Develop Reference

How to get the selected page index of ViewPager in fragment

I'm making use of ViewPagerIndicator, and I have my adapter defined like this:
public class MyPagerAdapter extends FragmentPagerAdapter implements
IconPagerAdapter {
private final static String TAB_ITEMS[] = { "Tab 1", "Tab 2", "Tab 3", "Tab 4"};
private int count = TAB_ITEMS.length;
public MyPagerAdapter (FragmentManager fm) {
super(fm);
}
#Override
public int getIconResId(int index) {
// TODO Auto-generated method stub
return 0;
}
#Override
public Fragment getItem(int position) {
Fragment fragment = new BaseFragment();
return fragment;
}
#Override
public int getCount() {
return count;
}
And this is my activity that will contain my fragments:
public class MyActivity extends FragmentActivity implements
OnPageChangeListener {
private int tabPosition;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ViewPager pager = (ViewPager) findViewById(R.id.pager);
MyPagerAdapter adapter = new MyPagerAdapter (
getSupportFragmentManager());
pager.setAdapter(adapter);
UnderlinePageIndicator indicator = (UnderlinePageIndicator) findViewById(R.id.indicator);
indicator.setFades(false);
indicator.setViewPager(pager);
indicator.setOnPageChangeListener(this);
}
#Override
public void onPageScrollStateChanged(int state) {
// TODO Auto-generated method stub
}
#Override
public void onPageScrolled(int position, float positionOffset,
int positionOffsetPixels) {
// TODO Auto-generated method stub
}
#Override
public void onPageSelected(int position) {
// TODO Auto-generated method stub
setTabPosition(position);
Toast.makeText(MyActivity.this,
"Changed to page: " + position, Toast.LENGTH_SHORT).show();
}
public void setTabPosition(int position) {
this.tabPosition = position;
}
public int getTabPosition() {
return this.tabPosition;
}
}
Finally the definition of BaseFragment:
public class BaseFragment extends Fragment implements OnItemClickListener {
private final static String TAG = "BaseFragment";
private int tabPosition;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_base, container,
false);
return view;
}
#Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onActivityCreated(savedInstanceState);
tabPosition = ((MyActivity) getActivity()).getTabPosition();
Toast.makeText(getActivity(), "page " + tabPosition, Toast.LENGTH_SHORT)
.show();
}
Now , this is my problem:
The toast in onPageSelected of the activity always shows the correct page when a new page is selected or swiped to.
However, the toast in my fragment only shows the correct page when you swipe to either page 1 or page 2. The only time it toasts page 0 is anytime the app is launched. After that, when the user swipes to page 0 or page 4, no toast is shown at all, not even an empty toast.
I wrote the getTabPosition() and setTabPosition() methods with the intention of getting the current selected tab position in the fragment, but it obviously doesn't work correctly hence I dont get toasts on pages 0 and 4.
My question is: how do I get the selected page position in my BaseFragment, since I need that position to load the appropriate data?
Hope I was clear enough?

Each Fragment will display a different set of data, then maybe it is a good idea to have one fragment for each. Here is what I did to display different Fragments for different data in the FragmentPagerAdapter:
#Override
public Fragment getItem(int index) {
Fragment fragment = null;
// Define the page for each index
switch(index){
case 0:
fragment = new Fragment1();
break;
case 1:
fragment = new Fragment2();
break;
case 2:
fragment = new Fragment3();
break;
}
This may not be the best approach but in your activity that holds reference to ViewPager try this:
public class TabbedViewActivity extends FragmentActivity {
ViewPager viewPager;
public static int tabIndex = 0;
#Override
protected void onCreate(Bundle bundle) {
......
viewPager = (ViewPager)findViewById(R.id.pager);
TabbedViewActivity.tabIndex = 0; // in the start index is always 0 unless coded otherwise
viewPager.setOnPageChangeListener(
new ViewPager.SimpleOnPageChangeListener() {
#Override
public void onPageSelected(int position) {
TabbedViewActivity.tabIndex = position;
}
});
}
Then you can always access this variable statically like this in your Fragment TabbedViewActivity.tabIndex

pager.getCurrentItem();
it return current fragment index

How to access method in fragment from different class?

