Develop Reference

How to refresh Fragment inside ViewPager

I have searched a lot but can't find solution which will be suitable for my code.
Actually i have tablayout in fragment and for tablayout i am using viewpager. There are 3 fragments inside viewpager. There is one spinner in my activity i want when user selects item from spinner then viewpager fragments data should be changed according to selected value but it is not updating the data.
Can anyone help to solve it. I want viewpager fragment should be refreshed whenever spinner's selected value will be changed.
My MainActivity code:
binding.bottmNav.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem menuItem) {
switch (menuItem.getItemId()) {
case R.id.location:
final AlertDialog.Builder mbuilder = new AlertDialog.Builder(HomeActivity.this);
View v = getLayoutInflater().inflate(R.layout.dialog_layout, null);
Button okbutton = v.findViewById(R.id.okbutton);
final Spinner spinner = (Spinner) v.findViewById(R.id.spinner);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(HomeActivity.this, android.R.layout.simple_spinner_item,
getResources().getStringArray(R.array.countries_list));
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
mbuilder.setView(v);
final AlertDialog dialog = mbuilder.create();
okbutton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Log.e("Dialog123", "onClick: Positive" );
SharedPreferences prfs;
prfs = PreferenceManager.getDefaultSharedPreferences(HomeActivity.this);
SharedPreferences.Editor editor = prfs.edit();
editor.putString("savedvalue", spinner.getSelectedItem().toString());
editor.commit();
String text = spinner.getSelectedItem().toString();
newsModels = new ArrayList<>();
if(text.equals("INDIA")) {
newsModels.clear();
TypedArray indianewslogo = getResources().obtainTypedArray(R.array.indianews);
String[] indianewsname = getResources().getStringArray(R.array.indianewsnames);
String[] indianewsurl = getResources().getStringArray(R.array.indiahref);
for(int i =0; i<indianewslogo.length(); i++) {
//SendModel sendModel = new SendModel(indianewslogo.getResourceId(i,0),indianewsname[i]);
newsModels.add(new NewsModel(indianewslogo.getResourceId(i,0),indianewsname[i], indianewsurl[i]));
}
Singleton.getConstant().addNewsModel(newsModels);
TypedArray indiashopimg = getResources().obtainTypedArray(R.array.indiashopimg);
String [] indishopname = getResources().getStringArray(R.array.indiashopname);
String[] indiashopurl = getResources().getStringArray(R.array.indiashopurl);
sendModels = new ArrayList<>();
for(int j =0; j<indiashopimg.length(); j++){
SendModel sendModel = new SendModel(indiashopimg.getResourceId(j,0), indishopname[j], indiashopurl[j]);
sendModels.add(sendModel);
}
SendSingleton.getConstant().addNewsModel(sendModels);
FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.frame_layout, homeFragment);
fragmentTransaction.commit();
binding.bottmNav.getMenu().findItem(R.id.location).setTitle("India");
binding.bottmNav.getMenu().findItem(R.id.home1).setChecked(true);
dialog.dismiss();
}else if(text.equals("USA")){
newsModels.clear();
TypedArray indianewslogo = getResources().obtainTypedArray(R.array.usnews);
String[] indianewsname = getResources().getStringArray(R.array.usnewsname);
String[] indianewsurl = getResources().getStringArray(R.array.usurl);
for(int i =0; i<indianewslogo.length(); i++) {
newsModels.add(new NewsModel(indianewslogo.getResourceId(i,0),indianewsname[i], indianewsurl[i]));
}
Singleton.getConstant().addNewsModel(newsModels);
Singleton.getConstant().addNewsModel(newsModels);
TypedArray indiashopimg = getResources().obtainTypedArray(R.array.usashopimg);
String [] indishopname = getResources().getStringArray(R.array.usashopname);
String[] indiashopurl = getResources().getStringArray(R.array.usashopurl);
sendModels = new ArrayList<>();
for(int j =0; j<indiashopimg.length(); j++){
SendModel sendModel = new SendModel(indiashopimg.getResourceId(j,0), indishopname[j], indiashopurl[j]);
sendModels.add(sendModel);
}
SendSingleton.getConstant().addNewsModel(sendModels);
FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.frame_layout, homeFragment);
fragmentTransaction.commit();
binding.bottmNav.getMenu().findItem(R.id.location).setTitle("USA");
binding.bottmNav.getMenu().findItem(R.id.home1).setChecked(true);
dialog.dismiss();
}
HomeFragment(Where viewpager is placed):
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
final FragmentHomeBinding homeBinding = DataBindingUtil.inflate(inflater, R.layout.fragment_home, container, false);
sendModels = new ArrayList<>();
PagerAdapter pagerAdapter = new PagerAdapter(getChildFragmentManager(), homeBinding.tablayout.getTabCount());
homeBinding.viewpager1.setAdapter(pagerAdapter);
homeBinding.tablayout.setupWithViewPager(homeBinding.viewpager1);
homeBinding.viewpager1.getAdapter().notifyDataSetChanged();
homeBinding.tablayout.addOnTabSelectedListener(new TabLayout.BaseOnTabSelectedListener() {
#Override
public void onTabSelected(TabLayout.Tab tab) {
homeBinding.viewpager1.setCurrentItem(tab.getPosition());
}#Override
public void onTabUnselected(TabLayout.Tab tab) {
}#Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
homeBinding.viewpager1.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(homeBinding.tablayout));
NewsFragment(Where i want to show the data):
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
final FragmentNewsBinding binding= DataBindingUtil.inflate(inflater, R.layout.fragment_news, container, false);
View view = binding.getRoot();
newsModels = new ArrayList<>();
newsModels =Singleton.getConstant().getNewsModel();
GridLayoutManager gridLayoutManager =new GridLayoutManager(getContext(), 4);
binding.recylerview.setLayoutManager(gridLayoutManager);
binding.recylerview.setItemAnimator(new DefaultItemAnimator());
RecyclerAdapter adapter = new RecyclerAdapter(newsModels, getContext());
binding.recylerview.setAdapter(adapter);
return view;
}
ViewPagerAdapter Code:
public class PagerAdapter extends FragmentPagerAdapter {
private Map<Integer, String> mfragmenttags;
private FragmentManager mfragmentManager;
private String[] tabtitles= new String[]{"News", "Shopping", "Social"};
private int numofTabs;
public PagerAdapter(#NonNull FragmentManager fm, int numofTabs) {
super(fm);
mfragmentManager = fm;
this.numofTabs = numofTabs;
mfragmenttags = new HashMap<Integer, String>();
}
#Nullable
#Override
public CharSequence getPageTitle(int position) {
return tabtitles[position];
}
#NonNull
#Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return new NewsFragment();
case 1:
return new ShoppingFragment();
case 2:
return new SocialFragment();
default:
return null;
}
}
#NonNull
#Override
public Object instantiateItem(#NonNull ViewGroup container, int position) {
Object obj = super.instantiateItem(container, position);
if(obj instanceof Fragment ){
Fragment f = (Fragment)obj;
String tag = f.getTag();
mfragmenttags.put(position, tag);
}
return obj;
}
public Fragment getFragment(int position){
String tag = mfragmenttags.get(position);
if(tag == null){
return null;
}
return mfragmentManager.findFragmentByTag(tag);
}
#Override
public int getItemPosition(#NonNull Object object) {
return POSITION_NONE;
}
#Override
public int getCount() {
return numofTabs;
}
}

