I'm trying to update a textview in my fragment based on what a user clicks. When I first load the activity it sets the textview. But later, even though the textview.settext does get called, nothing seems to change.
In my activity I send the new variable like this:
getSupportFragmentManager().beginTransaction().add(R.id.pager1, SecondFragment.newInstance(2, "Page # 2", nonStaticRandomInfoSt), "tag").commit();
My Fragment:
public static SecondFragment newInstance(int page, String title, String randomInfo) {
SecondFragment fragmentSecond = new SecondFragment();
Bundle args = new Bundle();
args.putInt("someInt", page);
args.putString("someTitle", title);
args.putString("randomInfo", randomInfo);
fragmentSecond.setArguments(args);
return fragmentSecond;
}
// Store instance variables based on arguments passed
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
randomInfo = this.getArguments().getString("randomInfo");
}
// Inflate the view for the fragment based on layout XML
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_second, container, false);
TextView randomInfoTV = (TextView) view.findViewById(R.id.randomInfo);
randomInfoTV.setText(randomInfo); //this is getting called, but it's not changing the textview
randomInfoTV.setMovementMethod(new ScrollingMovementMethod());
return view;
}
Edit:
I have a fragment in a viewpager. When the activity is first entered, a default value is set to the textview in the fragment. From a listview in my activity layout, the user can make a selection. When an item is selected, I call the fragment manager and pass the new randomInfo variable. I want to update the textview in the fragment. I know the correct value is being passed by debugging, and I know that the textview.settext is being called as well. But for some reason, the textview remains unchanged. Do you have any suggestions as to why this is happening? I don't even know where to start in fixing it.
How I create the fragments:
public static class MyPagerAdapter1 extends FragmentPagerAdapter {
private static int NUM_ITEMS = 2;
public MyPagerAdapter1(FragmentManager fragmentManager) {
super(fragmentManager);
}
// Returns total number of pages
#Override
public int getCount() {
return NUM_ITEMS;
}
// Returns the fragment to display for that page
#Override
public Fragment getItem(int position) {
switch (position) {
case 0: // Fragment # 0 - This will show FirstFragment
return FirstFragment.newInstance(0, "Page # 1", imageURL);
case 1: // Fragment # 0 - This will show FirstFragment different title
return SecondFragment.newInstance(2, "Page # 2", randomInfoSt);
default:
return null;
}
}
Click event code;
listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position,
long id) {
// TODO Auto-generated method stub
if (!fromservice) {
Log.i(TAG, "about to start service");
//starting service code...
initFragmentVars(position); //this runs the fragmentmanager transaction
}
Set the text in public void onViewCreated(final View view, final Bundle savedInstanceState); instead of onCreateView().
The later is ok for what you're doing (findViewById()) but the binding of the data + the view, should be done after the views have been created, especially inside a Fragment.
I know this is confusing, but Android Lifecycle is a mess created by dozens of different software engineers and here we are…
Related
I want to make a quiz application. So far I have 3 activities - home, quiz, score. Since the quiz activity contains multiple equivalent views ( image header, question and 4 answer buttons ), I did some reading and decided that
ViewPager with FragmentStatePagerAdapter show do the trick. So I made an xml template and inflated couple of test views and it was all looking good, until I started handling the user interaction.
I want to simulate a toggle button and there is only one correct answer to each question, so selecting one button should deselect the previous one ( if any ). When the button is pressed I change my Question model, then I find all 4 buttons with findViewById and reset their color filter. Then I set that filter back on my selected button. To determine which question model to update I use the current fragment position, which I have set ( using setTag, in fragment's onCreate ) in my template root view.