I have navigational drawer and fragment for each drawer item. Now Under each fragment we have created multiple fragments using FragmentPagerAdapter.
I've 3 drawer items as Home, Group and Feedback. Under Home, there are 2 fragments i.e My Profile and Logged
so i've created a swipeable tabs for My Profile and Logged and these two fragments are under home item. Now i've to do some network calls in both the fragments(My Profile, Logged) but how to identify which fragment is active on FragmentPagerAdapter? Is it possible to stop adapter to create fragments in advance.
HomeFragment
DrawerModel model = new DrawerModel();
LoggedFragment loggedFrag = new LoggedFragment();
loggedFrag.setTargetFragment(loggedFrag, 0);
model.setFragment(loggedFrag);
dFragments.add(model);
model = new DrawerModel();
model.setDrawerTitle(getString(R.string.profile_tab_title));
model.setFragment(new ProfileFragment());
dFragments.add(model);
Bundle bundle = new Bundle();
bundle.putSerializable("fragments", dFragments);
fragment = new DrawerFragment();
fragment.setArguments(bundle);
navigateFragment(fragment);
DrawerFragment
public class DrawerFragment extends Fragment {
private FragmentAdapter pagerAdapter;
private ViewPager mViewPager;
private ArrayList<DrawerModel> fList;
#SuppressWarnings("unchecked")
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
fList = (ArrayList<DrawerModel>) getArguments().getSerializable(
"fragments");
View v = inflater.inflate(R.layout.swipe_tabs, container, false);
pagerAdapter = new FragmentAdapter(getChildFragmentManager(), fList);
mViewPager = (ViewPager) v.findViewById(R.id.pager);
mViewPager.setAdapter(pagerAdapter);
return v;
}
}
FragmentAdapter
public class FragmentAdapter extends FragmentStatePagerAdapter {
private int TOTAL_TABS = 0;
private ArrayList<DrawerModel> fragmentList;
private SparseArray<Fragment> mPageReference = new SparseArray<Fragment>();
public FragmentAdapter(FragmentManager fm, ArrayList<DrawerModel> fList) {
super(fm);
// TODO Auto-generated constructor stub
TOTAL_TABS = fList.size();
fragmentList = fList;
}
#Override
public Fragment getItem(int position) {
// TODO Auto-generated method stub
return fragmentList.get(position).getDrawerFragment();
}
#Override
public int getCount() {
// TODO Auto-generated method stub
return TOTAL_TABS;
}
#Override
public Object instantiateItem(ViewGroup container, int position) {
// TODO Auto-generated method stub
Fragment fragment = (Fragment) super.instantiateItem(container,
position);
mPageReference.put(position, fragment);
Log.d("FragmentAdapter - OnCreate", mPageReference.size() + "");
return fragment;
}
#Override
public CharSequence getPageTitle(int position) {
// TODO Auto-generated method stub
return fragmentList.get(position).getDrawerTitle();
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
// TODO Auto-generated method stub
mPageReference.remove(position);
Log.d("FragmentAdapter - onDestroy", mPageReference.size() + "");
super.destroyItem(container, position, object);
}
public Fragment getFragment(int key) {
return mPageReference.get(key);
}
}
Logged Fragment
public class LoggedFragment extends Fragment implements OnClickListener {
TextView tHeader, tEmail, tvPhone;
SharedPreferences sp;
ImageView ivAds;
String bannerUrl = null;
private Handler handler = new Handler();
private static final String TAG = "LoggedFragment";
private void addListeners() {
// TODO Auto-generated method stub
ivAds.setOnClickListener(this);
}
Runnable updateImage = new Runnable() {
#Override
public void run() {
// TODO Auto-generated method stub
if (Utility.checkConnectivity(getActivity()))
new ImageTask((Home_Activity) getActivity(), "Logged")
.execute();
handler.postDelayed(this, Utility.AD_DURATION);
}
};
#Override
public void onStart() {
// TODO Auto-generated method stub
super.onStart();
if (handler != null)
handler.post(updateImage);
}
#Override
public void onStop() {
// TODO Auto-generated method stub
super.onStop();
if (handler != null)
handler.removeCallbacks(updateImage);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
View v = inflater.inflate(R.layout.logged_in, container, false);
bindComponents(v);
addListeners();
return v;
}
private void bindComponents(View v) {
// TODO Auto-generated method stub
ivAds = (ImageView) v.findViewById(R.id.ivLoggedAds);
}
public void updateBanner(Bitmap bitmap, String url) {
ivAds.setImageBitmap(bitmap);
bannerUrl = url;
}
}
Call to update fragment method
Fragment fragment = activity.getSupportFragmentManager()
.findFragmentById(R.id.content_frame)
.getTargetFragment();
if (fragment instanceof LoggedFragment) {
LoggedFragment logged = (LoggedFragment) fragment;
logged.updateBanner(result, parameter[1]);
} else
Log.d(TAG, "No Logged Fragment Found");
Now under logged and my profile fragment i need to fetch some data dynamically as soon fragment is visible to user but unable to do so?
Any ideas/suggestions is highly appreciated.

