Develop Reference

Must implement OnFragmentInteractionListener()

I know I am not the first person to rise this question here but unfortunately,As I mentioned in my title ,I got the error when I run the app .But I have imported import android.support.v4.app.Fragment; in my fragments .
From the parent fragment I have a cardview when I clicked on it I need to call another fragment to show the views related to the clicked cardview .
And I have tried lot of solution for the same problem posted in stackoverflow.But nothing is worked for me .
Reminders.java
public class Reminders extends Fragment {
private OnFragmentInteractionListener mListener;
List<reminder> lstreminder;
public Reminders() {
}
public static Reminders newInstance(String param1, String param2) {
Reminders fragment = new Reminders();
Bundle args = new Bundle();
fragment.setArguments(args);
return fragment;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final View rootView = inflater.inflate(R.layout.fragment_reminders, container, false);
lstreminder = new ArrayList<>();
lstreminder.add(new reminder("Alarm",R.drawable.alarms));
lstreminder.add(new reminder("Birthday",R.drawable.birthdays));
lstreminder.add(new reminder("Anniversary",R.drawable.anniversaries));
lstreminder.add(new reminder("Buy Gifts",R.drawable.buygift));
lstreminder.add(new reminder("Bill Payments",R.drawable.billpayments));
lstreminder.add(new reminder("Call / SMS",R.drawable.call));
lstreminder.add(new reminder("Recharges",R.drawable.recharges));
lstreminder.add(new reminder("Meetings",R.drawable.meetings));
lstreminder.add(new reminder("Insurance",R.drawable.insurances));
lstreminder.add(new reminder("Exams",R.drawable.exams));
lstreminder.add(new reminder("Holidays",R.drawable.holidays));
lstreminder.add(new reminder("Medical",R.drawable.medical));
lstreminder.add(new reminder("Purchase",R.drawable.purchase));
lstreminder.add(new reminder("Travel",R.drawable.travel));
lstreminder.add(new reminder("Shows",R.drawable.shows));
RecyclerView recyclerView = (RecyclerView) rootView.findViewById(R.id.mRecyclerView_id);
final RecyclerviewAdapter recyclerviewAdapter = new RecyclerviewAdapter(getActivity(),lstreminder);
recyclerView.setLayoutManager(new GridLayoutManager(getActivity(),3));
recyclerView.setAdapter(recyclerviewAdapter);
recyclerviewAdapter.setOnItemClickListner(new RecyclerviewAdapter.onItemClickListner() {
#Override
public void onClick(reminder str) {
if(str.getmTitle().equals("Alarm")){
Fragment fragment = new Alarm();
getFragmentManager().beginTransaction()
.replace(R.id.fragmrnt_alarm, fragment, fragment.getClass().getSimpleName()).addToBackStack(null).commit();
}
recyclerviewAdapter.notifyDataSetChanged();
}
});
return rootView;
}
public void onButtonPressed(Uri uri) {
if (mListener != null) {
mListener.onFragmentInteraction(uri);
}
}
#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(Uri uri);
}
}
Alarm.java
public class Alarm extends Fragment {
private OnFragmentInteractionListener mListener;
public Alarm() {
}
public static Alarm newInstance(String param1, String param2) {
Alarm fragment = new Alarm();
Bundle args = new Bundle();
fragment.setArguments(args);
return fragment;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_alarm, container, false);
}
public void onButtonPressed(Uri uri) {
if (mListener != null) {
mListener.onFragmentInteraction(uri);
}
}
#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(Uri uri);
}
}

You need to make the parent activity implement OnFragmentInteractionListener and override the methods provided by that interface.
class MyActivity implements OnFragmentInteractionListener
This is where your code is crashing, your activity probably does not implement the metioned interface and because of that the crash happens when the fragment is attached:
#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");
}
}

