Develop Reference

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

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

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

Refresh list inside fragments, inside a ViewTab, pressing a button tha'ts in the adapter

As you can see from the title I'm a little confused on how to resolve my problem. I have an activity that use Tabs to switch between two fragments that contain one list eache one. The list have the same adapter, and in every list there's a button that refresh the two lists.
Here's my MainActivity.class:
public class MainActivity extends AppCompatActivity {
private SectionsPagerAdapter mSectionsPagerAdapter;
public static TreeSet<Task> tasksTODO = new TreeSet<>();
public static TreeSet<Task> tasksDONE = new TreeSet<>();
private TabLayout tabs;
private ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mViewPager = findViewById(R.id.container);
tabs = findViewById(R.id.tabs);
tabs.setupWithViewPager(mViewPager);
tabs.setSelectedTabIndicatorColor(Color.parseColor("#FFFFFF"));
addTasks();
}
#Override
protected void onResume() {
super.onResume();
addTasks();
}
private void setupViewPager(ViewPager vp) {
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
mSectionsPagerAdapter.addFragment(new ShowTodoTasks(), "todo");
mSectionsPagerAdapter.addFragment(new ShowDoneTasks(), "done");
vp.setAdapter(mSectionsPagerAdapter);
}
public void addTasks() {
tasksDONE.add(new Task("Number 1", "pepin", "", "Description 1", 1));
tasksDONE.add(new Task("Number 2", "pepin", "", "Description 2", 1));
tasksDONE.add(new Task("Number 3", "pepin", "", "Description 3", 1));
tasksTODO.add(new Task("Number 4", "pepin", "", "Description 4", 1));
setupViewPager(mViewPager);
}
}
Here's my TaskAdapter:
public class TaskAdapter extends BaseAdapter {
protected Context context;
protected ArrayList<Task> items;
private ImageView edit;
private CheckBox checked;
Task dir;
private TextView title, comment, description, date;
public TaskAdapter(Context context, ArrayList<Task> items) {
this.context = context;
this.items = items;
}
#Override
public int getCount() {
return items.size();
}
#Override
public Object getItem(int position) {
return items.get(position);
}
#Override
public long getItemId(int i) {
return i;
}
#Override
public View getView(final int position, View view, ViewGroup viewGroup) {
LayoutInflater inf = (LayoutInflater) viewGroup.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inf.inflate(R.layout.task_item_template, null);
edit = (ImageView) view.findViewById(R.id.item_edit);
checked = (CheckBox) view.findViewById(R.id.item_done);
final View finalView = view;
dir = items.get(position);
int priority = dir.getPriority();
if (priority == 1) {
view.setBackgroundResource(R.drawable.major_prior_task_border);
}
if (priority == 2) {
view.setBackgroundResource(R.drawable.medium_prior_task_border);
}
if (priority == 3) {
view.setBackgroundResource(R.drawable.minor_prior_task_border);
}
title = view.findViewById(R.id.item_title);
title.setText(dir.getTitle());
comment = view.findViewById(R.id.tv_comment);
comment.setText(dir.getComment());
description = view.findViewById(R.id.item_description);
description.setText(dir.getDescription());
date = view.findViewById(R.id.item_date);
date.setText(dir.getCreationDate());
return view;
}
}
And here are my Fragments:
public class ShowDoneTasks extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_show_done_tasks, container, false);
setup(MainActivity.tasksDONE,v);
return v;
}
#Override
public void onStart() {
super.onStart();
}
private void setup(TreeSet<Task> tasks, View v) {
ListView lv = v.findViewById(R.id.lv_tasks_done);
ArrayList<Task> tareasDone = new ArrayList<>(tasks);
TaskAdapter adapter = new TaskAdapter(v.getContext(), tareasDone);
lv.setAdapter(adapter);
adapter.notifyDataSetChanged();
}
}
And the other one:
public class ShowTodoTasks extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_show_todo_tasks, container, false);
setup(MainActivity.tasksTODO,v);
return v;
}
private void setup(TreeSet<Task> tasks, View v) {
ListView lv = v.findViewById(R.id.lv_tasks_todo);
ArrayList<Task> tareasTodo = new ArrayList<>(tasks);
TaskAdapter adapter = new TaskAdapter(v.getContext(), tareasTodo);
adapter.notifyDataSetChanged();
lv.setAdapter(adapter);
}
}
What I want is this: when you click on the checkBox that's in TaskAdapter i want to refresh the list. I tried using adapter.notifyDataSetChanged() in the fragments but it dosn't seem to work.
Any ideas?

