Fragment 기초 예제 3

[Android] - 개념/Fragment 2016. 12. 4. 22:50

[ Fragment 기초 예제 3 ] 0. 참고 : DO IT 안드로이드 (02-10 : SampleFragment2)

1. Layout3개

- activity_main.xml fragment_list.xml fragment_viewer.xml

2. 실행 화면

1. activity_main.xml

- <fragment> 2개를 위/아래로 가지고 있음

- android:name : Fragment를 넣을 객체명 지정

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <fragment
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:name="org.androidtown.fragment.ListFragment"
        android:id="@+id/listFragment" />

    <fragment
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:name="org.androidtown.fragment.ViewerFragment"
        android:id="@+id/viewerFragment" />

</LinearLayout>

2. fragment_list.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ListView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/listView" />
</LinearLayout>

3. fragment_viewer.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/imageView"
        android:src="@drawable/dream01"/>

</LinearLayout>

4. MainActivity.java

- drawable 폴더 밑으로 dream01.png, dream02.png, dream03.png 이미지 3개 필요

public class MainActivity extends AppCompatActivity implements ListFragment.ImageSelectionCallback {
    ListFragment listFragment;
    ViewerFragment viewerFragment;

    int[] images = {R.drawable.dream01, R.drawable.dream02, R.drawable.dream03};

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

        FragmentManager manager = getSupportFragmentManager();
        listFragment = (ListFragment) manager.findFragmentById(R.id.listFragment);
        viewerFragment = (ViewerFragment) manager.findFragmentById(R.id.viewerFragment);
    }

    @Override
    public void onImageSelected(int position) {
        viewerFragment.setImage(images[position]);
    }
}

5. ListFragment.java

public class ListFragment extends Fragment {
    String[] values = {"첫번째 이미지", "두번째 이미지", "세번째 이미지"};

    public static interface ImageSelectionCallback {
        public void onImageSelected(int position);
    }

    public ImageSelectionCallback callback;

    @Override
    public void onAttach(Context context) {
        super.onAttach(context);

        if (context instanceof ImageSelectionCallback) {
            callback = (ImageSelectionCallback) context;
        }
    }

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        ViewGroup rootView = (ViewGroup) inflater.inflate(R.layout.fragment_list, container, false);

        ListView listView = (ListView) rootView.findViewById(R.id.listView);
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(getContext(), android.R.layout.simple_list_item_1, values);
        listView.setAdapter(adapter);

        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                if (callback != null) {
                    callback.onImageSelected(position);
                }
            }
        });

        return rootView;
    }
}

6. ViewerFragment.java

public class ViewerFragment extends Fragment {
    ImageView imageView;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        ViewGroup rootView = (ViewGroup) inflater.inflate(R.layout.fragment_viewer, container, false);

        imageView = (ImageView) rootView.findViewById(R.id.imageView);

        return rootView;
    }

    public void setImage(int resId) {
        imageView.setImageResource(resId);
    }
}