Spinner already Selected Item Selection event

Question

Scenario: I am using Spinner for date range selection, which is working perfectly. The issue is, there is an option "Custom Range" on which I have to open a custom date range picker. Although it is working fine for the first time.

The issue is: When users click it again, it doesn't call onItemSelected(parent: AdapterView<*>?, view: View?, position: Int, id: Long) (which is a functionality of Spinner). But from the user point of view, it's a bug.

Is there any way, we can get any selection event on an already selected item of Spinner?

Answer 1

To call an event on the already selected item in Spinner You can do it in this way:

1. Create Your own Spinner class by extending AppCompatSpinner:

import android.content.Context
import android.util.AttributeSet
import android.util.Log

class MySpinner(context: Context, attrs: AttributeSet?) : androidx.appcompat.widget.AppCompatSpinner(
    context,
    attrs
)
{
    var listener: OnItemSelectedListener? = null

    override fun setSelection(position: Int)
    {
        super.setSelection(position)
        if (position == selectedItemPosition)
        {
            listener!!.onItemSelected(this, selectedView, position, selectedItemId)
        }
    }

    override fun setOnItemSelectedListener(listener: OnItemSelectedListener?)
    {
        this.listener = listener
    }
}

2. Use it in Your layout:

<com.yourcompany.kotlintest.MySpinner
    android:id="@+id/spinner"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    />

3. When creating a layout do this:

class MainActivity : AppCompatActivity()
{
    override fun onCreate(savedInstanceState: Bundle?)
    {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val spinner = findViewById<MySpinner>(R.id.spinner)

        spinner.adapter = ArrayAdapter(
            this,
            android.R.layout.simple_spinner_dropdown_item,
            arrayListOf("One", "Two", "Three")
        )

        spinner.onItemSelectedListener = object :
                AdapterView.OnItemSelectedListener
        {
            override fun onItemSelected(
                parent: AdapterView<*>,
                view: View, position: Int, id: Long
            )
            {
                Log.d("MyTag", "Click item at pos $position")
            }

            override fun onNothingSelected(parent: AdapterView<*>)
            {
                Log.d("MyTag", "Nothing selected")
            }
        }
    }
}

Now when You reselect the same item function will be executed