FragmentActivity.java

package com.nightonke.boommenusample;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;

public class FragmentActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_fragment);

        ViewPager viewPager = (ViewPager) findViewById(R.id.view_pager);
        assert viewPager != null;
        viewPager.setAdapter(new FragmentPagerAdapter(getSupportFragmentManager()) {
            @Override
            public Fragment getItem(int position) {
                return new BMBFragment().position(position);
            }

            @Override
            public int getCount() {
                return 50;
            }
        });
    }
}