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I have TabLayout in Fragment and then used FragmentTransaction to intent from Main Activity to Fragment

I have TabLayout in Fragment and then used FragmentTransaction to intent from Main Activity to Fragment, But When Transaction from Activity to Fragment Show this Problem.
toolbar = (Toolbar) view.findViewById(R.id.Toolbar);
((AppCompatActivity)getActivity()).setSupportActionBar(toolbar);
// setSupportActionBar(toolbar);
// getSupportActionBar().setDisplayHomeAsUpEnabled(true);
viewPager = (ViewPager)view. findViewById(R.id.viewpager1);
setupViewPager(viewPager);
tabLayout = (TabLayout) view.findViewById(R.id.tabs);
tabLayout.setupWithViewPager(viewPager);
// setupTabIcons();
return view;
}
// Add Fragments to Tabs
private void setupViewPager(ViewPager viewPager) {
ViewPagerAdapter adapter = new ViewPagerAdapter(getChildFragmentManager());
// ViewPagerAdapter adapter = new ViewPagerAdapter(getActivity().getFragmentManager());
adapter.addFrag(new AllFragment() ,"All");
adapter.addFrag(new ManFragment(),"Man");
adapter.addFrag(new WomenFragment(),"Women");
adapter.addFrag( new KidsFragment(),"Kids");
viewPager.setAdapter(adapter);
}
class ViewPagerAdapter extends FragmentPagerAdapter {
private final List<Fragment> mFragmentList = new ArrayList<>();
private final List<String> mFragmentTitleList = new ArrayList<>();
public ViewPagerAdapter(FragmentManager manager) {
super(manager);
}
#Override
public android.support.v4.app.Fragment getItem(int position) {
return mFragmentList.get(position);
}
#Override
public int getCount() {
return mFragmentList.size();
}
public void addFrag(Fragment fragment, String title) {
mFragmentList.add(fragment);
mFragmentTitleList.add(title);
}
#Override
public CharSequence getPageTitle(int position) {
return mFragmentTitleList.get(position);
}
}
MainActivivty :

Fragment not restoring edittext value after swapping back in view_pager

first fragment not restoring edit box value after swapping 3 fragment in viewPager... i have 3 fragment inside viewpager and after clicking on 3rd fragment tab and swap back to 1st fragment .. edit text filling blank.. plz give some solutions.. code is here..
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_item_master, container, false);
viewPager = (ViewPager)v. findViewById(R.id.viewpager);
setupViewPager(viewPager);
tabLayout = (TabLayout)v. findViewById(R.id.tabs);
tabLayout.setupWithViewPager(viewPager);
return v;
}
private void setupViewPager(ViewPager viewPager) {
// ViewPagerAdapter adapter = new ViewPagerAdapter(mActivity.getSupportFragmentManager());
ViewPagerAdapter adapter = new ViewPagerAdapter(getChildFragmentManager());
adapter.addFragment(new ItemInfoFragment(), "Item Info");
adapter.addFragment(new ItemExtraInfoFragment(), "Extra Info");
adapter.addFragment(new OrderHistoryFragment(), "Order History");
viewPager.setAdapter(adapter);
}
class ViewPagerAdapter extends FragmentStatePagerAdapter {
private final List<Fragment> mFragmentList = new ArrayList<>();
private final List<String> mFragmentTitleList = new ArrayList<>();
public ViewPagerAdapter(FragmentManager manager) {
super(manager);
}
#Override
public Fragment getItem(int position) {
return mFragmentList.get(position);
}
#Override
public int getCount() {
return mFragmentList.size();
}
public void addFragment(Fragment fragment, String title) {
mFragmentList.add(fragment);
mFragmentTitleList.add(title);
}

This is recommended only if you have less number of fragments. You can use yourViewPager.setOffscreenPageLimit(numberOfFragmentsInViewPager);What this does is it wont create a new fragment every time you swipe, thus data is persisted. the default value will be 1 if you won't set this property.

Tab Layout in a Fragment

i am trying to create a tab layout in a fragment but i am facing an error in creating the ViewPagerAdapter as it cannot resolve method getFragmentManger()
i tried using getActivity but the problem still exist
that is the code for the fragment
public class HomeFragment extends Fragment {
private TabLayout tabLayout;
private ViewPager viewPager;
public static final String TAG = "HF";
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_home, container, false);
viewPager = (ViewPager) getActivity().findViewById(R.id.viewpager);
setupViewPager(viewPager);
tabLayout = (TabLayout) getActivity().findViewById(R.id.tabs);
tabLayout.setupWithViewPager(viewPager);
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
}
private void setupViewPager(ViewPager viewPager) {
ViewPagerAdapter adapter = new ViewPagerAdapter(getFragmentManager());
adapter.addFragment(new OneFragment(), "ONE");
adapter.addFragment(new TwoFragment(), "TWO");
adapter.addFragment(new ThreeFragment(), "THREE");
viewPager.setAdapter(adapter);
}
class ViewPagerAdapter extends FragmentPagerAdapter {
private final List<android.support.v4.app.Fragment> mFragmentList = new ArrayList<>();
private final List<String> mFragmentTitleList = new ArrayList<>();
public ViewPagerAdapter(FragmentManager manager) {
super(manager);
}
#Override
public android.support.v4.app.Fragment getItem(int position) {
return mFragmentList.get(position);
}
#Override
public int getCount() {
return mFragmentList.size();
}
public void addFragment(android.support.v4.app.Fragment fragment, String title) {
mFragmentList.add(fragment);
mFragmentTitleList.add(title);
}
#Override
public CharSequence getPageTitle(int position) {
return mFragmentTitleList.get(position);
}
}
}

