Develop Reference

tabs fragment isn't displayed after reload

I'm creating an app with view pager and tabs:
At the first time clicked on "menu" item in the bottom navigation the text frag1, frag2 and frag3 are displayed as expected on the screen by clicking on the tabs and swiping (viewpager).
See image below:
But when I click an another item (e.g. home) and go back to "menu" item the text frag 1 and etc. are not display. See image below:
MenuFragment with viewpageradapter:
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_menu, container, false);
setHasOptionsMenu(true);
ButterKnife.bind(this, view);
FragmentManager fragManager = myContext.getSupportFragmentManager();
viewPagerAdapter = new ViewPagerAdapter(fragManager);
viewPagerAdapter.addFragment(new MenuRecyclerViewFragment(), "FRAG1"); // `new MenuRecyclerViewFragment()` should be inside `FragmentPagerAdapter.getItem()`
viewPagerAdapter.addFragment(new MenuRecyclerViewFragment(), "FRAG2"); // `new MenuRecyclerViewFragment()` should be inside `FragmentPagerAdapter.getItem()`
viewPagerAdapter.addFragment(new MenuRecyclerViewFragment(), "FRAG3"); // `new MenuRecyclerViewFragment()` should be inside `FragmentPagerAdapter.getItem()`
viewPager.setAdapter(viewPagerAdapter);
tabLayout.setupWithViewPager(viewPager);
viewPager.setOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
#Override
public void onTabSelected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(TabLayout.Tab tab) {
}
#Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
return view;
}
class ViewPagerAdapter extends FragmentPagerAdapter {
public final List<Fragment> mFragmentList = new ArrayList<>(); // this line can cause crashes
public final List<String> mFragmentTitleList = new ArrayList<>();
public ViewPagerAdapter(FragmentManager manager) {
super(manager);
}
#Override
public Fragment getItem(int position) {
Fragment fragment = mFragmentList.get(position);
Bundle bundle = new Bundle();
bundle.putString("text", mFragmentTitleList.get(position));
fragment.setArguments(bundle);
return fragment;
}
#Override
public int getCount() {
return mFragmentList.size();
}
public void addFragment(Fragment fragment, String title) {
mFragmentList.add(fragment); // this line can cause crashes
mFragmentTitleList.add(title);
}
#Override
public CharSequence getPageTitle(int position) {
return mFragmentTitleList.get(position);
}
}
MenuRecylerViewFragment:
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_menu_recycler_view, container, false);
ButterKnife.bind(this, view);
Bundle bundle = this.getArguments();
if (bundle != null) {
String value = bundle.getString("text", "test");
textView.setText(value);
}
return view;
}

The second time you land to this fragment, getArguments() is not longer not null.
Use the savedInstanceState bundle instead.

Your ViewPagerAdapter class need to be extend by FragmentStatePagerAdapter instead of FragmentPagerAdapter.
Look into more details of FragmentStatePagerAdapter.

1.) Fragments hosted by a ViewPager should be created by FragmentPagerAdapter.getItem().
public class ViewPagerAdapter extends FragmentPagerAdapter {
public ViewPagerAdapter(FragmentManager fragmentManager) {
super(fragmentManager);
}
#Override
public Fragment getItem(int position) {
if(position == 0) return new MenuRecyclerViewFragment();
if(position == 1) return new MenuRecyclerViewFragment();
if(position == 2) return new MenuRecyclerViewFragment();
throw new IllegalStateException("Unexpected position " + position);
}
#Override
public int getCount() {
return 3;
}
#Override
public CharSequence getPageTitle(int position) {
if(position == 0) return "FRAG1";
if(position == 1) return "FRAG2";
if(position == 2) return "FRAG3";
throw new IllegalStateException("Unexpected position " + position);
}
}
2.) ViewPagers inside a Fragment (hosting Fragments) should be given getChildFragmentManager() instead of context.getSupportFragmentManager() for it to work.