You should put all logic code fetch data (or load data) in both place are onCreated and onNewIntent
onCreated is called in first time
onNewIntent is called when u show again that fragment
Hope this help!

Create public methods refresh() inside your fragments that you want to refresh. Add the below code to call refresh() inside your setOnItemSelectedListener of the spinner
for (Fragment fragment : getChildFragmentManager().getFragments()) {
if (fragment instanceof NewsFragment) {
((NewsFragment) fragment).refresh(); //add refresh method in fragment
}
}

Not getting current selected Tab position in android tablayout

I am creating a Tab based application where the user can create tabs by clicking a button and can delete the tabs by clicking another button. I implemented this using Tab layout, Fragments and Viewpager.
I am able to get the current tab position when new tab is created by the function setuptablyout function. But when i clicked another tab ie moving to other tabs I am not able to toast the position.
I found that using tabLayout.addOnTabSelectedListener I can get the position, while that doesn't work here.
my Activity Code is:
public class MainActivity extends AppCompatActivity{
TextView textView;
private TabLayout tabLayout;
public static ViewPager viewPager;
public static ViewPagerAdapter adapter;
private ImageView add;
int selectedTabPosition;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
viewPager = (ViewPager)findViewById(R.id.my_viewpager);
tabLayout = (TabLayout) findViewById(R.id.my_tab_layout);
add= (ImageView) findViewById(R.id.imageButtonAdd1);
adapter = new ViewPagerAdapter(getSupportFragmentManager(), MainActivity.this, viewPager, tabLayout);
viewPager.setAdapter(adapter);
createFirstFragment("POS "+adapter.getCount());
tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
#Override
public void onTabSelected(TabLayout.Tab tab) {
Toast.makeText(getApplicationContext(),"Pos onTabSelected: "+ tabLayout.getSelectedTabPosition(),Toast.LENGTH_SHORT).show();
}
#Override
public void onTabUnselected(TabLayout.Tab tab) {
}
#Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
add.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(adapter.getCount() > 4){
Toast.makeText(MainActivity.this, "Only 5 Tabs allowed", Toast.LENGTH_SHORT).show();
}
else {
Bundle bundle = new Bundle();
bundle.putString("data", "POS "+adapter.getCount());
FragmentChild fragmentChild = new FragmentChild();
fragmentChild.setArguments(bundle);
adapter.addFrag(fragmentChild, "POS "+adapter.getCount());
adapter.notifyDataSetChanged();
if (adapter.getCount() > 0) tabLayout.setupWithViewPager(viewPager);
Log.e("adapter.getCount()",String.valueOf(adapter.getCount()));
viewPager.setCurrentItem(adapter.getCount() - 1);
setupTabLayout();
}
}
});
}
public void createFirstFragment(String pagename) {
Bundle bundle = new Bundle();
bundle.putString("data", pagename);
FragmentChild fragmentChild = new FragmentChild();
fragmentChild.setArguments(bundle);
adapter.addFrag(fragmentChild, pagename);
adapter.notifyDataSetChanged();
if (adapter.getCount() > 0) tabLayout.setupWithViewPager(viewPager);
Log.e("adapter.getCount()",String.valueOf(adapter.getCount()));
viewPager.setCurrentItem(adapter.getCount() - 1);
setupTabLayout();
}
public void setupTabLayout() {
selectedTabPosition = viewPager.getCurrentItem();
Toast.makeText(MainActivity.this, "selectedTabPosition --> "+selectedTabPosition, Toast.LENGTH_SHORT).show();
for (int i = 0; i < tabLayout.getTabCount(); i++) {
tabLayout.getTabAt(i).setCustomView(adapter.getTabView(i));
}
}
}
ViewPager class:
public class ViewPagerAdapter extends FragmentPagerAdapter {
private final ArrayList<Fragment> mFragmentList = new ArrayList<>();
private final ArrayList<String> mFragmentTitleList = new ArrayList<>();
Context context;
ViewPager viewPager;
TabLayout tabLayout;