use below code to find your fragment,
FragmentAdapter pa = (FragmentAdapter)viewPager.getAdapter();
pa.getFragment(viewPager.getCurrentItem()).updateBanner();
the code select current visible fragment you can change it to other one by
pa.getFragment(index of other fragment).updateBanner();
you must cast pa.getFragment(viewPager.getCurrentItem()) to what fragment you want for example if at that position it is logged change it to below:
((LoggedFragment)pa.getFragment(viewPager.getCurrentItem()) )

I would say you have two differnt options.
Option one: Use setTargetFragment() and getTargetFragment() so you get a reference to that fragment you need.
Option two: Use the FragmentManager simply get that Fragment you need from the FragmentManager and call that methods you defined on your Fragment.

How can I communicate/pass data through different Fragments with Swipe Tab?

Hi I have a Swipe Tab Fragment Activity that contains Three Fragments. I created my own adapter that extends FragmentStatePageAdapter.
Now here I'll explain how each tab (Fragments) works.
In Tab 1 and Tab 2, I have a list with practically the same type, when I mean type, I mean they are Symptoms (fever, pain in the eyes, etc.).
Now Tab 3 serves as a tray. Whenever I select an item from the listview in either Tab 1 or Tab 2, I want to transfer that item to Tab 3 and remove that Item from the List where it was selected.
I have tried implementing an Interface but it didn't work for me since I added the fragments on the Main FragmentActivity through an Adapter. MY questions is
How can I communicate the three Fragments? Meaning how can I pass data between these fragment.
Now if you want to take a look at what I've done for now, here it is:
I depicted this as Tab 2 in my question
public class FragmentGeneralSymptoms extends ListFragment implements OnItemClickListener {
ArrayList<String> symptomList;
String name;
String selected;
Tray tray;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
return inflater.inflate(R.layout.fragment_generalsymptoms, container,
false);
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onActivityCreated(savedInstanceState);
Bundle args = getArguments();
name = args.getString("key");
tray = (Tray) getActivity();
new LoadSymptoms().execute();
}
class LoadSymptoms extends AsyncTask<String, String, String> {
#Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
KnowledgeBaseHelper helper = new KnowledgeBaseHelper(getActivity());
ProfileHandler handler = new ProfileHandler(getActivity());
Profiles profile = handler.getProfile(name);
String age = profile.getAge() + "";
String gender = profile.getGender();
symptomList = helper.getSymptomList(name, age, gender);
return null;
}
#Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
setListAdapter(new ArrayAdapter<String>(getActivity(),
R.layout.general_list, symptomList));
}
}
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
// TODO Auto-generated method stub
selected = symptomList.get(arg2);
