如何对项目执行操作单击以在RecyclerView的CardView中显示结果

Question

我对Android编程非常陌生。我无法解决我几天来一直试图解决的当前问题。

我想单击填充的数组列表的项目并获取位置，即Cardview中的搜索词结果（ItemClickListener或OnSuggestionListener都没有在这里工作。这是我的MainActivity代码，如果有人可以帮助我，我将非常感谢：

    RecyclerView recyclerView;
    RecyclerView.LayoutManager layoutManager;
    SearchAdapter adapter;

    MaterialSearchBar materialSearchBar;
    List<String> suggestList = new ArrayList<>();
    Database database;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //init View
        recyclerView = (RecyclerView) findViewById(R.id.recycler_search);
        layoutManager = new LinearLayoutManager(this);
        recyclerView.setLayoutManager(layoutManager);
        recyclerView.setHasFixedSize(true);

        materialSearchBar = (MaterialSearchBar) findViewById(R.id.search_bar);

        database = new Database(this);

        materialSearchBar.setHint("Search");
        materialSearchBar.setCardViewElevation(10);
        loadSuggestList();
        materialSearchBar.addTextChangeListener (new TextWatcher() {


            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                List<String> suggest = new ArrayList<>();
                for (String search : suggestList) {
                    if (search.toLowerCase().contains(materialSearchBar.getText().toLowerCase()))
                        suggest.add(search);
                }
                materialSearchBar.setLastSuggestions(suggest);
            }

            @Override
            public void afterTextChanged(Editable s) {
            }
        });

        materialSearchBar.setOnSearchActionListener (new MaterialSearchBar.OnSearchActionListener() {
            @Override
            public void onSearchStateChanged(boolean enabled) {
                if (!enabled)
                    adapter = new SearchAdapter(getBaseContext(), database.getLughats());
                    recyclerView.setAdapter(adapter);
            }

            @Override
            public void onSearchConfirmed(CharSequence text) {
                startSearch(text.toString());
            }

            @Override
            public void onButtonClicked(int buttonCode) {
            }

        });

        adapter = new SearchAdapter(this, database.getLughats());
        recyclerView.setAdapter(adapter);

    }

    private void startSearch(String text) {
        adapter = new SearchAdapter(this, database.getLughatByWort(text));
        recyclerView.setAdapter(adapter);
    }

    private void loadSuggestList() {
        suggestList = database.getWorts();
        materialSearchBar.setLastSuggestions(suggestList);
    }
}```

Let me know if I should post here also my AdapterCode for the ViewHolder.

Thank you for your help in advance!

Answer 1

这里是我的AdapterCode：

class SearchViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{

    RecyclerItemClick itemClickListener;
    public TextView wort, praeteritum, partizip2, artikelGrammatik, uebersetzung1, uebersetzung2;
    public ImageButton button1, button2;


    public SearchViewHolder(@NonNull View itemView) {
        super(itemView);

        wort = (TextView)itemView.findViewById(R.id.wort);
        praeteritum = (TextView)itemView.findViewById(R.id.praeteritum);
        partizip2 = (TextView)itemView.findViewById(R.id.partizip2);
        artikelGrammatik = (TextView)itemView.findViewById(R.id.artikelGrammatik);
        uebersetzung1 = (TextView)itemView.findViewById(R.id.uebersetzung1);
        uebersetzung2 = (TextView)itemView.findViewById(R.id.uebersetzung2);

        button1 = (ImageButton)itemView.findViewById(R.id.button_id_1);
        button2 = (ImageButton) itemView.findViewById(R.id.button_id_2);

        itemView.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        this.itemClickListener.onItemClickListener(v, getLayoutPosition());
    }

    public void setItemClickListener(RecyclerItemClick ic) {
        this.itemClickListener = ic;
    }
}
        public class SearchAdapter extends RecyclerView.Adapter<SearchViewHolder> {

            private Context context;
            private List<Lughat> lughats;

            public SearchAdapter(Context context, List<Lughat> lughats) {
                this.context = context;
                this.lughats = lughats;

            }

            @NonNull
            @Override
            public SearchViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
                LayoutInflater inflater = LayoutInflater.from(parent.getContext());
                final View itemView = inflater.inflate(R.layout.layout_item, parent, false);
                return new SearchViewHolder(itemView);
            }

            @Override
            public void onBindViewHolder(@NonNull final SearchViewHolder holder, final int position) {

                holder.wort.setText(lughats.get(position).getWort());
                holder.praeteritum.setText(lughats.get(position).getPraeteritum());
                holder.partizip2.setText(lughats.get(position).getPartizip2());
                holder.artikelGrammatik.setText(lughats.get(position).getArtikelGrammatik());
                holder.uebersetzung1.setText(lughats.get(position).getUebersetzung1());
                holder.uebersetzung2.setText(lughats.get(position).getUebersetzung2());

                CharSequence praet;
                praet = holder.praeteritum.getText();
                if (praet.length() == 0) {
                    holder.praeteritum.setVisibility(View.GONE);
                    holder.button1.setVisibility(View.GONE);
                } else {
                    holder.praeteritum.setVisibility(View.VISIBLE);
                    holder.button1.setVisibility(View.VISIBLE);
                }

                CharSequence part2;
                part2 = holder.partizip2.getText();
                if (part2.length() == 0) {
                    holder.partizip2.setVisibility(View.GONE);
                } else {
                    holder.partizip2.setVisibility(View.VISIBLE);
                }

                CharSequence artGr;
                artGr = holder.artikelGrammatik.getText();
                if (artGr.length() == 0) {
                    holder.artikelGrammatik.setVisibility(View.GONE);
                    holder.button2.setVisibility(View.GONE);
                } else {
                    holder.artikelGrammatik.setVisibility(View.VISIBLE);
                    holder.button2.setVisibility(View.VISIBLE);
                }

                CharSequence ueb2;
                ueb2 = holder.uebersetzung2.getText();
                if (ueb2.length() == 0) {
                    holder.uebersetzung2.setVisibility(View.GONE);
                } else {
                    holder.uebersetzung2.setVisibility(View.VISIBLE);
                }

                holder.button1.setOnClickListener(new ToastMaker(context.getApplicationContext()));
                holder.button2.setOnClickListener(new ToastMaker(context.getApplicationContext()));

                holder.setItemClickListener(new RecyclerItemClick() {
                    @Override
                    public void onItemClickListener(View v, int position) {

                        Toast.makeText(context, "Begriff", Toast.LENGTH_LONG).show();

                    }
                });
            }

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

Answer 2

如果我也使用OnClickListener这样做，它也将无法正常工作，它不会调用方法startSearch。

        button3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                CharSequence text = materialSearchBar.getText();
                Toast.makeText(getApplicationContext(), text, Toast.LENGTH_LONG).show();
                startSearch(text.toString());
            }