I am trying to refresh the current fragment in the tabbed layout of my viewpager. I have one fragment (UserProgressFragment) that creates the ViewPager and sets the adapter (UserProgressAdapter) along with creating tabbed layout.
In my UserProgressAdapter, in the getItem() method I am returning two other fragments, (UserWeightTrackerFragment and UserCalorieCounterFragment) based on which tab i am on.
My issue is how do i refresh the fragment and update its content/view from the UserCalorieCounterFragment on a button click, because access to the viewpager and adapter are set in the UserProgressFragment? I have considered notifyDataChange for the adapter but i dont know how to call this from this class as it is set up on the UserProgressFragment class. The purpose of wanting to refresh this page is to update a specific view which is a chart, if context is needed.
I have attached the code below:
UserProgressFragment
public class UserProgressFragment extends Fragment{
public static UserProgressFragment newInstance() {
return new UserProgressFragment();
}
public UserProgressFragment() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_user_progress, container, false);
ViewPager viewPager = view.findViewById(R.id.progress_viewpager);
viewPager.setAdapter(new UserProgressTabsAdapter(getChildFragmentManager()));
TabLayout tabLayout = view.findViewById(R.id.progress_sliding_tabs);
tabLayout.setupWithViewPager(viewPager, true);
return view;
}
}
UserProgressTabsAdapter
public class UserProgressTabsAdapter extends FragmentStatePagerAdapter {
private static final int PAGE_COUNT = 2;
private String tabTitles[] = new String[]{"Weight Tracker", "Calorie Counter"};
public UserProgressTabsAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return UserWeightTrackerFragment.newInstance(position);
case 1:
return UserCalorieCounterFragment.newInstance(position + 1);
}
return null;
}
#Override
public int getCount() {
return PAGE_COUNT;
}
#Override
public CharSequence getPageTitle(int position) {
// Generate title based on item position
return tabTitles[position];
}
UserCalorieCounterFragment (need to refresh this one)
public class UserCalorieCounterFragment extends Fragment implements View.OnClickListener, AdapterView.OnItemSelectedListener {
public static final String ARG_PAGE = "ARG_PAGE";
public static UserCalorieCounterFragment newInstance(int page) {
Bundle args = new Bundle();
args.putInt(ARG_PAGE, page);
UserCalorieCounterFragment fragment = new UserCalorieCounterFragment();
fragment.setArguments(args);
return fragment;
}
public UserCalorieCounterFragment() {
// Required empty public constructor
}
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
int mPage = getArguments().getInt(ARG_PAGE);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_user_calorie_counter, container, false);
Button mAddCalories = view.findViewById(R.id.btn_add_calorie);
mAddCalories.setOnClickListener(this);
return view;
}
#Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.btn_add_calorie:
//REFRESH/UPDATE HERE
break;
}
}
You can create a public method in your fragment which contains the view pager which will contain the notifyDataSetChanged() function. And in the view pager fragment/item, you can call getParentFragment() and type cast it to your parent/first fragment and access that public method to notifyDataSetChanged().
Related
Description:
I have an activity (Father activity) which has a fragment (Father fragment) inside. This fragment is tabbed and has two fragments (Fragment A and Fragment B) that are changed with view pager.
Father activity sends data to Father fragment which has to take them to Fragment B
Question:
What can I do with Father fragment to take data to Fragment B (which is inside a view pager)?
Extra:
Someone told me I can use interface and I've tried to study it but I couldn't find any good tutorial / explanation.
Hi #Tomas I have Done like this
private class ViewPagerAdapter extends FragmentPagerAdapter {
private Fragment fragment1 = Fragment1.getInstance();
private Fragment fragment2 = Fragmen2.getInstance();
ViewPagerAdapter(FragmentManager supportFragmentManager) {
super(supportFragmentManager, BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT);
}
#Override
public Fragment getItem(int position) {
if (position == 0) {
return fragment1;
} else {
return fragment2;
}
}
#Override
public int getCount() {
return 2 ;
}
#Override
public CharSequence getPageTitle(int position) {
return "";
}
Fragment1 getFragment1() {
return (Fragment1) fragment1;
}
Fragment2 getFragment2() {
return (Fragment2) fragment2;
}
}
this is my Fragemnt2 code:
public class Fragment2 extends Fragment {
private TextView text;
public static Fragment2 getInstance() {
return new Fragment2();
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragmant_2, container, false);
}
#Override
public void onViewCreated(#NonNull View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
text = view.findViewById(R.id.text2);
}
public void reloadView(String data){
text.setText(data);
}
}
and from viewpager adapter I call method of faragment 2 like this
adapter.getFragment1().reloadView("data");
I have a fragment that Contains view pager.there are three fragments in that Main fragment they are Fragment A,Fragment B,Fragment C. Upto this code runs properly.
