Использую RecyclerView для отображения списка с элементами. Хочу реализовать поиск по этому способу, желательно наиболее простым и действенным способом. Не смог разобраться в тех примерах что нашел в интернете, т.к. сложны для меня (я пока что новичок).
Элемент списка:
RecyclerViewAdapter:
package com.starikov.definitions.adapters;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import android.widget.TextView;
import com.starikov.definitions.MainActivity;
import com.starikov.definitions.R;
public class RecyclerViewAdapter extends RecyclerView.Adapter{
private int[] textId;
public static class ViewHolder extends RecyclerView.ViewHolder{
private LinearLayout mLinearLayout;
public ViewHolder(LinearLayout v){
super(v);
mLinearLayout = v;
}
}
public RecyclerViewAdapter(int[] textId){
this.textId = textId;
}
@Override
public RecyclerViewAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
LinearLayout cv = (LinearLayout) LayoutInflater.from(parent.getContext()).inflate(R.layout.definition, parent, false);
return new ViewHolder(cv);
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
float textSize;
LinearLayout linearLayout = holder.mLinearLayout;
TextView textView = linearLayout.findViewById(R.id.textId);
textSize = MainActivity.sharedPreferences.getFloat(MainActivity.APP_PREFERENCES_TEXT_SIZE, 15);
textView.setTextSize(textSize);
textView.setText(linearLayout.getResources().getText(textId[position]));
}
@Override
public int getItemCount() {
return textId.length;
}
}
Фрагмент со списком RecyclerView
package com.starikov.definitions;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.starikov.definitions.adapters.RecyclerViewAdapter;
import com.starikov.definitions.definitions.Geometry;
public class GeometryDefinitionFragment extends Fragment {
private static int themePosition;
private int[] definitionTexts;
int formulaId = 0;
public static void setChoosedTheme(int position){
themePosition = position;
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
RecyclerView formulaRecycler = (RecyclerView) inflater.inflate(R.layout.himical_definition_fragment, container, false);
switch (themePosition){
case 0:
definitionTexts = new int[Geometry.ugli.length];
for (int i = 0; i < Geometry.ugli.length; ++i) {
definitionTexts[formulaId] = Geometry.ugli[i].getTextId();
formulaId++;
}
getActivity().setTitle("Углы");
break;
case 1:
definitionTexts = new int[Geometry.parallenie_pryamie.length];
for (int i = 0; i < Geometry.parallenie_pryamie.length; ++i) {
definitionTexts[formulaId] = Geometry.parallenie_pryamie[i].getTextId();
formulaId++;
}
getActivity().setTitle("Параллельные прямые");
break;
case 2:
definitionTexts = new int[Geometry.treugolniki.length];
for (int i = 0; i < Geometry.treugolniki.length; ++i) {
definitionTexts[formulaId] = Geometry.treugolniki[i].getTextId();
formulaId++;
}
getActivity().setTitle("Треугольники");
break;
case 3:
definitionTexts = new int[Geometry.pryamoygolnii_treugolnik.length];
for (int i = 0; i < Geometry.pryamoygolnii_treugolnik.length; ++i) {
definitionTexts[formulaId] = Geometry.pryamoygolnii_treugolnik[i].getTextId();
formulaId++;
}
getActivity().setTitle("Прямоугольный треугольник");
break;
case 4:
definitionTexts = new int[Geometry.gmt.length];
for (int i = 0; i < Geometry.gmt.length; ++i) {
definitionTexts[formulaId] = Geometry.gmt[i].getTextId();
formulaId++;
}
getActivity().setTitle("Геометрические места точек");
break;
case 5:
definitionTexts = new int[Geometry.gomotetia.length];
for (int i = 0; i < Geometry.gomotetia.length; ++i) {
definitionTexts[formulaId] = Geometry.gomotetia[i].getTextId();
formulaId++;
}
getActivity().setTitle("Геометрические места точек");
break;
case 6:
definitionTexts = new int[Geometry.chetirehugolnik.length];
for (int i = 0; i < Geometry.chetirehugolnik.length; ++i) {
definitionTexts[formulaId] = Geometry.chetirehugolnik[i].getTextId();
formulaId++;
}
getActivity().setTitle("Четырехугольники");
break;
}
RecyclerViewAdapter adapter = new RecyclerViewAdapter(definitionTexts);
formulaRecycler.setAdapter(adapter);
LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity());
formulaRecycler.setLayoutManager(layoutManager);
return formulaRecycler;
}
@Override
public void onResume() {
super.onResume();
MainActivity.lastOpenedFragment = new GeometryDefinitionFragment();
MainActivity.genometryDefinitionFrag = true;
}
@Override
public void onPause() {
super.onPause();
MainActivity.genometryDefinitionFrag = false;
}
}
В нем я получаю id с предыдущего фрагмента и для каждого id заполняю список разными элемнтами.