tray.respond(selected);
}
}
My Tab 3
public class FragmentTray extends ListFragment{
private ArrayList<String> selectedList;
public FragmentTray(){}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
return inflater.inflate(R.layout.fragment_tray, container, false);
}
public void addToTray(String symptom){
selectedList.add(symptom);
setListAdapter(new ArrayAdapter<String>(getActivity(),
R.layout.general_list, selectedList));
}
public void removeSymptom(String string){
selectedList.remove(selectedList.indexOf(string));
}
}
My MainActivity which Extends FragmentActivity
public class MainActivity extends FragmentActivity implements TabListener, OnPageChangeListener, Tray {
private String selectedProfileName;
ActionBar actionBar;
ViewPager viewPager;
#Override
protected void onCreate(Bundle arg0) {
// TODO Auto-generated method stub
super.onCreate(arg0);
setContentView(R.layout.main_activity);
Bundle args = getIntent().getExtras();
selectedProfileName = args.getString("key_name");
viewPager = (ViewPager) findViewById(R.id.main_pager);
viewPager.setAdapter(new MyAdapter(getSupportFragmentManager()));
viewPager.setOnPageChangeListener(this);
InitializeActionBar();
}
public void InitializeActionBar() {
actionBar = getActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
ActionBar.Tab tabBodyPart = actionBar.newTab();
tabBodyPart.setText("Body Parts");
tabBodyPart.setTabListener(MainActivity.this);
ActionBar.Tab tabGeneralSymptoms = actionBar.newTab();
tabGeneralSymptoms.setText("General Symptoms");
tabGeneralSymptoms.setTabListener(MainActivity.this);
ActionBar.Tab tabSelectedSymptoms = actionBar.newTab();
tabSelectedSymptoms.setText("Selected Symptoms");
tabSelectedSymptoms.setTabListener(MainActivity.this);
actionBar.addTab(tabBodyPart);
actionBar.addTab(tabGeneralSymptoms);
actionBar.addTab(tabSelectedSymptoms);
}
#Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
viewPager.setCurrentItem(tab.getPosition());
}
class MyAdapter extends FragmentStatePagerAdapter {
public MyAdapter(FragmentManager fm) {
super(fm);
// TODO Auto-generated constructor stub
}
#Override
public Fragment getItem(int arg0) {
// TODO Auto-generated method stub
Fragment fragment = null;
Bundle bundle = new Bundle();
bundle.putString("key", selectedProfileName);
if (arg0 == 0) {
fragment = new FragmentBodyPart();
fragment.setArguments(bundle);
}
if (arg0 == 1) {
fragment = new FragmentGeneralSymptoms();
fragment.setArguments(bundle);
}
if (arg0 == 2) {
fragment = new FragmentTray();
}
return fragment;
}
#Override
public int getCount() {
// TODO Auto-generated method stub
return 3;
}
}
#Override
public void onPageSelected(int arg0) {
// TODO Auto-generated method stub
actionBar.setSelectedNavigationItem(arg0);
}
#Override
public void respond(String string) {
// TODO Auto-generated method stub
FragmentTray frag2 = new FragmentTray();
frag2.addToTray(string);
}
}
Finally my Interface
public interface Tray {
public void respond(String string);
}

