Recyclerview

STEP1: Add dependencies to gradle

    implementation 'com.android.support:appcompat-v7:28.0.0'
	implementation 'com.android.support:recyclerview-v7:28.0.0'

STEP2: Create activity layout - activity_main.xml

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

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recyclerId"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>
</RelativeLayout>

STEP3: Create row layout sample_list_row.xml

 <?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:padding="10dp"
    android:background="@drawable/custom_ripple" >

    <ImageView
        android:id="@+id/tvImage"
        android:layout_width="65dp"
        android:layout_height="50dp"
        android:src="@mipmap/ic_launcher"
        android:layout_gravity="center"/>

    <TextView
        android:id="@+id/tvText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="20sp"
        android:layout_gravity="center"
        android:padding="10dp"/>
</LinearLayout>

STEP4: Create menu folder in the menu folder create menu resource file - search_menu.xml

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

    <!--item for our search view with its id-->
    <item
        android:id="@+id/action_search"
        android:icon="@android:drawable/ic_menu_search"
        android:title="Search"
        app:actionViewClass="android.support.v7.widget.SearchView"
        app:showAsAction="ifRoom|collapseActionView"
        tools:ignore="MissingClass" />

</menu>

STEP5: Create the java class - MyRecyclerViewItemList.java

 package com.bdmztech.bdresults;

public class MyRecyclerViewItemList {
    private int imageResource;
    private String text1;
    private String url;

    public MyRecyclerViewItemList(int imageResource, String text1 ,String url) {
        this.imageResource = imageResource;
        this.text1 = text1;
        this.url = url;
    }

    public int getImageResource() {
        return imageResource;
    }

    public String getText1() {
        return text1;
    }

    public String getUrl() {
        return url;
    }
}

STEP6: Create the adapter - MyRecyclerViewAdapter.java

 package com.bdmztech.bdresults;

import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Filter;
import android.widget.Filterable;
import android.widget.ImageView;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.List;

public class MyRecyclerViewAdapter extends RecyclerView.Adapter<MyRecyclerViewAdapter.ViewHolder> implements Filterable {

    private List<MyRecyclerViewItemList> recyclerViewItemList;
    private List<MyRecyclerViewItemList> recyclerViewItemListFull;
    private ItemClickListener mClickListener;

    public MyRecyclerViewAdapter(List<MyRecyclerViewItemList> recyclerViewItemList) {
        this.recyclerViewItemList = recyclerViewItemList;
        recyclerViewItemListFull = new ArrayList<>(recyclerViewItemList);
    }



    // inflates the row layout from xml when needed
    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.recyclerview_row,
                parent, false);
        return new ViewHolder(view);
    }

    // binds the data to the TextView in each row
    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        MyRecyclerViewItemList currentItem = recyclerViewItemList.get(position);

        holder.myImageView.setImageResource(currentItem.getImageResource());
        holder.myTextView.setText(currentItem.getText1());

    }

    // total number of rows
    @Override
    public int getItemCount() {
        return recyclerViewItemList.size();
    }


    //serach filter code---
    @Override
    public Filter getFilter() {
        return filter;
    }

    private Filter filter = new Filter() {
        @Override
        protected FilterResults performFiltering(CharSequence constraint) {
            List<MyRecyclerViewItemList> filteredList = new ArrayList<>();

            if (constraint == null || constraint.length() == 0) {
                filteredList.addAll(recyclerViewItemListFull);
            } else {
                String filterPattern = constraint.toString().toLowerCase().trim();

                for (MyRecyclerViewItemList item : recyclerViewItemListFull) {
                    if (item.getText1().toLowerCase().contains(filterPattern)) {
                        filteredList.add(item);
                    }
                }
            }

            FilterResults results = new FilterResults();
            results.values = filteredList;

            return results;
        }

        @Override
        protected void publishResults(CharSequence constraint, FilterResults results) {
            recyclerViewItemList.clear();
            recyclerViewItemList.addAll((List) results.values);
            notifyDataSetChanged();
        }
    };


    // stores and recycles views as they are scrolled off screen
    public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
        TextView myTextView;
        ImageView myImageView;

        ViewHolder(View itemView) {
            super(itemView);
            myTextView = itemView.findViewById(R.id.tvText);
            myImageView = itemView.findViewById(R.id.tvImage);
            itemView.setOnClickListener(this);
        }

        @Override
        public void onClick(View view) {
            if (mClickListener != null) mClickListener.onItemClick(view, getAdapterPosition());
        }
    }

    // convenience method for getting data at click position
    MyRecyclerViewItemList getItem(int id) {

        return recyclerViewItemList.get(id);
    }


    // allows clicks events to be caught
    void setClickListener(ItemClickListener itemClickListener) {
        this.mClickListener = itemClickListener;
    }

    // parent activity will implement this method to respond to click events
    public interface ItemClickListener {
        void onItemClick(View view, int position);
    }
}

STEP7: Initialize RecyclerView in Activity - MainActivity.java

 package com.bdmztech.bdresults;

import android.content.Intent;
import android.support.annotation.NonNull;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.DividerItemDecoration;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.SearchView;
import android.view.MenuItem;
import android.view.View;

import java.util.ArrayList;
import java.util.List;

public class ResultActivity extends AppCompatActivity implements MyRecyclerViewAdapter.ItemClickListener{

    private MyRecyclerViewAdapter adapter;
    private List<MyRecyclerViewItemList> recyclerViewItemList;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_result);