int selectedTabPosition;
PreferenceHelper prefs;
private Map<Integer, String> mFragmentTags;
private FragmentManager mFragmentManager;
private boolean doNotifyDataSetChangedOnce = false;
public ViewPagerAdapter(FragmentManager manager, Context context, ViewPager viewPager,
TabLayout tabLayout) {
super(manager);
this.context = context;
this.viewPager = viewPager;
this.tabLayout = tabLayout;
mFragmentTags = new HashMap<Integer, String>();
prefs = new PreferenceHelper(context);
}
#Override
public Fragment getItem(int position) {
return mFragmentList.get(position);
}
#Override
public int getCount() {
if (doNotifyDataSetChangedOnce) {
doNotifyDataSetChangedOnce = false;
notifyDataSetChanged();
}
return mFragmentList.size();
}
public void addFrag(Fragment fragment, String title) {
mFragmentList.add(fragment);
mFragmentTitleList.add(title);
}
public void removeFrag(int position) {
removeTab(position);
Fragment fragment = mFragmentList.get(position);
mFragmentList.remove(fragment);
mFragmentTitleList.remove(position);
//destroyFragmentView(viewPager, position, fragment);
notifyDataSetChanged();
Log.e("getCount()", String.valueOf(getCount()));
if (getCount() > 0)
tabLayout.setupWithViewPager(viewPager);
setupTabLayout();
}
public View getTabView(final int position) {
View view = LayoutInflater.from(context).inflate(R.layout.custom_tab_item, null);
TextView tabItemName = (TextView) view.findViewById(R.id.textViewTabItemName);
ImageView tabItemAvatar =
(ImageView) view.findViewById(R.id.imageViewTabItemAvatar);
ImageButton remove = (ImageButton) view.findViewById(R.id.imageButtonRemove);
if(getCount() == 1){
remove.setVisibility(View.INVISIBLE);
}
else{
remove.setVisibility(View.VISIBLE);
}
remove.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Log.d("Remove", "Remove");
if(getCount() != 1){
removeFrag(position);
}
else{
// Toast.makeText("Atleast One Tab is requied")
}
}
});
tabItemName.setText(mFragmentTitleList.get(position));
tabItemName.setTextColor(context.getResources().getColor(android.R.color.background_light));
tabItemAvatar.setImageResource(R.drawable.boy);
return view;
}
public void setupTabLayout() {
selectedTabPosition = viewPager.getCurrentItem();
Toast.makeText(context, "selectedTabPosition --> "+selectedTabPosition, Toast.LENGTH_SHORT).show();
for (int i = 0; i < tabLayout.getTabCount(); i++) {
tabLayout.getTabAt(i).setCustomView(getTabView(i));
}
}
public void removeTab(int position) {
if (tabLayout.getChildCount() > 0 && tabLayout!=null) {
tabLayout.removeTabAt(position);
prefs.remove("POS"+position);
}
}
/*#Override
public void setPrimaryItem(ViewGroup container, int position, Object object) {
if (mCurrentFragment != object) {
mCurrentFragment = (Fragment) object;
}
super.setPrimaryItem(container, position, object);
}*/
#Override
public Object instantiateItem(ViewGroup container, int position) {
Object object = super.instantiateItem(container, position);
if (object instanceof Fragment) {
Fragment fragment = (Fragment) object;
String tag = fragment.getTag();
mFragmentTags.put(position, tag);
}
return object;
}
public Fragment getFragment(int position) {
Fragment fragment = null;
String tag = mFragmentTags.get(position);
if (tag != null) {
fragment = mFragmentManager.findFragmentByTag(tag);
}
return fragment;
}
#Override
public int getItemPosition(Object object) {
return POSITION_NONE;
}
#Override
public CharSequence getPageTitle(int position) {
return mFragmentTitleList.get(position);
}
}
I am getting this weird behaviour that whenever I create new tabs the onTabSelected functions are calling multiple time that even when I create 3rd tab onTabslected toast shows Pos onTabSelected: 0,1 and not the just 2nd position which is supposed to be the 2nd position. What can I do to solve this?
My intention is to get some unique tab id so that I can identify each tab separately