what I usually do is:
1.- Define the interface. It's done, fine.
2.- Your FragmentGeneralSymptoms must have an initializated listener. Yuou're that but you forgot to set the listener in the class.
public class FragmentGeneralSymptoms extends ListFragment implements OnItemClickListener {
ArrayList<String> symptomList;
String name;
String selected;
Tray tray;
(your code)
public void setTrayListener(Tray listener)
{
tray = listener;
}
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
// TODO Auto-generated method stub
selected = symptomList.get(arg2);
if(tray != null)
{
symptomList.remove(selected); // if you want to remove this element from this list
tray.respond(selected);
}
} }
3.- Your FragmentTray class must implement the interface:
public class FragmentTray extends ListFragment implements Tray{
private ArrayList<String> selectedList;
public FragmentTray(){}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
return inflater.inflate(R.layout.fragment_tray, container, false);
}
public void addToTray(String symptom){
selectedList.add(symptom);
setListAdapter(new ArrayAdapter<String>(getActivity(),
R.layout.general_list, selectedList));
}
public void removeSymptom(String string){
selectedList.remove(selectedList.indexOf(string));
}
public void respond(String name)
{
// do stuffs!!!!
selectedList.add(new Symtom(name)); // for example
System.out.println("Inside the respond method respond in FragmentTray class");
}
}
4.- And last but not least. When you build the fragments you must register the listener:
class MyAdapter extends FragmentStatePagerAdapter {
private List<Fragment> fragmentList;
public MyAdapter(FragmentManager fm) {
super(fm);
// TODO Auto-generated constructor stub
fragmentList = new ArrayList<Fragment>();
Fragment fragmentBodyPart = new FragmentBodyPart();
Fragment fragmentTray = new FragmentTray();
Fragment fragmentGeneralSymptoms = new FragmentGeneraSymptoms();
// this is important*********************************
fragmentGeneraSmptoms.setTrayListener(fragmentTray);
fragmentList.add(fragmentBodyPart);
fragmentList.add(fragmentGeneralSymptoms);
fragmentList.add(fragmentTray);
}
#Override
public Fragment getItem(int arg0) {
// TODO Auto-generated method stub
Fragment fragment = null;
Bundle bundle = new Bundle();
bundle.putString("key", selectedProfileName);
if (arg0 == 0) {
fragment = (Fragment) fragmentList.get(0);
fragment.setArguments(bundle);
}
if (arg0 == 1) {
fragment = (Fragment) fragmentList.get(1);
fragment.setArguments(bundle);
}
if (arg0 == 2) {
fragment = (Fragment) fragmentList.get(2);
}
return fragment;
}
#Override
public int getCount() {
// TODO Auto-generated method stub
return fragmentList.size();
}
}
I hope that it helps.

how refresh view when change page?

i have a fragment activity that have 4 page and load from 4 link from internet
when program start customlist show lists but when i change page the view show white page
my fragment :
public class VpiAbsTestActivitynouser extends SherlockFragmentActivity {
private static final String[] CONTENT = new String[] {" page1","page2","page3","page4"};
TestFragmentAdapter mAdapter;
ViewPager mPager;
PageIndicator mIndicator;
TextView mSearchView;
public String[] xmlURLArray = new String[]{"link1.xml","link2.xml","link3.xml","link4.xml"};
protected void onCreate(Bundle savedInstanceState) {
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
super.onCreate(savedInstanceState);
setContentView(R.layout.simple_tabs);
Intent i = new Intent(this, transparentone.class);
startActivity(i);
mAdapter = new TestFragmentAdapter(getSupportFragmentManager());
mPager = (ViewPager)findViewById(R.id.pager);
mPager.setAdapter(mAdapter);
mIndicator = (TabPageIndicator)findViewById(R.id.indicator);
mIndicator.setViewPager(mPager);
mIndicator.setCurrentItem(1);
}
class TestFragmentAdapter extends FragmentPagerAdapter {
private int mCount = CONTENT.length;
public TestFragmentAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
Bundle args = new Bundle();
args.putString("url", xmlURLArray[position]);
return customlist.newInstance(args);
}
#Override
public int getCount() {
return mCount;
}
public CharSequence getPageTitle(int position) {
return VpiAbsTestActivitynouser.CONTENT[position % VpiAbsTestActivitynouser.CONTENT.length].toUpperCase();
}
#Override
public void destroyItem(View collection, int position, Object view) {
((ViewPager) collection).removeView((View) view);
}
}
}
and my custom list code is :
public class customlist extends SherlockFragment {
int fragment_position_in_viewpager = 0;
// All static variables
public static customlist newInstance(Bundle args) {
customlist fragment = new customlist();
fragment.setArguments(args);
return fragment;
}
ListView list;
LazyAdapterbeth adapter1;
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
}
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
URL = getArguments().getString("url");
}
new getFeed().execute();
}
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
ViewGroup root = (ViewGroup) inflater.inflate(
R.layout.dovomi, container, false);
return root;
}
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
if (getArguments() != null) {
fragment_position_in_viewpager = getArguments().getInt("position");
//Update the Fragment on ViewPager Position.
}
}
private class getFeed extends AsyncTask<Void, Void, Document> {
#Override
protected void onPreExecute() {
}
protected Document doInBackground(Void... params) {
}
protected void onPostExecute(Document doc) {
}
list=(ListView)getView().findViewById(R.id.list);
adapter1=new LazyAdapterbeth(getActivity(), songsList);
adapter1.notifyDataSetChanged();
list.setAdapter(adapter1);
how i can refresh view when change the view from page 1 to page 2 ?