Then i added a new Fragment and called via Fragment A then i got the error in the Log
No view found for id 0x7f0d0083 (com.app.sanyog:id/frame) for fragment SearchPlaces{289bf4e #0 id=0x7f0d0083}
Main Fragment:
/**
* Created by Admin on 04-06-2015.
*/
public class ContentFragment_Flight_Bkg extends Fragment {
private View view;
public ViewPager pager;
private TabsPagerAdapter mAdapter;
private ActionBar actionBar;
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.content_fragment_flight,container,false);
TabsPagerAdapter adapter = new TabsPagerAdapter(getFragmentManager());
pager = (ViewPager)view.findViewById(R.id.pager);
pager.setAdapter(adapter);
return view;
}
}
Pager Adapter
public class TabsPagerAdapter extends FragmentPagerAdapter {
final int PAGE_COUNT = 3;
// Tab Titles
private String tabtitles[] = new String[] { "One Way", "Round Trip", "Multicity" };
Context context;
public TabsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public int getCount() {
return PAGE_COUNT;
}
#Override
public Fragment getItem(int position) {
switch (position) {
// Open FragmentTab1.java
case 0:
OneWayTab fragmenttab1 = new OneWayTab();
return fragmenttab1;
// Open FragmentTab2.java
case 1:
RoundTripTab fragmenttab2 = new RoundTripTab();
return fragmenttab2;
// Open FragmentTab3.java
case 2:
MultiCityTab fragmenttab3 = new MultiCityTab();
return fragmenttab3;
}
return null;
}
#Override
public CharSequence getPageTitle(int position) {
return tabtitles[position];
}
}
Fragment A
public class OneWayTab extends Fragment {
private LinearLayout oneway_source,oneway_destiantion;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Get the view from fragmenttab3.xml
View view = inflater.inflate(R.layout.content_one_way_tab, container, false);
oneway_source = (LinearLayout)view.findViewById(R.id.oneway_source_layout);
oneway_destiantion = (LinearLayout)view.findViewById(R.id.oneway_destination_layout);
oneway_source.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
SearchPlaces fragment_Flight= new SearchPlaces();
android.support.v4.app.FragmentTransaction fragmentTransaction_Flight = getChildFragmentManager().beginTransaction();
fragmentTransaction_Flight.replace(R.id.frame,fragment_Flight,"FLight_booking");
fragmentTransaction_Flight.commit();
}
});
oneway_destiantion.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Utils.showToast(getActivity(),"Destiantion");
}
});
return view;
}
}
New Fragment (Called from Fragment A)
public class SearchPlaces extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Get the view from fragmenttab1.xml
View view = inflater.inflate(R.layout.content_search_places, container, false);
return view;
}
}
I'm having an issue with the support library ViewPager. That ViewPager lives inside a fragment and it's composed of 3 tabs: one that will show some information, the second and third show a list of elements (so they both are beeing generated from the same fragment). When I scroll from the first to the second one everything works fine but if I try to scroll from the second one to the third something happens to the fragments and they don't show up again even the PagerTabStrip disappears when this happens. Also I tryed using the same type of fragment for the 3 tabs (the one that disappeared with the list)and everything seems to work fine, so I'm quite bugged about this. Also, the only log on the console related to the issue is this one:
W/FragmentManager: moveToState: Fragment state for StoreListFragment{3fb980e7 #2 id=0x7f0d0080 android:switcher:2131558528:2} not updated inline; expected state 3 found 2
This is the code for my parent Fragment:
public class StoreFragment extends Fragment {
#Bind(R.id.pager) ViewPager mPager;
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_store, container, false);
ButterKnife.bind(this, v);
setupViewPager();
return v;
}
private void setupViewPager() {
String[] titles = {getString(R.string.store_information),
getString(R.string.store_offers),
getString(R.string.store_products)
};
mPager.setAdapter(new StoresPagerAdapter(getChildFragmentManager(), titles));
}
}
This is the code for the PagerAdapter:
public class StoresPagerAdapter extends FragmentPagerAdapter {
private String[] mPageTitles;
public StoresPagerAdapter(FragmentManager fm, String[] titles) {
super(fm);
mPageTitles = titles;
}
#Override
public Fragment getItem(int position) {
switch (position){
case 0:
return StoreInfoFragment.newInstance();
//return StoreListFragment.newInstance(position);
case 1:
return StoreListFragment.newInstance(position);
case 2:
return StoreListFragment.newInstance(position);
default:
return null;
}
}
#Override
public int getCount() {
return mPageTitles != null ? mPageTitles.length : 0;
}
#Override
public CharSequence getPageTitle(int position) {
return mPageTitles[position];
}
}
And the one for the Fragment:
public class StoreListFragment extends Fragment implements MyListListener {
#Bind(R.id.store_list) RecyclerView mStoreContentView;
private ArrayList<StoreModel> mStoreContents = new ArrayList<>();
public static StoreListFragment newInstance(int page) {
return new StoreListFragment();
}
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mStoreContents.add(new Schedule());
}
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_store_list, container, false);
ButterKnife.bind(this, v);
return v;
}
#Override
public void onActivityCreated(#Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
setupList();
}
protected void setupList() {
LinearLayoutManager layoutManager = new LinearLayoutManager(this.getActivity());
mStoreContentView.setHasFixedSize(true);
mStoreContentView.setLayoutManager(layoutManager);
mStoreContentView.setAdapter(new ArrayAdapter(this, mStoreContents, R.layout.list_elem_locations));
}
#Override
public void onClickElement(int elementId, String elementName) {
Intent i = new Intent(this.getActivity(), DetailActivity.class);
startActivity(i);
}
}
I think your problem is here:
public static StoreListFragment newInstance(int page) {
return new StoreListFragment();
}
You're not using this page anywhere and you're getting two completely same StoreListFragments. You should add:
Bundle args = new Bundle();
args.putInt("key", page);
fragment.setArguments(args);
And then use this differentiation somewhere.
