Android RecyclerView Tutorial - Fetching JSON

First add dependencies to android file 

Add recyclerview library in build.gradle file

implementation 'androidx.recyclerview:recyclerview:1.1.0'

Step 2
activity_complaints.xml
This XML file holds recyclerview component
<?xml version="1.0" encoding="utf-8"?>

<androidx.recyclerview.widget.RecyclerView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_height="match_parent"
    android:layout_width="match_parent"
    android:id="@+id/rvComplaintsList"
    >

</androidx.recyclerview.widget.RecyclerView>

Step 3
This will contain Components to be repeated via RecyclerView.
complainsts_list_layout.java
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:padding="8dp"
    >
    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/imgIcon"
        android:src="@mipmap/ic_launcher"/>
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:textSize="24sp"
        android:layout_gravity="center"
        android:id="@+id/txtTitle"
        android:text="@string/app_name"
        android:paddingLeft="16sp"/>

</LinearLayout>

Step 4
ComplaintsActivity.java 
This will hold different tasks related to RecyclerView
public class ComplaintsActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_complaints);
        RecyclerView complaintsList = (RecyclerView) findViewById(R.id.rvComplaintsList);
        complaintsList.setLayoutManager(new LinearLayoutManager(this));
        String[] complaint_type = {"Mechanical Fault", "Electrical Fault","Water Supply"};
        complaintsList.setAdapter(new ComplaintsAdapter(complaint_type));
    }
}

Step 5

Add Class ComplaintsAdapter.java

This is the main class. This is to include View Holder & Adapter Component

The Class will look like this

package in.xxxx.xxxxxx;

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

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

import org.w3c.dom.Text;

public class ComplaintsAdapter extends RecyclerView.Adapter<ComplaintsAdapter.ComplaintsViewHolder> {

    private String[] data;
    public ComplaintsAdapter(String[] data){
        this.data = data;
    }
    @NonNull
    @Override
    public ComplaintsViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        LayoutInflater inflater = LayoutInflater.from(parent.getContext());
        View view = inflater.inflate(R.layout.complaints_list_layout,parent,false);
        return new ComplaintsViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull ComplaintsViewHolder holder, int position) {
    String title = data[position];
    holder.txtTitle.setText(title);

    }

    @Override
    public int getItemCount() {
        return data.length;
    }

    public class ComplaintsViewHolder extends RecyclerView.ViewHolder {
        ImageView imgIcon;
        TextView txtTitle;
        public ComplaintsViewHolder(@NonNull View itemView) {
            super(itemView);
            imgIcon = (ImageView) itemView.findViewById(R.id.imgIcon);
            txtTitle = (TextView) itemView.findViewById(R.id.txtTitle);
        }
    }
}

This RecyclerView Tutorial worth a read as it helped me to learn this staff pretty easily.