Using ViewPager with fragments

I have a list of images that I display in a ImageListFragment fragment of my MainActivity, clicking on one of those images should open that image as ImageDisplayFragment inside FooPager. I have created a FooPager activity so that when the image the user clicked in ImageListFragment is displayed, the user can then swipe and view all images. The problem I have is that when I click on the image I want to view in ImageListFragment, it displays the very first image in my /drawable directory instead of the actual image I click on. I am not sure what I am doing wrong.
Here is ImageListFragment:
public class ImageListFragment extends Fragment {
private int[] mImageResIds;
private OnGalleryImageSelected mListener;
public static ImageListFragment newInstance() {
return new ImageListFragment();
}
#Override
public void onAttach(Context context) {
super.onAttach(context);
mListener = (OnGalleryImageSelected) context;
final Resources resources = context.getResources();
final TypedArray typedArray = resources.obtainTypedArray(R.array.images);
final int imageCount = 18;
mImageResIds = new int[imageCount];
for (int i = 0; i < imageCount; i++) {
mImageResIds[i] = typedArray.getResourceId(i, 0);
}
typedArray.recycle();
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
final View view = inflater.inflate(R.layout.fragment_image_list, container, false);
final Activity activity = getActivity();
final RecyclerView recyclerView = (RecyclerView) view.findViewById(R.id.recycler_view);
recyclerView.setLayoutManager(new LinearLayoutManager(activity));
recyclerView.setAdapter(new GalleryImageAdapter(activity));
return view;
}
class GalleryImageAdapter extends RecyclerView.Adapter<ViewHolder> {
private LayoutInflater mLayoutInflater;
public GalleryImageAdapter(Context context) {
mLayoutInflater = LayoutInflater.from(context);
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
return new ViewHolder(mLayoutInflater
.inflate(R.layout.recycler_view, viewGroup, false));
}
#Override
public void onBindViewHolder(ViewHolder viewHolder, final int position) {
final int imageResId = mImageResIds[position];
viewHolder.setData(imageResId);
viewHolder.itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
System.out.println(imageResId);
Intent intent = FooPager.newIntent(getActivity(),imageResId);
startActivity (intent);
// mListener.OnGalleryImageSelected(imageResId);
}
});
}
#Override
public int getItemCount() {
return mImageResIds.length;
}
}
class ViewHolder extends RecyclerView.ViewHolder {
private ImageView mImageView;
private ViewHolder(View itemView) {
super(itemView);
mImageView = (ImageView) itemView.findViewById(R.id.gallery_image);
}
private void setData(int imageResId) {
mImageView.setImageResource(imageResId);
}
}
public interface OnGalleryImageSelected {
void OnGalleryImageSelected(int imageResId);
}
}
This is what my pager activity looks like:
public class FooPager extends FragmentActivity{
public static final String EXTRA_IMAGE_ID = "meow";
private ViewPager mViewPager;
private Integer images [] = {
R.drawable.a, R.drawable.b,R.drawable.c,R.drawable.d,R.drawable.e,
R.drawable.f, R.drawable.g, R.drawable.h,R.drawable.i,R.drawable.j,
R.drawable.k, R.drawable.l, R.drawable.m,R.drawable.n,R.drawable.o,
R.drawable.p, R.drawable.q, R.drawable.r
};
public static Intent newIntent(Context packageContext, int id) {
Intent intent = new Intent(packageContext,FooPager.class);
intent.putExtra(EXTRA_IMAGE_ID,id);
return intent;
}
#Override
protected void onCreate (Bundle savedInstanceState) {
super.onCreate (savedInstanceState);
setContentView(R.layout.activity_image_pager);
mViewPager = (ViewPager) findViewById (R.id.activity_image_pager_view_pager);
FragmentManager fragmentManager = getSupportFragmentManager ();
mViewPager.setAdapter(new FragmentStatePagerAdapter(fragmentManager) {
#Override
public Fragment getItem(int position) {
System.out.println(images[position]);
int id = images[position];
return ImageDetailFragment.newInstance(id);
}
#Override
public int getCount() {
return images.length;
}
});
for (int i=0; i < images.length; i++) {
mViewPager.setCurrentItem(i);
break;
}
}
}
And then ImageDetailFragmentfragment:
public class ImageDetailFragment extends Fragment {
private static final String IMAGE_ID = "imageResId";
public static ImageDetailFragment newInstance(int imageResId) {
final Bundle args = new Bundle();
args.putInt(IMAGE_ID, imageResId);
final ImageDetailFragment fragment = new ImageDetailFragment();
fragment.setArguments(args);
return fragment;
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
final View view = inflater.inflate(R.layout.fragment_image_details, container, false);
final ImageView imageView = (ImageView) view.findViewById(R.id.gallery_image);
final Bundle args = getArguments();
imageView.setImageResource(args.getInt(IMAGE_ID));
return view;
}
}
How do I fix my FooPager activity so that it actually displays the image I clicked on from within ImageListFragment?

