Tablayout with Viewpager in Andfroid....|| Custom tab Layout with View PAGER IN ANDROID...

 

in Main Xml do this...

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    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"
  android:weightSum="1"
    tools:context=".activities.TabLayout">



    <androidx.viewpager.widget.ViewPager
        android:layout_weight=".9"
        android:id="@+id/viewPager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:ignore="SpeakableTextPresentCheck">

    </androidx.viewpager.widget.ViewPager>

    <com.google.android.material.tabs.TabLayout
        android:layout_weight=".1"
        android:id="@+id/tabLayout"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:background="@color/red"
        app:tabIndicatorColor="@color/red"
        app:tabRippleColor="@null"
        app:tabSelectedTextColor="@color/white"
        app:tabTextColor="@color/black"
        tools:ignore="SpeakableTextPresentCheck" />

</LinearLayout>

 Then Go to Class do this..

package com.daizzyinfosys.onlyleaningpurpose.activities;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;

import com.daizzyinfosys.onlyleaningpurpose.adapters.View_PagerAdapter;
import com.daizzyinfosys.onlyleaningpurpose.databinding.ActivityTabLayoutBinding;
import com.daizzyinfosys.onlyleaningpurpose.fragments.OrderEntryFragment;
import com.daizzyinfosys.onlyleaningpurpose.fragments.PromoFragment;
import com.daizzyinfosys.onlyleaningpurpose.fragments.ReviewFragment;

public class TabLayout extends AppCompatActivity {

ActivityTabLayoutBinding binding;
View_PagerAdapter adapters;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        binding = ActivityTabLayoutBinding.inflate(getLayoutInflater());
        View view = binding.getRoot();
        setContentView(view);
        
        adapters=new View_PagerAdapter(getSupportFragmentManager(),3);
        adapters.AddFragments(new OrderEntryFragment(),"title");
        adapters.AddFragments(new ReviewFragment(),"title");
        adapters.AddFragments(new PromoFragment(),"title");
        
        binding.viewPager.setAdapter(adapters);
        binding.tabLayout.setupWithViewPager(binding.viewPager);
        
    }
    
    @Override
    public void onBackPressed() {

        if (binding.viewPager.getCurrentItem() == 2) {

            binding.viewPager.setCurrentItem(binding.viewPager.getCurrentItem() - 2,false);

        }
        else if (binding.viewPager.getCurrentItem() == 1)
        {
            binding.viewPager.setCurrentItem(binding.viewPager.getCurrentItem() - 1,false);
        }
        else{
            super.onBackPressed();
            finish();

        }

    }


}

Then Create A Adapter...

package com.daizzyinfosys.onlyleaningpurpose.adapters;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentPagerAdapter;

import java.util.ArrayList;

public class View_PagerAdapter extends FragmentPagerAdapter {

    ArrayList<Fragment> fragments = new ArrayList<Fragment>();
    ArrayList<String> titles = new ArrayList<String>();

    public View_PagerAdapter(@NonNull FragmentManager fm, int behavior) {
        super(fm, behavior);
    }

    @NonNull
    @Override
    public Fragment getItem(int position) {

        return fragments.get(position);

    }

    @Override
    public int getCount() {

        return fragments.size();
    }

    public void AddFragments(Fragment fragment ,String title) {
        fragments.add(fragment);
        titles.add(title);
    }

    @Nullable
    @Override
    public CharSequence getPageTitle(int position) {
        switch (position) {
            case 0: {
                return "Order Entry";

            }
            case 1: {
                return "Review";
            }
            case 2: {

                return "Promo";
            }
            default:
                return null;
        }
    }
}

 this is Complete code tnxx...