View is not inflated on returning to the tab fragment

I have one activity named rootActivity , in which i have a rootContainer in which i replace the fragments.
Now, the first fragment that i replace is DashboardFragment.
I now click on the cross to open a new fragment like this...
Now when i press the back button the content of dashboard fragment is lost.
Can someone help me
Here's a video to show what's really happening.
https://youtu.be/NobqYUCEZKY
Code for the DashboardFragment(contains the fragments inside tabs)
public class DashboardFragment extends Fragment {
private Toolbar toolbar;
private TabLayout tabLayout;
private ViewPager viewPager;
private View rootView;
/**
*
* #param config : For setting up stuff by the given config
* #return
*/
public static DashboardFragment newInstance(Bundle config) {
DashboardFragment fragment = new DashboardFragment();
fragment.setArguments(config);
return fragment;
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.activity_dashboard, container, false);
toolbar = (Toolbar) rootView.findViewById(R.id.toolbar);
((RootActivity)getActivity()).setSupportActionBar(toolbar);
viewPager = (ViewPager) rootView.findViewById(R.id.viewpager);
setupViewPager(viewPager);
tabLayout = (TabLayout) rootView.findViewById(R.id.tabs);
tabLayout.setupWithViewPager(viewPager);
setupTabIcons();
return rootView;
}
private void setupTabIcons() {
tabLayout.getTabAt(0).setIcon(android.R.drawable.btn_star_big_off);
tabLayout.getTabAt(1).setIcon(android.R.drawable.btn_star_big_on);
}
private void setupViewPager(ViewPager viewPager) {
ViewPagerAdapter adapter = new ViewPagerAdapter(getActivity().getSupportFragmentManager());
adapter.addFragment(new TrackeesFragment(), "Trackee");
adapter.addFragment(new TrackersFragment(), "Trackers");
viewPager.setAdapter(adapter);
}
class ViewPagerAdapter extends FragmentStatePagerAdapter {
private final List<Fragment> mFragmentList = new ArrayList<>();
private final List<String> mFragmentTitleList = new ArrayList<>();
public ViewPagerAdapter(FragmentManager manager) {
super(manager);
}
#Override
public Fragment getItem(int position) {
return mFragmentList.get(position);
}
#Override
public int getCount() {
return mFragmentList.size();
}
public void addFragment(Fragment fragment, String title) {
mFragmentList.add(fragment);
mFragmentTitleList.add(title);
}
#Override
public Object instantiateItem(ViewGroup container, int position) {
return super.instantiateItem(container, position);
}
#Override
public CharSequence getPageTitle(int position) {
return null;
}
}
}

try by changing the following line in
setupViewPager(ViewPager viewPager) {}
Change
ViewPagerAdapter adapter = new ViewPagerAdapter(getActivity().getSupportFragmentManager());
To
ViewPagerAdapter adapter = new ViewPagerAdapter(getChildFragmentManager());

Fragment onCreateView method not called in TabLayout with ViewPagerAdapter

I have follow this link to implement tablayout Android Material Design working with Tabs
Now what I did I use fragment instead of Activity for tablayout.
Below is code :-
public class HopitalTabLayoutFragment extends Fragment {
private TabLayout tabLayout;
private ViewPager viewPager;
public HopitalTabLayoutFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_hopital_tab_layout, container, false);
viewPager = (ViewPager)view. findViewById(R.id.viewpager);
setupViewPager(viewPager);
tabLayout = (TabLayout)view. findViewById(R.id.tabs);
tabLayout.setupWithViewPager(viewPager);
return view;
}
private void setupViewPager(ViewPager viewPager) {
ViewPagerAdapter adapter = new ViewPagerAdapter(getFragmentManager());
adapter.addFragment(new OneFragment(), "ONE");
adapter.addFragment(new TwoFragment(), "TWO");
adapter.addFragment(new ThreeFragment(), "THREE");
viewPager.setAdapter(adapter);
}
class ViewPagerAdapter extends FragmentPagerAdapter {
private final List<Fragment> mFragmentList = new ArrayList<>();
private final List<String> mFragmentTitleList = new ArrayList<>();
public ViewPagerAdapter(FragmentManager manager) {
super(manager);
}
#Override
public Fragment getItem(int position) {
return mFragmentList.get(position);
}
#Override
public int getCount() {
return mFragmentList.size();
}
public void addFragment(Fragment fragment, String title) {
mFragmentList.add(fragment);
mFragmentTitleList.add(title);
}
#Override
public CharSequence getPageTitle(int position) {
return mFragmentTitleList.get(position);
}
}
}
and add this fragment from Activity :-
public class HomeActivityDrawer extends AppCompatActivity {
private Toolbar toolbar;
private NavigationView navigation_view_left, navigation_view_right;
private DrawerLayout drawerLayout;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home_drawer);
drawerLayout = (DrawerLayout) findViewById(R.id.drawer);
drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
header = (RelativeLayout) findViewById(R.id.header);
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
fragment = new HopitalTabLayoutFragment();
}
}
These are my three fragments which are used in tab layout:-
public class TwoFragment extends Fragment {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_two, container, false);
TextView tv = (TextView) view.findViewById(R.id.tv);
tv.setText("DONE");
return view;
}
}
Similarly One and Three.
Now the problem is that at first time all the three fragments are loaded and onCreateView method runs but when I open tablayout again only fragment One initiate not the second one. What's going wrong in this code? Please help!!

Import FragmentStatePagerAdapter instead FragmentPagerAdapter.
import android.support.v4.app.FragmentPagerAdapter;
to
import android.support.v4.app.FragmentStatePagerAdapter;
and then extend from FragmentStatePagerAdapter:
class ViewPagerAdapter extends FragmentPagerAdapter
to
class ViewPagerAdapter extends FragmentStatePagerAdapter