У меня возникли некоторые проблемы при попытке добавить массив городов в каждое местоположение элемента в моем списке фрагментов. Я создал шаблон фиктивного списка для своего фрагмента, но не могу найти в Интернете ничего о том, как сохранить значения в моем массиве в файле Strings. xml в значениях внутри представления переработчика. Я хочу заменить фиктивные элементы (например, 1: элемент 1, 2: элемент 2 и т. Д. c.) На названия городов в моем массиве. пожалуйста помогите !!!
xml файл:
<resources>
<string-array name="Cities">
<item>Vancouver</item>
<item>Kamloops</item>
<item>Edmonton</item>
<item>Calgary</item>
<item>Winnipeg</item>
<item>Toronto</item>
<item>Montreal</item>
</string-array>
</resources>
Фрагмент файла:
package com.example.fragments;
import android.content.Context;
import android.os.Bundle;
import androidx.fragment.app.Fragment;
import androidx.recyclerview.widget.GridLayoutManager;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.example.fragments.dummy.DummyContent;
import com.example.fragments.dummy.DummyContent.DummyItem;
import java.util.List;
/**
* A fragment representing a list of Items.
* <p/>
* Activities containing this fragment MUST implement the {@link OnListFragmentInteractionListener}
* interface.
*/
public class citiesFragment extends Fragment {
// TODO: Customize parameter argument names
private static final String ARG_COLUMN_COUNT = "column-count";
// TODO: Customize parameters
private int mColumnCount = 1;
private OnListFragmentInteractionListener mListener;
/**
* Mandatory empty constructor for the fragment manager to instantiate the
* fragment (e.g. upon screen orientation changes).
*/
public citiesFragment() {
}
// TODO: Customize parameter initialization
@SuppressWarnings("unused")
public static citiesFragment newInstance(int columnCount) {
citiesFragment fragment = new citiesFragment();
Bundle args = new Bundle();
args.putInt(ARG_COLUMN_COUNT, columnCount);
fragment.setArguments(args);
return fragment;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
mColumnCount = getArguments().getInt(ARG_COLUMN_COUNT);
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_cities_list, container, false);
// Set the adapter
if (view instanceof RecyclerView) {
Context context = view.getContext();
RecyclerView recyclerView = (RecyclerView) view;
if (mColumnCount <= 1) {
recyclerView.setLayoutManager(new LinearLayoutManager(context));
} else {
recyclerView.setLayoutManager(new GridLayoutManager(context, mColumnCount));
}
recyclerView.setAdapter(new MycitiesRecyclerViewAdapter(DummyContent.ITEMS, mListener));
}
return view;
}
@Override
public void onAttach(Context context) {
super.onAttach(context);
if (context instanceof OnListFragmentInteractionListener) {
mListener = (OnListFragmentInteractionListener) context;
} else {
throw new RuntimeException(context.toString()
+ " must implement OnListFragmentInteractionListener");
}
}
@Override
public void onDetach() {
super.onDetach();
mListener = null;
}
/**
* This interface must be implemented by activities that contain this
* fragment to allow an interaction in this fragment to be communicated
* to the activity and potentially other fragments contained in that
* activity.
* <p/>
* See the Android Training lesson <a href=
* "http://developer.android.com/training/basics/fragments/communicating.html"
* >Communicating with Other Fragments</a> for more information.
*/
public interface OnListFragmentInteractionListener {
// TODO: Update argument type and name
void onListFragmentInteraction(DummyItem item);
}
}
макет:
<androidx.recyclerview.widget.RecyclerView
xmlns:android="schemas.android.com/apk/res/android"
xmlns:app="schemas.android.com/apk/res-auto"
xmlns:tools="schemas.android.com/tools"
android:id="@+id/list"
android:name="com.example.fragments.citiesFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
app:layoutManager="LinearLayoutManager"
tools:context=".citiesFragment"
tools:listitem="@layout/fragment_cities" />
Файл адаптера :
/**
* {@link RecyclerView.Adapter} that can display a {@link DummyItem} and makes a call to the
* specified {@link OnListFragmentInteractionListener}.
* TODO: Replace the implementation with code for your data type.
*/
public class MycitiesRecyclerViewAdapter extends RecyclerView.Adapter<MycitiesRecyclerViewAdapter.ViewHolder> {
private final List<DummyItem> mValues;
private final OnListFragmentInteractionListener mListener;
public MycitiesRecyclerViewAdapter(List<DummyItem> items, OnListFragmentInteractionListener listener) {
mValues = items;
mListener = listener;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext())
.inflate(R.layout.fragment_cities, parent, false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(final ViewHolder holder, int position) {
holder.mItem = mValues.get(position);
holder.mIdView.setText(mValues.get(position).id);
holder.mContentView.setText(mValues.get(position).content);
holder.mView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (null != mListener) {
// Notify the active callbacks interface (the activity, if the
// fragment is attached to one) that an item has been selected.
mListener.onListFragmentInteraction(holder.mItem);
}
}
});
}
@Override
public int getItemCount() {
return mValues.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
public final View mView;
public final TextView mIdView;
public final TextView mContentView;
public DummyItem mItem;
public ViewHolder(View view) {
super(view);
mView = view;
mIdView = (TextView) view.findViewById(R.id.item_number);
mContentView = (TextView) view.findViewById(R.id.content);
}
@Override
public String toString() {
return super.toString() + " '" + mContentView.getText() + "'";
}
}
}
файл фиктивного содержимого:
/**
* Вспомогательный класс для предоставления примера содержимого для пользовательских интерфейсов, созданных * Android мастерами шаблонов. *
* TODO: замените все использования этого класса перед публикацией вашего приложения. * / publi c class DummyContent {
/**
* An array of sample (dummy) items.
*/
public static final List<DummyItem> ITEMS = new ArrayList<DummyItem>();
/**
* A map of sample (dummy) items, by ID.
*/
public static final Map<String, DummyItem> ITEM_MAP = new HashMap<String, DummyItem>();
private static final int COUNT = 25;
static {
// Add some sample items.
for (int i = 1; i <= COUNT; i++) {
addItem(createDummyItem(i));
}
}
private static void addItem(DummyItem item) {
ITEMS.add(item);
ITEM_MAP.put(item.id, item);
}
private static DummyItem createDummyItem(int position) {
return new DummyItem(String.valueOf(position), "Item " + position, makeDetails(position));
}
private static String makeDetails(int position) {
StringBuilder builder = new StringBuilder();
builder.append("Details about Item: ").append(position);
for (int i = 0; i < position; i++) {
builder.append("\nMore details information here.");
}
return builder.toString();
}
/**
* A dummy item representing a piece of content.
*/
public static class DummyItem {
public final String id;
public final String content;
public final String details;
public DummyItem(String id, String content, String details) {
this.id = id;
this.content = content;
this.details = details;
}
@Override
public String toString() {
return content;
}
}
}