you just create the newInstance constructor for creating fragment with arguments
in your FragmentChild
public static FragmentChild newInstance(int page, String title) {
FragmentChild fragmentChild = new FragmentChild ();
Bundle args = new Bundle();
args.putInt("someInt", page);
args.putString("someTitle", title);
fragmentChild.setArguments(args);
return fragmentChild;
}
// Store instance variables based on arguments passed
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
page = getArguments().getInt("someInt", 0);
title = getArguments().getString("someTitle");
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_first, container, false);
TextView tvLabel = (TextView) view.findViewById(R.id.tvLabel);
tvLabel.setText(page + " -- " + title);
return view;
}
And then after in adapter class change this.
#Override
public Fragment getItem(int position) {
return mFragmentList.get(position);
}
to
#Override
public Fragment getItem(int position) {
return FragmentChild.newInstance(position, "Page # 1");
}
I have not tested this code but, I think this code will help you to get your unique tab id..
test this code and let me know if it works

Not able to Update fragments text while swaping cards

I am working on a card swipe and card flip functionality and I am using ViewPager and fragments.
My problem is I am not able to update TextView inside fragments as I swipe the card from left to right or right to left but when I flip the card it update the UI.
I tried everything which is available over Internet but none of the soltuion is working for me.
I am following this link https://github.com/jamesmccann/android-view-pager-cards
Here is my code
public class CardContainerFragment extends Fragment {
private boolean cardFlipped = false;
static TextView textview;
public CardContainerFragment() {
setHasOptionsMenu(true);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_card_container, container, false);
LinearLayout ll = (LinearLayout)rootView.findViewById(R.id.layout);
rootView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
flipCard();
}
});
getChildFragmentManager()
.beginTransaction()
.add(R.id.container, new CardFrontFragment())
.commit();
Message msg = handler.obtainMessage();
msg.arg1 = 1;
handler.sendMessage(msg);
return rootView;
}
final Handler handler = new Handler(){
#Override
public void handleMessage(Message msg) {
int page = CardActivity.mViewPager.getCurrentItem();
int page_index = page+1;
String current_page = page_index + " of " + card_activity.deck_map.size();
CardActivity.tv.setText(current_page);
super.handleMessage(msg);
}
};
public void flipCard() {
Fragment newFragment = null;
Message msg = handler.obtainMessage();
msg.arg1 = 1;
handler.sendMessage(msg);
if (cardFlipped) {
newFragment = new CardFrontFragment();
} else {
newFragment = new CardBackFragment();
}
getChildFragmentManager()
.beginTransaction()
.setCustomAnimations(
R.animator.card_flip_right_in, R.animator.card_flip_right_out,
R.animator.card_flip_left_in, R.animator.card_flip_left_out)
.replace(R.id.container, newFragment)
.commit();
cardFlipped = !cardFlipped;
}
public static class CardFrontFragment extends Fragment {
public CardFrontFragment() { }
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_card, container, false);
textview = (TextView)rootView.findViewById(R.id.card_front);
String card_front_string = card_activity.arraylst.get(CardActivity.mViewPager.getCurrentItem());
Log.e("current Item",CardActivity.mViewPager.getCurrentItem()+"");
String complete_text = card_front_string +" \n \n + \n Tap now to flip this card.";
textview.setText(complete_text);
return rootView;
}
}
public static class CardBackFragment extends Fragment {
public CardBackFragment() { }
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_card_back, container, false);
TextView textview = (TextView)rootView.findViewById(R.id.card_back);
textview.setMovementMethod(new ScrollingMovementMethod());
String card_front_string = card_activity.arraylst.get(CardActivity.mViewPager.getCurrentItem());
String deck_data = card_activity.deck_map.get(card_front_string);
textview.setText(deck_data);
return rootView;
}
}
Here is my adapter code
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
try {
setContentView(R.layout.card_example);
tv = (TextView)findViewById(R.id.tv_card_number);
tv1 = (TextView)findViewById(R.id.tv_card_index);
FragmentManager m = getFragmentManager();
CardPagerAdapter adapter = new CardPagerAdapter(m);
index = getIntent().getStringExtra("index");
card_activity.cardCounter = Integer.parseInt(index);
int count = card_activity.cardCounter;
int final_count = count+1;
String current_page = final_count+" of "+card_activity.deck_map.size();
//CardActivity.tv.setText(current_page);
mViewPager = (ViewPager) findViewById(R.id.view_pager);
// mViewPager.setAllowedSwipeDirection(CustomViewPager.SwipeDirection.all);
mViewPager.setAdapter(adapter);
mViewPager.setCurrentItem(card_activity.cardCounter);
//mViewPager.setOffscreenPageLimit(1);
//mViewPager.setOnPageChangeListener(new pagechangelistener())
//Log.e("current Item",CardActivity.mViewPager.getCurrentItem()+"");
}catch(Exception e){
e.printStackTrace();
}
}
public class CardPagerAdapter extends android.support.v13.app.FragmentStatePagerAdapter {
public CardPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int i) {
mViewPager.setOffscreenPageLimit(0);
int page = mViewPager.getCurrentItem();
int page_index = page+1;
String current_page = " of " + card_activity.deck_map.size();
tv.setText(current_page);
tv1.setText(String.valueOf(page_index));
CardContainerFragment cardContainerFragment = new CardContainerFragment();
cardContainerFragment.current_index_front = page;
cardContainerFragment.current_index_back = page;
String card_front_string = card_activity.arraylst.get(page);
CardContainerFragment.complete_text_front = card_front_string +" \n \n + \n Tap now to flip this card.";
Bundle b = new Bundle();
b.putInt("index",page);
CardContainerFragment.complete_text_back = card_activity.deck_map.get(card_front_string);
cardContainerFragment.setArguments(b);
return cardContainerFragment;
}
#Override
public int getCount() {
int len = card_activity.deck_map.size();
return len;
}
#Override
public int getItemPosition(Object object) {
return POSITION_NONE;
}
}
Please let me know what I am doing wrong here.
Thanks in advance

