MainActivity.java

package co.ortizol.u4s3c5ex2tiendamultimedia;

import android.support.design.widget.TabLayout;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;

import co.ortizol.u4s3c5ex2tiendamultimedia.adapters.MultimediaTabsAdapter;

public class MainActivity extends AppCompatActivity {

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

        Toolbar tbrPrincipal = (Toolbar) findViewById(R.id.tbrPrincipal);
        setSupportActionBar(tbrPrincipal);

        TabLayout tblSeccionesMultimedia = (TabLayout) findViewById(R.id.tblSeccionesMultimedia);
        ViewPager vprMultimedia = (ViewPager) findViewById(R.id.vprMultimedia);

        if(vprMultimedia != null){
            vprMultimedia.setAdapter(new MultimediaTabsAdapter(getSupportFragmentManager(), this));
        }

        if(tblSeccionesMultimedia != null){
            tblSeccionesMultimedia.setupWithViewPager(vprMultimedia, true);
        }
    }
}