如何用searchview正确过滤RecyclerView

Question

大家好，我在RecyclerView中实现了SearchView，但当我搜索字符名称时，它不会搜索任何名称，我遵循了本教程

在我的适配器类下面，我用可过滤

公共类LeovegasAdapter扩展了RecyclerView。Adapter实现了Filterable｛

private List<Hero> heros;
private List<Hero> filtarableList;
public LeovegasAdapter(List<Hero> heros) {
this.heros = heros;
filtarableList = filtarableList;
}
@Override
public CustomViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.hero_list, parent, false);
return new CustomViewHolder(itemView);
}
@Override
public void onBindViewHolder(CustomViewHolder holder, int position) {
Hero hero = heros.get(position);
holder.heroId.setText(hero.getId());
holder.heroName.setText(hero.getName());
}
@Override
public int getItemCount() {
return heros.size();
}

@Override
public Filter getFilter() {
return new Filter() {
@Override
protected FilterResults performFiltering(CharSequence charSequence) {
String charString = charSequence.toString();
if (charString.isEmpty()) {
filtarableList = heros;
} else {
ArrayList<Hero> filteredList = new ArrayList<>();
for (Hero hero : heros) {
if (hero.getId().toLowerCase().contains(charString) || hero.getName().toLowerCase().contains(charString)) {
filteredList.add(hero);
}
}
filtarableList = filteredList;
}
FilterResults filterResults = new FilterResults();
filterResults.values = filtarableList;
return filterResults;
}
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
filtarableList = (List<Hero>) results.values;
notifyDataSetChanged();
}
};
}
public class CustomViewHolder extends RecyclerView.ViewHolder {
public TextView heroId, heroName;
public CustomViewHolder(View view) {
super(view);
heroId = (TextView) view.findViewById(R.id.heroId);
heroName = (TextView) view.findViewById(R.id.heroName);

}
}

}

在我的MainActivity.java下方

public class MainActivity extends AppCompatActivity {

public LeovegasAdapter leovegasAdapter;

public static final String publicKey = "4089ee37331d8211b080b047c58f6970";
public static final String privateKey = "18ccbcb58fdd12c22821f8b633a06f2b433d16c3";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);


LeoVegasInterface leoVegasInterface = LeoVegasClient.getApiService();
String ts = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss").format(new Date());
String hash = Hasher.md5(ts + privateKey + publicKey);
Call<LeoVegas> callHeroes = leoVegasInterface.getHeroes(ts, publicKey, hash);
callHeroes.enqueue(new Callback<LeoVegas>() {
@Override
public void onResponse(Call<LeoVegas> call, Response<LeoVegas> response) {
LeoVegas leoVegas = response.body();
Data data = leoVegas.getData();
Hero[] heroes = data.getResults();
RecyclerView recyclerView = (RecyclerView)findViewById(R.id.recycler_view);
leovegasAdapter = new LeovegasAdapter(Arrays.asList(heroes));
RecyclerView.LayoutManager eLayoutManager = new LinearLayoutManager(getApplicationContext());
recyclerView.setLayoutManager(eLayoutManager);
recyclerView.setAdapter(leovegasAdapter);
}
@Override
public void onFailure(Call<LeoVegas> call, Throwable t) {
}
});


}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
MenuItem search = menu.findItem(R.id.search);
SearchView searchView = (SearchView) MenuItemCompat.getActionView(search);
search(searchView);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
return super.onOptionsItemSelected(item);
}
private void search(SearchView searchView) {
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
@Override
public boolean onQueryTextSubmit(String query) {
return false;
}
@Override
public boolean onQueryTextChange(String newText) {
leovegasAdapter.getFilter().filter(newText);
return true;
}
});
}
}

Answer 1

更改以下代码

几乎没有变化

• 清除列表

• 使用addAll填充结果

  public Filter getFilter() {
  return new Filter() {
  @Override
  protected FilterResults performFiltering(CharSequence charSequence) {
  //Updated code
  String charString = charSequence.toString();
  ArrayList<Hero> filteredList = new ArrayList<>();
  if (charString.isEmpty()) {
  filteredList.addAll(filtarableList);
  } else {
  ArrayList<Hero> filteredList = new ArrayList<>();
  for (Hero hero : heros) {
  if (hero.getId().toLowerCase().contains(charString) || hero.getName().toLowerCase().contains(charString)) {
  filteredList.add(hero);
  }
  }
  }
  FilterResults filterResults = new FilterResults();
  filterResults.values = filteredList;
  return filterResults;
  }
  @Override
  protected void publishResults(CharSequence constraint, FilterResults results) {
  //Update code
  heros.clear();
  if (results == null)
  heros.addAll(mFilterConversations);
  else {
  heros.addAll((List<Hero>) results.values);
  }
  notifyDataSetChanged();
  }
  };
  }