This is how I call my fragmets:
public Fragment getItem(int position) {
Question question = Repository.findById(position);
int correctAnswerBtnId;
switch (question.getCorrectAnswerIndex()) {
case 0: correctAnswerBtnId = R.id.quiz_answer_0_btn; break;
case 1: correctAnswerBtnId = R.id.quiz_answer_1_btn; break;
case 2: correctAnswerBtnId = R.id.quiz_answer_2_btn; break;
case 3: correctAnswerBtnId = R.id.quiz_answer_3_btn; break;
this.ACTIVITY_ROOT.setTag(question.getID());
Fragment fragment = new QuestionFragment();
Bundle args = new Bundle();
args.putSerializable(QuestionFragment.QUESTION, question);
fragment.setArguments(args);
return fragment;
}
My QuestionFragment onCreateView is as per documentation:
public View onCreateView(
LayoutInflater inflater,
ViewGroup container,
Bundle questionData) {
this.rootView = inflater.inflate(
R.layout.layout_question_template,
container,
false);
Bundle args = getArguments();
this.question = (Question) args.getSerializable(QuestionFragment.QUESTION);
populateInflatable();
rootView.findViewById(R.id.layout_question_template_root).setTag(this.question.getID());
return rootView;
}
In populateInflatable I use this.rootView to fintViewById and populate it with my question data. Then I change the color of a button, if there is selected one from the Question.
On button click I call selectAnserButton :
public void selectAnswerButton(View selectedButton) {
int questionId =
(int) this.activityRoot.findViewById(
R.id.layout_question_template_root).getTag(); //??
unSelectAllButtons();
changeColor(selectedButton);
Repository.findById(questionId).selectAnswer(selectedButton.getId());
}
Where unSelectAllButtons represents buttonToUnSelect.getBackground().clearColorFilter(); on the four buttons. and Repository is just a static class with example question data.
It all goes terribly wrong, when I have more then one view. On each fragment I inflate the same xml with same View IDs, as I have defined them. And as I now understand calling findViewById retrieves not one, but all views with that Id from my current, but also from my previous and next fragment as well. So every time I want to select my current fragment's view, I also modify the same view in the previous and next fragments as well. You can imagine how this is problematic. This makes me feel I have a fundamental mistake, because I don't think there is supposed to be more then one View with same ID.
I really don't understand how I should do this using ViewPager. At this point it feels like I'm trying to make a wood carving, but instead I am hacking the framework to pieces. There must be a better way to do this with ViewPager.
RESOLVED: Thanks to Soo Chun Jung for pointing me to the answer. In short what got it working for me was:
Passing my Question model id to each fragment with Bundle.
Storing each fragment in inside an ArrayMap with fragment position as key and fragment as value.
Getting each individual fragment from my selectAnswer function is now easy: first get the current fragment's position with myViewPager.getCurrentItem, then calling getter function which returns a fragment on the current position.
Now that I have the fragment I can easily change its button's because they are kept as private fields, assigned in the 'onCreateView` method.
Hope it's helpful~
adapter
class CustomAdapter extends FragmentPagerAdapter {
private final String[] TITLES = {"A", "B"};
private final String TAG = CustomAdapter.class.getSimpleName();
private final ArrayList<Fragment> mFragments;
private final FragmentManager fm;
public CustomAdapter(FragmentManager fm) {
super(fm);
mFragments = new ArrayList<>(getCount());
this.fm = fm;
}
#Override
public CharSequence getPageTitle(int position) {
return TITLES[position];
}
#Override
public int getCount() {
return TITLES.length;
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
Log.d(TAG, "destroyItem position = " + position);
mFragments.remove(object);
super.destroyItem(container, position, object);
}
#Override
public Object instantiateItem(ViewGroup container, int position) {
Object object = super.instantiateItem(container, position);
mFragments.add((Fragment) object);
return object;
}
#Override
public Fragment getItem(int position) {
Log.d(TAG, "getItem position = " + position);
if (position == 0) {
return MyFragmentA.newInstance();
} else if (position == 1) {
return MyFragmentB.newInstance();
}
return null;
}
public MyFragmentA getMyFragmentA() {
synchronized (mFragments) {
for (Fragment f : mFragments) {
if (f instanceof MyFragmentA) {
return (MyFragmentA) f;
}
}
}
return null;
}
public MyFragmentB getMyFragmentB() {
synchronized (mFragments) {
for (Fragment f : mFragments) {
if (f instanceof MyFragmentB) {
return (MyFragmentB) f;
}
}
}
return null;
}
}
Fragment class
public class MyFragmentB extends Fragment {
...
