Fórum Duvida com Spinner #535721

<TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Digite o salario"
        android:id="@+id/textView" />

    <EditText
        android:id="@+id/salario"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:inputType="number|numberDecimal"
        android:layout_marginTop="23dp"
        android:layout_below="@+id/textView"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Selecione o aumento"
        android:id="@+id/textView2"
        android:layout_marginTop="47dp"
        android:layout_below="@+id/salario"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Calcular"
        android:id="@+id/btnCalcular"
        android:layout_marginBottom="133dp"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true" />

    <Spinner
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/spinner"
        android:spinnerMode="dropdown"
        android:layout_below="@+id/textView2"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_marginTop="28dp" />

package com.example.iacei.salario;

import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.Spinner;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    //declarar a combobox
    Spinner spinnerSalario;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //instanciar a combobox
        spinnerSalario = (Spinner) findViewById(R.id.spinner);
        ArrayAdapter adapter = ArrayAdapter.createFromResource(this, R.array.spinnerSalario, android.R.layout.simple_spinner_dropdown_item);
        spinnerSalario.setAdapter(adapter);

        //instanciar botao para calcular on click

        Button calcular = (Button) findViewById(R.id.btnCalcular);
        calcular.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String item = spinnerSalario.getSelectedItem().toString();
                Toast.makeText(getApplicationContext(),"Item Escolhido: "+item, Toast.LENGTH_SHORT).show();
            }
        });


        AdapterView.OnItemSelectedListener escolha = new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
              //  String item = spinnerSalario.getSelectedItem().toString();
              //  Toast.makeText(getApplicationContext(),"Item Escolhido: "+item, Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {

            }
        };

        spinnerSalario.setOnItemSelectedListener(escolha);

    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }



}