I am trying to swipe item(from listview) in my detail activity using viewpager.
I have 20 items in my listview (data parsed from json) Instead of swiping the next/previous item , It's only the same item that I swipe (20 times).
here is my DetailActivity.
public class DetailsActivity extends FragmentActivity {
Article feed;
int pos;
private DescAdapter adapter;
private ViewPager pager;
...
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.item_details);
pos = getIntent().getExtras().getInt("pos");
adapter = new DescAdapter(getSupportFragmentManager());
pager = (ViewPager) findViewById(R.id.pager);
pager.setAdapter(adapter);
pager.setCurrentItem(pos);
}
public class DescAdapter extends FragmentStatePagerAdapter {
public DescAdapter(FragmentManager fm) {
super(fm);
}
#Override
public int getCount() {
return 20;
}
public Fragment getItem(int position) {
return DetailFragment.newInstance(position);
}
}
And my detailFragment
public class DetailFragment extends Fragment {
static DetailFragment newInstance(int position) {
DetailFragment f = new DetailFragment();
return f;
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.detail_fragment, container, false);
String displaytitle= getActivity().getIntent().getStringExtra("title");
TextView titleF = (TextView)view.findViewById(R.id.title);
titleF.setText(displaytitle);
...
return view;
}
What am I doing wrong?
You are not using the correct argument:
You send the argument "pos2" but you retrieve the argument "title".
#Override
public Fragment getItem(int position) {
DetailFragment frag = new DetailFragment();
Bundle bundle = new Bundle();
bundle.putInt("fPos",position);
frag.setArguments(bundle);
return frag;
}
I created a ViewPager that uses individual Fragments. There are 3, here is an example of one of them:
public class PainFragment extends Fragment {
private TextView mTxtScale;
private Button mBtnMinus;
private Button mBtnPlus;
private int mScale;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_pain, container, false);
mTxtScale = (TextView)v.findViewById(R.id.scale);
mBtnMinus = (Button)v.findViewById(R.id.minus);
mBtnPlus = (Button)v.findViewById(R.id.plus);
mScale = Integer.valueOf(mTxtScale.getText().toString());
mBtnMinus.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
mScale--;
if(mScale == -1) {
mScale = 9;
}
mTxtScale.setText(String.valueOf(mScale));
}
});
mBtnPlus.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
mScale++;
if(mScale == 10) {
mScale = 0;
}
mTxtScale.setText(String.valueOf(mScale));
}
});
return v;
}
public static PainFragment newInstance(String text) {
PainFragment f = new PainFragment();
Bundle b = new Bundle();
//b.putString("msg", text);
f.setArguments(b);
return f;
}
public int getScale() {
int scale = Integer.valueOf(mTxtScale.getText().toString());
return scale;
}
And I instantiated the ViewPager in my MainFragment:
public class MainFragment extends Fragment {
Entry mEntry = new Entry();
ViewPager mPager;
JournalPagerAdapter mAdapter;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main_screen, container, false);
mPager = (ViewPager)rootView.findViewById(R.id.pager);
mPager.setOffscreenPageLimit(2); // So all 3 pages are loaded at once.
mAdapter = new JournalPagerAdapter(getActivity().getSupportFragmentManager());
mPager.setAdapter(mAdapter);
...
