Develop Reference

Tab Automatically redirect to first tab on data change of third tab

Hi I am using Tablayout in my
TAB1 TAB2 TAB3
When I open the app, by default TAB1 is selected. All the TABs have recyclerview. Now I have one FAB button for all the fragments. I am using FAB button for changing language.
Whenever user change language data will display as per language selection. Now issue is When I am on TAB3 and changing language instead of staying on TAB3 it goes to TAB1.
Can any one help me to solve this issue.
public class LibraryFragment extends Fragment {
private static final String TAG = LibraryFragment.class.getSimpleName();
private TabLayout tabLayout;
private ViewPager viewPager;
private String catid;
private FragmentManager fragmentManager;
private String SELECTED_ACTION;
private String SELECTED_LANGUAGE,SELECTED_LANGUAGENM,sel_cat;
private int VID_CODE;
private FloatingActionButton fab;
private ArrayList<LanguageModel> langList;
public LibraryFragment() {
}
#RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_library, container, false);
langList = (ArrayList<LanguageModel>) getArguments().getSerializable("langlist");
catid = getArguments().getString("frommusic");
SELECTED_ACTION = getArguments().getString("action");
SELECTED_LANGUAGE = getArguments().getString("sel_lang");
SELECTED_LANGUAGENM = getArguments().getString("sel_langnm");
sel_cat = getArguments().getString("sel_cat");
System.out.println("in library" + SELECTED_LANGUAGE);
tabLayout = (TabLayout) view.findViewById(R.id.tabs);
viewPager = (ViewPager) view.findViewById(R.id.view_pager);
viewPager.setAdapter(new CustomFragmentPageAdapter(getChildFragmentManager()));
tabLayout.setupWithViewPager(viewPager);
fab = (FloatingActionButton) view.findViewById(R.id.fabChat);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
setdailog();
}
});
return view;
}
public void setdailog()
{
final Dialog cpDialog = new Dialog(getActivity());
cpDialog.setTitle("Select Language");
cpDialog.setContentView(R.layout.alert_list);
ListView listView = (ListView) cpDialog.findViewById(R.id.listiview_lang);
AlertListAdapter mAdapter = new AlertListAdapter(langList, getActivity());
listView.setAdapter(mAdapter);
listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
SELECTED_LANGUAGE = langList.get(position).getLangid();
System.out.println("JO JO"+SELECTED_LANGUAGE);
Intent intent=new Intent(getActivity(),MusicActivity.class);
intent.putExtra("langlist",langList);
intent.putExtra("selid",catid);
intent.putExtra("langid",SELECTED_LANGUAGE);
intent.putExtra("langname",langList.get(position).getLangname());
intent.putExtra("selcat",sel_cat);
startActivity(intent);
cpDialog.dismiss();
}
});
cpDialog.show();
}
public class AlertListAdapter extends BaseAdapter {
ArrayList<LanguageModel> mData;
Context mContext;
LayoutInflater inflater;
public AlertListAdapter(ArrayList<LanguageModel> data, Context context) {
mData = data;
mContext = context;
inflater = LayoutInflater.from(context);
}
#Override
public int getCount() {
return mData.size();
}
#Override
public Object getItem(int arg0) {
return null;
}
#Override
public long getItemId(int arg0) {
// TODO Auto-generated method stub
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater mInflater = (LayoutInflater) mContext
.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
convertView = mInflater.inflate(R.layout.item_alert_list, null);
}
TextView tvTitle = (TextView) convertView.findViewById(R.id.textView_languge);
tvTitle.setText(mData.get(position).getLangname());
return convertView;
}
}
public class CustomFragmentPageAdapter extends FragmentPagerAdapter {
private final String TAG = CustomFragmentPageAdapter.class.getSimpleName();
private static final int FRAGMENT_COUNT = 3;
public CustomFragmentPageAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
switch (position){
case 0:
Fragment f1 = new SongFragment();
Bundle args1 = new Bundle();
args1.putString("fromlibfrag", catid);
args1.putString("action", SELECTED_ACTION);
args1.putString("sel_lang", SELECTED_LANGUAGE);
args1.putSerializable("langlist",langList);
f1.setArguments(args1);
return f1;
case 1:
Fragment f2 = new PhotoFragment();
Bundle args2 = new Bundle();
args2.putString("fromlibfrag", catid);
args2.putString("action", SELECTED_ACTION);
args2.putString("sel_lang", SELECTED_LANGUAGE);
args2.putSerializable("langlist",langList);
f2.setArguments(args2);
return f2;
case 2:
Fragment f3 = new SmsFragment();
Bundle args3 = new Bundle();
args3.putString("fromlibfrag", catid);
args3.putString("action", SELECTED_ACTION);
args3.putString("sel_lang", SELECTED_LANGUAGE);
args3.putSerializable("langlist",langList);
f3.setArguments(args3);
return f3;
}
return null;
}
#Override
public int getCount() {
return FRAGMENT_COUNT;
}
#Override
public CharSequence getPageTitle(int position) {
switch (position){
case 0:
return "Videos";
case 1:
return "Photos";
case 2:
return "SMS";
}
return null;
}
}
}