Finally I am able to do this with some efforts.
After searching, I get to know that getItems (The method in CardPagerAdapter) is called two times because Android creates one extra fragments for smooth transition and I was sending or getting wrong position of fragments from getItems.
By letting the android to create one extra fragment and by sending correct position I am able to solve this issue.
Here is my updated code
public class CardActivity extends android.support.v4.app.FragmentActivity {
public TextView tv;
public static String index=null;
public static ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
try {
setContentView(R.layout.card_example);
tv = (TextView)findViewById(R.id.tv_card_number);
FragmentManager m = getFragmentManager();
CardPagerAdapter adapter = new CardPagerAdapter(m);
index = getIntent().getStringExtra("index");
card_activity.cardCounter = Integer.parseInt(index);
int count = card_activity.cardCounter;
int final_count = count+1;
String current_page = final_count+" of "+card_activity.deck_map.size();
mViewPager = (ViewPager) findViewById(R.id.view_pager);
mViewPager.setOffscreenPageLimit(0);
mViewPager.setAdapter(adapter);
mViewPager.setCurrentItem(card_activity.cardCounter);
String current_page_temp =final_count+" of " + card_activity.deck_map.size();
tv.setText(current_page_temp);
mViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
#Override
public void onPageSelected(int position) {
Log.e("aaa",position+"");
String current_page = position+1 + " of " + card_activity.deck_map.size();
tv.setText(current_page);
}
#Override
public void onPageScrollStateChanged(int state) {
}
});
}catch(Exception e){
e.printStackTrace();
}
}
public class CardPagerAdapter extends android.support.v13.app.FragmentStatePagerAdapter {
public CardPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int i) {
CardContainerFragment cardContainerFragment = new CardContainerFragment();
Bundle b = new Bundle();
b.putInt("index",i);
cardContainerFragment.setArguments(b);
return cardContainerFragment;
}
#Override
public int getCount() {
int len = card_activity.deck_map.size();
return len;
}
#Override
public int getItemPosition(Object object) {
return POSITION_NONE;
}
}
}
==================================================================
public class CardContainerFragment extends Fragment {
private boolean cardFlipped = false;
int current_index=0;
static int pos = 0;
public CardContainerFragment() {
/*setHasOptionsMenu(true);*/
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_card_container, container, false);
LinearLayout ll = (LinearLayout)rootView.findViewById(R.id.layout);
rootView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
flipCard();
}
});
pos = getArguments().getInt("index");
getChildFragmentManager()
.beginTransaction()
.add(R.id.container, new CardFrontFragment().newInstance(pos))
.commit();
card_activity.tempCounter = card_activity.tempCounter+1;
return rootView;
}
public void flipCard() {
Fragment newFragment = null;
CardFrontFragment cardFrontFragment = null;
CardBackFragment cardBackFragment = null;
if (cardFlipped) {
newFragment = CardFrontFragment.newInstance(CardActivity.mViewPager.getCurrentItem());
} else {
newFragment = cardBackFragment.newInstance(CardActivity.mViewPager.getCurrentItem());
}
getChildFragmentManager()
.beginTransaction()
.setCustomAnimations(
R.animator.card_flip_right_in, R.animator.card_flip_right_out,
R.animator.card_flip_left_in, R.animator.card_flip_left_out)
.replace(R.id.container, newFragment)
.commit();
cardFlipped = !cardFlipped;
}
public static class CardBackFragment extends Fragment {
public CardBackFragment() { }
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView_back = inflater.inflate(R.layout.fragment_card_back, container, false);
TextView textview_back = (TextView)rootView_back.findViewById(R.id.card_back);
textview_back.setMovementMethod(new ScrollingMovementMethod());
String text = getArguments().getString("back_text");
textview_back.setText(text);
return rootView_back;
}
static CardBackFragment newInstance(int position) {
CardBackFragment cardBackFragment = new CardBackFragment();
Bundle args = new Bundle();
String card_front_string = card_activity.arraylst.get(position);
String text = card_activity.deck_map.get(card_front_string);
args.putString("back_text", text);
cardBackFragment.setArguments(args);
return cardBackFragment;
}
}
public static class CardFrontFragment extends Fragment {
public CardFrontFragment() { }
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView_front = null;
rootView_front = inflater.inflate(R.layout.fragment_card, container, false);
TextView textview_front = (TextView)rootView_front.findViewById(R.id.card_front);
String text = getArguments().getString("front_text");
textview_front.setText(text);
return rootView_front;
}
static CardFrontFragment newInstance(int position) {
CardFrontFragment cardFrontFragment = new CardFrontFragment();
Bundle args = new Bundle();
String card_front_string = card_activity.arraylst.get(position);
String text = card_front_string +" \n \n + \n Tap now to flip this card.";
args.putString("front_text", text);
cardFrontFragment.setArguments(args);
return cardFrontFragment;
}
}
}

