项目单击以进入回收站视图 [英] item click for recycler view

问题描述

我正在尝试对我在RecyclerView中弹出的不同项目单击项目.我在listView中实现了这一点，但是RecyclerView似乎很困难.我已经看过类似的问题，但无法解决.

I am trying to implement on item click for different items that i pop up in RecyclerView. I achieved that in listView but RecyclerView seem to be difficult. I have look at similar questions but couldn't get a solution.

如果用户单击一个"，则我希望它为两个"和三个"做某事.我如何实现这一目标?

if the user clicks on One, I want it to do something, also for two, and three. How do i get achieve this?

这是我的代码

public class MainFragment extends Fragment implements SearchView.OnQueryTextListener {

    public static MainFragment newInstance() {
        return new MainFragment();
    }

    private static final String[] MOVIES = new String[]{ "One", "Two", "Three" };

    private RecyclerView mRecyclerView;
    private ExampleAdapter mAdapter;
    private List<ExampleModel> mModels;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        final View view = inflater.inflate(R.layout.tms, container, false);

        mRecyclerView = (RecyclerView) view.findViewById(R.id.recycler_view);

        return view;
    }

    @Override
    public void onViewCreated(View view, Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        setHasOptionsMenu(true);

        mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));

        mModels = new ArrayList<>();

        for (String movie : MOVIES) {
            mModels.add(new ExampleModel(movie));
        }

        mAdapter = new ExampleAdapter(getActivity(), mModels);
        mRecyclerView.setAdapter(mAdapter);


    }


    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        inflater.inflate(R.menu.search_two, menu);

        final MenuItem item = menu.findItem(R.id.action_search);
        final SearchView searchView = (SearchView) MenuItemCompat.getActionView(item);
        searchView.setOnQueryTextListener(this);
    }

    @Override
    public boolean onQueryTextChange(String query) {
        final List<ExampleModel> filteredModelList = filter(mModels, query);
        mAdapter.animateTo(filteredModelList);
        mRecyclerView.scrollToPosition(0);
        return true;
    }

    @Override
    public boolean onQueryTextSubmit(String query) {
        return false;
    }

    private List<ExampleModel> filter(List<ExampleModel> models, String query) {
        query = query.toLowerCase();

        final List<ExampleModel> filteredModelList = new ArrayList<>();
        for (ExampleModel model : models) {
            final String text = model.getText().toLowerCase();
            if (text.contains(query)) {
                filteredModelList.add(model);
            }
        }
        return filteredModelList;
    }
}

ViewHolder

The ViewHolder

public class ExampleViewHolder extends RecyclerView.ViewHolder {

    private final TextView tvText;

    public ExampleViewHolder(View itemView) {
        super(itemView);

        tvText = (TextView) itemView.findViewById(R.id.tvText);
    }

    public void bind(ExampleModel model) {
        tvText.setText(model.getText());  
    }
}

这里是扩展RecyclerView的适配器-

Here is the Adapter that extends the RecyclerView-

public class ExampleAdapter extends RecyclerView.Adapter<ExampleViewHolder> {

    private final LayoutInflater mInflater;
    private final List<ExampleModel> mModels;

    public ExampleAdapter(Context context, List<ExampleModel> models) {
        mInflater = LayoutInflater.from(context);
        mModels = new ArrayList<>(models);
    }

    @Override
    public ExampleViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        final View itemView = mInflater.inflate(R.layout.it_file, parent, false);
        return new ExampleViewHolder(itemView);
    }

    @Override
    public void onBindViewHolder(ExampleViewHolder holder, int position) {
        final ExampleModel model = mModels.get(position);
        holder.bind(model);
    }

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

    public void animateTo(List<ExampleModel> models) {
        applyAndAnimateRemovals(models);
        applyAndAnimateAdditions(models);
        applyAndAnimateMovedItems(models);
    }

    private void applyAndAnimateRemovals(List<ExampleModel> newModels) {
        for (int i = mModels.size() - 1; i >= 0; i--) {
            final ExampleModel model = mModels.get(i);
            if (!newModels.contains(model)) {
                removeItem(i);
            }
        }
    }

    private void applyAndAnimateAdditions(List<ExampleModel> newModels) {
        for (int i = 0, count = newModels.size(); i < count; i++) {
            final ExampleModel model = newModels.get(i);
            if (!mModels.contains(model)) {
                addItem(i, model);
            }
        }
    }

    private void applyAndAnimateMovedItems(List<ExampleModel> newModels) {
        for (int toPosition = newModels.size() - 1; toPosition >= 0; toPosition--) {
            final ExampleModel model = newModels.get(toPosition);
            final int fromPosition = mModels.indexOf(model);
            if (fromPosition >= 0 && fromPosition != toPosition) {
                moveItem(fromPosition, toPosition);
            }
        }
    }

    public ExampleModel removeItem(int position) {
        final ExampleModel model = mModels.remove(position);
        notifyItemRemoved(position);
        return model;
    }

    public void addItem(int position, ExampleModel model) {
        mModels.add(position, model);
        notifyItemInserted(position);
    }

    public void moveItem(int fromPosition, int toPosition) {
        final ExampleModel model = mModels.remove(fromPosition);
        mModels.add(toPosition, model);
        notifyItemMoved(fromPosition, toPosition);
    }
}

如果用户单击一个"，则我希望它也可以对两个和三个执行某项操作.我如何实现这一目标?

if the user clicks on One, I want it to do something,also for two and three. How do i get achieve this?

推荐答案

您可以将onClickListener绑定到itemView，如下所示:

You can bind the onClickListener to itemView, like this:

@Override
public void onBindViewHolder(ExampleViewHolder holder, int position) {
    final ExampleModel model = mModels.get(position);
    holder.bind(model);
    holder.itemView.setOnClickListener( ... {

        if(position == 1){
            ...
        }else{
            ...
        }

    });
}

或在ExampleViewHolder.bind()中进行操作，则可以像position一样将参数传递给它.

or do it in ExampleViewHolder.bind(), then you can pass an argument to it like position.

这篇关于项目单击以进入回收站视图的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！