Hope this will help you out :)
I had the same issue and made something like that.
Create new selector in drawable for example calendar_cell_text_color.xml. In this file you put sth like this.
<!-- Caldroid days from prev and next month -->
<item android:color="@color/white" caldroid:state_date_prev_next_month="true"/>
<!-- Caldroid days from current month -->
<item android:color="@color/black" />
Now, you have to change style of CaldroidDefaultCell .
In file style.xml add follows line.
<!-- My Caldroid theme. -->
<style name="MyCaldroid" parent="CaldroidDefault">
<!--If you use compact view in Caldroid -->
<item name="styleCaldroidNormalCell">@style/CaldroidCell</item>
<!-- If you use square (default) view in Caldroid-->
<item name="styleCaldroidSquareCell">@style/CaldroidCell</item>
</style>
<style name="CaldroidCell" parent="CaldroidDefaultCell">
<item name="android:textColor">@drawable/calendar_cell_text_color</item>
</style>
Now you need to add line to use yout theme after you initizalized caldroid.
caldroidFragment = new CaldroidFragment();
caldroidFragment.setThemeResource(R.style.MyCaldroid);
Now the dates from other months will not be visible, but still you can click on them. Im working now to figure it out how to disable them.
EDIT :
If you want to disable dates
//date argument is current month visible on screen
public void disablePrevNextMonthDay(Date date){
disableDates.setTime(date); // disableDates is a Calendar object
disableDates.set(Calendar.DAY_OF_MONTH, 1); // 1st day of current month
caldroidFragment.setMinDate(disableDates.getTime());
int maxDay = disableDates.getActualMaximum(Calendar.DAY_OF_MONTH);
disableDates.set(Calendar.DAY_OF_MONTH, maxDay);
caldroidFragment.setMaxDate(disableDates.getTime()); //last day of current month
}
And you call this method in onChangeMonth() method from caldroid.
If you add to selector state_date_disabled in file similar to calendar_cell_text_color.xml and set background as white just like in previous example with text color you will have invisible non clicked dates.