As #david-rawson says
Don't use static fields CardActivity.mViewPager. See https://developer.android.com/guide/components/fragments.html#CommunicatingWithActivity
Reason for this is that the ViewPager might/will create the views of your fragments before they are displayed to ensure you get that smooth animation that people love ViewPagers for. So the mViewPager calls a number of fragments createView() function at the same time, and at that time the mViewPager has an index for .getCurrentItem() which goes to the CardContainer on the page being viewed.
A better option would be for you to pass CardContainerFragment a String argument with the value for "completeText" which you want it to display whenever it creates either CardBackFragment or CardFrontFragment.
Go through this for more details.

You just have to set data to text view which is used in CardFrontFragment.
Here when ever a swipe happens onCreateView() of CardContainerFragment is called.
You are adding CardFrontFragment every time when onCreateView() is called. you need to use text view of CardFrontFragment instead of using textview of activity.
Just replace CardActivity.tv.setText(current_page);
with textView.setText(current_page);
Make sure the textview you have used in CardFrontFragment is available at class level.
you are using static fragments so textview must be static.
private static TextView textView=null;
Hope this will work for you :)

Have you tried this:
tv.post(new Runnable() {
#Override
public void run() {
CardActivity.tv.setText(current_page);
}
});

I did something similar wihtin my App, and I manage the display of my TextView into the OnCreateView, with a switch case.
I tried to implent your code but did not have all your materials (like custom animator).
You should then try something like that:
public class CardContainerFragment extends AppCompatActivity {
private boolean cardFlipped = false;
static TextView textview;
/*public CardContainerFragment() {
setHasOptionsMenu(true);
}*/
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.your_activity_name);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
// Create the adapter that will return a fragment for each of the three
// primary sections of the activity.
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
// Set up the ViewPager with the sections adapter.
/*
The {#link ViewPager} that will host the section contents.
*/
ViewPager mViewPager = (ViewPager) findViewById(R.id.container);
mViewPager.setAdapter(mSectionsPagerAdapter);
mViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
// This method will be invoked when a new page becomes selected.
#Override
flipCard();
#Override
public void onPageSelected(int position) {
}
// This method will be invoked when the current page is scrolled
#Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
// Code goes here
}
// Called when the scroll state changes:
// SCROLL_STATE_IDLE, SCROLL_STATE_DRAGGING, SCROLL_STATE_SETTLING
#Override
public void onPageScrollStateChanged(int state) {
// Code goes here
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_welcome, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/
private static final String ARG_SECTION_NUMBER = "section_number";
public PlaceholderFragment() {
}
/**
* Returns a new instance of this fragment for the given section
* number.
*/
public static PlaceholderFragment newInstance(int sectionNumber) {
PlaceholderFragment fragment = new PlaceholderFragment();
Bundle args = new Bundle();
args.putInt(ARG_SECTION_NUMBER, sectionNumber);
fragment.setArguments(args);
return fragment;
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
//Initializing data
Context context = getContext();
View rootView = inflater.inflate(R.layout.fragment_card, container, false);
TextView textView = (TextView) rootView.findViewById(R.id.txtView);
int fragment = getArguments().getInt(ARG_SECTION_NUMBER);
switch (fragment)
{
case 1: //front card
String card_front_string = card_activity.arraylst.get(CardActivity.mViewPager.getCurrentItem());
Log.e("current Item",CardActivity.mViewPager.getCurrentItem()+"");
String complete_text = card_front_string +" \n \n + \n Tap now to flip this card.";
textview.setText(complete_text);
getChildFragmentManager()
.beginTransaction()
.add(R.id.container, new CardFrontFragment())
.commit();
Message msg = handler.obtainMessage();
msg.arg1 = 1;
handler.sendMessage(msg);
return rootView;
case 2: //back card
TextView textview = (TextView)rootView.findViewById(R.id.card_back);
textview.setMovementMethod(new ScrollingMovementMethod());
String card_front_string = card_activity.arraylst.get(CardActivity.mViewPager.getCurrentItem());
String deck_data = card_activity.deck_map.get(card_front_string);
textview.setText(deck_data);
getChildFragmentManager()
.beginTransaction()
.add(R.id.container, new CardFrontFragment())
.commit();
Message msg = handler.obtainMessage();
msg.arg1 = 1;
handler.sendMessage(msg);
return rootView;
default:
return rootView;
}
}
}
final Handler handler = new Handler(){
#Override
public void handleMessage(Message msg) {
int page = CardActivity.mViewPager.getCurrentItem();
int page_index = page+1;
String current_page = page_index + " of " + card_activity.deck_map.size();
CardActivity.tv.setText(current_page);
super.handleMessage(msg);
}
};
public void flipCard() {
Message msg = handler.obtainMessage();
msg.arg1 = 1;
handler.sendMessage(msg);
getChildFragmentManager()
.beginTransaction()
.setCustomAnimations(
R.animator.card_flip_right_in, R.animator.card_flip_right_out,
R.animator.card_flip_left_in, R.animator.card_flip_left_out)
.replace(R.id.container, newFragment)
.commit();
}
/**
* A {#link FragmentPagerAdapter} that returns a fragment corresponding to
* one of the sections/tabs/pages.
*/
public class SectionsPagerAdapter extends FragmentPagerAdapter {
SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
// Return a PlaceholderFragment (defined as a static inner class below).
return PlaceholderFragment.newInstance(position + 1);
}
#Override
public int getCount() {
// Show 2 total pages.
return 2;
}
#Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return "SECTION 1";
case 1:
return "SECTION 2";
}
return null;
}
}
The textView is displayed on your page, and when selecting the change, the content of your textview will be changed.

