当SearchView过滤器结果显示在RecyclerView中时如何获取正确的项目

Question

我的活动中有一个RecyclerView和一个SearchView。SearchView通过过滤{{1}来按预期更新RecyclerView }，但是RecyclerView不会更新，如果在过滤结果后单击第一个列表项，则get(position) RecyclerView会触发列表中的第一项。

我的活动如下：

onClick

我的适配器类

public class MangalStuti extends AppCompatActivity implements SearchView.OnQueryTextListener {
private List<Name> movieList = new ArrayList<>();
private RecyclerView recyclerView;
 //  EditText editTextSearch;
//  ArrayList<String> names;
private Adapter mAdapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.mangal_stuti_activity);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    recyclerView = (RecyclerView) findViewById(R.id.recycler_view);
   // editTextSearch = (EditText) findViewById(R.id.editTextSearch);

    mAdapter = new Adapter(movieList);
    RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(getApplicationContext());
    recyclerView.setLayoutManager(mLayoutManager);
    recyclerView.setItemAnimator(new DefaultItemAnimator());
    recyclerView.setAdapter(mAdapter);


    // row click listener
    recyclerView.addOnItemTouchListener(new RecyclerTouchListener(getApplicationContext(), recyclerView, new RecyclerTouchListener.ClickListener() {

        @Override
        public void onClick(View view, int position) {
            Name name = movieList.get(position);
            String text = name.getTitle();
            Toast.makeText(getApplicationContext(), text + " is selected!", Toast.LENGTH_SHORT).show();
            if (text == "Apple"){
                view.getContext().startActivity(new Intent(view.getContext(),Apple.class));
            }
            if (text == "Tiger"){
                view.getContext().startActivity(new Intent(view.getContext(),Animal.class));
            }
        }

        @Override
        public void onLongClick(View view, int position) {

        }
    }));

    prepareMovieData();
}

private void prepareMovieData() {
    Name movie = new Name("Apple", "Fruit", "2018");
    movieList.add(movie);

    movie = new Name("Tiger", "Animal", "2018");
    movieList.add(movie);

    movie = new Name("Paris", "Place", "2018");
    movieList.add(movie);



    mAdapter.notifyDataSetChanged();
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.menu,menu);
    MenuItem menuItem=menu.findItem(R.id.actionsearch);
    SearchView searchView=(SearchView) MenuItemCompat.getActionView(menuItem);
    searchView.setOnQueryTextListener(this);
    return super.onCreateOptionsMenu(menu);
}


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

@Override
public boolean onQueryTextChange(String newText) {
    newText=newText.toLowerCase();
    ArrayList<Name> newlist=new ArrayList<>();
    for(Name name:movieList)
    {
        String getName=name.getTitle().toLowerCase();
        if(getName.contains(newText)){
            newlist.add(name);

        }
    }
    mAdapter.filter(newlist);
    return true;
}
}

名称类别

public class Adapter extends RecyclerView.Adapter <Adapter.MyViewHolder>{

private List<Name> movieList;
private ArrayList<Name> arraylist;

public class MyViewHolder extends RecyclerView.ViewHolder {
    public TextView title, year, genre;

    public MyViewHolder(View view) {
        super(view);
        title = (TextView) view.findViewById(R.id.title);
        genre = (TextView) view.findViewById(R.id.genre);
        year = (TextView) view.findViewById(R.id.year);
    }

}

public Adapter(List<Name> movieList) {
    this.movieList = movieList;
    this.arraylist = new ArrayList<Name>();
    this.arraylist.addAll(movieList);
}

@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View view= LayoutInflater.from(parent.getContext()).inflate(R.layout.movie_list_row,parent,false);
    return new MyViewHolder(view);
}

@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
    Name name = movieList.get(position);
    holder.title.setText(name.getTitle());
    holder.genre.setText(name.getGenre());
    holder.year.setText(name.getYear());

}

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

public void filter(ArrayList<Name> newList)
{
    movieList=new ArrayList<>();
    movieList.addAll(newList);
    notifyDataSetChanged();
}
}

Answer 1

在如下所示的适配器类中创建方法

public List<Name> getMovieList(){
  return movieList;
}

然后使用下面的代码来获取所选的电影

 // row click listener
    recyclerView.addOnItemTouchListener(new RecyclerTouchListener(getApplicationContext(), recyclerView, new RecyclerTouchListener.ClickListener() {

        @Override
        public void onClick(View view, int position) {
            Name name = mAdapter.getMovieList().get(position); // Important one
            String text = name.getTitle();
            Toast.makeText(getApplicationContext(), text + " is selected!", Toast.LENGTH_SHORT).show();
            if (text == "Apple"){
                view.getContext().startActivity(new Intent(view.getContext(),Apple.class));
            }
            if (text == "Tiger"){
                view.getContext().startActivity(new Intent(view.getContext(),Animal.class));
            }
        }

        @Override
        public void onLongClick(View view, int position) {

        }
    }));