MainActivity

package com.example.catalogmovie;

import android.os.Bundle;
import android.support.design.widget.BottomNavigationView;
import android.support.v4.app.Fragment;
import android.support.v7.app.AppCompatActivity;
import android.support.annotation.NonNull;
import android.view.MenuItem;
import android.widget.FrameLayout;

import com.example.catalogmovie.Fragment.MoviesFragment;
import com.example.catalogmovie.Fragment.TvFragment;


public class MainActivity extends AppCompatActivity {

    private FrameLayout flMovies;

    private BottomNavigationView.OnNavigationItemSelectedListener mOnNavigationItemSelectedListener
            = new BottomNavigationView.OnNavigationItemSelectedListener() {

        @Override
        public boolean onNavigationItemSelected(@NonNull MenuItem item) {

            Fragment fragment;

            switch (item.getItemId()) {
                case R.id.navigation_home:
                    fragment = new MoviesFragment();
                    getSupportFragmentManager().beginTransaction()
                            .replace(R.id.container_layout, fragment, fragment.getClass().getSimpleName())
                            .commit();
                    return true;

                case R.id.navigation_dashboard:
                    fragment = new TvFragment();
                    getSupportFragmentManager().beginTransaction()
                            .replace(R.id.container_layout, fragment, fragment.getClass().getSimpleName())
                            .commit();
                    return true;
            }
            return false;
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        BottomNavigationView navView = findViewById(R.id.navigation);
        navView.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);

        flMovies = findViewById(R.id.container_layout);


    }
}