OnDateChanged method not working

Question

This is my first post, and I am trying to create a very simple task manager application, however I am having problems with the (apparently) onDateChanged method. It seems that it does not implement the change, even if the dialog appears normally. There are no errors in the log, and I double-checked various solutions with similar functions, but I could not find something important. (minSDK 16, Target 21)

Thanks a lot in advance, and I'm sorry if this is something obvious.

public class DatePickerFragment extends DialogFragment { public static final String EXTRA_DATE = "thanoschatz.com.annastodolist.date"; private Date mDate; public static DatePickerFragment newInstance(Date mDate) { Bundle args = new Bundle(); args.putSerializable(EXTRA_DATE, mDate); DatePickerFragment fragment = new DatePickerFragment(); fragment.setArguments(args); return fragment; } @Override public Dialog onCreateDialog(Bundle savedInstanceState) { mDate = (Date) getArguments().getSerializable(EXTRA_DATE); Calendar calendar = Calendar.getInstance(); calendar.setTime(mDate); int year = calendar.get(Calendar.YEAR); int month = calendar.get(Calendar.MONTH); int day = calendar.get(Calendar.DAY_OF_MONTH); View v = getActivity().getLayoutInflater().inflate(R.layout.dialog_date, null); DatePicker datePicker = (DatePicker) v.findViewById(R.id.dialog_date_datepicker); datePicker.init(year, month, day, new DatePicker.OnDateChangedListener() { @Override public void onDateChanged(DatePicker view, int year, int monthOfYear, int dayOfMonth) { mDate = new GregorianCalendar(year, monthOfYear, dayOfMonth).getTime(); getArguments().putSerializable(EXTRA_DATE, mDate); } }); return new AlertDialog.Builder(getActivity()) .setView(v) // .setTitle(R.string.date_picker_title) // .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { sendResult(Activity.RESULT_OK); } }) .create(); } private void sendResult(int resultCode) { if (getTargetFragment() == null) return; Intent intent = new Intent(); intent.putExtra(EXTRA_DATE, mDate); getTargetFragment().onActivityResult(getTargetRequestCode(), resultCode, intent); } } 

 public class ToDoFragment extends Fragment { public static final String EXTRA_TODO_ID = "thanoschatz.com.annastodolist.todo_id"; private static final String DIALOG_DATE = "date"; private static final int REQUEST_DATE = 0; private ToDo mToDo; private EditText mTitleField; private Button mDateButton; private CheckBox mDoneCheckBox; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setHasOptionsMenu(true); UUID toDoId = (UUID)getArguments().getSerializable(EXTRA_TODO_ID); mToDo= ToDoLab.get(getActivity()).getToDo(toDoId); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_todo, container, false); wireTitleField(view); wireDateButton(view); wireSolvedCheckBox(view); return view; } @Override public void onActivityResult(int requestCode, int resultCode, Intent intent) { if (resultCode != Activity.RESULT_OK) { return; } if (requestCode == REQUEST_DATE) { Date mDate = (Date)intent.getSerializableExtra(DatePickerFragment.EXTRA_DATE); mToDo.setDate(mDate); } } public ToDoFragment(){ } public static ToDoFragment newInstance(UUID mId) { Bundle args = new Bundle(); args.putSerializable(EXTRA_TODO_ID, mId); ToDoFragment fragment = new ToDoFragment(); fragment.setArguments(args); return fragment; } private void wireDateButton(View view) { SimpleDateFormat dateFormatter = getSimpleDateFormat(); mDateButton = (Button)view.findViewById(R.id.toDo_date); updateDate(dateFormatter); mDateButton.setOnClickListener(new View.OnClickListener() { public void onClick(View view) { FragmentManager fragmentManager = getFragmentManager(); DatePickerFragment datePicker = DatePickerFragment.newInstance(mToDo.getDate()); datePicker.setTargetFragment(ToDoFragment.this, REQUEST_DATE); datePicker.show(fragmentManager, DIALOG_DATE); } }); } } 

Answer 1

There is another way to make it work under 5.0 and support DatePicker in calendar mode. What you can do is set up listening for click changes in the dialog box and update the link for the date. If in any case your window close handler notices that the last button clicked has been undone, just ignore the change ...

 private String dateString; //last date saved. private String clickedDate; //last date clicked on DatePicker private DatePicker datePicker; @Override protected void onDialogClosed(boolean shouldSave) { if (shouldSave && this.clickedDate != null) { updateDate(this.clickedDate); this.clickedDate = null; } } @Override public void onDateChanged(DatePicker view, int year, int month, int day) { Calendar selected = new GregorianCalendar(year, month, day); this.clickedDate = formatter().format(selected.getTime()); } @Override public void onClick(DialogInterface dialog, int which) { super.onClick(dialog, which); datePicker.clearFocus(); onDateChanged(datePicker, datePicker.getYear(), datePicker.getMonth(), datePicker.getDayOfMonth()); onDialogClosed(which == DialogInterface.BUTTON_NEGATIVE); } private void updateDate(String s) { dateString = s; } 

This is where the idea came from https://github.com/bostonandroid/DatePreference/blob/master/DatePreference/src/org/bostonandroid/datepreference/DatePreference.java

Answer 2

You are using an application for Android 5.0, right? I found that in version 5.0 DatePicker will not call the OnDateChanged () method when it is in its CalendarView mode by default, but it will do it if it is Spinners mode. Your code should work if DatePicker appears as spinners.

The only way to get 5.0 DatePicker in Spinners mode to include the following in the xml code that defines DatePicker:

 android:datePickerMode="spinner" 

Lollipop seems to ignore any androids: CalendarViewShown = "false", as well as all calls to DatePicker.setCalendarViewShown (false) in the Java code. The datePickerMode xml directive is only supported in API 21, but any device running at a lower level of the API simply ignores it, so your code will work in older versions of Android. However, keep the CalendarViewShown = "false" directive in your xml code if you want DatePicker to be a spinner on a device prior to 5.0.

Answer 3

Use DatePickerDialog :

 return new DatePickerDialog(getActivity(), this, year, month, day); 

Your class declaration should look like this:

 public class DatePickerFragment extends DialogFragment implements DatePickerDialog.OnDateSetListener { 

You will need to implement the OnDateSet method:

 @Override public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) { mDate = new GregorianCalendar(year, monthOfYear, dayOfMonth).getTime(); getArguments().putSerializable(EXTRA_DATE, mDate); sendResult(Activity.RESULT_OK); } 

Or you can install your theme on Holo.Light, which seems to support DatePicker OnDateChanged events. In the manifest file:

 <application android:label="@string/app_name" android:icon="@drawable/ic_launcher" android:theme="@android:style/Theme.Holo.Light"> 

Or you can lower your minimum API level, this will set the Holo theme by default:

 <uses-sdk android:minSdkVersion="15" /> 

Answer 4

This is my answer that can just solve this question:

 public class MyDatePickerDialog extends DatePickerDialog { public MyDatePickerDialog(Context context, OnDateSetListener callBack, int year, int monthOfYear, int dayOfMonth) { super(context, callBack, year, monthOfYear, dayOfMonth); } @TargetApi(11) @Override public void onClick(DialogInterface dialog, int which) { getDatePicker().clearFocus(); super.onClick(dialog, which); } }