public updateYourUI(){
//update something
}
}
Usage
mPager = (CustomViewPager) findViewById(R.id.pager);
mAdapter = new CustomAdapter(getChildFragmentManager());
mPager.setAdapter(mAdapter);
mAdapter.getMyFragmentB().updateYourUI();
for your comment below If you only have one kind Fragment. You can modify some function like this.
public static MyFragmentB newInstance(int ID) {
MyFragmentB fragment = new MyFragmentB();
Bundle bundle = new Bundle();
bundle.putInt("ID", ID);
fragment.setArguments(bundle);
return fragment;
}
#Override
public void onViewCreated(View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
myID = getArguments().getInt("ID");
....
}
public int getMyID() {
return myID;
}
public MyFragmentB getMyFragmentByID(String id) {
synchronized (mFragments) {
for (Fragment f : mFragments) {
if (f instanceof MyFragmentB) {
MyFragmentB temp = (MyFragmentB)f;
if(temp.getID.equals(id){
return (MyFragmentB) f;
}
}
}
}
return null;
}
enter image description here
Before reading the question, please refer to image.
I am using viewpager to show the fragment.
Problem
In the fragment, I have used two edittext lets say editText1, editText2 now the problem is how I will get the editText data. I can only get the editText values when user click on next button but the next button is outside of fragment. How do I access the editText outside the fragment.
Before downvoting the question, let me know the reason so that I can improve my question.
Fragment java class
// newInstance constructor for creating fragment with arguments
public static BpDetails newInstance(int page) {
BpDetails fragmentFirst = new BpDetails();
Bundle args = new Bundle();
args.putInt("someInt", page);
fragmentFirst.setArguments(args);
return fragmentFirst;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
page = getArguments().getInt("someInt", 0);
}
// Inflate the view for the fragment based on layout XML
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final View view = inflater.inflate(R.layout.bp_details, container, false);
Log.i("View ",view.toString());
Log.i("DOB is ",Long.toString(Constants.dob));
systolic =(EditText) view.findViewById(R.id.systolic);
diastolic =(EditText) view.findViewById(R.id.diastolic);
return view;
}
ViewPager Activity
vpPager = (ViewPager) findViewById(R.id.view_pager);
adapterViewPager = new MyPagerAdapter(getSupportFragmentManager());
vpPager.setAdapter(adapterViewPager);
Fragment fragment=adapterViewPager.getItem(prevPage);
if (fragment.getClass().equals(BpDetails.class)){
Log.i("Call ","Yes");
}
findViewById(R.id.btn_prev).setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// checking for last page
// if last page home screen will be launched
int current = getItem(-1);
if (current!=0)
prevPage=current-1;
if (current < 4) {
// move to next screen
vpPager.setCurrentItem(current);
} else {
//final reached.
}
}
});
findViewById(R.id.btn_next).setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// checking for last page
// if last page home screen will be launched
int current = getItem(+1);
if (current!=0)
prevPage=current-1;
System.out.println("Prev page "+prevPage);
if (current < 4) {
// move to next screen
Fragment prevFragment=adapterViewPager.getItem(prevPage);
} else {
//final reached.
}
}
});
}
private int getItem(int i) {
return vpPager.getCurrentItem() + i;
}
public static class MyPagerAdapter extends FragmentPagerAdapter {
private static int NUM_ITEMS = 4;
private static int mSelectedPosition;
public MyPagerAdapter(FragmentManager fragmentManager) {
super(fragmentManager);
//mSelectedPosition=selectedPosition;
}
// Returns total number of pages
#Override
public int getCount() {
return NUM_ITEMS;
}
// Returns the fragment to display for that page
#Override
public Fragment getItem(int position) {
switch (position) {
case 0: // Fragment # 0 - This will show FirstFragment
return BasicDetails.newInstance(0);
case 1:
return BpDetails.newInstance(1);
case 2:
return BslDetails.newInstance(2);
case 3:
return Summary.newInstance(3);
default:
return null;
}
}
}
Create two getters inside your fragment like this.
