Unable to set OnItemClickListener for spinner in android

Question

In the configured RecyclerView.Adapter<CustomAdapter.ViewHolder> , I installed the adapter for the counter and found that the value of my counter does not change after selection, so I tried to add OnItemClickListener to my counter:

 override fun onBindViewHolder(viewHolder: ViewHolder, position: Int) { // The selectable items of the spinner is dynamically generated from getItems() function val selectableItems: List<String> = getItems() val spinnerAdapter = ArrayAdapter<String>(this.context, androi.R.layout.simple_spinner_item) spinnerAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item) spinnerAdapter.addAll(selectableItems) viewHolder.mySpinner.adapter = spinnerAdapter // the error occurs on the following line: viewHolder.mySpinner.onItemClickListener = AdapterView.OnItemClickListener { adapterView, view, i, l -> adapterView.setSelection(i) } viewHolder.mySpinner.setSelection(origionSelectedPosition) } 

At compile time, I did not receive any warnings or errors, however at run time I received a RuntimeException saying that setOnItemClickListener cannot be used with a spinner . This is strange. Am I doing something wrong in my code? Or does anyone know why my counter has not changed with the appropriate choice?

Further description of the Kotlin solution:

I have ever tried to use onItemSelectedListener , but could not find a suitable way to use it in kotlin. But finally! The following code solved my problem:

  viewHolder.mySpinner.onItemSelectedListener = object : AdapterView.OnItemSelectedListener { override fun onItemSelected(parent: AdapterView<*>, view: View, pos: Int, id: Long) { } override fun onNothingSelected(parent: AdapterView<out Adapter>?) { } } 

Answer 1

Use setOnItemSelectedListener instead of onItemClickListener .

 viewHolder.mySpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { @Override public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { } @Override public void onNothingSelected(AdapterView<?> parent) { } }); 

Answer 2

After sasikumar's answer, I solved it in kotlin with the following code:

 viewHolder.mySpinner.onItemSelectedListener = object : AdapterView.OnItemSelectedListener { override fun onItemSelected(parent: AdapterView<*>, view: View, pos: Int, id: Long) { } override fun onNothingSelected(parent: AdapterView<out Adapter>?) { } } 

Answer 3

Initialize the spinner in the onCreate function first.

  var spinner : Spinner ?= null spinner = findViewById(R.id.spinner) as Spinner 

Now add the details using Spinner. Here I used an array from a string resource.

  fun addSpinnerData(){ var arr = (resources.getStringArray(R.array.data_list).toMutableList()); adapter = ArrayAdapter<String>( this, android.R.layout.simple_list_item_1, arr) spinner!!.setAdapter(adapter); spinner!!.onItemSelectedListener = object : AdapterView.OnItemSelectedListener{ override fun onItemSelected(p0: AdapterView<*>?, p1: View?, p2: Int, p3: Long) { Toast.makeText(applicationContext," On Click",Toast.LENGTH_SHORT).show(); } override fun onNothingSelected(p0: AdapterView<*>?) { } } } 

This way you can achieve onItemSelectedListener for Spinner

Answer 4

You can create a very simple extension function:

file: Extensions.kt

 fun Spinner.setOnItemSelectedListener(listener: AdapterView.OnItemSelectedListener) { onItemSelectedListener = listener } 

Then you can call it whatever you want.

 spinner.setOnItemSelectedListener(object: AdapterView.OnItemSelectedListener { override fun onItemSelected(parent: AdapterView<*>?, view: View?, position: Int, id: Long) { } override fun onNothingSelected(parent: AdapterView<*>?) { } }) 

As in previous answers, but it looks more like the original version instead of assigning