int position=0;
tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener(){
#Override public void onTabSelected(TabLayout.Tab tab){
position = tab.getPosition();
} });
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
setdailog(position);
}
});
Now
public void setdailog(int currentTab)
{
final Dialog cpDialog = new Dialog(getActivity());
cpDialog.setTitle("Select Language");
cpDialog.setContentView(R.layout.alert_list);
ListView listView = (ListView) cpDialog.findViewById(R.id.listiview_lang);
AlertListAdapter mAdapter = new AlertListAdapter(langList, getActivity());
listView.setAdapter(mAdapter);
listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
SELECTED_LANGUAGE = langList.get(position).getLangid();
System.out.println("JO JO"+SELECTED_LANGUAGE);
Intent intent=new Intent(getActivity(),MusicActivity.class);
intent.putExtra("langlist",langList);
intent.putExtra("selid",catid);
intent.putExtra("langid",SELECTED_LANGUAGE);
intent.putExtra("langname",langList.get(position).getLangname());
intent.putExtra("selcat",sel_cat);
intent.putExtra("currentTab" , currentTab);
startActivity(intent);
finish();
cpDialog.dismiss();
}
});
cpDialog.show();
}
Now In MusicActivity.java
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Intent intent = getIntent();
int currentTab = intent.getIntExtra("currenttab", 0);
//here you can check if you get 1, 2 or 3 in currentTab then you have to set current tab to 1, 2 or 3 respectively.
}

I need to set unique ID/Text to fragment [duplicate]

