How To Create a Custom Tab Layout In Android studio in Hindi

 Step 1 - Create A new Android studio project and design your activity_main.xml 

<?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"
    tools:context=".MainActivity">


    <com.google.android.material.tabs.TabLayout
        android:id="@+id/tab_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:tabMaxWidth="0dp"
        app:tabGravity="fill"
        app:tabMode="fixed"
        android:background="@color/purple_500"
        android:elevation="2dp"
        app:tabIndicatorColor="@color/white"
        app:tabSelectedTextColor="@color/white"
        app:tabTextColor="@color/black" />

    <androidx.viewpager.widget.ViewPager
        android:id="@+id/view_pager"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
</LinearLayout>

Step 2 - Create Fragments For Replaces In Tab layout 

Demo Fragments -- Demo1Fragment  , Demo2Fragment , Demo3Fragment

Step 3 - Create FragmentAdapter.java  Class and extends FragmentPagerAdapter 

after extends implements methods

public FragmentAdapter(@NonNull FragmentManager fm) {
    super(fm);
}

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

@NonNull
@Override
public Fragment getItem(int position) {
    switch (position) {
        case 0:
            return new Demo1Fragment();

        case 1:
            return new Demo2Fragment();
        case 2:
            return new Demo3Fragment();

        default:
            return new Demo1Fragment();
    }
}

@Override
public int getCount() {
    return 3;
}

@Nullable
@Override
public CharSequence getPageTitle(int position) {
    String title = null;
    if (position == 0) {
        title = "Demo1";
    } else if (position == 1) {
        title = "Demo2";
    } else {
        title = "Demo3";
    }

    return title;
}

Step 3 - code in MainActivity.java  before onCreate Method

TabLayout tabLayout;
ViewPager viewPager;

after onCreate Method -

viewPager = findViewById(R.id.view_pager);
viewPager.setAdapter(new FragmentAdapter(getSupportFragmentManager()));

tabLayout = findViewById(R.id.tab_layout);
tabLayout.setupWithViewPager(viewPager);