OnCickListener not working on EditText

On click listener not working on edit text in android
<EditText
android:id="#+id/state_search_UPFET"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="15sp"
android:clickable="true"
android:cursorVisible="false"
android:focusable="false"
android:focusableInTouchMode="false"
android:layout_below="#id/textView1"
android:hint="#string/hintState"
android:inputType="none"
android:padding="12sp" />

public class DoctorSearchFragment extends BaseFragment implements AbstractView, View.OnClickListener {
// TODO: Rename parameter arguments, choose names that match
private EditText SEARCH_STATE, SEARCH_CITY, DEPARTMENT;
private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";
public static DoctorSearchFragment doctorSearchFragment;
// TODO: Rename and change types of parameters
private String mParam1;
private String mParam2;
private OnFragmentInteractionListener mListener;
private Button getDoctorButton;
public DoctorSearchFragment() {
// Required empty public constructor
}
// TODO: Rename and change types and number of parameters
public static DoctorSearchFragment newInstance(String param1, String param2) {
DoctorSearchFragment fragment = new DoctorSearchFragment();
Bundle args = new Bundle();
args.putString(ARG_PARAM1, param1);
args.putString(ARG_PARAM2, param2);
fragment.setArguments(args);
return fragment;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
doctorSearchFragment=this;
setHasOptionsMenu(false);
if (getArguments() != null) {
mParam1 = getArguments().getString(ARG_PARAM1);
mParam2 = getArguments().getString(ARG_PARAM2);
}
AppController.getInstance().getMainActivity().getSupportActionBar().setTitle(getString(R.string.search_doctor_by));
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_book_appointment, container, false);
initializeComponents(view);
return view;
}
private void initializeComponents(View view) {
SEARCH_CITY = (EditText) view.findViewById(R.id.city_search_UPFET);
SEARCH_STATE = (EditText) view.findViewById(R.id.state_search_UPFET);
DEPARTMENT = (EditText) view.findViewById(R.id.dept_search_UPFET);
getDoctorButton = (Button) view.findViewById(R.id.getDoctor) ;
SEARCH_STATE.setOnClickListener(this);
SEARCH_CITY.setOnClickListener(this);
DEPARTMENT.setOnClickListener(this);
getDoctorButton.setOnClickListener(this);
//progressBar.setVisibility(View.VISIBLE);
}
#Override
public void onClick(View view) {
int id = view.getId();
switch (id) {
case R.id.state_search_UPFET:
SEARCH_STATE.setError(null);
SEARCH_STATE.setText("");
StateListDialog stateListDialog = new StateListDialog();
stateListDialog.setAppCompatActivity((AppCompatActivity) getActivity());
stateListDialog.loadData();
break;
case R.id.city_search_UPFET:
SEARCH_CITY.setError(null);
SEARCH_CITY.setText("");
CityListDialog cityListDialog = new CityListDialog();
cityListDialog.setAppCompatActivity((AppCompatActivity) getActivity());
cityListDialog.loadData(SEARCH_STATE.getText().toString());
break;
case R.id.getDoctor:
AppController.getInstance().handleEvent(AppDefines.EVENT_ID_DOCTORSLIST);
break;
}
}
public void setState(String state) {
Log.d("TAG", "FRAGMENT STATE " + state + " IS STATE NULL " + (SEARCH_STATE == null));
if (SEARCH_STATE != null) SEARCH_STATE.setText(state);
if (SEARCH_CITY != null) SEARCH_CITY.setText("");
}
public void setCity(String city) {
Log.d("TAG", "FRAGMENT STATE " + city + " IS STATE NULL " + (SEARCH_CITY == null));
if (SEARCH_CITY != null) SEARCH_CITY.setText(city);
}
// TODO: Rename method, update argument and hook method into UI event
public void onButtonPressed(Uri uri) {
if (mListener != null) {
mListener.onFragmentInteraction(uri);
}
}
#Override
public void onAttach(Context context) {
super.onAttach(context);
if (context instanceof OnFragmentInteractionListener) {
mListener = (OnFragmentInteractionListener) context;
}
}
#Override
public void onDetach() {
super.onDetach();
mListener = null;
}
#Override
public void update() {
}
#Override
public void onFragmentResume() {
AppController.getInstance().getMainActivity().getSupportActionBar().setTitle(getString(R.string.search_doctor_by));
}
public interface OnFragmentInteractionListener {
// TODO: Update argument type and name
void onFragmentInteraction(Uri uri);
}
public static DoctorSearchFragment getInstance() {
return doctorSearchFragment;
}
}