it displays the very first image in my /drawable directory instead of
the actual image I click on
In your FooPager Activity, this will show the first item in your viewpager. That the reason why it display the first item (i = 0 and break)
for (int i=0; i < images.length; i++) {
mViewPager.setCurrentItem(i);
break;
}
YOu need to send the position from ImageListFragment to FooPager, not imageResId and set mViewPager.setCurrentItem(position). If you send imageResId, you need to browse in you list images
for (int i=0; i < images.length; i++) {
if(images[i] == imageResId) {
mViewPager.setCurrentItem(i);
break;
}
}

Recycler View - Custom Checkbox: keeping state while scrolling

I've seen quite a few posts about this "issue" with RecyclerView, but I can't manage to fix it.
Every time I scroll, my custom CheckBoxes (starStyle) keep turning on/off.
I've tried to follow other solutions here on Stack, but none seems to do the job for me.
Just to explain the structure of my app, I've a long list (each item has a StarStyle CheckBox): when I click on an item, the app takes me in the Details Page for that item, where I can set the CheckBox, too. I managed to bind the list's checkbox and the one in the detail page, but I still having this annoying problem.
Here my code for the ListFragment:
public class PetrolStationListFragment extends Fragment {
private RecyclerView mPetrolStationRecyclerView;
private PetrolStationAdapter mAdapter;
private int itemPosition;
private int mLastAdapterClickPosition = -1;
private List<Boolean> mCheckState = new ArrayList<>();
public static boolean toBeCreated;
private static final String ARG_POSITION = "position";
// Design pattern to instantiate a new fragment.
public static PetrolStationListFragment newInstance(int position) {
PetrolStationListFragment fragment = new PetrolStationListFragment();
Bundle args = new Bundle();
args.putInt(ARG_POSITION, position);
fragment.setArguments(args);
return fragment;
}
/********************************************************/
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_petrol_station_list, container, false);
mPetrolStationRecyclerView = (RecyclerView) view.findViewById(R.id.petrol_recycler_view);
mPetrolStationRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
updateUI();
return view;
}
#Override
public void onResume() {
super.onResume();
updateUI();
}
private void updateUI() {
PetrolStationDAO petrolStationDAO = PetrolStationDAO.get(getActivity());
List<PetrolStation> petrolStations = petrolStationDAO.getPetrolStations();
if (mAdapter == null || toBeCreated) {
mAdapter = new PetrolStationAdapter(petrolStations);
mPetrolStationRecyclerView.setAdapter(mAdapter);
toBeCreated = false;
} else {
if (mLastAdapterClickPosition < 0) {
mAdapter.setPetrolStations(petrolStations);
mAdapter.notifyDataSetChanged();
} else {
mAdapter.notifyItemChanged(mLastAdapterClickPosition);
mLastAdapterClickPosition = -1;
}
mAdapter.notifyItemChanged(itemPosition);
}
}
private class PetrolStationHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
private PetrolStation mPetrolStation;
private TextView mNameTextView;
private TextView mAddressTextView;
private TextView mDistanceTextView;
private CheckBox mCheckBox;
private int mPosition;
public PetrolStationHolder(View itemView) {
super(itemView);
itemView.setOnClickListener(this);
mNameTextView = (TextView) itemView.findViewById(R.id.list_item_station_name_text_view);
mAddressTextView = (TextView) itemView.findViewById(R.id.list_item_station_address_text_view);
mDistanceTextView = (TextView) itemView.findViewById(R.id.list_item_station_distance_text_view);
mCheckBox = (CheckBox) itemView.findViewById(R.id.checkbox);
}
public void bindPetrolStation(PetrolStation petrolStation, int position) {
mPetrolStation = petrolStation;
mNameTextView.setText(mPetrolStation.getName());
mAddressTextView.setText("Via Verdi, 19/A");
mDistanceTextView.setText("300 meters");
mPosition = position;
//mCheckBox.setChecked(mPetrolStation.isFavourite());
mCheckBox.setChecked(mCheckState.get(mPosition));
Log.d("BIND_POSITION", "position: " + mPosition + " / status: " + mCheckState.get(mPosition));
mCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
boolean boxChecked = mPetrolStation.isFavourite();
Log.d("BOX_CHECKED_POSITION", "boxChecked: " + boxChecked);
if (boxChecked) {
mPetrolStation.setFavourite(false);
} else {
mPetrolStation.setFavourite(true);
}
if (boxChecked) {
mCheckState.set(mPosition, false);
} else {
mCheckState.set(mPosition, true);
}
Log.d("CHECK_POSITION", "mCheckState: " + mCheckState);
// TODO: DB connection.
// PetrolStationDAO.get(getActivity()).updateItem(mCrime);
}
});
}
#Override
public void onClick(View v) {
