I am working on one application which contains dynamic pages,so that i have taken viewpager.I created one fragment dynamically it creates,in that fragment i am calling webservice after success response i am refreshing data ,but fragment is not updating.I am using StatePagerAdapter.
code:
public class CustomPagerAdapter extends FragmentStatePagerAdapter
{
private ArrayList<InstituteVO> _instituteList;
private ArrayList<CourseItemVO> _courses;
public CustomPagerAdapter(FragmentManager fm, ArrayList<InstituteVO> instituteList)
{
super(fm);
_instituteList = instituteList;
_courses=new ArrayList<>();
}
#Override
public Fragment getItem(int position)
{
PagerItemFragment fragment = new PagerItemFragment();
fragment.setItemInfo(_instituteList.get(position), this);
// fragment.setCourses(_courses);
return fragment;
}
#Override
public int getCount()
{
return _instituteList.size();
}
public int getItemPosition(Object item) {
return super.getItemPosition(item);
}
public class PagerItemFragment extends BaseFragment implements OnWebServiceResponseListener,View.OnClickListener
{
private RecyclerView _courseView;
private CourseCustomRecycleAdapter _adapter;
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
View view = inflater.inflate(R.layout.institute_pager_layout, null);
return view;
}
#Override
public void onViewCreated(View view, #Nullable Bundle savedInstanceState)
{
super.onViewCreated(view, savedInstanceState);
setData();
}
private void setData()
{
callDataService(_item);
}
private void callDataService(String slug)
{
WebServiceController.getInstance().serviceGET(this, new InstituteProcessor(), url, AppConstants.METHOD_GET, slug);
}
#Override
public void onWebServiceResponseSuccess(OnWebServiceDataProcessListener response)
{
if (response != null && response instanceof InstituteProcessor)
{
_adapter.setData(((InstituteProcessor)response).getInstituteVO().getCourses());
}
}
}
Related
Activity
public class GroupesActivity extends BaseActivity {
SelectedBundle selectedBundle;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_groupes);
sectionsPagerAdapter = new GroupPagerAdapter(this, getSupportFragmentManager());
viewPager.setAdapter(sectionsPagerAdapter);
tabs.setupWithViewPager(viewPager);
}
private void getAllGroup() {
// api call retrive data
// send data using interface on response
// set data selectedBundle.onBundleSelect(isVisible,calanderModelList,groupModelList,eventModelList);
}
public void setOnBundleSelected(SelectedBundle selectedBundle) {
this.selectedBundle = selectedBundle;
}
public interface SelectedBundle {
void onBundleSelect(boolean isVisible, List<CalanderModel> calanderModelList, List<GroupModel> groupModelList, List<EventModel> eventModelList);
}
}
Frgment
public class FragmentOne extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View root = inflater.inflate(R.layout.fragment_all_groups_fragments, container, false);
// get data only once on oncreateview
((GroupesActivity) getActivity()).setOnBundleSelected(new GroupesActivity.SelectedBundle() {
#Override
public void onBundleSelect(boolean isVisible, List<CalanderModel> calanderModelListtt, List<GroupModel> groupModelList, List<EventModel> eventModelList) {
Log.e("retrive data","data")
}
});
return root;
}
}
GroupPagerAdapter
public class GroupPagerAdapter extends FragmentPagerAdapter {
#StringRes
private static final int[] TAB_TITLES = new int[]{R.string.tab_text_1, R.string.tab_text_2, R.string.tab_text_3};
private final Context mContext;
public GroupPagerAdapter(Context context, FragmentManager fm) {
super( fm);
this.mContext=context;
}
#NonNull
#Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return new AllGroupsFragments();
case 1:
return new HostFragments();
case 2:
return new GuestFragments();
}
return null;
}
#Nullable
#Override
public CharSequence getPageTitle(int position) {
return mContext.getResources().getString(TAB_TITLES[position]);
}
#Override
public int getCount() {
return 3;
}
}
problem
i have three fragments in tabview when i swipe this obove fragment
and then come again in this fragmnet that interface not called and i'm
not getting data from activity
How to get that data again from its parent activity, i need to only
retrive that data from activity on each time of fragments oncreateView
Thanks in adavance ;)
Use setMenuVisibility() method in Fragment to fix the issue.