android adding fragment programatically doesn't accept parameter

I am trying to add a fragment programatically to my layout in the MainActivity, to be more specific in its onCreate method. I keep getting an error Cannot resolve method add(), and that really shouldnt happen because I've copied the code from the official site. Somebody please help. Here is the code:
FragmentManager fragmentManager = getFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
FooterVertical fragment = new FooterVertical();
fragmentTransaction.add(R.id.activity_main, fragment);
fragmentTransaction.commit();
public class FooterVertical extends Fragment {
// TODO: Rename parameter arguments, choose names that match
// the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";
// TODO: Rename and change types of parameters
private String mParam1;
private String mParam2;
private OnFragmentInteractionListener mListener;
public FooterVertical() {
// Required empty public constructor
}
public static FooterVertical newInstance(String param1, String param2) {
FooterVertical fragment = new FooterVertical();
Bundle args = new Bundle();
args.putString(ARG_PARAM1, param1);
args.putString(ARG_PARAM2, param2);
fragment.setArguments(args);
return fragment;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
mParam1 = getArguments().getString(ARG_PARAM1);
mParam2 = getArguments().getString(ARG_PARAM2);
}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_footer_vertical, container, false);
return v;
}
// TODO: Rename method, update argument and hook method into UI event
public void onButtonPressed(Uri uri) {
if (mListener != null) {
mListener.onFragmentInteraction(uri);
}
}
#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 {
// TODO: Update argument type and name
void onFragmentInteraction(Uri uri);
}
}

If you are importing android.app.Fragment; change it to android.support.v4.app.Fragment;

I use this:
FragmentManager fm = getFragmentManager();
fm.beginTransaction().replace(R.id.content_frame, new HomeFragment()).commit();

Android Studio Shared Preferences

Thanks a lot for looking here, I'm working on an app for school and I've run into another problem. The main idea of the app is to track your calories and I would like it to save the calories so when the app is closed it will still remember them. I've been busy for a while now trying it with SavedPreferences but I keep getting errors. I was hoping someone could help me with this.
public class CaloriesEaten extends Fragment {
private Context mContext;
private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";
private static EditText caleaten;
private static EditText calalready;
private static TextView caltotal;
private static Button btnClick;
private EditText editText;
//private String calalreadystring = calalready.getText().toString();
//int CalCount = Integer.parseInt(calalreadystring);
Context context = getActivity();
SharedPreferences pref = context.getSharedPreferences("MyCalories", Context.MODE_PRIVATE);
// TODO: Rename and change types of parameters
private String mParam1;
private String mParam2;
private OnFragmentInteractionListener mListener;
public CaloriesEaten() {
// Required empty public constructor
}
public static CaloriesEaten newInstance(String param1, String param2) {
CaloriesEaten fragment = new CaloriesEaten();
Bundle args = new Bundle();
args.putString(ARG_PARAM1, param1);
args.putString(ARG_PARAM2, param2);
fragment.setArguments(args);
return fragment;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
mParam1 = getArguments().getString(ARG_PARAM1);
mParam2 = getArguments().getString(ARG_PARAM2);
}
String keki = pref.getString("CalorieCounter", "");
editText.setText(keki);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_calories_eaten,
container, false);
caleaten = (EditText) view.findViewById(R.id.CalorieInput);
calalready = (EditText) view.findViewById(R.id.Cals);
caltotal = (TextView) view.findViewById(R.id.CalNumber);
btnClick = (Button)view.findViewById(R.id.addcalories);
btnClick.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
buttonClicked(v);
}
});
return view;
}
public void buttonClicked (View view) {
int x = Integer.parseInt(caleaten.getText().toString());
int y = Integer.parseInt(calalready.getText().toString());
int total = x + y;
caltotal.setText(Integer.toString(total));
calalready.setText(Integer.toString(total));
caleaten.setText("");
SharedPreferences.Editor edit = pref.edit();
String calalreadystring = calalready.getText().toString();
int CalCount = Integer.parseInt(calalreadystring);
edit.putInt("CalorieCounter", CalCount);
edit.commit();
}
public void onButtonPressed(Uri uri) {
if (mListener != null) {
mListener.onFragmentInteraction(uri);
}
}
#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 {
// TODO: Update argument type and name
void onFragmentInteraction(Uri uri);
}
}
I'm probably doing a lot of obvious dumb stuff but I really can't figure it out.
Thanks a lot!

