安卓。RecyclerView项目搜索

我RecyclerView用来显示包含项目的列表。我想使用这种方法实现搜索，最好以最简单和最有效的方式。我无法理解我在互联网上找到的那些例子，tk。对我来说很难（我还是个初学者）。
项目清单：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    xmlns:android="http://schemas.android.com/apk/res/android">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/textId"
        android:padding="@dimen/activity_horizontal_margin"/>

    <View
        android:layout_width="fill_parent"
        android:layout_height="1dp"
        android:id="@+id/separator"
        android:visibility="visible"
        android:background="@color/poloska_spiska"/>
</LinearLayout>

回收器视图适配器：

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<RecyclerViewAdapter.ViewHolder>{

    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;
    }
}

列表片段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;
    }
}

在其中，我从前一个片段中获取 id，并且对于每个 id，我用不同的元素填充列表。

几何类

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;
    }
}

我寻求帮助，因为 我自己没有弄清楚。