I have 4 fragments
ISSUE
there is no proper title displayed in each fragment
when I am jumping between them.
I have created a gif to show that:
Titles should be the same as a text in each fragment.
My MainActivity
looks like this:
public class MainActivity extends AppCompatActivity {
private Toolbar toolbar;
private TabLayout tabLayout;
private ViewPager viewPager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
viewPager = (ViewPager) findViewById(R.id.viewpager);
setupViewPager(viewPager);
tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(viewPager);
}
private void setupViewPager(ViewPager viewPager) {
ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
adapter.addFragment(new InfoFragment(), "INFO");
adapter.addFragment(new NavFragment(), "NAV");
adapter.addFragment(new PetrolFragment(), "PETROL");
adapter.addFragment(new CalcFragment(), "CALC");
viewPager.setAdapter(adapter);
}
public void setActionBarTitle(String title) {
getSupportActionBar().setTitle(title);
}
Each of my fragments looks like this:
public class InfoFragment extends Fragment {
public InfoFragment() {
// Required empty public constructor
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
((MainActivity) getActivity()).setActionBarTitle("INFO"); // here are other names according to each fragment
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_info, container, false);
}
}
I don't know if it's a proper way to do that but you can add a page change listener to your viewpager and in onPageSelected method you can change your title:
yourViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
// change your title
// inflate menu
// customize your toolbar
}
@Override
public void onPageScrollStateChanged(int state) {
}
});
Try the following code
For Fragment title :
getActivity().getActionBar().setTitle("Fragment1");
Add this lines to all your Fragments onCreate
or OnCreateView
method
((MainActivity) getActivity()).setActionBarTitle("Your title");
by Default set a fragment in MainActivity
viewPager.setCurrentItem(0);
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