Show a detail fragment when clicking an item in a ListFragment in Android Studio

My app has a tab bar that should be visible at all times. The first tab contains a ListFragment. When I click on an item within, it loads a new activity that creates a detail fragment displaying the contents of the object in the list. I would like to display this content without having to start a new activity because it also destroys the tab bar!
Any help would be greatly appreciated!
To illustrate, here are some screenshots and code:
This is the code for the FragmentActivity that creates the tabs:
public class MainFragmentActivity extends FragmentActivity
implements ActionBar.TabListener {
SectionsPagerAdapter sectionsPagerAdapter = null;
ViewPager viewPager = null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final ActionBar actionBar = getActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
getActionBar().setDisplayShowHomeEnabled(false);
getActionBar().setDisplayShowTitleEnabled(false);
sectionsPagerAdapter =
new SectionsPagerAdapter
(
getSupportFragmentManager());
viewPager = (ViewPager) findViewById(R.id.pager);
viewPager.setAdapter(sectionsPagerAdapter);
viewPager.setOnPageChangeListener(
new ViewPager.SimpleOnPageChangeListener() {
#Override
public void onPageSelected(int position) {
actionBar.setSelectedNavigationItem(position);
}
}); // End of sectionPageAdapter.
Tab browseTab = actionBar.newTab();
browseTab.setIcon(R.drawable.search);
browseTab.setTabListener(this);
actionBar.addTab(browseTab);
Tab myStuffTab = actionBar.newTab();
myStuffTab.setIcon(R.drawable.my_stuff);
myStuffTab.setTabListener(this);
actionBar.addTab(myStuffTab);
Tab profileTab = actionBar.newTab();
profileTab.setIcon(R.drawable.profile);
profileTab.setTabListener(this);
actionBar.addTab(profileTab);
Tab settingsTab = actionBar.newTab();
settingsTab.setIcon(R.drawable.settings);
settingsTab.setTabListener(this);
actionBar.addTab(settingsTab);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public void onTabSelected(ActionBar.Tab tab,
FragmentTransaction fragmentTransaction) {
viewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
#Override
public void onTabReselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
public class SectionsPagerAdapter extends FragmentStatePagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
switch (position) {
case 0:
Fragment browseFragment = new BrowseFragment();
Bundle browseArgs = new Bundle();
browseArgs.putInt(BrowseFragment.sectionNumberKey, position + 1);
browseFragment.setArguments(browseArgs);
return browseFragment;
case 1:
Fragment myStuffFragment = new MyStuffFragment();
Bundle myStuffArgs = new Bundle();
myStuffArgs.putInt(BrowseFragment.sectionNumberKey, position + 1);
myStuffFragment.setArguments(myStuffArgs);
return myStuffFragment;
case 2:
Fragment profileFragment = new ProfileFragment();
Bundle profileArgs = new Bundle();
profileArgs.putInt(BrowseFragment.sectionNumberKey, position + 1);
profileFragment.setArguments(profileArgs);
return profileFragment;
case 3:
Fragment settingsFragment = new SettingsFragment();
Bundle settingsArgs = new Bundle();
settingsArgs.putInt(BrowseFragment.sectionNumberKey, position + 1);
settingsFragment.setArguments(settingsArgs);
return settingsFragment;
}
return null;
}
// There are always 4 tabs
#Override
public int getCount() {
return 4;
}
// Return a CharSequence for the selected tab
#Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return getString(R.string.title_section1).toUpperCase();
case 1:
return getString(R.string.title_section2).toUpperCase();
case 2:
return getString(R.string.title_section3).toUpperCase();
case 3:
return getString(R.string.title_section4).toUpperCase();
}
return null;
}
}
} // End of class.
This is the code for the first tab:
public class BrowseFragment extends ListFragment {
public static String sectionNumberKey = "sec_num";
private String activityName = "Browse";
int currentPosition = 0;
List<Listing> listings = new ListingData().getListings();
public BrowseFragment() {}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
BrowseArrayAdapter adapter = new BrowseArrayAdapter(getActivity(),
R.layout.browselist_item,
listings);
setListAdapter(adapter);
}
#Override
public View onCreateView(LayoutInflater inflater,
ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_browse,
container, false);
TextView tv = (TextView) rootView.findViewById(R.id.section_label);
int intSectionNumber = getArguments().getInt(sectionNumberKey);
String numAsString = Integer.toString(intSectionNumber);
tv.setText(numAsString);
activityName += " " + numAsString;
return rootView;
}
#Override
public void onListItemClick(ListView l, View v, int position, long id) {
showDetails(position);
}
void showDetails(int index) {
currentPosition = index;
Intent intent = new Intent();
intent.setClass(getActivity(), BrowseDetailsActivity.class);
intent.putExtra("index", index);
startActivity(intent);
}
And here is the code for the Detail Activity:
public class BrowseDetailsActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (savedInstanceState == null) {
// During initial setup, plug in the details fragment.
BrowseDetailFragment details = new BrowseDetailFragment();
details.setArguments(getIntent().getExtras());
getFragmentManager().beginTransaction().add(android.R.id.content, details).commit();
}
}
}