I have button click listeners in the ViewPager Fragments. I would like to know the best way to set up a listener so that my main fragment can detect when a button is pressed on one of the ViewPager fragments.
/** Update - Here is my adapter class **/
public class JournalPagerAdapter extends FragmentPagerAdapter {
SparseArray<Fragment> registeredFragments = new SparseArray<Fragment>();
public JournalPagerAdapter(FragmentManager mgr) {
super(mgr);
}
#Override
public Fragment getItem(int pos) {
switch(pos) {
case 0: return PainFragment.newInstance("PainFragment");
case 1: return StressFragment.newInstance("StressFragment");
case 2: return SleepFragment.newInstance("SleepFragment");
default: return PainFragment.newInstance("PainFragment");
}
}
#Override
public int getCount() {
return 3;
}
/* Thanks to Streets of Boston (http://stackoverflow.com/questions/8785221/retrieve-a-fragment-from-a-viewpager)
* for the next 3 methods, should include in all PagerAdapters. Let's you get the fragment instances by position */
#Override
public Object instantiateItem(ViewGroup container, int position) {
Fragment fragment = (Fragment) super.instantiateItem(container, position);
registeredFragments.put(position, fragment);
return fragment;
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
registeredFragments.remove(position);
super.destroyItem(container, position, object);
}
public Fragment getRegisteredFragment(int position) {
return registeredFragments.get(position);
}
}
Second answer with pseudo example of using a ClickListener instead of the Callback. This should let you keep all logic out of the Activity.
Implement OnClickListener interface in MainFragment. Add a OnClickListener to your JournalPagerAdapter constructor. Presumably the Adapter is creating the PainFragments. Add OnClickListener to PainFragment newInstance and have the Adapter provide it when it creates each PainFragment.
public class PainFragment extends Fragment {
private TextView mTxtScale;
private Button mBtnMinus;
private Button mBtnPlus;
private int mScale;
protected OnClickListener mainClickListener;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_pain, container, false);
mTxtScale = (TextView)v.findViewById(R.id.scale);
mBtnMinus = (Button)v.findViewById(R.id.minus);
mBtnPlus = (Button)v.findViewById(R.id.plus);
mScale = Integer.valueOf(mTxtScale.getText().toString());
mBtnMinus.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
mScale--;
if(mScale == -1) {
mScale = 9;
}
mTxtScale.setText(String.valueOf(mScale));
mainClickListener.onClick(view);
}
});
mBtnPlus.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
mScale++;
if(mScale == 10) {
mScale = 0;
}
mTxtScale.setText(String.valueOf(mScale));
mainClickListener.onClick(view);
}
});
return v;
}
public static PainFragment newInstance(String text, OnClickListener onClickListener) {
PainFragment f = new PainFragment();
f.mainClickListener = onClickListener;
Bundle b = new Bundle();
//b.putString("msg", text);
f.setArguments(b);
return f;
}
public int getScale() {
public class MainFragment extends Fragment implements OnClickListener {
Entry mEntry = new Entry();
ViewPager mPager;
JournalPagerAdapter mAdapter;
#Override
public void onClick(View v)
{
// TODO Auto-generated method stub
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main_screen, container, false);
mPager = (ViewPager)rootView.findViewById(R.id.pager);
mPager.setOffscreenPageLimit(2); // So all 3 pages are loaded at once.
mAdapter = new JournalPagerAdapter(getActivity().getSupportFragmentManager(), this);
mPager.setAdapter(mAdapter);
...
public class JournalPagerAdapter extends FragmentPagerAdapter {
SparseArray<Fragment> registeredFragments = new SparseArray<Fragment>();
private OnClickListener mOnClickListener;
public JournalPagerAdapter(FragmentManager mgr, OnClickListener onClickListener) {
super(mgr);
mOnClickListener = onClickListener;
}
#Override
public Fragment getItem(int pos) {
switch(pos) {
case 0: return PainFragment.newInstance("PainFragment", mOnClickListener);
case 1: return StressFragment.newInstance("StressFragment", mOnClickListener);
case 2: return SleepFragment.newInstance("SleepFragment", mOnClickListener);
default: return PainFragment.newInstance("PainFragment", mOnClickListener);
}
}
...
The proper way to achieve this is probably through the use of a callback. Your fragment would utilize a normal click listener which would then use a callback to communicate back to the hosting Activity.
See the Android docs regarding communicating from a Fragment back to the Activity; then the Activity can communicate it to other Fragments.
http://developer.android.com/guide/components/fragments.html#CommunicatingWithActivity
In some cases, you might need a fragment to share events with the activity. A good way to do that is to define a callback interface inside the fragment and require that the host activity implement it. When the activity receives a callback through the interface, it can share the information with other fragments in the layout as necessary.