I am very new to android development and hence, I am not able to solve my problems via help from other internet resources. Using Youtube videos, I am designing an app that uses both NavigationDrawer and TabLayout, and all the TabLayout items and navigation drawer items use fragments. My problem is that when I clicked on items in navigation drawers, the app still displays TabLayout's fragments instead of displaying the fragment corresponding to the clicked item from `NavigationDrawer. Please help me with this. I have included code and even an image below. Thanks a lot.
public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {
private DrawerLayout drawer;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//following gives toolbar and navigation bar can be viewed by sliding L-R
Toolbar toolbar = findViewById(R.id.toolbar_main);
setSupportActionBar(toolbar);
//attach sectionpageadapter to viewpager
SectionPagerAdapter pagerAdapter = new SectionPagerAdapter(getSupportFragmentManager());
ViewPager pager = findViewById(R.id.pager);
pager.setAdapter(pagerAdapter);
//attach viewpager to tablayout
TabLayout tabLayout = findViewById(R.id.tabs);
tabLayout.setupWithViewPager(pager);
//following to give hamburger sign to navigation drawer
drawer = findViewById(R.id.drawer_layout);
//references to listen to click events on navigation views
NavigationView navigationView = findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
//following for hamburger sign to rotate when slide from L-R
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(this, drawer,toolbar,
R.string.navigation_drawer_open,R.string.navigation_drawer_close);
drawer.addDrawerListener(toggle);
toggle.syncState();
//below is our default fragment which will be shown on create, without any clicks
//if statement so that it wont reload on rotation or resume of the device
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,
new HomeFragment()).commit();
navigationView.setCheckedItem(R.id.nav_home);
}
}
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
switch (menuItem.getItemId()){
case R.id.nav_home:
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,
new HomeFragment()).commit();
break;
case R.id.nav_myaccount:
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,
new AccountFragment()).commit();
break;
case R.id.nav_mymessages:
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,
new MessageFragment()).commit();
break;
case R.id.nav_mysongs:
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,
new MySongFragment()).commit();
break;
case R.id.nav_mystores:
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,
new StoreFragment()).commit();
break;
}
drawer.closeDrawer(GravityCompat.START);
return true;
}
@Override
//following for closing navagation bar instead of leaving activity immediately when you press back button
public void onBackPressed() {
if(drawer.isDrawerOpen(GravityCompat.START)){
drawer.closeDrawer(GravityCompat.START);
}else {
super.onBackPressed();
}
}
private class SectionPagerAdapter extends FragmentPagerAdapter{
public SectionPagerAdapter(FragmentManager fm){
super(fm,BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT);
}
@Override
public int getCount() {
return 4;
}
@NonNull
@Override
public Fragment getItem(int position) {
switch (position){
case 0:
return new HomeFragment();
case 1:
return new FragmentArtists();
case 2:
return new FragmentAlbum();
case 3:
return new FragmentPlaylists();
}
return null;
}
@Nullable
@Override
public CharSequence getPageTitle(int position) {
switch (position){
case 0:
return getResources().getText(R.string.home_tab);
case 1:
return getResources().getText(R.string.artist_tab);
case 2:
return getResources().getText(R.string.album_tab);
case 3:
return getResources().getText(R.string.playlist_tab);
}
return null;
}
}
}
Replace this code!
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
switch (menuItem.getItemId()){
case R.id.nav_home:
pager.setVisibility(View.VISIBLE);
tabs.setVisibility(View.VISIBLE);
fragmentConterner.setVisibility(View.GONE);
break;
case R.id.nav_myaccount:
pager.setVisibility(View.GONE);
tabs.setVisibility(View.GONE);
fragmentConterner.setVisibility(View.VISIBLE);
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,
new AccountFragment()).commit();
break;
case R.id.nav_mymessages:
pager.setVisibility(View.GONE);
tabs.setVisibility(View.GONE);
fragmentConterner.setVisibility(View.VISIBLE);
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,
new MessageFragment()).commit();
break;
case R.id.nav_mysongs:
pager.setVisibility(View.GONE);
tabs.setVisibility(View.GONE);
fragmentConterner.setVisibility(View.VISIBLE);
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,
new MySongFragment()).commit();
break;
case R.id.nav_mystores:
pager.setVisibility(View.GONE);
tabs.setVisibility(View.GONE);
fragmentConterner.setVisibility(View.VISIBLE);
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,
new StoreFragment()).commit();
break;
}
drawer.closeDrawer(GravityCompat.START);
return true;
}
I hope it's helpful for you!