Класс Geometry
package com.starikov.definitions.definitions;
import com.starikov.definitions.R;
public class Geometry {
private int textId;
public static final Geometry[] ugli = {
new Geometry(R.string.ugol),
new Geometry(R.string.razvernutii_ugol),
new Geometry(R.string.pryamim_uglom),
new Geometry(R.string.ostrim),
new Geometry(R.string.tupim),
new Geometry(R.string.smejnie),
new Geometry(R.string.gradus),
new Geometry(R.string.ravnimi),
new Geometry(R.string.bissektrisa),
new Geometry(R.string.vertical),
new Geometry(R.string.uglom_mejdu_dvumya_peresekauch_praymamim),
new Geometry(R.string.perpendikular),
};
public static final Geometry[] parallenie_pryamie = {
new Geometry(R.string.parallelnie_pryamie),
new Geometry(R.string.teorema_suh_paral_pryamih),
new Geometry(R.string.aksioma_paral_pryamih),
new Geometry(R.string.sledstvie),
new Geometry(R.string.parallelnie_pryamie_ugli),
new Geometry(R.string.priznaki_parallelnosti_dvuh_prymih),
new Geometry(R.string.svoistva_uglov_paral_pr),
new Geometry(R.string.teorema_faleca),
new Geometry(R.string.rashrir_faleca),
};
public static final Geometry[] treugolniki = {
new Geometry(R.string.treugolnik),
new Geometry(R.string.uglom_treugolnika),
new Geometry(R.string.vidi_treugolnikov),
new Geometry(R.string.perimetr),
new Geometry(R.string.sootnoshenie_ejdu_storonami_i_uglami_treugolnika),
new Geometry(R.string.vneshnim),
new Geometry(R.string.ravnimi__),
new Geometry(R.string.priznaki_ravenstva_treugolnikov),
new Geometry(R.string.srednyaya_linia),
new Geometry(R.string.mediana),
new Geometry(R.string.bissektrisa__),
new Geometry(R.string.visota),
new Geometry(R.string.svoistvo_srednei_linii_treugolnika),
new Geometry(R.string.bissektrisa_ravnobedr),
new Geometry(R.string.chetire_zamechatelnie_tochki_treugolnika),
new Geometry(R.string.svoistva_median_treugolnika),
new Geometry(R.string.reshit_treugolnik),
};
public static final Geometry[] pryamoygolnii_treugolnik = {
new Geometry(R.string.pryamougolnii_treugolnik),
new Geometry(R.string.gipotenuza),
new Geometry(R.string.kateti),
new Geometry(R.string.swoistvo_mediani_provedennoi_na_gipotenuzu),
new Geometry(R.string.priznaki_ravenstva_pryamougolnih_treugolnikov),
new Geometry(R.string.v_pryamougolnom_treugolnike),
new Geometry(R.string.teorema_pifagora),
new Geometry(R.string.obratnaya_teorema_pifagora),
