Wsrtjtyk

Working on a small app with two Fragments, the second Fragment contains a couple spinners. I want to pass the user selection from the spinner to a recyclerView in the first Fragment. And I am stuck.

Looking at the Android documentation here: Spinner Doc

The last sentence in that doc says:

If you implement the AdapterView.OnItemSelectedListener interface with your Activity or Fragment (such as in the example above), you can pass this as the interface instance.

I'm a dirty newbie....I do not understand what is meant by "pass this as the interface instance"

This is my spinner code from the second Fragment

CreateNewJobFragment.kt

//String array. Move this to res/strings

    val theTown = arrayOf("Dublin", "Houston", "Paris", "Auckland", "Bismark")



    val townSpinner = binding.spinnerLocation



    //Adapter for spinner

    townSpinner.adapter = ArrayAdapter(activity, android.R.layout.simple_spinner_dropdown_item, theTown)



    //item selected listener for spinner

    townSpinner.onItemSelectedListener = object : AdapterView.OnItemSelectedListener {

        override fun onNothingSelected(p0: AdapterView<*>?) {

            TODO("not implemented yet") 

        }



        override fun onItemSelected(p0: AdapterView<*>?, p1: View?, p2: Int, p3: Long) {

            Toast.makeText(activity, theTown[p2], Toast.LENGTH_LONG).show()

            nameSpinner.onItemSelectedListener = this

        }

    }

My newb question is what do I do with 'nameSpinner.onItemSelectedListener = this'?

I have an adapter setup that at the moment is just passing dummy data to my recyclerView

JobAdapter.kt

class JobAdapter(private val jobList: ArrayList) : RecyclerView.Adapter() {

//Returning view for each item in the list

override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): JobAdapter.ViewHolder {

    val v = LayoutInflater.from(parent.context).inflate(R.layout.job_list_item, parent, false)

    return ViewHolder(v)

}



//Binding the data on the list

override fun onBindViewHolder(holder: JobAdapter.ViewHolder, position: Int) {

    holder.bindItems(jobList[position])

}



override fun getItemCount(): Int {

    return jobList.size

}



//Class holds the job list view

class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {



    fun bindItems(job: JobData) {

        val textViewCompnayName = itemView.findViewById(R.id.tv_companyName) as TextView

        val textViewLocation  = itemView.findViewById(R.id.tv_job_location) as TextView

        textViewCompnayName.text = job.companyName

        textViewLocation.text = job.location

    }

}

}

And a data class for it.

JobData.kt

data class JobData(val companyName: String,

               val location: String)

I'm fairly...ish certian I need to use utilize my JobAdapter to handle this. But I am not able to get it to work. I'm also looking at ViewModel, but have not figured out how to get this going.

Anyone wanna point me in the right direction?