//In fragments
#Override
public void setMenuVisibility(final boolean isVisible) {
super.setMenuVisibility(isVisible);
if (isVisible) {
//visible to user- do ur stuff
((GroupesActivity) getActivity()).setOnBundleSelected(new
GroupesActivity.SelectedBundle() {
#Override
public void onBundleSelect(boolean isVisible, List<CalanderModel>
calanderModelListtt, List<GroupModel> groupModelList, List<EventModel>
eventModelList) {
Log.e("retrive data","data")
}
});
}
}
the following link may help if you face any issues:
How to determine when Fragment becomes visible in ViewPager
I am working on a simple implementation of ViewPager in android but everytime I swap my screen addOnPageChangeListener works fine but I see unusual values in my logs inside getItem of my FragmentStatePagerAdapter . and my page swaps but I am unable to change fragment into it. and inside my fragment Slider val (log value) remains same and it hits to zero so each-time when Viewpager is swapped i get the same result.
Activity:
public class OnBoardingActivity extends AppCompatActivity {
.....
.....
static final int ITEMS = 3;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_on_boarding);
ButterKnife.bind(this);
StatusBarUtil.setTransparent(this);
StatusBarUtil.setLightMode(this);
initPager();
}
private void initPager() {
sliderAdapter = new SliderAdapter(getSupportFragmentManager());
if(sliderAdapter!=null){
onboard_pager.setAdapter(sliderAdapter);
}
onboard_pager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
if(position==0){
indicators.setImageResource(R.drawable.step1_dots);
}
else if(position==1){
indicators.setImageResource(R.drawable.step2_dots);
}else if(position==2){
indicators.setImageResource(R.drawable.step3_dots);
}
}
#Override
public void onPageSelected(int position) {
}
#Override
public void onPageScrollStateChanged(int state) {
}
});
}
public static class SliderAdapter extends FragmentStatePagerAdapter {
public SliderAdapter(FragmentManager fragmentManager) {
super(fragmentManager);
}
#Override
public Fragment getItem(int position) {
Log.d("OnBoarding","position "+position);
return OnBoardingSlider.newInstance(position);
}
#Override
public int getCount() {
return ITEMS;
}
}
}
Fragment:
public class OnBoardingSlider extends Fragment {
View mView;
int index;
ImageView img;
TextView head_text,sub_head_text;
public static OnBoardingSlider newInstance(int index){
OnBoardingSlider f = new OnBoardingSlider();
Bundle args = new Bundle();
args.putInt("index", index);
f.setArguments(args);
return f;
}
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
mView = inflater.inflate(R.layout.frag_on_boarding_page,container,false);
return mView;
}
#Override
public void onViewCreated(#NonNull View view, #Nullable Bundle savedInstanceState) {
img = mView.findViewById(R.id.onboard_pager_img);
head_text = mView.findViewById(R.id.head_text);
sub_head_text = mView.findViewById(R.id.sub_head_text);
super.onViewCreated(view, savedInstanceState);
switch (index){
case 0:
Log.d("Slider val",""+index);
img.setImageResource(R.drawable.purpleimage_slider);
head_text.setText(getString(R.string.ask));
sub_head_text.setText(getString(R.string.ask_sub_head));
head_text.setTextColor(ContextCompat.getColor(getActivity(),R.color.purple_head));
sub_head_text.setTextColor(ContextCompat.getColor(getActivity(),R.color.purple_head_sub));
break;
case 1:
Log.d("Slider val",""+index);
img.setImageResource(R.drawable.blueimage_slider);
head_text.setText(getString(R.string.ask));
sub_head_text.setText(getString(R.string.ask_sub_head));
head_text.setTextColor(ContextCompat.getColor(getActivity(),R.color.blue_head));
sub_head_text.setTextColor(ContextCompat.getColor(getActivity(),R.color.blue_head_sub));
break;
case 2:
Log.d("Slider val",""+index);
img.setImageResource(R.drawable.greenimage_slider);
head_text.setText(getString(R.string.ask));
sub_head_text.setText(getString(R.string.ask_sub_head));
head_text.setTextColor(ContextCompat.getColor(getActivity(),R.color.green_head));
sub_head_text.setTextColor(ContextCompat.getColor(getActivity(),R.color.green_head_sub));
break;
default:
