如何使用共享首选项来实现像按钮一样

Question

我正在做一个简单的引号应用程序，其中包含cardView中的引号。我已经将值存储在值>数组中。在我的应用程序中有两个片段，其中包含cardview中的引号，下一个片段是收藏夹。我在cardView中创建了一个类似按钮，这样当按下类似按钮时，我希望该Cardview出现在收藏夹片段中。我可以使用sharedpreferences来做到这一点吗？如果是，如何？

的recylerAdapter我cardView下面给出：

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(); 
     } 
    } 

这是我的片段包含引号：

public class Category1 extends Fragment { 

    private List<CardItemModel> cardItems = new ArrayList<>(20); 



    private MainActivity mainActivity; 
    private Toolbar toolbar; 
    private RecyclerView recyclerView; 
    private RecyclerAdapter recyclerAdapter; 

    public static ArrayList<CardItemModel> data; 


    public Category1() { 

    } 
    @Override 
    public void onAttach(Activity activity) { 
     super.onAttach(activity); 
     mainActivity = (MainActivity)activity; 
    } 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
          Bundle savedInstanceState) { 

     View view = inflater.inflate(R.layout.cat1_fragment, container, false); 

     toolbar = (Toolbar)view.findViewById(R.id.fab_toolbar); 

     setupToolbar(); 



     recyclerView = (RecyclerView)view.findViewById(R.id.fab_recycler_view); 

     setupRecyclerView(); 

     return view; 
    } 

    @Override 
    public void onActivityCreated(Bundle savedInstanceState) { 





     super.onActivityCreated(savedInstanceState); 
     mainActivity.setupNavigationDrawer(toolbar); 
    } 

    private void setupToolbar(){ 
     toolbar.setTitle(getString(R.string.cat1_fragment_title)); 
     mainActivity.setSupportActionBar(toolbar); 
    } 

    private void setupRecyclerView(){ 
     recyclerView.setLayoutManager(new LinearLayoutManager(mainActivity)); 
     recyclerView.setHasFixedSize(true); 
     initializeCardItemList(); 
     recyclerAdapter = new RecyclerAdapter(cardItems); 
     recyclerView.setAdapter(recyclerAdapter); 
    } 

    private void initializeCardItemList(){ 
     CardItemModel cardItemModel; 
     String[] cardTitles = getResources().getStringArray(R.array.cat1_cards); 
     String[] cardContents = getResources().getStringArray(R.array.cat1_cards_content); 
     final int length = cardTitles.length; 
     for(int i=0;i<length;i++){ 
      cardItemModel = new CardItemModel(cardTitles[i],cardContents[i]); 
      cardItems.add(cardItemModel); 
     } 
    } 



} 

如何设置我最喜欢的片段，这样我可以得到从中受益的物品。 这是我的模特班。

public class CardItemModel { 

    public String title; 
    public String content; 

    public CardItemModel(String title, String content) { 
     this.title = title; 
     this.content = content; 
    } 
} 

Answer 1

1. 不要使用static viewHolder。
2. 请勿在BindViewHolder中使用onClickListener。在ViewHolder中使用它。显然，它使用viewHolder中的实例。
3. 请勿将两个单独的数组用于引号（字符串）和收藏夹（布尔值）。像这样的操作使用模型类。

如果您有任何查询，DM给我。祝一切顺利。