The problem is this: I need to get the ViewGroup to inflate and thus be able to initialize my RecyclerView because when I change Tab (Tab) and return to it I have all the Fragment blank. I have been reading and testing and they say that I must do it onCreate, I do not get it, other than onAttach, where?
I leave a fragment of the code ...
...
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// AQUÍ QUIERO INFLAR Y HACER LO DE onCreateView
}
...
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
super.onCreateView(inflater, container, savedInstanceState);
final View view = inflater.inflate(R.layout.fragment_news_list, container, false);
mRecyclerView = (RecyclerView) view.findViewById(R.id.recycler_view_news_list);
mRecyclerView.setHasFixedSize(true);
mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
updateUI();
return view;
}
@Override
public void onResume() {
super.onResume();
updateUI();
}
protected void updateUI() {
List<News> news = NewsLab.getInstance(getActivity()).getArticles();
if (mAdapter == null) {
mRecyclerView.setAdapter(mAdapter = new NewsAdapter(news));
} else {
mAdapter.setNews(news);
mAdapter.notifyDataSetChanged();
}
}
...
I update
public class HomeActivity extends AppCompatActivity {
// PROPERTIES
private ViewPager mViewPager;
// MENU METHODS
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_home_menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.to_search_menu_item:
return true;
default:
return super.onOptionsItemSelected(item);
}
}
// METHODS
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
setupViewPager(mViewPager = (ViewPager) findViewById(R.id.container));
TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(mViewPager);
}
private void setupViewPager(ViewPager viewPager) {
SectionsPagerAdapter adapter = new SectionsPagerAdapter(getSupportFragmentManager());
adapter.addFragment(new NewsTagFragment(), getString(R.string.tag_news));
adapter.addFragment(new CommercesTagFragment(), getString(R.string.tag_commerces));
adapter.addFragment(new OffersTagFragment(), getString(R.string.tag_offers));
adapter.addFragment(new ServicesTagFragment(), getString(R.string.tag_services));
viewPager.setAdapter(adapter);
}
// INNED CLASSES
public class SectionsPagerAdapter extends FragmentPagerAdapter {
// PROPERTIES
private final List<Fragment> mFragmentList = new ArrayList<>();
private final List<String> mFragmentTitleList = new ArrayList<>();
// CONSTRUCTORS
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
// METHODS
public void addFragment(Fragment fragment, String title) {
mFragmentList.add(fragment);
mFragmentTitleList.add(title);
}
// OVERRIDE METHODS
@Override
public Fragment getItem(int position) {
return mFragmentList.get(position);
}
@Override
public int getCount() {
return mFragmentList.size();
}
@Override
public CharSequence getPageTitle(int position) {
return mFragmentTitleList.get(position);
}
}
Thank you.