Log.d("Slider val",""+index);
img.setImageResource(R.drawable.purpleimage_slider);
head_text.setText(getString(R.string.ask));
sub_head_text.setText(getString(R.string.ask_sub_head));
head_text.setTextColor(ContextCompat.getColor(getActivity(),R.color.purple_head));
sub_head_text.setTextColor(ContextCompat.getColor(getActivity(),R.color.purple_head_sub));
}
}
}
You are not getting the arguments after setting them. so
in onCreate
Bundle bundle=getArguments();
index = bundle.getInt("index");
I am new to Android. Please excuse me if it's a silly question:
If i click on button of a Fragment - it has to trigger a test and show the result in other Fragment. So to make things simple, have written a code on button click as follows. It's not working. Please suggest.
My actual intent is to register a log.add BroadcastReceiver, so that anywhere any log error or debug is called, that message has to appear in the TestStatusFragment.
public class TriggerTestFragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_trigger, container, false);
Button stopScheduler = (Button) view.findViewById(R.id.testButton);
stopScheduler.setOnClickListener((View sview) -> {
View teststatusView = inflater.inflate(R.layout.fragment_teststatus, container, false);
TextView textView = (TextView) teststatusView.findViewById(R.id.text_view);
textView.setText("test result....");
});
return view;
}
}
MainActivity.java
private void setupViewPager(ViewPager viewPager) {
ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
adapter.addFragment(new TriggerTestFragment(), "TRIGGERTEST");
adapter.addFragment(new TestStatusFragment(), "TEST STATUS");
viewPager.setAdapter(adapter);
}
Second Fragment:
public class TestStatusFragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
Context context = getContext();
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_teststatus, container, false);
return view;
}
}
Use interface to communicate between them.
Fragment One
public class FragOne extends Fragment {
EditText etxtName, etxtDesc;
Button btnSubmit;
String name, desc;
private OnFragmentInteractionListener mListener;
public FragOne() {
// Required empty public constructor
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_frag_one, container, false);
}
#Override
public void onViewCreated(View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
etxtName = (EditText) view.findViewById(R.id.etxtName);
etxtDesc = (EditText) view.findViewById(R.id.etxtDesc);
btnSubmit = (Button) view.findViewById(R.id.btnSubmit);
btnSubmit.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
name = etxtName.getText().toString().trim();
desc = etxtDesc.getText().toString().trim();
if(name == null || desc == null) {
Toast.makeText(getActivity(), "Both fields required", Toast.LENGTH_SHORT).show();
} else {
mListener.onFragmentInteraction(name, desc);
etxtName.setText("");
etxtDesc.setText("");
}
}
});
}
#Override
public void onAttach(Context context) {
super.onAttach(context);
if (context instanceof OnFragmentInteractionListener) {
mListener = (OnFragmentInteractionListener) context;
} else {
throw new RuntimeException(context.toString()
+ " must implement OnFragmentInteractionListener");
}
}
#Override
public void onDetach() {
super.onDetach();
mListener = null;
}
public interface OnFragmentInteractionListener {
void onFragmentInteraction(String name, String desc);
}
}
Fragment Two
public class FragTwo extends Fragment implements FragOne.OnFragmentInteractionListener{
TextView textView, textDesc;
public FragTwo() {
// Required empty public constructor
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_frag_two, container, false);
}
#Override
public void onViewCreated(View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
textView = (TextView) view.findViewById(R.id.txtName);
textDesc = (TextView) view.findViewById(R.id.txtDesc);
}
#Override
public void onFragmentInteraction(String name, String desc) {
textView.setText(name);
textDesc.setText(desc);
}
}
Init fragments
fragOne = new FragOne();
fragTwo = new FragTwo();
PagerAdapter
