[Java]Flagment 기본

 

- activity_fragment.xml

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

    <Button
        android:id="@+id/button"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="버튼"
        />
    <!-- fragment를 담을 container LinearLayout -->
    <LinearLayout
        android:id="@+id/container"
        android:layout_width="match_parent"
        android:layout_height="100dp"
        android:background="@color/teal_200"
        android:orientation="vertical" />

    <!--fragment 정적 생성 방식 -->
    <fragment
        android:id="@+id/fragment_3"
        android:name="com.example.myapplication.fragment.BlankFragment3"
        android:layout_width="match_parent"
        android:layout_height="100dp"
        />

</LinearLayout>

 

- FragmentActivity

public class FragmentActivity extends AppCompatActivity {

    FragmentManager fragmentManager;

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

         // Fragmet로 데이터 전달
//        Fragment blankfragment1 = new BlankFragment1();
//        Bundle bundle = new Bundle();
//        bundle.putString("param1", "파라메터 1");
//        bundle.putString("param2", "파라메터 2");
//        blankfragment1.setArguments(bundle);

        Fragment blankfragment1 = BlankFragment1.newInstance("파라메터1", "파라메터2");

        /**
         * LinearLayout container에 BlankFragment1 삽입
         * BlankFragment1 에 파라메터 데이터 전송
         */
        fragmentManager = getSupportFragmentManager();
        FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
        fragmentTransaction.add(R.id.container, blankfragment1);
        fragmentTransaction.commit();


        Button button = findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                /**
                 * BlankFragment1 -> BlankFragment3 로 container 교체
                 */
                FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
                fragmentTransaction.replace(R.id.container, new BlankFragment3());
                fragmentTransaction.commit();
            }
        });
    }
}

 

- fragment_blank1.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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=".fragment.BlankFragment1">

    <!-- TODO: Update blank fragment layout -->
    <TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center"
        android:text="BlankFragment View1" />

</FrameLayout>

 

- BlankFragment1.java

public class BlankFragment1 extends Fragment {


    // TODO: Rename parameter arguments, choose names that match
    // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
    private static final String ARG_PARAM1 = "param1";
    private static final String ARG_PARAM2 = "param2";

    // TODO: Rename and change types of parameters
    private String mParam1;
    private String mParam2;

    public BlankFragment1() {
        // Required empty public constructor
    }

    /**
     * Use this factory method to create a new instance of
     * this fragment using the provided parameters.
     *
     * @param param1 Parameter 1.
     * @param param2 Parameter 2.
     * @return A new instance of fragment BlankFragment1.
     */
    // TODO: Rename and change types and number of parameters
    public static BlankFragment1 newInstance(String param1, String param2) {
        BlankFragment1 fragment = new BlankFragment1();
        Bundle args = new Bundle();
        args.putString(ARG_PARAM1, param1);
        args.putString(ARG_PARAM2, param2);
        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // Activity에서 전달된 데이터 확인
        if (getArguments() != null) {
            mParam1 = getArguments().getString(ARG_PARAM1);
            mParam2 = getArguments().getString(ARG_PARAM2);
            Log.d("arguments", "param1 : " + mParam1 + " / " + "param2 : " + mParam2);
        }
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View view = inflater.inflate(R.layout.fragment_blank1, container, false);
        view.setBackgroundColor(Color.parseColor("#ff00ff"));
        return view;
    }
}