如何使用realm數據庫爲recyclerView存儲字符串？

Question

目前我正在使用字符串數組來存儲cardView中textview的'title'和'content'，但是爲了達到此目的，領域數據庫的聲音是一個更好的主意。我怎樣才能做到這一點？這是我回收適配器：

public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.ViewHolder> { 
    private ClipboardManager myClipboard; 
    private ClipData myClip; 
    private Context context; 

    public List<CardItemModel> cardItems; 

    public RecyclerAdapter(List<CardItemModel> cardItems){ 
     this.cardItems = cardItems; 
    } 

    public static class ViewHolder extends RecyclerView.ViewHolder{ 
     ImageView copyButton; 
     ImageView shareButton; 
     ToggleButton favButton; 

     TextView title; 
     TextView content; 
     public ViewHolder(View itemView) { 
      super(itemView); 
      this.title = (TextView)itemView.findViewById(R.id.card_title); 
      this.content = (TextView)itemView.findViewById(R.id.card_content); 
      this.copyButton= (ImageView) itemView.findViewById(R.id.copyButton); 
      this.shareButton=(ImageView) itemView.findViewById(R.id.shareButton); 

      this.favButton=(ToggleButton) itemView.findViewById(R.id.favButton); 

      favButton.setChecked(false); 
      favButton.setBackgroundDrawable(ContextCompat.getDrawable(favButton.getContext(), R.mipmap.ic_launcher)); 


     } 
    } 

    @Override 
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
     View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.recycler_item,parent,false); 
     ViewHolder viewHolder = new ViewHolder(view); 

     return viewHolder; 
    } 

    @Override 
    public void onBindViewHolder(final ViewHolder holder, int position) { 
     holder.title.setText(cardItems.get(position).title); 
     holder.content.setText(cardItems.get(position).content); 
     holder.copyButton.setOnClickListener(new View.OnClickListener(){ 
      public void onClick(View v){ 


       myClipboard = (ClipboardManager) v.getContext().getSystemService(Context.CLIPBOARD_SERVICE); 


       myClip = ClipData.newPlainText("label", holder.content.getText().toString()); 
       myClipboard.setPrimaryClip(myClip); 
       Toast.makeText(v.getContext(), "Copied to clipboard" , Toast.LENGTH_SHORT).show(); 

      } 
     }); 
     holder.shareButton.setOnClickListener(new View.OnClickListener(){ 
      public void onClick(View v){ 
       Intent share = new Intent(Intent.ACTION_SEND); 
       share.setType("text/plain"); 
       share.putExtra(Intent.EXTRA_TEXT, holder.content.getText().toString()); 
       v.getContext().startActivity(Intent.createChooser(share, "Share Text")); 
      } 
     }); 

     holder.favButton.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener(){ 
      @Override 
      public void onCheckedChanged(CompoundButton favButton, boolean isChecked){ 
       if (isChecked) 
        favButton.setBackgroundDrawable(ContextCompat.getDrawable(favButton.getContext(),R.mipmap.ic_launcher)); 

       else 
        favButton.setBackgroundDrawable(ContextCompat.getDrawable(favButton.getContext(), R.mipmap.ic_cart)); 
      } 
     }); 
    } 

    @Override 
    public int getItemCount() { 
     return cardItems.size(); 
    } 
} 

Answer 1

public class RecyclerAdapter extends RealmRecyclerViewAdapter<CardItemModel, RecyclerAdapter.ViewHolder> { 
    private ClipboardManager myClipboard; 
    private ClipData myClip; 
    private Context context; 

    public RecyclerAdapter(OrderedRealmCollection<CardItemModel> cardItems){ 
     super(cardItems, true); // this is `realm.where(CardItemModel.class).findAllSortedAsync("someField"); 
    } 

    public static class ViewHolder extends RecyclerView.ViewHolder{ 
     ImageView copyButton; 
     ImageView shareButton; 
     ToggleButton favButton; 

     TextView title; 
     TextView content; 
     public ViewHolder(View itemView) { 
      super(itemView); 
      this.title = (TextView)itemView.findViewById(R.id.card_title); 
      this.content = (TextView)itemView.findViewById(R.id.card_content); 
      this.copyButton= (ImageView) itemView.findViewById(R.id.copyButton); 
      this.shareButton=(ImageView) itemView.findViewById(R.id.shareButton); 

      this.favButton=(ToggleButton) itemView.findViewById(R.id.favButton); 

      favButton.setChecked(false); 
      favButton.setBackgroundDrawable(ContextCompat.getDrawable(favButton.getContext(), R.mipmap.ic_launcher)); 


     } 
    } 

    @Override 
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
     View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.recycler_item,parent,false); 
     ViewHolder viewHolder = new ViewHolder(view); 

     return viewHolder; 
    } 

    @Override 
    public void onBindViewHolder(final ViewHolder holder, int position) { 
     CardItemModel cardItem = getData().get(position); 
     holder.title.setText(cardItem.title); 
     holder.content.setText(cardItem.content); 
     holder.copyButton.setOnClickListener(new View.OnClickListener(){ 
      public void onClick(View v){ 
       myClipboard = (ClipboardManager) v.getContext().getSystemService(Context.CLIPBOARD_SERVICE); 
       myClip = ClipData.newPlainText("label", holder.content.getText().toString()); 
       myClipboard.setPrimaryClip(myClip); 
       Toast.makeText(v.getContext(), "Copied to clipboard" , Toast.LENGTH_SHORT).show();  
      } 
     }); 
     holder.shareButton.setOnClickListener(new View.OnClickListener(){ 
      public void onClick(View v){ 
       Intent share = new Intent(Intent.ACTION_SEND); 
       share.setType("text/plain"); 
       share.putExtra(Intent.EXTRA_TEXT, holder.content.getText().toString()); 
       v.getContext().startActivity(Intent.createChooser(share, "Share Text")); 
      } 
     }); 

     holder.favButton.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener(){ 
      @Override 
      public void onCheckedChanged(CompoundButton favButton, boolean isChecked){ 
       if (isChecked) favButton.setBackgroundDrawable(ContextCompat.getDrawable(favButton.getContext(),R.mipmap.ic_launcher)); 

       else favButton.setBackgroundDrawable(ContextCompat.getDrawable(favButton.getContext(), R.mipmap.ic_cart)); 
      } 
     }); 
    } 
} 

而且CardItemModel將extends RealmObject。適配器將顯示Realm中的任何內容。