I created an Tab based application using viewpager and Tablayout. When i click a button new tabs are created with a child fragment.
What I need is to assign different tab id to my tabs and each should be different. I tried i take the position of tabs but unfortunately, it doesn't work. when i tried to toast the position using below code it works only initially when the first tab is created and doesn't work for other tabs created. I don't know why this happens. ALso if i delete the tabs the position is not getting correct.
So I need an alternative solution to assign a TAB id (number or name) to each new tabs created so that when each tab is created I need to call a request to server with that id and populate data based on the tab ID
tabLayout.setOnTabSelectedListener(new TabLayout.ViewPagerOnTabSelectedListener(viewPager) {
#Override
public void onTabSelected(TabLayout.Tab tab) {
super.onTabSelected(tab);
viewPager.setCurrentItem(tab.getPosition());
selectedTabPosition = viewPager.getCurrentItem();
Toast.makeText(getActivity(), "Selected " + tab.getPosition(), Toast.LENGTH_SHORT).show();
Log.d("Selected", "Selected " + tab.getPosition());
}
#Override
public void onTabUnselected(TabLayout.Tab tab) {
super.onTabUnselected(tab);
Log.d("Unselected", "Unselected " + tab.getPosition());
}
});
My ViewPageradapter is:
public class ViewPagerAdapter extends FragmentStatePagerAdapter {
private final ArrayList<Fragment> mFragmentList = new ArrayList<>();
private final ArrayList<String> mFragmentTitleList = new ArrayList<>();
Context context;
ViewPager viewPager;
TabLayout tabLayout;
int selectedTabPosition;
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;
}
#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();
if (getCount() > 0) tabLayout.setupWithViewPager(viewPager);
//viewPager.setCurrentItem(getCount() - 1);
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();
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);
}
}
#Override
public int getItemPosition(Object object) {
return POSITION_NONE;
}
#Override
public CharSequence getPageTitle(int position) {
return mFragmentTitleList.get(position);
}
}
Parent Fragment:
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_parent, container, false);
getIDs(view);
setEvents();
return view;
}
private void getIDs(View view) {
viewPager = (ViewPager) view.findViewById(R.id.my_viewpager);
tabLayout = (TabLayout) view.findViewById(R.id.my_tab_layout);
add= (ImageView) view.findViewById(R.id.imageButtonAdd1);
adapter = new ViewPagerAdapter(getFragmentManager(), getActivity(), viewPager, tabLayout);
viewPager.setAdapter(adapter);
}
int selectedTabPosition;
private void setEvents() {
tabLayout.setOnTabSelectedListener(new TabLayout.ViewPagerOnTabSelectedListener(viewPager) {
#Override
public void onTabSelected(TabLayout.Tab tab) {
super.onTabSelected(tab);
viewPager.setCurrentItem(tab.getPosition());
selectedTabPosition = viewPager.getCurrentItem();
Toast.makeText(getActivity(), "Selected " + tab.getPosition(), Toast.LENGTH_SHORT).show();
Log.d("Selected", "Selected " + tab.getPosition());
}
#Override
public void onTabUnselected(TabLayout.Tab tab) {
super.onTabUnselected(tab);
Log.d("Unselected", "Unselected " + tab.getPosition());
}
});
add.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(adapter.getCount() > 4){
Toast.makeText(getActivity(), "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);
viewPager.setCurrentItem(adapter.getCount() - 1);
setupTabLayout();
}
}
});
}
public void addPage(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);
viewPager.setCurrentItem(adapter.getCount() - 1);
setupTabLayout();
}
public void setupTabLayout() {
selectedTabPosition = viewPager.getCurrentItem();
for (int i = 0; i < tabLayout.getTabCount(); i++) {
tabLayout.getTabAt(i).setCustomView(adapter.getTabView(i));
}
}
CHILD FRAGMENT :
public class FragmentChild extends Fragment {
String childname;
TextView textViewChildName;
EditText editText;
private GridView mGridView;
private ListItem mListItem;
private ListView mListview;
private ProgressBar mProgressBar;
private ProductViewAdapter mGridAdapter;
private ListViewAdapter mListAdapter = null;
private ArrayList<GridItem> mGridData;
private ArrayList<ListItem> mListData = null;
ListView listView;
CheckInterNetConnection check ;
Boolean isInternetPresent = false;
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_child, container, false);
Bundle bundle = getArguments();
childname = bundle.getString("data");
getIDs(view);
setEvents();
return view;
}
private void getIDs(View view) {
//textViewChildName = (TextView) view.findViewById(R.id.textViewChild);