Basicly you just have to use the content of the onCreate method from your BrowseDetailActivity in the showDetails method of your BrowseFragment. In this way, you can drop your BrowseDetailsActivity.
BrowseFragment.java
void showDetails(int index) {
BrowseDetailFragment details = BrowseDetailFragment.newInstance(index);
getChildFragmentManager().beginTransaction().add(details).commit();
}
And use the static newInstance method inside your BrowseDetailFragment like so:
BrowseDetailFragment.java
public class BrowseDetailFragment extends Fragment {
private int position;
public static BrowseDetailFragment newInstance(int position) {
BrowseDetailFragment fragment = new BrowseDetailFragment();
fragment.position = position;
return fragment;
}
public BrowseDetailFragment() {
//Required empty constructor
}
//Lifecycle methods and logics
}
Make sure to provide some navigation option so users can return to your list.

Custom Menu change option menu in different fragments?

Fragment with Custom menu :
can I fragment change how to menu change ?Fragment B is equals like above with different inflate XML menu Menu work ImageView menuView onClick
and fragment change change menu list name
public class BizForumFragment extends Fragment implements View.OnClickListener{
private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";
private String mParam1;
private String mParam2;
ImageView menuView;
Context context;
RequestParse requestParse;
PagerAdapter adapter;
ViewPager viewPager;
public BizForumFragment() {
}
public static BizForumFragment newInstance(String param1, String param2) {
BizForumFragment fragment = new BizForumFragment();
Bundle args = new Bundle();
args.putString(ARG_PARAM1, param1);
args.putString(ARG_PARAM2, param2);
fragment.setArguments(args);
return fragment;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
mParam1 = getArguments().getString(ARG_PARAM1);
mParam2 = getArguments().getString(ARG_PARAM2);
}
context = this.getContext();
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view=inflater.inflate(R.layout.fragment_biz_forum, container, false);
viewPager = (ViewPager) view.findViewById(R.id.viewpager);
adapter = new PagerAdapter(getChildFragmentManager(), getContext());
viewPager.setAdapter(adapter);
menuView = (ImageView) view.findViewById(R.id.menuView);
menuView.setOnClickListener(this);
final TabLayout tabLayout = (TabLayout) view.findViewById(R.id.tabs);
tabLayout.setupWithViewPager(viewPager);
for (int i = 0; i < tabLayout.getTabCount(); i++) {
TabLayout.Tab tab = tabLayout.getTabAt(i);
tab.setCustomView(adapter.getTabView(i));
}
return view;
}
#Override
public void onClick(View v) {
PopupMenu popup = new PopupMenu(getContext(), menuView);
popup.getMenuInflater().inflate(R.menu.article_menu, popup.getMenu());
popup.show();
}
class PagerAdapter extends FragmentStatePagerAdapter {
String tabTitles[] = getResources().getStringArray(R.array.myLinks);
Context context;
public PagerAdapter(FragmentManager fm, Context context) {
super(fm);
this.context = context;
}
#Override
public int getCount() {
return tabTitles.length;
}
#Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return new ArticlesFragment();
case 1:
return new DiscussionFragment();
case 2:
return new NewsFragment();
}
return null;
}
#Override
public CharSequence getPageTitle(int position) {
// Generate title based on item position
return tabTitles[position];
}
public View getTabView(int position) {
View tab = LayoutInflater.from(getContext()).inflate(R.layout.tab_text_layout, null);
TextView tv = (TextView) tab.findViewById(R.id.custom_text);
tv.setText(tabTitles[position]);
return tab;
}
}
}

Previously, I had a similar problem. I announced in the class of fragments updateToolbar() method and called it in ViewPager.OnPageChangeListener for the selected fragment.
In the method updateToolbar() I called the following code:
getActivity().supportInvalidateOptionsMenu();
After that occurred re-inflating of menu resources.
You can find my example here