public String getSystolic(){
return this.systolic.getText().toString();
}
public String getDiastolic(){
return this.diastolic.getText().toString();
}
BpDetails fr = (BpDetails)myAdapter.getItem(myViewPager.getCurrentItem());
String systolicString = fr.getSystolic();
I had a similar issue. .getItem() instantiates a new Fragment, so upon calling myAdapter.getItem(...) you would be getting null for all elements in the Fragment, but not null for the Fragment.
When I fixed this, what I had to do was create another method inside of MyPagerAdapter called getInstantiatedFragment:
public Fragment getInstantiatedFragment(int position)
{
return fragments.get(position);
}
fragments is a new field for the class:
private ArrayList<Fragment> fragments = new ArrayList<>();
I would override getItem() (as you have done already) and change it to:
#Override
public Fragment getItem(int position)
{
switch (position) {
case 0:
BasicDetails basicDetails = BasicDetails.newInstance(0);
fragments.add(basicDetails);
return basicDetails;
...
}
where you're adding the fragment to fragments before returning, then you would call:
BpDetails fr = (BpDetails)myAdapter.getInstantiatedItem(myViewPager.getCurrentItem());
to get the instance of the created fragment and then call
String systolicString = fr.getSystolic();
if you're using the previous answer's method.
This is so that you can keep track of the instantiated fragments in fragments. I'm sure there are better ways.
I have created two fragments in a ViewPager , when I click on first one , Second fragment is taking the click.
This issue puts me in another position, when I create two instance from same fragment but with different data.
{
#Override
public Fragment getItem(int index) {
switch (index) {
case 1:
return FragmentBrandList.getInstance(tabs.getBrandList2(), 19,
title);
case 0:
return FragmentBrandList.getInstance(tabs.getBrandList1(), 19,
title);
}
return null;
}
#Override
public int getCount() {
return 2;
}
}
After creating ViewPager , both the fragments get created correctly , but when I click on any thing in the first fragment , the click event gets fired in second fragment not in the first fragment.
EDIT
public class TabsPagerAdapter extends FragmentPagerAdapter {
public TabsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int index) {
switch (index) {
case 1:
return FragmentBrandList.getInstance(tabs.getBrandList2(), 19,
title);
case 0:
return FragmentBrandList.getInstance(tabs.getBrandList1(), 19,
title);
}
return null;
}
#Override
public int getCount() {
return 2;
}
in FragmentBrandList
public class FragmentBrandList extends Fragment {
ArrayList<Brand> brandList = new ArrayList<Brand>();
int discoverID;
RecyclerView listView;
LinearLayoutManager mLayoutManager;
public static FragmentBrandList getInstance(ArrayList<Brand> brandList,
int discoverID, String title) {
FragmentBrandList frag = new FragmentBrandList();
Bundle b = new Bundle();
b.putSerializable("brandList", brandList);
b.putInt("discoverID", discoverID);
b.putString("title", title);
frag.setArguments(b);
return frag;
}
public FragmentBrandList() {
}
String title = "";
View v;
boolean isInflated = false;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
if (v == null) {
v = inflater.inflate(R.layout.fragment_list_view_brownbg,
container, false);
isInflated = true;
} else {
isInflated = false;
((ViewGroup) v.getParent()).removeView(v);
}
return v;
}
MainActivity activity;
#Override
public void onActivityCreated(#Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
if (isInflated) {
activity = (MainActivity) getActivity();
initView();
}
}
public void initView(){
title = getArguments().getString("title");
discoverID = getArguments().getInt("discoverID");
listView = (RecyclerView) v.findViewById(R.id.listView);
mLayoutManager = new LinearLayoutManager(getActivity());
listView.setItemAnimator(new DefaultItemAnimator());
listView.setHasFixedSize(true);
listView.setLayoutManager(mLayoutManager);
listView.setAdapter(new BrandListRecAdapter(getActivity(),
R.layout.single_item_listview, brandList));
}
#Override
public void onResume() {
// handle on click
((BrandListRecAdapter) listView.getAdapter())
.setOnItemClickListener(new ItemClickListener() {
#Override
public void onItemClickListener(final int pos, View v) {
activity.replaceCurrentFragment(
FragmentBrandDetails.getInstance(
brandList.get(pos), "bank"), true,
true);
}}
EDIT
i think problem cause
when create second fragment , listview.onclick is overwrite first one !!