itemPosition = mPetrolStationRecyclerView.getChildAdapterPosition(v);
Intent intent = PetrolStationPagerActivity.newIntent(getActivity(), mPetrolStation.getId());
startActivity(intent);
}
}
private class PetrolStationAdapter extends RecyclerView.Adapter<PetrolStationHolder> {
private List<PetrolStation> mPetrolStations;
public PetrolStationAdapter(List<PetrolStation> petrolStations) {
mPetrolStations = petrolStations;
for (int i = 0; i < mPetrolStations.size(); i++) {
mCheckState.add(false);
}
}
#Override
public PetrolStationHolder onCreateViewHolder(ViewGroup parent, int viewType) {
LayoutInflater layoutInflater = LayoutInflater.from(getActivity());
View view = layoutInflater.inflate(R.layout.list_item_petrol_station, parent, false);
return new PetrolStationHolder(view);
}
#Override
public void onBindViewHolder(PetrolStationHolder holder, int position) {
PetrolStation petrolStation = mPetrolStations.get(position);
holder.bindPetrolStation(petrolStation, position);
// holder.setIsRecyclable(false);
}
#Override
public int getItemCount() {
return mPetrolStations.size();
}
public void setPetrolStations(List<PetrolStation> petrolStations) {
mPetrolStations = petrolStations;
}
}
}
Here the one for the DetailsFragment:
public class PetrolStationFragment extends Fragment {
private static final String ARG_PETROL_STATION_ID = "petrol_station_id";
private PetrolStation mPetrolStation;
private TextView mInfo;
private CheckBox mCheckBox;
private static TabLayout mTabLayout;
private static ViewPager mViewPager;
private static int intItems = 2;
// Navigation Tab constants.
private static final int SELF_SERVICE_POSITION = 0;
private static final int FULL_SERVICE_POSITION = 1;
// Design pattern to instantiate a new fragment.
public static PetrolStationFragment newInstance(long petrolStationId) {
Bundle args = new Bundle();
args.putLong(ARG_PETROL_STATION_ID, petrolStationId);
PetrolStationFragment fragment = new PetrolStationFragment();
fragment.setArguments(args);
return fragment;
}
/********************************************************/
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
long mId = getArguments().getLong(ARG_PETROL_STATION_ID);
mPetrolStation = PetrolStationDAO.get(getActivity()).getPetrolStation(mId);
}
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceStace) {
View view = inflater.inflate(R.layout.fragment_petrol_station, container, false);
mInfo = (TextView) view.findViewById(R.id.petrol_station);
mCheckBox = (CheckBox) view.findViewById(R.id.checkbox);
mInfo.setText(mPetrolStation.getName());
mCheckBox.setChecked(mPetrolStation.isFavourite());
// TODO: to fix.
mCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton compoundButton, boolean isFavourite) {
mPetrolStation.setFavourite(isFavourite);
}
});
// Setup Views.
mTabLayout = (TabLayout) view.findViewById(R.id.pager_header);
mViewPager = (ViewPager) view.findViewById(R.id.pager);
// Set an Adapter for the View Pager.
TabPagerAdapter tabPagerAdapter = new TabPagerAdapter(getChildFragmentManager());
mViewPager.setAdapter(tabPagerAdapter);
mTabLayout.setupWithViewPager(mViewPager);
mViewPager.setCurrentItem(SELF_SERVICE_POSITION);
mTabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
int flag;
#Override
public void onTabSelected(TabLayout.Tab tab) {
mViewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(TabLayout.Tab tab) {
}
#Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
mInfo.addTextChangedListener(new TextWatcher() {
#Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
#Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
mPetrolStation.setName(charSequence.toString());
}
#Override
public void afterTextChanged(Editable editable) {
}
});
return view;
}
class TabPagerAdapter extends FragmentPagerAdapter {
public TabPagerAdapter(FragmentManager fm) {
super(fm);
}
// Return fragment with respect to position.
#Override
public Fragment getItem(int position) {
Fragment fragment;
switch (position) {
case SELF_SERVICE_POSITION: {
fragment = SelfServiceFragment.newInstance();
return fragment;
}
case FULL_SERVICE_POSITION: {
fragment = FullServiceFragment.newInstance();
return fragment;
}
}
return null;
}
#Override
public int getCount() {
return intItems;
}
// This method returns the title of the tab according to its position.
#Override
public CharSequence getPageTitle(int position) {
switch (position) {
case SELF_SERVICE_POSITION: {
String mSelfService = getResources().getString(R.string.self_service);
return mSelfService;
}
case FULL_SERVICE_POSITION: {
String mFullService = getResources().getString(R.string.full_service);
return mFullService;
}
}
return null;
}
}
}
Any hints about how to solve this issue?
Am I missing some kind of check?