//textViewChildName.setText(childname);
//editText = (EditText) view.findViewById(R.id.editText);
//editText.setText("");
}
private void setEvents() {
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
Log.e("onActivityCreated","onActivityCreated");
mGridView = (GridView) getView().findViewById(R.id.gridView);
mGridData = new ArrayList<>();
mGridAdapter = new ProductViewAdapter(getActivity(), R.layout.grid_product_layout, mGridData);
mGridView.setAdapter(mGridAdapter);
mListview = (ListView) getView().findViewById(R.id.list);
mListData = new ArrayList<>();
mListAdapter = new ListViewAdapter(getActivity(), R.layout.list_row, mListData);
mListview.setAdapter(mListAdapter);
}
#Override
public void onStart() {
super.onStart();
Log.e("onSTart","onSTart");
check = new CheckInterNetConnection(getActivity());
isInternetPresent = check.isConnectingToInternet();
if (isInternetPresent) {
//fetchProducts();
}
}
public void fetchProducts(){
Log.e("URL","http://13.126.17.194/products.php");
RestClientHelper.getInstance().get("http://13.126.17.194/products.php?tabid="{TAB ID HERE}, new RestClientHelper.RestClientListener() {
#Override
public void onSuccess(String response) {
parseResult(response);
mListData.clear();
mListAdapter.setGridData(mListData);
mGridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
try {
ListItem items;
GridItem item = (GridItem) parent.getItemAtPosition(position);
items = new ListItem();
items.setName(item.getTitle());
items.setType(item.getDescription());
mListData.add(items);
}
catch(Exception e){
}
finally {
mListAdapter.setGridData(mListData);
}
}
});
}
#Override
public void onError(String error) {
}
});
}
private void parseResult(String result) {
try {
JSONObject response = new JSONObject(result);
JSONArray posts = response.optJSONArray("products");
GridItem item;
if(posts.length() <= 0){
RelativeLayout ly = (RelativeLayout) getView().findViewById(R.id.noOps);
ly.setVisibility(View.VISIBLE);
}
else {
// RelativeLayout ly = (RelativeLayout) getView().findViewById(R.id.noOps);
//ly.setVisibility(View.INVISIBLE);
for (int i = 0; i < posts.length(); i++) {
JSONObject post = posts.optJSONObject(i);
String id = post.optString("id");
String title = post.optString("name");
String description = post.optString("description");
String image = post.optString("image");
String qty = post.optString("qty");
String quantityin = post.optString("quantityin");
String price = post.optString("price");
item = new GridItem();
item.setId(id);
item.setTitle(title);
item.setDescription(description);
item.setImage(image);
item.setQuantity(qty);
item.setQuantityIn(quantityin);
item.setUnitprice(price);
mGridData.add(item);
}
}
} catch (JSONException e) {
e.printStackTrace();
}
finally {
mGridAdapter.setGridData(mGridData);
}
}
}
PARENT FRAGMENT:
public class FragmentParent extends Fragment {
private TabLayout tabLayout;
private ViewPager viewPager;
private ViewPagerAdapter adapter;
private ImageView add;
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_parent, container, false);
getIDs(view);
setEvents();
return view;
}
private void getIDs(View view) {
viewPager = (ViewPager) view.findViewById(R.id.my_viewpager);
tabLayout = (TabLayout) view.findViewById(R.id.my_tab_layout);
add= (ImageView) view.findViewById(R.id.imageButtonAdd1);
adapter = new ViewPagerAdapter(getFragmentManager(), getActivity(), viewPager, tabLayout);
viewPager.setAdapter(adapter);
}
int selectedTabPosition;
private void setEvents() {
tabLayout.setOnTabSelectedListener(new TabLayout.ViewPagerOnTabSelectedListener(viewPager) {
#Override
public void onTabSelected(TabLayout.Tab tab) {
super.onTabSelected(tab);
viewPager.setCurrentItem(tab.getPosition());
selectedTabPosition = viewPager.getCurrentItem();
Toast.makeText(getActivity(), "Selected " + tab.getPosition(), Toast.LENGTH_SHORT).show();
Log.d("Selected", "Selected " + tab.getPosition());
}
#Override
public void onTabUnselected(TabLayout.Tab tab) {
super.onTabUnselected(tab);
Log.d("Unselected", "Unselected " + tab.getPosition());
}
});
add.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(adapter.getCount() > 4){
Toast.makeText(getActivity(), "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);
viewPager.setCurrentItem(adapter.getCount() - 1);
setupTabLayout();
}
}
});
}
public void addPage(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);
viewPager.setCurrentItem(adapter.getCount() - 1);
//setupTabLayout();
}
public void setupTabLayout() {
selectedTabPosition = viewPager.getCurrentItem();
for (int i = 0; i < tabLayout.getTabCount(); i++) {
tabLayout.getTabAt(i).setCustomView(adapter.getTabView(i));
}
}
}
PLEASE HELP ME TO SOLVE THIS