As your code is very long, I didn't analyse it deeply but the following solutions come to my mind:
1) onCreateView for each fragment method is regularly called when fragment is recreated/its view hierarchy is recreated
Thus it can be one place for refreshing. However onCreateView is called slightly earlier than before paging displaying (usually where you display page nr 2, onCreateView for page number 3 is executed). The best idea is to put a short code displaying Toast in onCreateView and then you will know if it's ok for you.
2) Your main activity (extending FragmentActivity) can get 3 methods which are executed when swiping between fragments. It will look more or less in the following way:
public MyActivity extends FragmentActivity implements OnPageChangeListener {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mainActivityPageAdapter = new MainActivityPageAdapter (this, getSupportFragmentManager());
mainActivityViewPager = (ViewPager) findViewById(R.id.main_activity_view_pager);
mainActivityViewPager.setAdapter(mainActivityPageAdapter);
//set listener (for navigator)
mainActivityViewPager.setOnPageChangeListener(this);
}
//and now you have 3 methods
#Override
public void onPageScrollStateChanged(int state) {
}
#Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
#Override
public void onPageSelected(int position) {
}
You can read more http://developer.android.com/reference/android/support/v4/view/ViewPager.OnPageChangeListener.html

need help to fix code for getting current view in viewpager

Need help to fix a code I saw in a https://stackoverflow.com/a/9275732/1938357. The solution I need is get the current view onany page in my viewpager based application
Below is the code for reference
public View getCurrentView(ViewPager pager) {
for (int i = 0; i < pager.getChildCount(); i++) {
View child = pager.getChildAt(i);
if (child.getX() <= pager.getScrollX() + pager.getWidth()
&& child.getX() + child.getWidth() >= pager.getScrollX() + pager.getWidth()) {
return child;
}
}
return getChildAt(0);
I am trying to access the current view in the view pager and used the code above. It works fine when I scroll forwards. But when I scroll backwards then after 2 backward scrolls this stops working.
Public class myActivity extends FragmentActivity
//Variable declarations
protected void onCreate(Bundle savedInstanceState) {
ViewPager mPager = (ViewPager) findViewById(R.id.pager);
mPagerAdapter = new ScreenSlidePagerAdapter(getSupportFragmentManager());
mPager.setAdapter(mPagerAdapter);
View CurrView;
OnPageChangeListener pageChangelistener = new OnPageChangeListener() {
#Override
public void onPageSelected(int pageSelected) {
doTextViewChnges();//access the text view and update it based on pageSelected
---THIS IS WHERE I AM STUCK IN TRYING TO GET THE TEXTVIEW IN MY CURRENT FRAGMWNT/VIEW-------
}
mPager.setOnPageChangeListener(pageChangelistener);
}
private class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter {
public ScreenSlidePagerAdapter(android.support.v4.app.FragmentManager fm) {
super(fm);
}
#Override
public android.support.v4.app.Fragment getItem(int position) {
return ScreenSlidePageFragment.create(position, <other parameters I want to pass>);
}
#Override
public int getCount() {
return NUM_PAGES;
}
}
And below is my ScreenSlidePageFragment class
public class ScreenSlidePageFragment extends android.support.v4.app.Fragment {
public static final String ARG_PAGE = "pagenumber";
public static final String ARG_PAGEARRAY = "pages";
private int mPageNumber;
//Declare other variables
#SuppressLint("NewApi")
public static ScreenSlidePageFragment create(int pageNumber, String[] pages, int bookmarkPageNumber, String storyName, int linesInOnePage) {
ScreenSlidePageFragment fragment = new ScreenSlidePageFragment();
Bundle args = new Bundle();
args.putInt(ARG_PAGE, pageNumber);
args.putStringArray(ARG_PAGEARRAY, pages);
fragment.setArguments(args);
return fragment;
}
#SuppressLint("NewApi")
public ScreenSlidePageFragment() {
}
#SuppressLint("NewApi")
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mPageNumber = getArguments().getInt(ARG_PAGE);
pages = getArguments().getStringArray(ARG_PAGEARRAY);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
rootView = (ViewGroup) inflater
.inflate(R.layout.activity_story, container, false);
//load layout with all components filled up for that page
loadView(rootView);
return rootView;
}
public int getPageNumber() {
return mPageNumber;
}