Use a List of boolean type to hold the state of the checkbox. By default fill your collection with a false value.
When you select a checkbox change the state of the map using the set method
As you know When you scroll there will be a call to your adapter there you read the value from the map using get and set it to checkbox
List < Boolean > checkstate = new ArrayList < Boolean > ();
// Inside the adapter constructor
for (i = 0; i < itemSize; i++) {
checkstate.add(false);
}
Inside your Viewholder add below Line what it does is whatever the updated value of checkbox will set to your checkbox. Initially all the Items will be false
yourCheckbox.setChecked(checkstate.get(position));
Now inside onCheckedChanged Listener
if (boxchecked) {
checkstate.set(position, true);
} else {
checkstate.set(position, false);
}

Android - Sending data from fragment to fragment using swipeview

Could be this is a dupe, but I've been looking for solutions and they always slightly differ from my problem.
So:
I'm currently creating an app that has 2 fragments that are swipeable. TaskGroupFragment shows a list and when you click on an item it wil slide to TasksFragment and show you a sublist. What I have to do now is send the id of the selected item from groups to tasks so I can get the sublist out of SQLite.
I know I'm supposed to communicate through the connected MainActivity and I'm already at the point that I've created an interface in TaskGroupsFragment and implemented this in the activity. Tried and tested and the activity receives the TaskGroupID.
The part where I'm stuck is getting this info in TasksFragment. Especially using swipeview makes this harder.
My code:
MainPagerAdapter:
public class MainPagerAdapter extends FragmentStatePagerAdapter {
public MainPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int i) {
switch (i) {
case 0: return TaskGroupFragment.newInstance();
case 1: return TasksFragment.newInstance();
default: return TaskGroupFragment.newInstance();
}
}
#Override
public int getCount() {
return 2;
}
}
TaskGroupActivity (sending fragment):
public class TaskGroupFragment extends ListFragment {
private DoItDataSource dataSource;
private List<TaskGroups> groups;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_task_group, container, false);
dataSource = new DoItDataSource(getActivity());
dataSource.open();
JSONContainer jsonContainer = dataSource.sqliteToContainer();
dataSource.close();
groups = jsonContainer.getTask_groups();
TaskGroupAdapter adapter = new TaskGroupAdapter(getActivity(), groups);
setListAdapter(adapter);
return view;
}
public static TaskGroupFragment newInstance() {
TaskGroupFragment tgf = new TaskGroupFragment();
return tgf;
}
public interface OnTaskGroupSelectedListener {
public void onTaskGroupSelected(String taskGroupId);
}
OnTaskGroupSelectedListener mListener;
#Override
public void onAttach(Activity activity) {
super.onAttach(activity);
try {
mListener = (OnTaskGroupSelectedListener) activity;
} catch (ClassCastException e) {
throw new ClassCastException(activity.toString()
+ " Interface not implemented in activity");
}
}
#Override
public void onListItemClick(ListView l, View v, int position, long id) {
((MainActivity)getActivity()).setCurrentItem(1, true);
mListener.onTaskGroupSelected(groups.get(position).getId());
}
}
MainActivity:
public class MainActivity extends FragmentActivity implements
TaskGroupFragment.OnTaskGroupSelectedListener{
private SharedPreferences savedValues;
private DoItDataSource dataSource = new DoItDataSource(this);
private String identifier, user, domain;
