ActionBar - 옵션 메뉴

* res > menu(폴더명 "menu"로 생성) > menu_main.xml 추가

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <item
        android:id="@+id/menu_refresh"
        android:title="새로고침"
        android:icon="@drawable/refresh"
        app:showAsAction="always" />

    <item
        android:id="@+id/menu_search"
        android:title="새로고침"
        android:icon="@drawable/search"
        app:showAsAction="always" />

    <item
        android:id="@+id/menu_settings"
        android:title="새로고침"
        android:icon="@drawable/setting"
        app:showAsAction="always" />

</menu>

 

* onCreateOptionsMenu, onOptionsItemSelected 메서드 재정의

public class MainActivity extends AppCompatActivity {

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

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.menu_main, menu);

        return true;
    }

    @Override
    public boolean onOptionsItemSelected(@NonNull MenuItem item) {
        int curId = item.getItemId();

        switch (curId) {
            case R.id.menu_refresh:
                showToast("새로고침 메뉴 선택됨");
                break;
            case R.id.menu_search:
                showToast("검색 메뉴 선택됨");
                break;
            case R.id.menu_settings:
                showToast("설정 메뉴 선택됨");
                break;
            default:
                break;
        }

        return super.onOptionsItemSelected(item);
    }

    public void showToast(String data) {
        Toast.makeText(this, data, Toast.LENGTH_LONG).show();
    }

}