Here is my solution for the question:
First, create an id file under res/values named ids.xml:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<item name="tab_id_one" type="id"/>
<item name="tab_id_two" type="id"/>
</resources>
Then, within the code where tabs are created, do the following:
for (int i = 0; i< tabLayout.getTabCount(); i++) {
TabLayout.Tab mTab = tabLayout.getTabAt(i);
if (mTab != null) {
switch (i){
case 0:
View tabViewOne = ((ViewGroup) tabLayout.getChildAt(0)).getChildAt(i);
tabViewOne.setId(R.id.tab_id_one);
//ect..
break;
case 1:
View tabViewTwo = ((ViewGroup) tabLayout.getChildAt(0)).getChildAt(i);
tabViewTwo.setId(R.id.tab_id_two);
//ect..
break;
case 2:
//etc..
}
}
}
Note: Views tabViewOne and tabViewTwo can be made global variables where it will give access to their ids anywhere within the class/activity/fragment.

In your viewPager Adapter extends FragmentPagerAdapter this and include these methods and it will give new ID to every Fragment and when you add manually data in array and call notifyDataSetChange(), also call this method notifyChangeInPosition(mItems.size() - 1);.
From this the added item get a new ID.
private long baseId = 0;
ViewPagerAdapter(FragmentManager fragmentManager) {
super(fragmentManager);
}
// Returns total number of pages
#Override
public int getCount() {
return mItems.size();
}
//this is called when notifyDataSetChanged() is called
#Override
public int getItemPosition(Object object) {
// refresh all fragments when data set changed
return PagerAdapter.POSITION_NONE;
}
#Override
public long getItemId(int position) {
// give an ID different from position when position has been changed
return baseId + position;
}
/**
* Notify that the position of a fragment has been changed.
* Create a new ID for each position to force recreation of the fragment
*
* #param n number of items which have been changed
*/
void notifyChangeInPosition(int n) {
// shift the ID returned by getItemId outside the range of all previous fragments
baseId += getCount() + n;
}

You can use the setTag() method of TabLayout.Tab to use any Object you want as an identifier. You could do this in your setupTabLayout() method, where you are setting your custom view for each Tab.
For example, to use a String:
tabLayout.getTabAt(i).setTag("tab_" + i);
You can then later check the tag of each tab in your parent fragment with tab.getTag();

