Pagination and interface Example

--------------------------MainActivity------------------

package com.loggedin.mmf.myapplicationpagination;

import android.content.Context;
import android.os.Build;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.View;
import android.widget.Toast;

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

public class MainActivity extends AppCompatActivity {
    public final String TAG = "MainActivity";
    ArrayList<Dessert> desserts = new ArrayList<>();
    ContactListAdapter contactListAdapter;
    RecyclerView recycler_view_list;
    int lastScrollPosition = 0;
    LinearLayoutManager linearLayoutManager;
    Context context;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        randomDataLoad();
        recycler_view_list = findViewById(R.id.recycler_view_list);
        linearLayoutManager = new LinearLayoutManager(this);
        linearLayoutManager.setStackFromEnd(true);
        recycler_view_list.setLayoutManager(linearLayoutManager);
        contactListAdapter = new ContactListAdapter(context, desserts, new ContactListAdapter.OnItemClickListener() {
            @Override
            public void onItemCLick(View view, int position, List<Dessert> dessertsArrayList) {
                if (view.getId() == R.id.tv_contact_name) {
/*
//                                        dataget(position, dessertsArrayList);
*/
                }
            }
        });
        recycler_view_list.setAdapter(contactListAdapter);

        recycler_view_list.addOnScrollListener(new RecyclerView.OnScrollListener() {
            @Override
            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                super.onScrolled(recyclerView, dx, dy);
                lastScrollPosition = linearLayoutManager.findLastCompletelyVisibleItemPosition();
                Log.v(TAG, "LastPosition: " + lastScrollPosition);
                if (lastScrollPosition > 60) {
                    dataNew();
                    contactListAdapter.notifyDataSetChanged();
                    Toast.makeText(MainActivity.this, "DATA LOAD NEW", Toast.LENGTH_SHORT).show();
                    contactListAdapter = new ContactListAdapter(context, desserts, new ContactListAdapter.OnItemClickListener() {
                        @Override
                        public void onItemCLick(View view, int position, List<Dessert> dessertsArrayList) {
                            if (view.getId() == R.id.tv_contact_name) {
/*
//                                        dataget(position, dessertsArrayList);
*/
                            }
                        }
                    });
                }

            }
        });
    }


    private void dataNew() {
        for (int i = 160; i < 280; i++) {
            Dessert dessert = new Dessert();
            dessert.setUsername(String.valueOf(i));
            desserts.add(dessert);
        }
    }

    private void randomDataLoad() {
        for (int i = 0; i < 150; i++) {
            Dessert dessert = new Dessert();
            dessert.setUsername(String.valueOf(i));
            desserts.add(dessert);
        }
    }
}

----------------recycler_view_list.xml----------------

<?xml version="1.0" encoding="utf-8"?>

<android.support.constraint.ConstraintLayout 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"

    tools:context=".MainActivity">

    <android.support.v7.widget.RecyclerView

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:id="@+id/recycler_view_list"

        app:layout_constraintBottom_toBottomOf="parent"

        app:layout_constraintLeft_toLeftOf="parent"

        app:layout_constraintRight_toRightOf="parent"

        app:layout_constraintTop_toTopOf="parent" />

</android.support.constraint.ConstraintLayout>

----------------ContactListAdapter----------

package com.loggedin.mmf.myapplicationpagination;

import android.annotation.SuppressLint;

import android.content.Context;

import android.support.annotation.NonNull;

import android.support.v7.widget.RecyclerView;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.TextView;

import java.util.List;

public class ContactListAdapter extends RecyclerView.Adapter<ContactListAdapter.DessertVh> {

    private ContactListAdapter.OnItemClickListener itemClickListener;

    public static final String TAG = "NearContactAdapter";

    private List<Dessert> dessertsArrayList;

    private Context context;

    public ContactListAdapter(Context context, List<Dessert> dessertsArrayList, ContactListAdapter.OnItemClickListener itemClickListener) {

        this.context = context;

        this.dessertsArrayList = dessertsArrayList;

    }

    @NonNull

    @Override

    public ContactListAdapter.DessertVh onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {

        LayoutInflater inflater = LayoutInflater.from(parent.getContext());

        View view = inflater.inflate(R.layout.contact_list_adapter, parent, false);

        return new ContactListAdapter.DessertVh(view);

    }

    @Override

    public void onBindViewHolder(@NonNull final ContactListAdapter.DessertVh holder, @SuppressLint("RecyclerView") final int position) {

        final Dessert dessert = dessertsArrayList.get(holder.getAdapterPosition());

        holder.tv_contact_name.setText(dessert.getUsername());

        holder.tv_contact_name.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View view) {

                itemClickListener.onItemCLick(view, holder.getAdapterPosition(), dessertsArrayList);

            }

        });

        //shirsh

    }

    @Override

    public int getItemCount() {

        return dessertsArrayList.size();

    }

    public static class DessertVh extends RecyclerView.ViewHolder {

        TextView tv_contact_name;

        public DessertVh(View itemView) {

            super(itemView);

            tv_contact_name = itemView.findViewById(R.id.tv_contact_name);

        }

    }

    public interface OnItemClickListener {

        void onItemCLick(View view, int position, List<Dessert> dessertsArrayList);

    }

}

-------------Dessert-----------------------

package com.loggedin.mmf.myapplicationpagination;

public class Dessert {

    public String getUsername() {

        return Username;

    }

    public void setUsername(String username) {

        Username = username;

    }

    public String getUsernumber() {

        return Usernumber;

    }

    public void setUsernumber(String usernumber) {

        Usernumber = usernumber;

    }

    String Username;

    String Usernumber;

}

-----------contact_list_adapter.xml--------

<?xml version="1.0" encoding="utf-8"?>

<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="wrap_content">

    <TextView

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:id="@+id/tv_contact_name"/>

</android.support.constraint.ConstraintLayout>

Flutter Set Up In Android Studio

Flutter Install Procedure
1) git path set in Path
C:\Users\MMFA-YOGESH\AppData\Local\GitHub\PortableGit_25d850739bc178b2eb13c3e2a9faafea2f9143c0\cmd

2)window path set
C:\Windows\System32

3)flutter path set
C:\src\flutter\bin

4)dart and flutter plugin download in android studio

C:\Users\MMFA-YOGESH\.android;C:\src\flutter\bin;C:\Users\MMFA-YOGESH\AppData\Local\GitHub\PortableGit_25d850739bc178b2eb13c3e2a9faafea2f9143c0\cmd;C:\Windows\System32