxt = (TextView) itemView.findViewById(R.id.txt_crd_no);
              this.favoriteImg = (ImageView) itemView.findViewById(R.id.imgbtn_favorite);
              }}}
  

  The problem part..

   public View getView(int position, View convertView, ViewGroup parent) {
          ViewHolder holder = null;
          if (convertView == null) {
              LayoutInflater inflater = (LayoutInflater) context
                      .getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
              convertView = inflater.inflate(R.layout.card_list_item, null);
              holder = new ViewHolder();
              holder.CardNameTxt = (TextView) convertView
                      .findViewById(R.id.txt_crd_name);
              holder.CardDescTxt = (TextView) convertView
                      .findViewById(R.id.txt_crd_desc);
              holder.CardPriceTxt = (TextView) convertView
                      .findViewById(R.id.txt_crd_no);
              holder.favoriteImg = (ImageView) convertView
                      .findViewById(R.id.imgbtn_favorite);
  
              convertView.setTag(holder);
          } else {
              holder = (ViewHolder) convertView.getTag();
          }
          CardDataModel card = (CardDataModel) getItem(position);
          holder.CardNameTxt.setText(card.getName());
          holder.CardDescTxt.setText(card.getDescription());
          holder.CardPriceTxt.setText(card.getPrice() + " ");
  
          /*If a product exists in shared preferences then set heart_red drawable
           * and set a tag*/
          if (checkFavoriteItem(card)) {
              holder.favoriteImg.setImageResource(R.drawable.heart_red);
              holder.favoriteImg.setTag("red");
          } else {
              holder.favoriteImg.setImageResource(R.drawable.heart_grey);
              holder.favoriteImg.setTag("grey");
          }
  
          return convertView;
      }
  

  How to modify this code and where to add this checkFavItem, add , and remove methods..suggest me , i am new to android development.
• how to solve catch or finally expected error?

  How to solve "'catch' or 'finally' expected" error in android studio..?

  a screenshot of the error

  public class FragmentRecent extends Fragment {
  
      View root_view, parent_view;
      private RecyclerView recyclerView;
      private AdapterChannel adapterChannel;
      private SwipeRefreshLayout swipeRefreshLayout;
      private Call<CallbackChannel> callbackCall = null;
      private int post_total = 0;
      private int failed_page = 0;
      private InterstitialAd interstitialAd;
      private OfflineDatabase databaseHelper;
      int counter = 3;
  
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          swipeRefreshLayout = (SwipeRefreshLayout) root_view.findViewById(R.id.swipe_refresh_layout_home);
          swipeRefreshLayout.setColorSchemeResources(R.color.orange, R.color.green, R.color.blue, R.color.red);
  
          recyclerView = (RecyclerView) root_view.findViewById(R.id.recyclerViewHome);
          recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
          recyclerView.setHasFixedSize(true);
  
  
          //set data and list adapter
          adapterChannel = new AdapterChannel(getActivity(), recyclerView, new ArrayList<Channel>());
          recyclerView.setAdapter(adapterChannel);
  
          // on item list clicked
          adapterChannel.setOnItemClickListener(new AdapterChannel.OnItemClickListener() {
              @Override
              public void onItemClick(View v, Channel obj, int position) {
                  Intent intent = new Intent(getActivity(), ActivityDetailChannel.class);
                  intent.putExtra(Constant.KEY_CHANNEL_CATEGORY, obj.category_name);
                  intent.putExtra(Constant.KEY_CHANNEL_ID, obj.channel_id);
                  intent.putExtra(Constant.KEY_CHANNEL_NAME, obj.channel_name);
                  intent.putExtra(Constant.KEY_CHANNEL_IMAGE, obj.channel_image);
                  intent.putExtra(Constant.KEY_CHANNEL_URL, obj.channel_url);
                  intent.putExtra(Constant.KEY_CHANNEL_DESCRIPTION, obj.channel_description);
                  startActivity(intent);
  
                  showInterstitialAd();
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          });
  
          // detect when scroll reach bottom
          adapterChannel.setOnLoadMoreListener(new AdapterChannel.OnLoadMoreListener() {
              @Override
              public void onLoadMore(int current_page) {
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                      int next_page = current_page + 1;
                      requestAction(next_page);
                  } else {
                      adapterChannel.setLoaded();
                  }
              }
          });
  
