DynamicSpinner is a library content of each DynamicSpinner changes depending on the previous selection. You can find the demo application apk at the releases tab.
Probably, you're familiar with this nested list where each item has their own subcategory and we have to filter what subcategory is shown depending on what is selected in previous (parent) selection.
Demo application apk at the releases tab.
Min API level is: API 21 
Step 1. Add it in your root build.gradle at the end of repositories:
allprojects { repositories { ... maven { url 'https://jitpack.io' } } } Step 2. Add the dependency
dependencies { ... implementation 'com.github.mecoFarid:DynamicSpinner:1.0.1' } Step 1. Create xml file to hold your single spinner (let's call it item_spinner.xml)
<?xml version="1.0" encoding="utf-8"?> <com.mecofarid.dynamicspinner.view.SearchableView xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:id="@+id/searchable_view" android:layout_width="match_parent" android:layout_height="wrap_content" app:ds_icon_closeSearchView="@drawable/default_close_searchview_icon" app:ds_icon_openSearchView="@drawable/default_open_searchview_icon" app:ds_iconColor_openSearchView="@color/default_color_open_searchview_icon" app:ds_iconColor_closeSearcView="@color/default_color_open_searchview_icon" app:ds_isSearchable="true" app:ds_textSelectionMode="end" app:cardElevation="@dimen/cardview_default_elevation" app:cardCornerRadius="@dimen/cardview_default_radius" app:cardUseCompatPadding="true"/> Step 2. Add your DynamicSpinner view to xml file where you want it
<com.mecofarid.dynamicspinner.view.DynamicSpinner android:id="@+id/dynamic_spinner" android:layout_width="match_parent" android:layout_height="wrap_content"/> Step 3. Create model objects
Remember to extend ItemSpinner and add @SubCategory annotation to subcategory
class Country: ItemSpinner { var name: String? = null var code: Integer = 0 @SubCategory var cityList:List<City>? = emptyList() } Step 4. Add your nested list
class MainActivity : AppCompatActivity(), DynamicSpinnerAdapter.SpinnerItemSelectedListener{ override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) // Nested country list (JSON) val planetStructureJson = "{\n" + " \"countryList\": [\n" + " {\n" + " \"code\": 6,\n" + " \"name\": \"Estonia\",\n" + " \"cityList\": [\n" + " {\n" + " \"name\": \"Tallin\",\n" + " \"code\": 60\n" + " }\n" + " ]\n" + " }\n" + " ]\n" + " }" // You can use Google's Gson library to convert JSON to List val planetStructureList = ... // Initialize adapter list?.let { dynamic_spinner.adapter = DynamicSpinnerAdapter(it, this, R.layout.item_spinner) } } // You can get selected item in this callback override fun onItemSelected(itemSpinner: ItemSpinner) { } } | Atribute name | Default | Available | Description |
|---|---|---|---|
| app:ds_icon_closeSearchView |  | any drawable | - |
| app:ds_icon_openSearchView |  | any drawable | - |
| app:ds_iconColor_openSearchView | #808080 | any color | - |
| app:ds_iconColor_closeSearcView | #808080 | any color | - |
| app:ds_isSearchable | true | true | false | if true content is searchable |
| app:ds_textSelectionMode | end | start | all | end | position of cursor when SearchableView opened, all means all text will be selected |
| app:cardCornerRadius | 2dp | any dimension | radius on the edges |
| app:cardElevation | 2dp | any dimension | layout elevation |
| app:cardUseCompatPadding | true | true | false | padding between spinner items |