TabLayout addOnTabSelectedListener is not working properly when I reopen the application

I am working with TabLayout which shows tab icon red according to fragment selected in ViewPager. But I have been facing this problem for 2 weeks and I have been searching a lot to resolve this issue.
The problem is if I am at fragment user account and when I close the application, my user tab icon is selected. Now when I reopen the application fragment, my tab restaurant is loaded, but the user account tab icon is still selected, although restaurant tab icon should be selected.
I have attached screenshots for reference:
user account image
restaurant image after re open
public class PagerMainActivity extends Fragment {
//This is our tablayout
public TabLayout tabLayout;
public static CustomViewPager viewPager;
AdapterPager adapter;
public int tabIconColor_Selected;
public int tabIconColor_DeSelected;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// tabSelection();
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.activity_pager, container, false);
tabLayout = (TabLayout) v.findViewById(R.id.tab_layout);
viewPager = v.findViewById(R.id.pager);
tabLayout.addTab(tabLayout.newTab().setIcon(R.drawable.restaurent).setText("Restaurant"));
tabLayout.addTab(tabLayout.newTab().setIcon(R.drawable.order).setText("Order"));
tabLayout.addTab(tabLayout.newTab().setIcon(R.drawable.deals).setText("Deals"));
tabLayout.addTab(tabLayout.newTab().setIcon(R.drawable.account).setText("Account"));
viewPager = v.findViewById(R.id.pager);
adapter = new AdapterPager(getActivity().getSupportFragmentManager(), tabLayout.getTabCount());
adapter.getRegisteredFragment(viewPager.getCurrentItem());
viewPager.setAdapter(adapter);
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
tabLayout.addOnTabSelectedListener(new TabLayout.ViewPagerOnTabSelectedListener(viewPager));
viewPager.setAllowedSwipeDirection(SwipeDirection.none);
// setupTabIcons();
tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener()
{
#Override
public void onTabSelected(TabLayout.Tab tabSelected)
{
viewPager.setCurrentItem(tabSelected.getPosition());
if(UserAccountFragment.LOG_OUT_FLAG || UserAccountFragment.LOG_IN_FLAG){
tabIconColor_Selected = ContextCompat.getColor(getContext(), R.color.colorDeal);
tabSelected.getIcon().setColorFilter(tabIconColor_Selected, PorterDuff.Mode.SRC_IN);
UserAccountFragment.LOG_OUT_FLAG=false;
UserAccountFragment.LOG_IN_FLAG=false;
}
tabIconColor_Selected = ContextCompat.getColor(getContext(), R.color.colorRed);
tabSelected.getIcon().setColorFilter(tabIconColor_Selected, PorterDuff.Mode.SRC_IN);
}
#Override
public void onTabUnselected(TabLayout.Tab tabSelected){
viewPager.setCurrentItem(tabSelected.getPosition());
tabIconColor_DeSelected = ContextCompat.getColor(getContext(), R.color.colorDeal);
tabSelected.getIcon().setColorFilter(tabIconColor_DeSelected, PorterDuff.Mode.SRC_IN);
}
#Override
public void onTabReselected(TabLayout.Tab tabSelected){
}
});
return v;
}
#Override
public void onResume() {
super.onResume();
}
#Override
public void onPause() {
super.onPause();
}
#Override
public void onStop() {
super.onStop();
}
#Override
public void onDestroyView() {
super.onDestroyView();
}
Adapter
SparseArray<Fragment> registeredFragments = new SparseArray<Fragment>();
int mNumOfTabs;
public AdapterPager(FragmentManager fragmentManager, int tabCount) {
super(fragmentManager);
this.mNumOfTabs=tabCount;
}
#Override
public Fragment getItem(int position) {
Fragment fm=null;
switch (position) {
case 0:
fm = new RestaurantsFragment();
break;
case 1:
fm = new OrdersFragment();
break;
case 2:
fm = new DealsFragment();
break;
case 3:
fm = new UserAccountFragment();
break;
}
return fm;
}
#Override
public int getCount() {
return mNumOfTabs;
}
/* #Override
public Parcelable saveState() {
// Do Nothing
return saveState();
}*/
#Override
public int getItemPosition(Object object) {
return POSITION_NONE;
}
#Override
public Object instantiateItem(ViewGroup container, int position) {
Fragment fragment = (Fragment) super.instantiateItem(container, position);
registeredFragments.put(position, fragment);
return fragment;
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
registeredFragments.remove(position);
super.destroyItem(container, position, object);
}
public Fragment getRegisteredFragment(int position) {
return registeredFragments.get(position);
}
}
Your views and solution will be appreciated. Thanks in advance