          // on swipe list
          swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
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              public void onRefresh() {
                  if (callbackCall != null && callbackCall.isExecuted()) callbackCall.cancel();
                  adapterChannel.resetListData();
                  requestAction(1);
              }
          });
  
          requestAction(1);
  
  
          return root_view;
      }
  
      private void displayApiResult(final List<Channel> channels) {
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          swipeProgress(false);
          if (channels.size() == 0) {
              showNoItemView(true);
          }
      }
  
      private void requestListPostApi(final int page_no) {
          ApiInterface apiInterface = RestAdapter.createAPI();
          callbackCall = apiInterface.getPostByPage(page_no, Config.LOAD_MORE);
          callbackCall.enqueue(new Callback<CallbackChannel>() {
              @Override
              public void onResponse(Call<CallbackChannel> call, Response<CallbackChannel> response) {
                  CallbackChannel resp = response.body();
                  if (resp != null && resp.status.equals("ok")) {
                      post_total = resp.count_total;
                      displayApiResult(resp.posts);
                  } else {
                      onFailRequest(page_no);
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              }
  
              @Override
              public void onFailure(Call<CallbackChannel> call, Throwable t) {
                  if (!call.isCanceled()) onFailRequest(page_no);
              }
  
          });
      }
  
      private void onFailRequest(int page_no) {
          failed_page = page_no;
          adapterChannel.setLoaded();
          swipeProgress(false);
          if (NetworkCheck.isConnect(getActivity())) {
          } else {
              //showToast("Internet Not");
              if (databaseHelper.getOfflineData("FragmentCategory").length() != 0) {
                  setJson(databaseHelper.getOfflineData("FragmentCategory"), false);
              }
          }
      }
      //databaseHelper.removeAll();
  
  
      private void requestAction(final int page_no) {
          showFailedView(false, "");
          showNoItemView(false);
          if (page_no == 1) {
              swipeProgress(true);
          } else {
              adapterChannel.setLoading();
          }
          new Handler().postDelayed(new Runnable() {
              @Override
              public void run() {
                  requestListPostApi(page_no);
              }
          }, Constant.DELAY_TIME);
      }
  
      @Override
      public void onDestroy() {
          super.onDestroy();
          swipeProgress(false);
          if (callbackCall != null && callbackCall.isExecuted()) {
              callbackCall.cancel();
          }
      }
  
      private void showFailedView(boolean show, String message) {
          View lyt_failed = (View) root_view.findViewById(R.id.lyt_failed_home);
          ((TextView) root_view.findViewById(R.id.failed_message)).setText(message);
          if (show) {
              recyclerView.setVisibility(View.GONE);
              lyt_failed.setVisibility(View.VISIBLE);
          } else {
              recyclerView.setVisibility(View.VISIBLE);
              lyt_failed.setVisibility(View.GONE);
          }
          ((Button) root_view.findViewById(R.id.failed_retry)).setOnClickListener(new View.OnClickListener() {
              @Override
              public void onClick(View view) {
                  requestAction(failed_page);
              }
          });
      }
  
      private void showNoItemView(boolean show) {
          View lyt_no_item = (View) root_view.findViewById(R.id.lyt_no_item_home);
          ((TextView) root_view.findViewById(R.id.no_item_message)).setText(R.string.no_post_found);
          if (show) {
              recyclerView.setVisibility(View.GONE);
              lyt_no_item.setVisibility(View.VISIBLE);
          } else {
              recyclerView.setVisibility(View.VISIBLE);
              lyt_no_item.setVisibility(View.GONE);
          }
      }
  
  
      private void swipeProgress(final boolean show) {
          if (!show) {
              swipeRefreshLayout.setRefreshing(show);
              return;
          }
          swipeRefreshLayout.post(new Runnable() {
              @Override
              public void run() {
                  swipeRefreshLayout.setRefreshing(show);
              }
          });
      }
  
      public void setJson(String result, Boolean isOnline) {
          try {
  
              //inseting result to database
              if(isOnline) {
                  ContentValues offline_data = new ContentValues();
  
                  offline_data.put(OfflineDatabase.KEY_OFFLINE_DATA, result);
  
                  if(databaseHelper.getOfflineData("FragmentCategory").length()!=0) {
                      databaseHelper.update("FragmentCategory",offline_data);
                  } else {
                      offline_data.put(OfflineDatabase.KEY_ACTIVITY_NAME, "FragmentCategory");
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          if (Config.ENABLE_ADMOB_INTERSTITIAL_ADS) {
              interstitialAd = new InterstitialAd(getActivity());
              interstitialAd.setAdUnitId(getResources().getString(R.string.admob_interstitial_unit_id));
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              Log.d("AdMob", "AdMob Interstitial is Enabled");
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      private void showInterstitialAd() {
              if (Config.ENABLE_ADMOB_INTERSTITIAL_ADS) {
  
                  if (interstitialAd != null && interstitialAd.isLoaded()) {
  
                      if (counter == Config.ADMOB_INTERSTITIAL_ADS_INTERVAL) {
                          interstitialAd.show();
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                          counter++;
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                  Log.d("AdMob", "AdMob Interstitial is Disabled");
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