how can solve this peb?
EDIT
thank you to every one try to help me
problem is already because i use same adapter and same fragment
when second fragment created it is overwrite on item click
so when click in item is called second one !!!
Just put this android:clickable="true" in every fragment layout, and this will not happen again.
This is just an educated guess, but because a ViewPager will always create at least one extra Fragment on either side of the currently visible fragment, you may be creating two virtually identical Fragments in parallel, assigning them both onItemClickListeners in onResume and as such they are both responding to item clicks when an item is pressed on either Fragment.
You could try moving the onItemClickListener to the ViewHolder in your Adapter, rather assigning it in onResume. In addition, I wonder what a Brand object looks like in your RecyclerView, and whether it wouldn't be simpler to pass the current ViewPager page as a parameter in getInstance, and use this to access an Array containing the information necessary to fill your RecyclerView rows.
Here is a very brief example of how your ViewHolder may look:
class MyRecyclerViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener
public MyRecyclerViewHolder(View itemView) {
itemView.setOnClickListener(this);
//etc.
I have seen a lot of answered questions about this, but none about what I exactly want so here it goes (if there's an answered thread about this I'd appreciate it):
I want to create a kind of "level selection" app, where you basically have to swipe from right to left in order to be able to see the next list of levels, however I want to do it WITHOUT tabs (haven't found out how to do it yet).
Thanks.
EDIT: Solved it by simply using a ViewPager without even bothering or paying attention to the ActionBar part Android tells you to add (I just created my few fragments, my viewpager, and this last one did the rest, didn't even need to use a gesture detector for swipes as viewpager already provides this animation).
Any ViewPager Tutorial teaching you how to swipe between tabs basically has all the information I needed :) Thanks everyone!
For doing this you shiuld use ViewPager
Its easy !
Layout ViewPager
<android.support.v4.view.ViewPager
android:id="#+id/vpPager"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</android.support.v4.view.ViewPager>
Define Fragments
public class FirstFragment extends Fragment {
// Store instance variables
private String title;
private int page;
// newInstance constructor for creating fragment with arguments
public static FirstFragment 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;
}
// 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");
}
// Inflate the view for the fragment based on layout XML
#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;
}
}
Setup FragmentPagerAdapter
public class MainActivity extends FragmentActivity {
// ...
public static class MyPagerAdapter extends FragmentPagerAdapter {
private static int NUM_ITEMS = 3;
public MyPagerAdapter(FragmentManager fragmentManager) {
super(fragmentManager);
}
// Returns total number of pages
#Override
public int getCount() {
return NUM_ITEMS;
}
// Returns the fragment to display for that page
#Override
public Fragment getItem(int position) {
switch (position) {
case 0: // Fragment # 0 - This will show FirstFragment
return FirstFragment.newInstance(0, "Page # 1");
case 1: // Fragment # 0 - This will show FirstFragment different title
return FirstFragment.newInstance(1, "Page # 2");
case 2: // Fragment # 1 - This will show SecondFragment
return SecondFragment.newInstance(2, "Page # 3");
default:
return null;
}
}
// Returns the page title for the top indicator
#Override
public CharSequence getPageTitle(int position) {
return "Page " + position;
}
}
}
Apply the Adapter
public class MainActivity extends FragmentActivity {
FragmentPagerAdapter adapterViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
ViewPager vpPager = (ViewPager) findViewById(R.id.vpPager);
adapterViewPager = new MyPagerAdapter(getSupportFragmentManager());
vpPager.setAdapter(adapterViewPager);
}
// ...