private JSONContainer containerToday;
private JSONContainer containerTomorrow;
public ViewPager pager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
savedValues = getSharedPreferences("SavedValues", MODE_PRIVATE);
identifier = savedValues.getString("Identifier", "");
pager = (ViewPager) findViewById(R.id.activity_main_pager);
pager.setAdapter(new MainPagerAdapter(getSupportFragmentManager()));
if (identifier == null || identifier.equals("")) {
Intent intent = new Intent(MainActivity.this, LoginActivity.class);
intent.putExtra("APP_ID", APP_ID);
startActivity(intent);
}
}
#Override
protected void onResume() {
super.onResume();
identifier = savedValues.getString("Identifier", "");
user = savedValues.getString("User", "");
domain = savedValues.getString("Domain", "");
boolean onBackPressed = savedValues.getBoolean("OnBackPressed", false);
//
// getting lists
//
}
private void resultHandling(String json, String day) {
if (day.equals("today")) {
Gson gson = new Gson();
containerToday = gson.fromJson(json, JSONContainer.class);
jsonToSQLite(containerToday, "Today");
} else if (day.equals("tomorrow")) {
Gson gson = new Gson();
containerTomorrow= gson.fromJson(json, JSONContainer.class);
jsonToSQLite(containerTomorrow, "Tomorrow");
}
}
String taskGroupId = "";
#Override
public void onTaskGroupSelected(String taskGroupId) {
this.taskGroupId = taskGroupId;
// Enter missing link here?
}
}
TaskFragment (receiving fragment):
public class TasksFragment extends ListFragment
implements OnClickListener {
private final static String TAG = "TaskItemFragment logging";
private DoItDataSource dataSource;
private List<Tasks> tasks;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_task_item, container, false);
Button backButton = (Button)
view.findViewById(R.id.fragment_task_item_bar_back_button);
dataSource = new DoItDataSource(getActivity());
dataSource.open();
tasks = dataSource.getTasks("204"); // 204 is a placeholder, TaskGroupId should be here
dataSource.close();
TasksAdapter adapter = new TasksAdapter(getActivity(), tasks);
setListAdapter(adapter);
backButton.setOnClickListener(this);
return view;
}
public static TasksFragment newInstance() {
TasksFragment tif = new TasksFragment();
return tif;
}
#Override
public void onListItemClick(ListView l, View v, int position, long id) {
Toast.makeText(getActivity(), "Clicked item " + position, Toast.LENGTH_LONG).show();
}
#Override
public void onClick(View v) {
switch(v.getId()) {
case R.id.fragment_task_item_bar_back_button:
((MainActivity)getActivity()).setCurrentItem(0, true);
break;
}
}
}
Solution
Thanks to Alireza! I had to make several changes to his proposed code, but in the end it helped me in finding the solution!
MainPageAdapter:
public class MainPagerAdapter extends FragmentStatePagerAdapter {
// ADDED
private String taskGroupId;
public MainPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int i) {
switch (i) {
case 0: return TaskGroupFragment.newInstance();
// MODIFIED
case 1:
Bundle args = new Bundle();
logcat("before setBundle " + taskGroupId);
args.putString("taskGroupId",taskGroupId);
Fragment fragment = new TasksFragment();
fragment.setArguments(args);
return fragment;
default: return TaskGroupFragment.newInstance();
}
}
// ADDED
public void setTaskGroupId(String id){
this.taskGroupId = id;
}
#Override
public int getCount() {
return 2;
}
}
MainActivity:
public class MainActivity extends FragmentActivity implements
TaskGroupFragment.OnTaskGroupSelectedListener{
private SharedPreferences savedValues;
private DoItDataSource dataSource = new DoItDataSource(this);