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

False data in customList in a dynamically created fragment

I have an Activity with 2 fragments.
Declared a ParentTabFragment in my Activity in which there is a TabLayout and a ViewPager.
There's a method in my ParentTabFragment called addPage which gets called in the Activity.
The addPage has another method called addFrag which is called from a ViewPagerAdapter creating the views in the ChildTabFragment dynamically.
There is a for loop which runs in the Activity, so the Fragments are created according to the number of items in the customList, creating the amount of tabs and pages in the Fragments.
In my ChildTabFragment I load a customList on tab selection event,
when I select a Tab in the ParentTabFragment, I call a getTabID() method from the ChildTabFragment and send the id of the Tab due to which I load the customList according to the id in the ParentTabFragment.
Problem is when I swipe or select tabs, duplicate/false data gets created in the customList.
I get the proper Id of the selected tab but when I try to pass it in the method, random id is called.
In my Activity Class:
for (int j =0;j<it.size();j++){
parentTabFragment.addPage(it.get(j).getTabMenuItem(), it.get(j).getTabMenuId() , selectedMenu);
}
ParentTabFragment:
public void addPage(String pagename, String pageId, String selectedMenu) {
Bundle bundle = new Bundle();
bundle.putString("data", pagename);
//bundle.putString("pageID", pageId);
childTabFragment = new ChildTabFragment();
childTabFragment.setArguments(bundle);
adapter.addFrag(childTabFragment, pagename, pageId);
adapter.notifyDataSetChanged();
if (selectedMenu == null) {
viewPager.setCurrentItem(0);
} else {
for (int i = 0; i < tabLayout.getTabCount(); i++) {
if (tabLayout.getTabAt(i).getText().equals(selectedMenu)) {
viewPager.setCurrentItem(i);
}
}
}
if (adapter.getCount() > 0) tabLayout.setupWithViewPager(viewPager);
setupTabLayout();
}
public void setupTabLayout() {
selectedTabPosition = viewPager.getCurrentItem();
for (int i = 0; i < tabLayout.getTabCount(); i++) {
tabLayout.getTabAt(i).setCustomView(adapter.getTabView(i));
}
}
ChildTabFragment:
public class ChildTabFragment extends Fragment {
String childname;
int menuItemId;
TextView textViewChildName, txtViewItemId;
ListView childTabMenuList;
private ArrayList<ChildTabMenu_POJO> childTabMenuPojoList = new ArrayList<>();
private ListView listView;
private ChildTabMenuAdapter childTabMenuAdapter;
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.child_tab_fragment, container, false);
Bundle bundle = getArguments();
childname = bundle.getString("data");
getIDs(view);
return view;
}
private void getIDs(View view) {
childTabMenuList = (ListView) view.findViewById(R.id.childTabMenuList);
loadChildMenu();
}
private void loadChildMenu(menuItemId) {
ChildTabMenu_POJO menu_pojo4 = new ChildTabMenu_POJO(String.valueOf(menuItemId), "4");
childTabMenuPojoList.add(menu_pojo4);
childTabMenuAdapter = new ChildTabMenuAdapter(childTabMenuPojoList, getActivity());
childTabMenuList.setAdapter(childTabMenuAdapter);
}
public void getTabID(int tabId) {
menuItemId = tabId;
Log.e("updatefrag", String.valueOf(menuItemId));
}
}
ViewPagerAdapter:
public class ViewPagerAdapter extends FragmentStatePagerAdapter {
private final ArrayList<Fragment> mFragmentList = new ArrayList<>();
private final ArrayList<Adapter_POJO> mFragmentTitleList = new ArrayList<>();
Context context;
ViewPager viewPager;
TabLayout tabLayout;
Adapter_POJO adapter_pojo;
public ViewPagerAdapter(FragmentManager manager, Context context, ViewPager viewPager,
TabLayout tabLayout) {
super(manager);
this.context = context;
this.viewPager = viewPager;
this.tabLayout = tabLayout;
}
#Override
public Fragment getItem(int position) {
return mFragmentList.get(position);
}
#Override
public int getCount() {
return mFragmentList.size();
}
public int getItemCount() {
return mFragmentTitleList.size();
}
public void addFrag(Fragment fragment, String title, String pageId) {
mFragmentList.add(fragment);
adapter_pojo = new Adapter_POJO(title,pageId);
mFragmentTitleList.add(adapter_pojo);
}
public View getTabView(final int position) {
View view = LayoutInflater.from(context).inflate(R.layout.view_pager_adapter_layout, null);
TextView tabItemName = (TextView) view.findViewById(R.id.textViewTabItemName);
tabItemName.setText(mFragmentTitleList.get(position).adapterMenuItem);
tabItemName.setTextColor(context.getResources().getColor(android.R.color.background_light));
return view;
}
#Override
public int getItemPosition(Object object) {
return POSITION_NONE;
}
#Override
public CharSequence getPageTitle(int position) {
return mFragmentTitleList.get(position).adapterMenuItem;
}
public String getPageId(int position){
return mFragmentTitleList.get(position).adapterMenuId;
}
}