Call a method when sliding from one fragment to another

I have 2 Tabs as fragments in a ViewPager in an Activity
When I tap the second tab in the layout, the OnTabUnselected method works.
However, when I slide the screen from one tab to another, the method isn't called.
How do I achieve this calling of method by both means "Tapping as well as in a Sliding Gesture"
My Activity class is:
public class OrderActivity extends AppCompatActivity {
private Toolbar toolbar;
private TabLayout tabLayout;
private ViewPager viewPager;
private FloatingActionButton printAction;
ViewPagerAdapter adapter;
private Boolean exit = false;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_icon_text_tabs);
TypefaceUtil.overrideFont(getApplicationContext(), "serif", "fonts/opensans.tff");
//TypefaceUtil.overrideFont(getApplicationContext(), "arial", "fonts/opensans.tff");
this.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
viewPager = (ViewPager) findViewById(R.id.viewpager);
setupViewPager(viewPager);
tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(viewPager);
//setupTabIcons();
printAction = (FloatingActionButton) findViewById(R.id.float_print);
tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
#Override
public void onTabSelected(TabLayout.Tab tab) {
Toast.makeText(getApplicationContext(),"onTabSelected",Toast.LENGTH_LONG).show();
}
#Override
public void onTabUnselected(TabLayout.Tab tab) {
String ac = null;
int pos = viewPager.getCurrentItem();
Fragment activeFragment = adapter.getItem(pos);
if(pos==0){
ac= ((PersonalDetailFragment)activeFragment).getXmlValue();
}
Toast.makeText(getApplicationContext(),ac,Toast.LENGTH_LONG).show();
}
#Override
public void onTabReselected(TabLayout.Tab tab) {
Toast.makeText(getApplicationContext(),"onTabReselected",Toast.LENGTH_LONG).show();
}
});
}
private void setupViewPager(ViewPager viewPager) {
adapter = new ViewPagerAdapter(getSupportFragmentManager());
adapter.addFrag(new PersonalDetailFragment(), "Personal");
adapter.addFrag(new OrderItemsFragment(), "Invoice");
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 addFrag(Fragment fragment, String title) {
mFragmentList.add(fragment);
mFragmentTitleList.add(title);
}
#Override
public CharSequence getPageTitle(int position) {
return mFragmentTitleList.get(position);
}
}
}
Fragment A:
public class FragmentA extends Fragment {
private EditText custName;
public PersonalDetailFragment() {
// Required empty public constructor
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.personal_detail_fragment, container, false);
custName = (EditText) view.findViewById(R.id.customerContactEditText);
return view;
}
public String getXmlValue(){
return custName.getText().toString();
}
}
Fragment B:
public class FragmentB extends Fragment {
private EditText contactNo;
public PersonalDetailFragment() {
// Required empty public constructor
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.personal_detail_fragment, container, false);
contactNo = (EditText) view.findViewById(R.id.customerContactEditText);
return view;
}
}

You can use the ViewPager.addOnPageChangeListener() method to register a listener and get notified about changing the current tab with a pager swipe.
There is a really nice tutorial here.

In your fragment you can use a method named setVisibilityHint that is called every time the visibility of the fragment has been changed. There is a boolean parameter that can be true or false depending if the fragment is visible or not
#Override
public void setUserVisibleHint(boolean isVisibleToUser) {
super.setUserVisibleHint(isVisibleToUser);
}