new Geometry(R.string.teorema_kosinusov),
new Geometry(R.string.teorema_sinusov),
};
public static final Geometry[] gmt = {
new Geometry(R.string.gmt),
new Geometry(R.string.okrujnost),
new Geometry(R.string.seredinnii_perpendikular),
new Geometry(R.string.sovokupnost_dvuh_pryamih_parallelnoih_dannoi),
new Geometry(R.string.parallelnaya_im_pruyamaya),
new Geometry(R.string.sovokupnost_dvuh_pryamih),
new Geometry(R.string.sovokupnost_dvuh_segmentov_bez_ih_konsov),
};
public static final Geometry[] gomotetia = {
new Geometry(R.string.gomotetia),
new Geometry(R.string.preobrazovanie_podobia),
new Geometry(R.string.podobnimi),
new Geometry(R.string.sushestvovanie_podobnih_treugolnikov),
new Geometry(R.string.svoistvo_preobrazovania_podobia),
new Geometry(R.string.priznaki_podobia_treugolnikov),
new Geometry(R.string.v_podobnih_treugolnikah),
};
public static final Geometry[] chetirehugolnik = {
new Geometry(R.string.chetirehugolnik),
new Geometry(R.string.vershini_i_storoni),
new Geometry(R.string.sosednie_protivoleshahie),
new Geometry(R.string.sosednie_smejnie),
new Geometry(R.string.diagonal),
new Geometry(R.string.vipuklim),
new Geometry(R.string.uglom),
new Geometry(R.string.sosednie_protivoleshahie_ugli),
new Geometry(R.string.svoistvo_uglov_vipuklogo_chetirehugolnika),
new Geometry(R.string.perimetr___),
new Geometry(R.string.svoistva_parallelograma),
new Geometry(R.string.priznaki_parallelograma),
new Geometry(R.string.pryamougolnik),
new Geometry(R.string.svoistva_pryamougolnika),
new Geometry(R.string.priaznaki_pryamougolnika),
new Geometry(R.string.romb),
new Geometry(R.string.svoistva_romba),
new Geometry(R.string.prizanki_romba),
new Geometry(R.string.kvadrat),
new Geometry(R.string.svoistva_kvadrata),
new Geometry(R.string.prizmnaki_kvadrata),
new Geometry(R.string.eche_dva_prianaka_kvadrata),
new Geometry(R.string.trapecia),
new Geometry(R.string.osnovanie_trapecii),
new Geometry(R.string.srednyaya_linia_trapecii),
new Geometry(R.string.diagonal_trapecii),
new Geometry(R.string.visota_trapecii),
new Geometry(R.string.svoistva_trapecii),
new Geometry(R.string.ravnobokoi_rapeciei),
new Geometry(R.string.pryamougolnoi_trapeciei),
new Geometry(R.string.svoistva_ravnobokoi_trapecii),
};
private Geometry(int textId){
this.textId = textId;
}
public int getTextId(){
return textId;
}
}
Прошу помощи, т.к. сам не разобрался.