It is very hard to discuss in comments with example of code.
As I see in grepcode FragmentStatePagerAdapter.setPrimaryItem(), receive object as android.support.v4.app.Fragment. But you are receive ClassCastException when trying to cast object as Fragment. Can you check your casting: do you really cast object in android.support.v4.app.Fragment not in android.app.Fragment? If all right, add your exception message to your question, please.
UPDATE:
If your ScreenSlidePagerAdapter has method getCurrentView(), then your method 'getCurrentView()' can work like this:
public View getCurrentView(ViewPager pager) {
return ((ScreenSlidePagerAdapter) pager.getAdapter()).getCurrentView();
}
And method getCurrentView() of your ScreenSlidePagerAdapter:
public View getCurrentView() {
return currView;
}
UPDATE 2:
I've made some modification with your code:
Your Activity with private Adapter:
public class myActivity extends FragmentActivity implements ISelectItemListener {
// Your variable declarations and methods
#Override
protected void onCreate(Bundle savedInstanceState) {
final ViewPager pager = (ViewPager) findViewById(R.id.pager);
mPagerAdapter = new ScreenSlidePagerAdapter(getSupportFragmentManager());
pager.setAdapter(mPagerAdapter);
pager.setOnPageChangeListener(
new OnPageChangeListener() {
#Override
public void onPageSelected(int pageSelected) {
final ScreenSlidePageFragment fragment = mPagerAdapter.getFragment(pageSelected);
if (fragment != null) {
fragment.doTextViewChnges();
}
}
#Override
public void onPageScrollStateChanged(int arg0) {
// TODO Auto-generated method stub
}
#Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
// TODO Auto-generated method stub
}
});
}
private class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter {
//Your variable declarations
private final ScreenSlidePageFragment[] mFragments;
public ScreenSlidePagerAdapter(android.support.v4.app.FragmentManager fm) {
super(fm);
mFragments = new ScreenSlidePageFragment[NUM_PAGES];
}
#Override
public int getCount() {
return NUM_PAGES;
}
// It will create new ScreenSlidePageFragment by position if it's not exsist
#Override
public android.support.v4.app.Fragment getItem(int position) {
if (getFragment(position) == null) {
mFragments[position] = ScreenSlidePageFragment.create(position, <other parameters I want to pass>);
}
return getFragment(position);
}
// It will give you ScreenSlidePageFragment if it's exists, or null
public ScreenSlidePageFragment getFragment(int position) {
return mFragments[position];
}
}
}
Your Fragment:
public class ScreenSlidePageFragment extends Fragment {
//Your variables and methods
public static ScreenSlidePageFragment create(int pageNumber, String[] pages, int bookmarkPageNumber, String storyName, int linesInOnePage) {
final Bundle args = new Bundle();
args.putInt(ARG_PAGE, pageNumber);
args.putStringArray(ARG_PAGEARRAY, pages);
final ScreenSlidePageFragment fragment = new ScreenSlidePageFragment();
fragment.setArguments(args);
return fragment;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mPageNumber = getArguments().getInt(ARG_PAGE);
pages = getArguments().getStringArray(ARG_PAGEARRAY);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
rootView = (ViewGroup) inflater.inflate(R.layout.activity_story, container, false);
loadView(rootView);
return rootView;
}
public int getPageNumber() {
return mPageNumber;
}
// Let's keep logic of modifications in fragment
public void doTextViewChnges() {
final View view = getView();
// do what you want with your View and his children
}
}