cannot find fragment from viewpager

there is a fragment in my activity in which there is a viewpager which has 5 fragments in it and inside the main activity i need to get one of the fragment from viewpager
Activity
public class MainActivity extends AppCompatActivity {
public void setFragment(){
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
#Override
public void run() {
mainFragment= new MainFragment();
FragmentTransaction fragmentTransaction =getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.container, mainFragment,"mainFragment");
fragmentTransaction.commitAllowingStateLoss();
}
}, 250);
}
public void findFragment() {
mainFragment= (MainFragment) getSupportFragmentManager().findFragmentByTag("mainFragment");
viewPager = mainFragment.viewPager;
FragmentOne fragment = (FragmentOne) getSupportFragmentManager().findFragmentByTag("android:switcher:" + R.id.viewPager + ":" + viewPager.getCurrentItem());
}
}
MainFragment
public class MainFragment extends Fragment{
private void initViewPagerAndTabs() {
viewPager = view.findViewById(R.id.viewPager);
pagerAdapter = new PagerAdapter(getChildFragmentManager());
pagerAdapter.addFragment(FragmentOne.newInstance(), "one");
pagerAdapter.addFragment(FragmentTwo.newInstance(), "two");
pagerAdapter.addFragment(FragmentThree.newInstance(), "three");
pagerAdapter.addFragment(FragmentFour.newInstance(), "four");
pagerAdapter.addFragment(FragmentFive.newInstance(), "five");
viewPager.setAdapter(pagerAdapter);
TabLayout tabLayout = view.findViewById(R.id.tabLayout);
tabLayout.setupWithViewPager(viewPager);
viewPager.setCurrentItem(1);
viewPager.setOffscreenPageLimit(3);
}
private static class PagerAdapter extends FragmentPagerAdapter {
private final List<Fragment> fragmentList = new ArrayList<>();
private final List<String> fragmentTitleList = new ArrayList<>();
private PagerAdapter(FragmentManager fm) {
super(fm);
}
public void addFragment(Fragment fragment, String title) {
fragmentList.add(fragment);
fragmentTitleList.add(title);
}
#Override
public Fragment getItem(int position) {
return fragmentList.get(position);
}
#Override
public int getCount() {
return fragmentList.size();
}
#Override
public CharSequence getPageTitle(int position) {
return fragmentTitleList.get(position);
}
}
}
if i use "getFragmentManager()" instead of "getChildFragmentManager()" then it returns the fragment but when i use "getChildFragmentManager()" in viewPager it returns null in activity

Try this Running Code for 1 fragment, may it helps you in your code :
Main Activity
public class OpenQuran extends AppCompatActivity implements TabLayout.OnTabSelectedListener {
TabLayout tabLayoutqaue;
Pager mAdapter;
MediaPlayer mp;
//This is our viewPagerss
ViewPager viewPager;
View mWebView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_open_quran);
Toolbar mToolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(mToolbar);
getSupportActionBar().setTitle("Read Quran");
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
//Initializing the tablayout
tabLayoutqaue = (TabLayout) findViewById(R.id.tabLayoutqaue);
//Initializing viewPager
viewPager = (ViewPager) findViewById(R.id.pager);
//Creating our pager adapter
mAdapter = new Pager(getSupportFragmentManager());
// 1 Fragment
mAdapter .addFrag(new Quran(), "Quran");
viewPager.setAdapter(mAdapter);
tabLayoutqaue.setupWithViewPager(viewPager);
tabLayoutqaue.setOnTabSelectedListener(this);
}
#Override
public void onTabSelected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(TabLayout.Tab tab) {
}
#Override
public void onTabReselected(TabLayout.Tab tab) {
}
Fargment Class :
public class parahlist extends Fragment {
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
//Returning the layout file after inflating
//Change R.layout.tab1 in you classes
return inflater.inflate(R.layout.activity_parahlist, container, false);}
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
}
}
View Pager Class:
public class Pager extends FragmentPagerAdapter {
//integer to count number of tabs
int tabCount;
private final List<Fragment> mFragmentList = new ArrayList<>();
private final List<String> mFragmentTitleList = new ArrayList<>();
//Constructor to the class
public Pager(FragmentManager fm) {
super(fm);
//Initializing tab count
this.tabCount= tabCount;
}
//Overriding method getItem
#Override
public 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);
}
}
Now This the code Of MainActivity, 2nd Fragment and 3rd one is View Pager class. You dont need to change or edit your View Pager Class. Just Create Java Class and Paste that code as it is.
In Main Activity the Line : mAdapter .addFrag(new Quran(), "Quran"); adding description and Fragment. You can add your own fragment after "new".
After that you have to put Tablayout widget in you Xml as Follows:
<android.support.design.widget.TabLayout
android:id="#+id/tabLayoutqaue"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/colorgreen"
android:minHeight="?attr/actionBarSize"
app:tabIndicatorColor="#color/colorback"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"/>
And View Pager like:
<android.support.v4.view.ViewPager
android:id="#+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:adjustViewBounds="true"
/>
You may face some issue regarding tablayout :
Just put this line in your gradle build under dependecies:
compile 'com.android.support:design:25.3.1'
According to your version. for example you have 25.0.1
then line will be :
compile 'com.android.support:design:25.0.1
Still i m here to tell you more. if you got problem!

