#15 ( spinner )

- 콤보박스 같은 기능 구현하기.

- 목록 선택하면 하단에 Toast로 선택한 내용 표시하기.

 

 

(1) activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" >

    <Spinner
        android:id="@+id/spinner1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:entries="@array/items"/>

    <Spinner
        android:id="@+id/spinner2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/spinner1" />

</RelativeLayout>

 

 

(2)MainActivity.java

package com.example.test14_spinner;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.Toast;

public class MainActivity extends Activity {
    Spinner spinner;
    String arr[]={"민들레","장미","목련꽃","개나리"};
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //스피너 참조값 얻어오기
        spinner=(Spinner)findViewById(R.id.spinner2);

 

        //어댑터 만들기
        ArrayAdapter<String> adapter=
            new ArrayAdapter<String>(this,
                    android.R.layout.simple_spinner_item,
                    arr);
        //드롭다운할때 보여질 뷰 지정
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
       
        //어댑터와 스피너 연결하기
        spinner.setAdapter(adapter);

 

        //스피너를 선택했을때 이벤트 설정하기(선택항목 출력)
        spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View v,
                    int position, long id) {
                //선택된 인덱스에 해당하는 값을 arr배열에서 얻어오기
                String str=arr[position];
                Toast.makeText(MainActivity.this,"선택한 항목:" + str,
                        Toast.LENGTH_SHORT).show();
            }
            @Override
            public void onNothingSelected(AdapterView<?> parent) {
    
            }
        });

    }

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