If i understand your question so you need to create newInstance constructor for creating fragment with arguments
public static ChildTabFragment newInstance(int page, String title) {
FirstFragment fragmentFirst = new FirstFragment();
Bundle args = new Bundle();
args.putInt("someInt", page);
args.putString("someTitle", title);
fragmentFirst.setArguments(args);
return fragmentFirst;
}
And Store instance variables based on arguments passed in your ChildTabFragment .
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
page = getArguments().getInt("someInt", 0);
title = getArguments().getString("someTitle");
}
And now update the view in your onCreateView method
TextView tvLabel = (TextView) view.findViewById(R.id.tvLabel);
tvLabel.setText(page + " -- " + title);
And the main thing you should returns the ChildTabFragment to display for that page from your ViewPagerAdapter like this.
#Override
public Fragment getItem(int position) {
return ChildTabFragment.newInstance(position,"page "+String.valueOf(position));
}

android to how start a new fragment on Menu click

In android, how to have menu onClick start new fragment? i'm creating Fragment inside tabLayout? How to set menu click start new fragment? See my code, how can I display a new fragment when clicked from menu items?
public class NetworkFragment extends Fragment {
private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";
private String mParam1;
private String mParam2;
private TabLayout tabLayout;
private ViewPager viewPager;
public NetworkFragment() {
// Required empty public constructor
}
public static NetworkFragment newInstance(String param1, String param2) {
NetworkFragment fragment = new NetworkFragment();
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);
}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view =inflater.inflate(R.layout.fragment_network, container, false);
ViewPager viewPager = (ViewPager)view. findViewById(R.id.viewpager);
final PagerAdapter pagerAdapter =
new PagerAdapter(getChildFragmentManager(), getContext());
viewPager.setAdapter(pagerAdapter);
// Give the TabLayout the ViewPager
final TabLayout tabLayout = (TabLayout)view. findViewById(R.id.tabs);
tabLayout.setupWithViewPager(viewPager);
// Iterate over all tabs and set the custom view
for (int i = 0; i < tabLayout.getTabCount(); i++) {
TabLayout.Tab tab = tabLayout.getTabAt(i);
tab.setCustomView(pagerAdapter.getTabView(i));
}
final ImageView menuView = (ImageView) view.findViewById(R.id.menuView);
menuView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(final View v) {
PopupMenu popup = new PopupMenu(getContext(), v);
popup.getMenuInflater().inflate(R.menu.network_menu, popup.getMenu());
popup.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
#Override
public boolean onMenuItemClick(MenuItem item) {
//Toast.makeText(getContext(), "You Clicked : " + item.getTitle(), Toast.LENGTH_SHORT).show();
if(item.getItemId() ==R.id.allLinks){
//new Fragment
}
else if(item.getItemId() ==R.id.networkFavourites){
Toast.makeText(getContext(), "networkFavourites" , Toast.LENGTH_SHORT).show();
}
else if(item.getItemId() ==R.id.CompanyLinks){
Toast.makeText(getContext(), "CompanyLinks" , Toast.LENGTH_SHORT).show();
}
else if(item.getItemId() ==R.id.Company){
Toast.makeText(getContext(), "CompanyLinks" , Toast.LENGTH_SHORT).show();
}
else if(item.getItemId() ==R.id.Industry){
Toast.makeText(getContext(), "CompanyLinks" , Toast.LENGTH_SHORT).show();
}
return true;
}
});
popup.show();
}
});
return view;
}
class PagerAdapter extends FragmentPagerAdapter {
String tabTitles[] = getResources().getStringArray(R.array.network_tab);
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 MylinksFragment();
case 1:
return new MyGroupsFragment();
case 2:
return new MyInvitationsFragment();
case 3:
return new MyMessagesFragment();
}
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;
}
}
}

Actually your question is not clear. But as per my understanding you want to display a new fragment on menu click. To do so you have to write a code like
for API level 2.2 and above and when you are using a v4 support jar
Fragment fragment = new YourFragmentName();// the fragment which you ant to display
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction().replace(R.id.frame_container,fragment).commit();
for API level 3.0 and above and when you are not using a v4 support jar
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction().replace(R.id.frame_container, fragment).commit();
By this way you can replace a fragment or display a new fragment.