page tab in android

gistfile1.txt

https://android.jlelse.eu/tablayout-and-viewpager-in-your-android-app-738b8840c38a

https://developer.android.com/reference/com/google/android/material/tabs/TabLayout

https://material.io/develop/android/components/tab-layout/

gistfile2.txt

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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">

    <com.google.android.material.tabs.TabLayout
        android:id="@+id/tabs"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <com.google.android.material.tabs.TabItem
            android:icon="@drawable/ic_shopping_cart_one"
            android:text="@string/tab_a_label"
            android:layout_height="match_parent"
            android:layout_width="wrap_content" />

        <com.google.android.material.tabs.TabItem
            android:icon="@drawable/ic_shopping_cart_two"
            android:text="@string/tab_b_label"
            android:layout_height="match_parent"
            android:layout_width="wrap_content" />

        <com.google.android.material.tabs.TabItem
            android:icon="@drawable/ic_delete_one"
            android:text="@string/tab_c_label"
            android:layout_height="match_parent"
            android:layout_width="wrap_content" />

    </com.google.android.material.tabs.TabLayout>

    <androidx.viewpager.widget.ViewPager
        android:id="@+id/viewPager"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/tabs"
        app:layout_constraintVertical_bias="0.0"></androidx.viewpager.widget.ViewPager>

</androidx.constraintlayout.widget.ConstraintLayout>

gistfile3.txt

package smit.aen.tuktukone.adapter;

import android.content.Context;

import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentPagerAdapter;
import smit.aen.tuktukone.R;
import smit.aen.tuktukone.fragments.TokenListCloseFrag;
import smit.aen.tuktukone.fragments.TokenListCompFrag;
import smit.aen.tuktukone.fragments.TokenListFrag;

public class SimpleFragPagerAdap extends FragmentPagerAdapter {

    private static final String TAG = SimpleFragPagerAdap.class.getSimpleName();
    private Context mContext;
    private int tabCount = 3;

    public SimpleFragPagerAdap(Context context, FragmentManager fm) {
        super(fm);
        mContext = context;
    }


    @Override
    public Fragment getItem(int position) {
        if (position==0){
            return new TokenListFrag();
        }else if (position==1){
            return new TokenListCompFrag();
        }else if (position==2){
            return new TokenListCloseFrag();
        }else {
            return null;
        }
    }

    @Override
    public int getCount() {
        return tabCount;
    }

    @Nullable
    @Override
    public CharSequence getPageTitle(int position) {
        switch (position){
            case 0:
                return mContext.getString(R.string.tab_a_label);
            case 1:
                return mContext.getString(R.string.tab_b_label);
            case 2:
                return mContext.getString(R.string.tab_c_label);
             default:
                    return null;
        }
    }
}

gistfile4.txt

package smit.aen.tuktukone.fragments;

import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import com.google.android.material.tabs.TabLayout;

import java.util.Objects;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.viewpager.widget.ViewPager;
import smit.aen.tuktukone.NavMainActivity;
import smit.aen.tuktukone.R;
import smit.aen.tuktukone.adapter.SimpleFragPagerAdap;

public class TokenTabTestFrag extends Fragment {

    private static final String TAG = TokenTabTestFrag.class.getSimpleName();
    private Context context;

    private ViewPager mViewPager;
    private SimpleFragPagerAdap mAdapter;
    private  TabLayout tabLayout;


    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.af_token_tab_test, container, false);
        context = container.getContext();
        return view;
    }

    @Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        bindView(view);

        tabLayout.setupWithViewPager(mViewPager);


    }

    private void bindView(View view) {
        mViewPager = view.findViewById(R.id.viewPager);
        mAdapter = new SimpleFragPagerAdap(context, getActivity().getSupportFragmentManager());
        mViewPager.setAdapter(mAdapter);
         tabLayout = view.findViewById(R.id.tabs);

    }
}