Created
January 22, 2020 14:14
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Custom ArrayAdapter for Spinner Views in Android
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package me.a_hoffmann.exampleapp | |
import android.content.Context | |
import android.view.LayoutInflater | |
import android.view.View | |
import android.view.ViewGroup | |
import android.widget.ArrayAdapter | |
import android.widget.TextView | |
import me.a_hoffmann.exampleapp.R | |
/** | |
* ArrayAdapter which shows values for a custom Model [MyModel]. Makes it easy to show a certain value in a Spinner | |
* and get a different return value for it. | |
*/ | |
class CustomArrayAdapter(context: Context, resource: Int, var items: List<MyModel>) | |
: ArrayAdapter<CustomArrayAdapter.MyModel>(context, resource, items) { | |
val inflater: LayoutInflater = LayoutInflater.from(context) | |
// Custom for this adapter. It's only here as an example | |
data class MyModel(val id: Int, val name: String) | |
// If required, get the ID from your Model. If your desired return value can't be converted to long use getItem(int) instead | |
override fun getItemId(position: Int): Long { | |
return items[position].id.toLong() | |
} | |
override fun getView(position: Int, convertView: View, container: ViewGroup): View { | |
var view: View? = convertView | |
if (view == null) { | |
view = inflater.inflate(R.layout.custom_spinner_layout, container, false) | |
} | |
(view?.findViewById(android.R.id.text1) as TextView).text = getItem(position)!!.name | |
return view | |
} | |
override fun getDropDownView(position: Int, convertView: View, parent: ViewGroup): View { | |
var view: View? = convertView | |
if (view == null) { | |
view = inflater.inflate(R.layout.custom_spinner_layout, parent, false) | |
} | |
(view?.findViewById(android.R.id.text1) as TextView).text = getItem(position)!!.name | |
return view | |
} | |
} |
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