Ответ
Разобрался, сделал:
activity_main.xml
Тут макет для RecyclerView
android:scrollbarThumbVertical="@drawable/scrollview_thumb"
и
android:scrollbarTrackVertical="@drawable/vertical_scrollview_track"
мои собственные макеты для полосы прокрутки (можно убрать, можно заменить своими)
MainActivity
package com.starikov.search;
import android.os.Bundle;
import android.support.v4.view.MenuItemCompat;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.SearchView;
import android.view.Menu;
import android.view.MenuItem;
import java.util.ArrayList;
import java.util.Arrays;
public class MainActivity extends AppCompatActivity {
private RecyclerView mRecyclerView;
private ArrayList mArrayList = new ArrayList(Formula.physicalFormuls.length);
private RecyclerViewAdapter mAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mRecyclerView = findViewById(R.id.formula_recycler);
mRecyclerView.setHasFixedSize(true);
RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(this);
mRecyclerView.setLayoutManager(layoutManager);
mArrayList = setArray(mArrayList); // Заполняем список
mAdapter = new RecyclerViewAdapter(mArrayList); // Создаем адаптер
mRecyclerView.setAdapter(mAdapter); // Подключаем адаптер
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main_menu, menu);
MenuItem search = menu.findItem(R.id.search); // Подключаем SearchView
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) {
mAdapter.getFilter().filter(query);
return false;
}
@Override
public boolean onQueryTextChange(String newText) {
mAdapter.getFilter().filter(newText);
return true;
}
});
}
private ArrayList setArray(ArrayList list) { // Заполняю ArrayList готовым списком из класса Formula
list.addAll(Arrays.asList(Formula.physicalFormuls));
return list;
}
}
main_menu.xml
Formula.java
package com.starikov.search;
public class Formula {
private String name;
private int imageId;
public Formula(String name, int imageId){
this.name = name;
this.imageId = imageId;
}
public static final Formula[] physicalFormuls = { // Текст по которому будет вестись поиск, и картинка которую ищем
new Formula("закон движения", R.drawable.formul_zakon_dvijenia),
new Formula("координатные уравнения движения", R.drawable.formul_koordinatnie_uravneniya_dvigenia),
new Formula("перемещение точки тела",R.drawable.formul_peremechenie),
....
};
public String getName(){
return name;
}
public int getImageId(){
return imageId;
}
public String toString() {
return this.name;
}
}
card_view.xml (макет для элемента списка)
RecyclerViewAdapter.java
package com.starikov.search;
import android.support.v7.widget.CardView;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.ViewGroup;
import android.widget.Filter;
import android.widget.Filterable;
import android.widget.ImageView;
import java.util.ArrayList;
public class RecyclerViewAdapter extends RecyclerView.Adapter implements Filterable{
private ArrayList mArrayList = new ArrayList<>();
private ArrayList mFilteredList = new ArrayList<>();
@Override
public Filter getFilter() {
return new Filter() {
@Override
protected FilterResults performFiltering(CharSequence charSequence) {
String charString = charSequence.toString();
if (charString.isEmpty()) {
mFilteredList = mArrayList;
} else {
ArrayList filteredList = new ArrayList<>();
for (Formula formula : mArrayList) {
if (formula.getName().toLowerCase().contains(charString)) { // Сортируем по тексту из Formula
filteredList.add(formula);
}
}
mFilteredList = filteredList;
}
FilterResults filterResults = new FilterResults();
filterResults.values = mFilteredList;
return filterResults;
}
@Override
protected void publishResults(CharSequence charSequence, FilterResults filterResults) {
mFilteredList = (ArrayList) filterResults.values;
notifyDataSetChanged();
}
};
}
public static class ViewHolder extends RecyclerView.ViewHolder{
private CardView mCardView;
private ImageView imageView;
public ViewHolder(CardView v){
super(v);
mCardView = v;
imageView = v.findViewById(R.id.info_image);
}
}
public RecyclerViewAdapter(ArrayList arrayList){
mArrayList = arrayList;
mFilteredList = arrayList;
}
@Override
public RecyclerViewAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
CardView cv = (CardView) LayoutInflater.from(parent.getContext()).inflate(R.layout.card_view, parent, false);
return new ViewHolder(cv);
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
holder.imageView.setImageDrawable(holder.mCardView.getResources().getDrawable(mFilteredList.get(position).getImageId()));
holder.imageView.setContentDescription(mFilteredList.get(position).getName());
}
@Override
public int getItemCount() {
return mFilteredList.size();
}
}
в Gradle зависимости для CardView и RecyclerView
compile 'com.android.support:recyclerview-v7:26.1.0'
implementation 'com.android.support:cardview-v7:26.1.0'
Буду рад советам как улучшить код!