private String identifier, user, domain;
private JSONContainer containerToday;
private JSONContainer containerTomorrow;
// ADDED
private MainPagerAdapter adapter;
public ViewPager pager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
savedValues = getSharedPreferences("SavedValues", MODE_PRIVATE);
identifier = savedValues.getString("Identifier", "");
// ADDED
adapter = new MainPagerAdapter(getSupportFragmentManager());
pager = (ViewPager) findViewById(R.id.activity_main_pager);
// MODIFIED
pager.setAdapter(adapter);
if (identifier == null || identifier.equals("")) {
Intent intent = new Intent(MainActivity.this, LoginActivity.class);
intent.putExtra("APP_ID", APP_ID);
startActivity(intent);
}
}
#Override
protected void onResume() {
super.onResume();
identifier = savedValues.getString("Identifier", "");
user = savedValues.getString("User", "");
domain = savedValues.getString("Domain", "");
boolean onBackPressed = savedValues.getBoolean("OnBackPressed", false);
//
// Getting lists
//
}
String taskGroupId = "";
#Override
public void onTaskGroupSelected(String taskGroupId) {
this.taskGroupId = taskGroupId;
// ADDED
adapter.setTaskGroupId(taskGroupId);
pager.setAdapter(adapter);
pager.setCurrentItem(1);
}
}
TaskFragment (receiving fragment):
public class TasksFragment extends ListFragment implements OnClickListener {
private final static String TAG = "TaskItemFragment logging";
private DoItDataSource dataSource;
private List<Tasks> tasks;
private String taskGroupId;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_task_item, container, false);
Button backButton = (Button) view.findViewById(R.id.fragment_task_item_bar_back_button);
dataSource = new DoItDataSource(getActivity());
// ADDED
Bundle bundle = getArguments();
taskGroupId = bundle.getString("taskGroupId");
// MODIFIED
dataSource.open();
tasks = dataSource.getTasks(taskGroupId);
dataSource.close();
TasksAdapter adapter = new TasksAdapter(getActivity(), tasks);
setListAdapter(adapter);
backButton.setOnClickListener(this);
return view;
}
// CAN BE REMOVED?
//public static TasksFragment newInstance() {
// TasksFragment tif = new TasksFragment();
// return tif;
//}
#Override
public void onListItemClick(ListView l, View v, int position, long id) {
Toast.makeText(getActivity(), "Clicked item " + position, Toast.LENGTH_LONG).show();
}
#Override
public void onClick(View v) {
switch(v.getId()) {
case R.id.fragment_task_item_bar_back_button:
((MainActivity)getActivity()).setCurrentItem(0, true);
break;
}
}
}
Please note that I'm using taskGroupId as a String, not an int.

First you need to make sure your adapter knows about taskGroupID. just add a variable and a public method to your adapter.
public class MainPagerAdapter extends FragmentStatePagerAdapter {
private int taskGroupId;
public void setTaskGroupId(int id){
this.taskGroupId = id;
}
}
then store a reference to your adapter in your activity. Now simply call this method whenever GroupId changes
#Override
public void onTaskGroupSelected(String taskGroupId) {
this.taskGroupId = taskGroupId;
adapter.setTastGroupId = taskGroupId; //data needed to initialize fragment.
adapter.setCurrentItem(1); //going to TasksFragment page
}
then you need to put some argumants before starting your fragment.
#Override
public Fragment getItem(int i) {
//this code is only for case 1:
Bundle args = new Bundle();
args.putInt("taskGroupId",taskGroupId);
Fragment fragment = new TasksFragment();
fragment.setArguments(args);
return fragment;
}
and lastly use this data in your TaskFragment to show the right content.