package com.easyappointments; import android.os.Bundle; import android.support.annotation.NonNull; import android.support.design.widget.BottomNavigationView; import android.support.v4.app.Fragment; import android.support.v7.app.AppCompatActivity; import android.view.MenuItem; import com.easyappointments.fragments.AppointmentFragmentList; import com.easyappointments.fragments.CustomerFragmentList; import com.easyappointments.fragments.ServiceFragmentList; public class MainActivity extends AppCompatActivity { public AppointmentFragmentList getAppsFragment() { if (appsFragment == null) { appsFragment = new AppointmentFragmentList(); } return appsFragment; } public CustomerFragmentList getCustomersFragment() { if (customersFragment == null) { customersFragment = new CustomerFragmentList(); } return customersFragment; } public ServiceFragmentList getServicesFragment() { if (servicesFragment == null) { servicesFragment = new ServiceFragmentList(); } return servicesFragment; } private AppointmentFragmentList appsFragment; private CustomerFragmentList customersFragment; private ServiceFragmentList servicesFragment; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); getSupportActionBar().setDisplayHomeAsUpEnabled(false); final Bundle b = getIntent().getExtras(); BottomNavigationView navigation = (BottomNavigationView) findViewById(R.id.navigation); navigation.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() { @Override public boolean onNavigationItemSelected(@NonNull MenuItem item) { Fragment frag = null; switch (item.getItemId()) { case R.id.navigation_next_appointments: frag = getAppsFragment(); break; case R.id.navigation_customers: frag = getCustomersFragment(); break; case R.id.navigation_services: frag = getServicesFragment(); frag.setArguments(b); break; default: return false; } getSupportFragmentManager() .beginTransaction() .replace(R.id.main_content, frag) .commit(); return true; } }); appsFragment = new AppointmentFragmentList(); getSupportFragmentManager().beginTransaction().replace(R.id.main_content, getAppsFragment()).commit(); } }