declare SharedPreferences globally and initialize inside onCreateView methode,
eg:
Context context;
SharedPreferences pref;
.......
...
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_calories_eaten,
container, false);
context = getActivity();
pref = context.getSharedPreferences("MyCalories", Context.MODE_PRIVATE);
.............
....
}

Buttons with fragments

I am working on an app for my school project in android studio that works with a navigation drawer and multiple fragments, I have got all the fragments setup and working but now I am stuck. I have no clue how to make working buttons in fragments.
Fragments activity
public class CaloriesEaten extends Fragment {
private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";
private static EditText caleaten;
private static EditText calalready;
private static TextView caltotal;
private static Button btnadd;
// TODO: Rename and change types of parameters
private String mParam1;
private String mParam2;
private OnFragmentInteractionListener mListener;
public CaloriesEaten() {
// Required empty public constructor
}
public static CaloriesEaten newInstance(String param1, String param2) {
CaloriesEaten fragment = new CaloriesEaten();
Bundle args = new Bundle();
args.putString(ARG_PARAM1, param1);
args.putString(ARG_PARAM2, param2);
fragment.setArguments(args);
return fragment;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
mParam1 = getArguments().getString(ARG_PARAM1);
mParam2 = getArguments().getString(ARG_PARAM2);
}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_calories_eaten,
container, false);
caleaten = (EditText) view.findViewById(R.id.CalorieInput);
calalready = (EditText) view.findViewById(R.id.Cals);
caltotal = (TextView) view.findViewById(R.id.CalNumber);
btnadd = (Button) view.findViewById(R.id.addcalories);
// Inflate the layout for this fragment
btnadd.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
buttonClicked(v);
}
});
return inflater.inflate(R.layout.fragment_calories_eaten, container, false);
}
public void buttonClicked (View view) {
int x = Integer.parseInt(caleaten.getText().toString());
int y = Integer.parseInt(calalready.getText().toString());
int total = x + y;
caltotal.setText(Integer.toString(total));
}
public void onButtonPressed(Uri uri) {
if (mListener != null) {
mListener.onFragmentInteraction(uri);
}
}
#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 {
// TODO: Update argument type and name
void onFragmentInteraction(Uri uri);
}
}
This is my first time asking a question here so if i'm missing anything please let me know.
Thanks!

View override by inflating at end of onCreateView() method
Replace
return inflater.inflate(R.layout.fragment_calories_eaten, container, false);
to
return view;
in onCreateView() method

Funny reason: You are inflating a View, using it to get it's children and finally returning different inflated view instance. You should return the same instance you are inflating initially and using to get it's children.
Just change
return inflater.inflate(R.layout.fragment_calories_eaten, container, false);
to
return view;
in onCreateView() method

Replace
return inflater.inflate(R.layout.fragment_calories_eaten, container, false);
to
view = inflater.inflate(R.layout.fragment_calories_eaten, container, false);
return view;
Now using this view instance you can find you other views inflating on it as button.
btnClickMe = (Button)view.findViewById(R.id.btn);
use above code in onCreateView method before returning view.