public static class MyPagerAdapter extends FragmentPagerAdapter implements FragOne.OnFragmentInteractionListener{
public MyPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return fragOne;
case 1:
return fragTwo;
default:
return null;
}
}
#Override
public int getCount() {
return 2;
}
#Override
public CharSequence getPageTitle(int position) {
return "Page " + position;
}
#Override
public void onFragmentInteraction(String name, String desc) {
fragTwo.onFragmentInteraction(name, desc);
}
}
MainActivity need implement onFragmentInteraction interface
public class MainActivity extends AppCompatActivity implements FragOne.OnFragmentInteractionListener{
static FragOne fragOne;
static FragTwo fragTwo;
MyPagerAdapter myPagerAdapter;
ViewPager viewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
fragOne = new FragOne();
fragTwo = new FragTwo();
viewPager = (ViewPager) findViewById(R.id.viewPager);
myPagerAdapter = new MyPagerAdapter(getSupportFragmentManager());
viewPager.setAdapter(myPagerAdapter);
}
#Override
public void onFragmentInteraction(String name, String desc) {
myPagerAdapter.onFragmentInteraction(name, desc );
}
public static class MyPagerAdapter extends FragmentPagerAdapter implements FragOne.OnFragmentInteractionListener{
public MyPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return fragOne;
case 1:
return fragTwo;
default:
return null;
}
}
#Override
public int getCount() {
return 2;
}
#Override
public CharSequence getPageTitle(int position) {
return "Page " + position;
}
#Override
public void onFragmentInteraction(String name, String desc) {
fragTwo.onFragmentInteraction(name, desc);
}
}
}
You can read full article here https://www.mytrendin.com/passing-data-between-fragments/
I have a FragmentActivity that uses a ViewPager to flip left and right through pages of data (two ListFragments).
public class StopsActivity extends FragmentActivity {
private ViewPager mViewPager;
private PagerTabStrip mPagerTabStrip;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_stops);
mPagerTabStrip =(PagerTabStrip)findViewById(R.id.pager_header);
mViewPager = (ViewPager)findViewById(R.id.pager);
mPagerTabStrip.setDrawFullUnderline(true);
mPagerTabStrip.setTabIndicatorColorResource(R.color.pagerTabStrip);
mViewPager.setAdapter(new StopsAdapter(getSupportFragmentManager()));
mViewPager.setCurrentItem(0);
}
private class StopsAdapter extends FragmentPagerAdapter {
public StopsAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return StopsFragment.newInstance(routename, Stop.FORWARD);
case 1:
return StopsFragment.newInstance(routename, Stop.BACKWARD);
}
return null;
}
#Override
public int getCount() { return 2;}
#Override
public CharSequence getPageTitle(int position) { /* implementation ... */}
}
}
Everything runs ok, but I think that the instantation of the second StopFragment invalidate the data of the first one when getItem is called.
public class StopsFragment extends ListFragment {
private StopsAdapter mStopsAdapter;
private ListView mListView;
private String routename;
private int direction;
public static StopsFragment newInstance(String routename, int direction) {
StopsFragment stopsFragment = new StopsFragment();
// Supply arguments
Bundle args = new Bundle();
args.putString("routename", routename);
args.putInt("direction", direction);
stopsFragment.setArguments(args);
return stopsFragment;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Setup the adapter
ArrayList<Stop> stops = ...
mStopsAdapter = new StopsAdapter(getActivity(), stops);
setRetainInstance(true);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle inState) {
View rootView = inflater.inflate(R.layout.fragment_stops, container, false);
// Attach the adapter
mListView = (ListView) rootView.findViewById(android.R.id.list);
mListView.setAdapter(mStopsAdapter);
return rootView;
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
}
}
The page "IDA" corresponds to StopFragment with argument Stop.FORWARD and the page "VUELTA" corresponds the StopFragment with argument Stop.BACKWARD. As you can see in the images below, just one of them (the last one instantiate) is populated:
What I'm doing wrong?