        // calling the action bar
        ActionBar actionBar = getSupportActionBar();
        // set actionbar title
        actionBar.setTitle("Online Result");
        // showing the back button in action bar
        actionBar.setDisplayHomeAsUpEnabled(true);


        fillMyRecyclerViewItemList();
        setUpMyRecyclerView();


    }

    private void fillMyRecyclerViewItemList() {
        recyclerViewItemList = new ArrayList<>();
        recyclerViewItemList.add(new MyRecyclerViewItemList(R.drawable.psc, "PSC Result","http://180.211.137.51/"));
        recyclerViewItemList.add(new MyRecyclerViewItemList(R.drawable.education_board, "JSC/SSC/HSC Result","http://www.educationboardresults.gov.bd/"));
        recyclerViewItemList.add(new MyRecyclerViewItemList(R.drawable.education_board, "JSC/SSC/HSC SERVER-2","https://eboardresults.com/v2/home"));
        recyclerViewItemList.add(new MyRecyclerViewItemList(R.drawable.bteb_diploma, "BTEB Diploma Result","http://180.211.164.133/result_arch/index.php"));
        recyclerViewItemList.add(new MyRecyclerViewItemList(R.drawable.bteb_diploma, "BTEB Admission Result","http://btebadmission.gov.bd/website/"));
        recyclerViewItemList.add(new MyRecyclerViewItemList(R.drawable.bou, "BOU/ Open University Result","https://www.bou.org.bd/result/result.php"));
        recyclerViewItemList.add(new MyRecyclerViewItemList(R.drawable.bou, "BOU Year Wise Semester Result","https://exam.bou.ac.bd/"));
        recyclerViewItemList.add(new MyRecyclerViewItemList(R.drawable.nu, "NU All Result","https://www.nu.ac.bd/results/"));
        recyclerViewItemList.add(new MyRecyclerViewItemList(R.drawable.du7, "DU 7College Result","http://7college.du.ac.bd/result/index.php"));
        recyclerViewItemList.add(new MyRecyclerViewItemList(R.drawable.mbbs, "MBBS RESULT","http://result.dghs.gov.bd/"));
        recyclerViewItemList.add(new MyRecyclerViewItemList(R.drawable.education_board, "IHT/MATS Result","https://app.dghs.gov.bd/iht/"));
        recyclerViewItemList.add(new MyRecyclerViewItemList(R.drawable.education_board, "IHT/MATS Admission Result","http://dghs.teletalk.com.bd/iht/main.php"));
        recyclerViewItemList.add(new MyRecyclerViewItemList(R.drawable.bcps, "BCPS Result","https://bcps.edu.bd/result/"));
        recyclerViewItemList.add(new MyRecyclerViewItemList(R.drawable.ntrca, "NTRCA Rusult","http://ntrca.teletalk.com.bd/result/"));

    }


    private void setUpMyRecyclerView() {
        RecyclerView recyclerView = findViewById(R.id.recyclerId);
        recyclerView.setHasFixedSize(true);
        RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(this);
        recyclerView.addItemDecoration(new DividerItemDecoration(this,DividerItemDecoration.VERTICAL));
        adapter = new MyRecyclerViewAdapter(recyclerViewItemList);
        recyclerView.setLayoutManager(layoutManager);
        adapter.setClickListener(this);
        recyclerView.setAdapter(adapter);

    }



    // onclick RecyclerView item ----------
    @Override
    public void onItemClick(View view, int position) {
        Intent intent;
        if (position == 13) {
            intent = new Intent(ResultActivity.this,EmtyPage.class);
            startActivity(intent);
        } else {
            MyRecyclerViewItemList currentItem = recyclerViewItemList.get(position);

            String actionbar_title = currentItem.getText1();
            String url = currentItem.getUrl();

            intent = new Intent(ResultActivity.this,WebViewActivity.class);
            intent.putExtra("URL", url);
            intent.putExtra("ACTIONBAR_TITLE", actionbar_title);
            startActivity(intent);
        }

    }

    ///Searh Option Menu Appear
    @Override
    public boolean onCreateOptionsMenu(android.view.Menu menu) {
        getMenuInflater().inflate(R.menu.search_menu,menu);
        MenuItem item = menu.findItem(R.id.action_search);
        SearchView searchView = (SearchView) item.getActionView();
        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
            @Override
            public boolean onQueryTextSubmit(String s) {
                return false;
            }

            @Override
            public boolean onQueryTextChange(String s) {
                adapter.getFilter().filter(s);
                return false;
            }
        });

        return super.onCreateOptionsMenu(menu);
    }


    // this event will enable the back
    // function to the button on press
    @Override
    public boolean onOptionsItemSelected(@NonNull MenuItem item) {
        switch (item.getItemId()) {
            case android.R.id.home:
                this.finish();
                return true;
        }
        return super.onOptionsItemSelected(item);
    }

}

STEP8: Drawable Folder create Custom_ripple.xml

<?xml version="1.0" encoding="utf-8"?>
<ripple xmlns:android="http://schemas.android.com/apk/res/android"
    android:color="#757575">

    <item
        android:id="@android:id/mask"
        android:drawable="@android:color/white" />
</ripple>

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Recyclerview

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