#Android studio spinner with numbers how to#
#Android studio spinner with numbers update#

Note that the first and last dates in the list are epoch dates. This may seem like overkill if you just need the months, but if you need specific date manipulation, this is what you would do. When it comes to data, we need to generate it.

#Android studio spinner with numbers update#

This could be used to update other parts of our view. However, this setup will allow us to watch for changes of the selected month. If you aren’t used to live data, this might look a bit odd. Val selectedMonth: LiveData = _selectedMonth Private val _selectedMonth = MutableLiveData() It will hold our data for the recycler view and the item we are viewing. Now we need a class that extends ViewModel. (This will be the last item in the constraint layout.) Next, we can add this to our layout on top of the RecyclerView. This will create a three-color band with a transparent center. To compensate for this, we can set the center color to have no alpha and then offset it. Note that the gradient will always span the full view. An individual shape won’t work because we could only use a single gradient. So far, this looks decent, but it would be nice to fade the edges of the RecyclerView. You can use what you’d like for the arrows on the buttons. Here, I’ve specified the layout manager to use and added tools:listitem to see what my month_items will look like in the view. You will also want to set the width for the ConstraintLayout to something like 150dp.įor the main fragment layout, we want a RecyclerView flanked by two buttons. There’s not much reason to show code for this, but just make sure to include an ID for both the ConstraintLayout and the TextView. This project is simple enough we just need a TextView inside a ConstraintLayout. Implementation 'androidx.recyclerview:recyclerview:1.0.0'įirst, you need a layout for your items/rows/cells. Implementation 'nstraintlayout:constraintlayout:2.0.0-alpha2' Implementation 'androidx.appcompat:appcompat:1.0.0'

#Android studio spinner with numbers how to#

In this post, I will be showing you how to make a month picker/spinner in Kotlin.īefore we get started, make sure to add these to your dependencies. (Android has a “spinner,” but it’s really just a drop-down list. I think “spinner” would be a better name, because it looks like it spins. A “picker” is a small scrollable list of defined values that looks like a combination lock with dials.