Android Example 2 : Use Spinner To select item and display result on but...

MainActivity.java

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public class MainActivity extends AppCompatActivity {



   // define spinner

    Spinner sp ;



    //DEFINE TEXT VIEW

    TextView display_data ;

    //make string Arrary

    String names[] = {"Red","Blue","Green"};

    //defins array adapter of string type

    ArrayAdapter <String> adapter;

    //define string variable for record

    String record= "";

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        sp = (Spinner)findViewById(R.id.spinner);

        adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,names);

        display_data = (TextView)findViewById(R.id.display_result);

        //set adapter to spinner

        sp.setAdapter(adapter);

        //set spinner method

        sp.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {

            @Override

            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {

                //use postion value

                switch (position)

                {

                    case 0:

                        record = "Red";

                        break;

                    case 1:

                        record = "Blue";

                        break;

                    case 2:

                        record = "Green";

                        break;

                }

            }

            @Override

            public void onNothingSelected(AdapterView<?> parent) {

            }

        });

    }

    //set display button click to show result

    public void diplsyResult(View view)

    {

        display_data.setTextSize(18);

        display_data.setText(record);

    }

}

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