Catch the changing of slide in a ViewPager

I have implemented a ViewPager in order to swipe between two Fragments like such:
#Override
public View onCreateView(LayoutInflater inflater,
ViewGroup container, Bundle savedInstanceState) {
view = inflater.inflate(R.layout.statistics_general_vp, container, false);
mViewPager = (ViewPager) view.findViewById(R.id.pager);
mStatisticsPagerAdapter = new StatisticsPagerAdapter(getActivity().getSupportFragmentManager());
mViewPager.setAdapter(mStatisticsPagerAdapter);
return view;
}
public class StatisticsPagerAdapter extends FragmentStatePagerAdapter {
public StatisticsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int i) {
return new GeneralStatistics();
}
#Override
public int getCount() {
return NUM_PAGES;
}
}
But for now my two slides display the same Fragment.
How may I have slide 1 display Fragment 1 and slide 2 Fragment 2?

have u created fragment1 and fragment 2 seperately?? if yes then do this - in activity holding these two fragments.
private void createViewPager(ViewPager viewPager) {
Log.d("activity", "viewpager");
ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
adapter.addFrag(new Fragment1(), "");
adapter.addFrag(new Fragment2(), "");
viewPager.setAdapter(adapter);
}
create fragment like this -
public class Fragment1 extends Fragment {
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.transaction_layout, container, false);
return v;
}
}
create viewpager like this -
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 addFrag(Fragment fragment, String title) {
mFragmentList.add(fragment);
mFragmentTitleList.add(title);
}
#Override
public CharSequence getPageTitle(int position) {
return mFragmentTitleList.get(position);
}
}
or if you want to make tab with icons use this method -
private void createTabIcons() {
Log.d("activity", "createtabicons");
TextView tabOne = (TextView) LayoutInflater.from(this).inflate(R.layout.tab_item2, null);
tabOne.setText("QR Scan");
tabOne.setTypeface(MRR);
tabOne.setCompoundDrawablesWithIntrinsicBounds(0, R.drawable.image1, 0, 0);
tabOne.setCompoundDrawablePadding(5);
tabLayout.getTabAt(0).setCustomView(tabOne);
tabLayout.getTabAt(0).getCustomView().setSelected(true);
TextView tabTwo = (TextView) LayoutInflater.from(this).inflate(R.layout.tab_item2, null);
tabTwo.setText("Mobile No.");
tabTwo.setTypeface(MRR);
tabTwo.setCompoundDrawablesWithIntrinsicBounds(0, R.drawable.image3, 0, 0);
tabLayout.getTabAt(1).setCustomView(tabTwo);
tabTwo.setCompoundDrawablePadding(5);
}

Hello i show you what i doing, i got 2 fragments in mainActivity
private void addFragments() {
List<Fragment> fragments = new ArrayList<>();
chatFragment = new ChatFragment();
remoteFragment = new RemoteFragment();
fragments.add(remoteFragment);
fragments.add(chatFragment);
MyPageAdapter adapter = new MyPageAdapter(getSupportFragmentManager(), fragments);
viewPager.setAdapter(adapter);
tabLayout.setupWithViewPager(viewPager);
tabLayout.getTabAt(TAB_REMOTE_POSITION)
.setIcon(getDrawable(R.drawable.ic_settings_remote_white_24dp));
tabLayout.getTabAt(TAB_SOCIAL_POSITION)
.setIcon(getDrawable(R.drawable.ic_group_white_24dp));
}
Here is my adapter:
class MyPageAdapter extends FragmentPagerAdapter {
private List<Fragment> fragments;
public MyPageAdapter(FragmentManager fm, List<Fragment> fragments) {
super(fm);
this.fragments = fragments;
}
#Override
public Fragment getItem(int position) {
return this.fragments.get(position);
}
#Override
public int getCount() {
return this.fragments.size();
}
}
and on OnCreate u should
addFragments();
also i bind the views with ButterKnife
#Bind(R.id.view_pager)
ViewPager viewPager;
#Bind(R.id.tab_layout)
TabLayout tabLayout;
but u can static implement this with android
And remember that u have listeners:
private void pageChangeListener() {
viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageScrolled(int position, float positionOffset,
int positionOffsetPixels) {
}
#Override
public void onPageSelected(int position) {
}
#Override
public void onPageScrollStateChanged(int state) {
View view = getCurrentFocus();
if (view != null) {
InputMethodManager imm = (InputMethodManager) getSystemService
(Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(view.getWindowToken(), 0);
}
}
});
}