Android - Ondatechangedlistener - How to Set This

Android - OnDateChangedListener - how do you set this?

Once you've created your DatePicker, you need to initialize it with the date you want to display at first. That's the point at which you can add your listener.

See DatePicker.init(int, int, int, OnDateChangedListener).

Update

26 API allows to set listener: DatePicker.setOnDateChangedListener()

DatePicker.OnDateChangedListener called twice

When I test my application, method onDateSet called twice after accept the date selection and once when I canceled.

I added a validation in the method onDateSet with parameter view, something like this

@Override
public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth){
    if (view.isShown()) {
        updateDate(year, monthOfYear, dayOfMonth);
    }
}

What is android Date changed Listener Event?

You could refer to this :

Android - OnDateChangedListener - how do you set this?

Android DatePicker question

http://developer.android.com/reference/android/widget/DatePicker.OnDateChangedListener.html

Android DatePicker how to set listener and selected date to show and set to and from date

The key word you are looking for is "Range".
Here a link for an android library that marks that range between dates.

https://github.com/borax12/MaterialDateRangePicker

DatePickerDialog cannot implement OnDateSetListener on MaterialLibrary

From https://github.com/rey5137/material/blob/master/lib/src/main/java/com/rey/material/widget/DatePicker.java#L430 it looks like the function is called setOnDateChangedListener and you need to implement OnDateChangedListener:

/**
 * Set the listener will be called when the selected date is changed.
 * @param listener The {@link DatePicker.OnDateChangedListener} will be called.
 */
public void setOnDateChangedListener(OnDateChangedListener listener){
    mOnDateChangedListener = listener;
}

and from https://github.com/rey5137/material/blob/master/lib/src/main/java/com/rey/material/widget/DatePicker.java#L72 is the interface to implement:

/**
 * Interface definition for a callback to be invoked when the selected date is changed.
 */
public interface OnDateChangedListener {

    /**
     * Called when the selected date is changed.
     * @param oldDay The day value of old date.
     * @param oldMonth The month value of old date.
     * @param oldYear The year value of old date.
     * @param newDay The day value of new date.
     * @param newMonth The month value of new date.
     * @param newYear The year value of new date.
     */
    public void onDateChanged(int oldDay, int oldMonth, int oldYear, int newDay, int newMonth, int newYear);
}

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