'프레그먼트'에 해당되는 글 1건

fragment란 activity안에 속해있는 화면으로 새로운 activity를 띄우는게 아니라,

하나의 activity에서 fragment만 바꿔가면서 보여주기 때문에

한 activity화면에서 여러개의 화면을 볼 수 있게 해주는 것이라고 할 수 있다.

https://developer.android.com/guide/components/fragments.html

본 예제는 두 개의 Fragment 를 생성하고 하나의 Fragment 만 Activity 상에 보이도록 할 것이다.
그리고, 액티비티의 버튼을 누르면 다른 Fragment 로 교체되도록 하는 내용에 대해서 적어둔다.

=== fragment01.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">

    <TextView
        android:id="@+id/tv01"
        android:text="프레그먼트01 입니다"
        android:textSize="20dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <Button
        android:id="@+id/btn01"
        android:text="Fragment02 로 이동"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</LinearLayout>

=== fragment02.xml ===

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:background="#ff0"
    android:gravity="center"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:id="@+id/tv02"
        android:text="프레그먼트02 입니다"
        android:textSize="20dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <Button
        android:id="@+id/btn02"
        android:text="Fragment 01로 이동"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</LinearLayout>

=== activity_main.xml ===

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/parentView"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <fragment
        android:id="@+id/frag01"
        android:name="com.tistory.link2me.fragment.Fragment01"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</RelativeLayout>

=== Fragment01.java ===

package com.tistory.link2me.fragment;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;

public class Fragment01 extends Fragment {

    public View onCreateView(LayoutInflater inflater, ViewGroup parentView, Bundle savedInstanceState){
        // 인플레이트(inflate)를 한다는 것은 동작 가능한 view 객체로 생성한다는 의미
        ViewGroup rootView = (ViewGroup) inflater.inflate(R.layout.fragment01, parentView,false);

        Button btn = (Button) rootView.findViewById(R.id.btn01);
        btn.setOnClickListener(new View.OnClickListener(){

            @Override
            public void onClick(View v) {
                MainActivity mainActivity = (MainActivity) getActivity();
                mainActivity.onFragmentChanged(0);
            }
        });

        return rootView;
    }
}

=== Fragment02.java ===

package com.tistory.link2me.fragment;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;

public class Fragment02 extends Fragment {
    public View onCreateView(LayoutInflater inflater, ViewGroup parentView, Bundle savedInstanceState){

        ViewGroup rootView = (ViewGroup) inflater.inflate(R.layout.fragment02, parentView,false);

        Button btn = (Button) rootView.findViewById(R.id.btn02);
        btn.setOnClickListener(new View.OnClickListener(){

            @Override
            public void onClick(View v) {
                MainActivity mainActivity = (MainActivity) getActivity();
                mainActivity.onFragmentChanged(1);
            }
        });

        return rootView;
    }
}

=== MainActivity.java ===

package com.tistory.link2me.fragment;

import android.support.v4.app.Fragment;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

public class MainActivity extends AppCompatActivity {

    Fragment01 fragment01;
    Fragment02 fragment02;

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

        // 초기 지정은 frag01 로

        fragment01 = (Fragment01) getSupportFragmentManager().findFragmentById(R.id.frag01);
        fragment02 = new Fragment02();
    }

    public void onFragmentChanged(int index){
        if(index == 0){
            getSupportFragmentManager().beginTransaction().replace(R.id.parentView,fragment02).commit();
        } else if(index == 1){
            getSupportFragmentManager().beginTransaction().replace(R.id.parentView,fragment01).commit();
        }
    }
}