EDIT
This is StopsAdapter
class StopsAdapter extends BaseAdapter {
private ArrayList<Stop> stops;
private LayoutInflater inflater;
public StopsAdapter(Context context, ArrayList<Stop> stops) {
this.stops = stops;
this.inflater = LayoutInflater.from(context);
}
#Override
public int getCount() {
return stops.size();
}
#Override
public Object getItem(int position) {
return stops.get(position);
}
#Override
public long getItemId(int position) {
return (long)position;
}
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
convertView = inflater.inflate(R.layout.item_stop, parent, false);
}
TextView name = (TextView)convertView.findViewById(R.id.tvStopName);
TextView description = (TextView)convertView.findViewById(R.id.tvStopDescription);
Stop stop = (Stop)getItem(position);
name.setText(stop.name);
if (stop.info != null) {
description.setText(stop.info);
}
return convertView;
}
}
Ok, my fault. The code that was giving me problems is the only that I haven't posted (ArrayList<Stop> stops = ...). The code about Fragments and ViewPager works correctly.
I have a CarsFragment which is inculde cars. One page is one trade (Ferrari, Mercedes) and on every page has a list with models of actual trade.
The main view:
public class CarsFragment extends Fragment {
#Override
public View onCreateView(final LayoutInflater inflater, final ViewGroup container, final Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.cars_fragment, container, false);
pager = (ViewPager) view.findViewById(R.id.carsPager);
adapter = new CarsPagerAdapter(getChildFragmentManager());
pager.setAdapter(adapter);
return view;
}
}
Adapter:
public class CarsPagerAdapter extends FragmentStatePagerAdapter {
private final FragmentManager fm;
private String[] cars = new String[]{"Ferrari","Mercedes"};
public MatchesPageAdapter(final FragmentManager fm) {
super(fm);
this.fm = fm;
}
#Override
public int getCount() {
return cars.length;
}
#Override
public Fragment getItem(final int position) {
return FragmentModelList.newInstance(cars[position]);
}
#Override
public void destroyItem(final ViewGroup container, final int position, final Object object) {
super.destroyItem(container, position, object);
}
}
List:
public class FragmentModelList extends Fragment {
public static FragmentModelList newInstance(String trade) {
FragmentModelList fragmentModelList = new FragmentModelList();
Bundle args = new Bundle();
args.putString("trade", trade);
fragmentModelList.setArguments(args);
return fragmentModelList;
}
#Override
public View onCreateView(final LayoutInflater inflater, final ViewGroup container, final Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_matches_list_view, container, false);
list = (ListView) view.findViewById(R.id.modelList);
return view;
}
#Override
public void onActivityCreated(final Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
modelListAdapter = new ModelListAdapter(getActivity());
list.setAdapter(modelListAdapter);
loadModels();
}
private void loadModels() {
new AsyncTask<Void, Void, Boolean>() {
#Override
protected Boolean doInBackground(final Void... params) {
try {
List<Model> result = Downloader.getModelsByName(getArguments().getString("trade"));
modelListAdapter.setData(result);
return true;
} catch (Exception ex) {
return false;
}
}
#Override
protected void onPostExecute(final Boolean success) {
if (!success) {
// Show error
} else {
// Update list
modelListAdapter.notifyDataSetChanged();
}
}
}.execute();
}
}
and the modelListAdapter set row where one row inculde 2 image and some textview.
And the problem:
when i swiping on the viewpager it isn't smooth :( a loged it and when created the next or previous page (depends on swipe direction) the animation will be bad, is lagging.
What is the solution?
(SGS4 android 4.2.2 - where is the project butter :(( )