Android Custom Spinner with Recycling Behavior and Optimization. Full Demo with Kotlin code.

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Spinners provide a quick way to select one value from a set. In the default state, a spinner shows its currently selected value. Touching the spinner displays a dropdown menu with all other available values, from which the user can select a new one.
Create a simple spinner using ArrayAdapter
Create customised spinner with a custom Array Adapter
Optimise the custom spinner by recycling View objects of each row
Learn to use getView, getDropDownView, onItemSelected, onNothingSelected methods
Implement onItemSelectedListener on the Spinner

Github source code: https://bit.ly/git-spinner
Download GIST files: https://bit.ly/gist-spin

Chapters
00:00 Video starts
00:29 Demo objective
01:18 What is ArrayAdapter?
01:52 Initial Project Setup
03:20 Demo Simple Spinner
06:54 onItemSelectedListener
09:37 Custom Spinner
17:42 Spinner Optimization
19:42 What's Next?
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