Take value from spinner-CodePudding

I am making a program which includes a spinner and i need that when you select an item from the spinner it shows it in a text view. This is the code i have so far:

val spinner_1 = findViewById<Spinner>(R.id.drop_1)
if (spinner_1 != null) {
    val adapter = ArrayAdapter(this,
                android.R.layout.simple_spinner_item, lands)
    spinner_1.adapter = adapter}

var text = ""
text = spinner_1.getSelectedItem().toString()

val choice = findViewById<View>(R.id.textView_choice) as TextView
choice.setText(text)

I think i did something wrong with text = spinner_1.getSelectedItem().toString(). What should i do?

CodePudding user response：

In Kotlin its works like that.

yourSpinner?.onItemSelectedListener = object : AdapterView.OnItemSelectedListener{
        override fun onNothingSelected(parent: AdapterView<*>?) {

        }

        override fun onItemSelected(parent: AdapterView<*>?, view: View?, position: Int, id: Long) {
               val selectedItem = parent.getItemAtPosition(position).toString()

        choice.setText(selectedItem)
           

        }

}

CodePudding user response：

You need to add onItemSelectedListener on spinner like this

spinner.onItemSelectedListener = this

and then, need to implement its method

       override fun onItemSelected(parent: AdapterView<*>, view: View?, pos: Int, id: Long) {
      // On selecting a spinner item
        String item = parent.getItemAtPosition(pos).toString();
          
          // Showing selected spinner item
          Toast.makeText(parent.getContext(), "Selected: "   item, Toast.LENGTH_LONG).show()
       }
       override fun onNothingSelected(parent: AdapterView<*>) {
          // TODO Auto-generated method stub
       }