Почему RecyclerView нормально работает в апи 21 и не работает в апи 28-29 (другие не проверял)?

Question

[Neonoviiwolf]

Доброго.
Странная вещь, в эмуляторе апи 21 RecyclerView ведёт себя корректно, но в других он не выводит список на экран, хотя происходит вызов notifyDataSetChanged
код адаптера

package com.example.weather.app.adapter.recyclerView;

import android.app.Activity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;

import com.example.weather.R;
import com.example.weather.eventBus.ClickItemRecyclerView;

import org.greenrobot.eventbus.EventBus;

import java.util.List;

public class AdapterFindCity extends RecyclerView.Adapter<AdapterFindCity.ViewHolder> {

    public static class ViewHolder extends RecyclerView.ViewHolder {

        private TextView nameEnCity, country;
        private LinearLayout layout;

        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            layout = itemView.findViewById(R.id.find_city_layout);
            nameEnCity = itemView.findViewById(R.id.tv_name_en_city_adapter);
            country = itemView.findViewById(R.id.tv_country_adapter);
        }
    }

    private List<ItemAdapterFindCity> list;

    public AdapterFindCity(List<ItemAdapterFindCity> list) {
        this.list = list;
    }

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

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        ItemAdapterFindCity item = list.get(position);
        holder.country.setText(item.getCountry().trim());
        if (item.getNameCityEN() != null)
            holder.nameEnCity.setText(item.getNameCityEN().trim());
        holder.layout.setOnClickListener(view -> {
            EventBus.getDefault().post(new ClickItemRecyclerView(list.get(position).getIdWeather()));
            ((Activity) holder.itemView.getContext()).finish();
        });
    }

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

вот автивити

package com.example.weather.app.activities.findCity.view;

import android.os.Bundle;
import android.view.View;
import android.widget.TextView;

import androidx.appcompat.widget.SearchView;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import com.arellomobile.mvp.MvpAppCompatActivity;
import com.arellomobile.mvp.presenter.InjectPresenter;
import com.example.weather.R;
import com.example.weather.app.activities.findCity.presenter.PresenterFindCity;
import com.example.weather.app.adapter.recyclerView.AdapterFindCity;
import com.example.weather.app.adapter.recyclerView.ItemAdapterFindCity;
import com.google.android.flexbox.FlexboxLayout;

import java.util.List;

import butterknife.BindView;
import butterknife.ButterKnife;
import butterknife.OnClick;

public class FindCity extends MvpAppCompatActivity implements ViewFindCity {

    @InjectPresenter
    PresenterFindCity presenter;

    @BindView(R.id.flex_box_container) FlexboxLayout flexboxContainer;

    @BindView(R.id.recycler_list_city) RecyclerView recyclerViewCity;

    @BindView(R.id.sw_city) SearchView searchView;
    @BindView(R.id.tv_popular_cities) TextView tvPopularCities;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.find_city);
        ButterKnife.bind(this);
        RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(this);
        recyclerViewCity.setLayoutManager(layoutManager);
        recyclerViewCity.setHasFixedSize(false);

        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
            @Override
            public boolean onQueryTextSubmit(String query) {
//                presenter.setTextSearch(query);
                return false;
            }

            @Override
            public boolean onQueryTextChange(String newText) {
                presenter.setTextSearch(newText);
                return false;
            }
        });
    }

    private AdapterFindCity adapterFindCity;
/**сюда приходит ссылка на array*/
    @Override
    public void updateRecyclerView(List<ItemAdapterFindCity> cityList) {
        if (recyclerViewCity.getVisibility() == View.GONE) {
            flexboxContainer.setVisibility(View.GONE);
            tvPopularCities.setVisibility(View.GONE);
            recyclerViewCity.setVisibility(View.VISIBLE);
            adapterFindCity = new AdapterFindCity(cityList);
            recyclerViewCity.setAdapter(adapterFindCity);
        }
        adapterFindCity.notifyDataSetChanged();
    }

//    @OnClick(R.id.btn_search_city)
//    public void SearchCity() {
////        presenter.
//    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        ButterKnife.bind(this).unbind();
        presenter.disposable();
    }
}

Answer 1

[Neonoviiwolf]

Странная фигня, в общем если написать разметку так

android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/flex_box_container"
        app:layout_constraintVertical_bias="0.0">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical">

            <androidx.recyclerview.widget.RecyclerView
                android:id="@+id/recycler_list_city"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_margin="8dp"
                android:paddingTop="16dp"
                android:visibility="gone" />
        </LinearLayout>
    </androidx.core.widget.NestedScrollView>

то работает

Comments

[Денис Загаевский]

зачем всё это?