}
Setup OnPageChangeListener
// Attach the page change listener inside the activity
vpPager.setOnPageChangeListener(new OnPageChangeListener() {
// This method will be invoked when a new page becomes selected.
#Override
public void onPageSelected(int position) {
Toast.makeText(HomeActivity.this,
"Selected page position: " + position, Toast.LENGTH_SHORT).show();
}
// 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
}
});
if you need more info see this link (it also explain how to use tabs) :
https://github.com/codepath/android_guides/wiki/ViewPager-with-FragmentPagerAdapter
You have to use HorizontalScrollView (http://developer.android.com/reference/android/widget/HorizontalScrollView.html) which will manage horizontall scroll by himself. Juste place other view inside and you're good.
Edit: Solved it by simply using a ViewPager without even bothering or paying attention to the ActionBar part Android tells you to add (I just created my few fragments, my viewpager, and this last one did the rest, didn't even need to use a gesture detector for swipes as viewpager already provides this animation).
Any ViewPager Tutorial teaching you how to swipe between tabs basically has all the information I needed :) Thanks everyone!
I have a viewPager with say 4 pages. All 4 pages uses same Xml. When i do an event in 1st page somehow it always triggers in the last page.
Here is my PagerAdapter
#Override
public Object instantiateItem(ViewGroup container, int pos) {
View desktopView;
OnTouchListener tl = null;
desktopView = act.getLayoutInflater().inflate(
act.getViewPagerLayout(groupName), null);
RelativeLayout rr_appContainer, rr_dialogContainer;
ImageView rr_home_container = (ImageView) desktopView
.findViewById(R.id.imageView_forClick);
Button buttonChange = (Button)desktopView.findViewById(R.id.B1);
Button buttonDelete = (Button)desktopView.findViewById(R.id.B2);
rr_appContainer = (RelativeLayout) desktopView
.findViewById(R.id.rr_home_container);
rr_dialogContainer = (RelativeLayout) desktopView
.findViewById(R.id.rr_dialogView);
..........
buttonDelete.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
deletestuff();
}
buttonChange.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
changeColorOfStuff();
}
.....
return desktopView;
}
What is happening is, When i click on buttonChange from 1st page it supposed to change the color of text on 1st page, but actually it is changing color of the last page. Similarly buttonDelete is deleting color from last page.
Regardless of what page i am in, its reflecting those changes on last page.
Any help would be appreciated.
From the context given here, the deleteStuff() and changeColorOfStuff() can only be members of the Fragment/Activity that owns the adapter, or the adapter itself. So these methods can only act on members of those classes. ViewPager asks the adapter for the fragments it is going to display. However, the text in the fragment being shown by the ViewPager belong to the that fragment. To act on that text, you need a method that's a member of that fragment. The usual way to do this is to use a custom fragment. For example:
Custom Fragment (inner class):
public static class CustomFragment extends Fragment {
//members of the fragment
TextView yourTextView;
...
public static CustomFragment newInstance(int pos) {
CustomFragment fragment = new CustomFragment();
//get whatever info you need for this page
Bundle args = getInfoSomehow(pos);
fragment.setArguments(args)
return fragment;
}
#Override
public View onCreateView(Layout inflater, ViewGroup container, Bundle savedInstanceState) {
View root = inflater.inflate(....
yourTextView = root.findViewById(...) //this is the text view you want to change things in
//all the stuff you're currently doing in instantiateItem()
return root;
}
private void deleteStuff() {
//whatever you need to do. But notice that here it's acting on the TextView that belongs to this particular fragment
}
private void changeColorOfStuff() {...}
...
}
Then in your instantiateItem(...)
#Override
public Object instantiateItem(ViewGroup container, int pos) {
return CustomFragment.newInstance(pos);
}