앱만들기.12(fragment)

fragment

조각들

 

조각들을 교체해주는 레이아웃

Framlayout

 

relative , frame, linear 레이아웃들을 다양하게 섞어서 사용가능

현재 relative 안에 linear가 있어서 linear에서 relative 속성 사용가능

android:layout_alignParentBottom="true"

 

OncreateView는 Mainactivity.java의 생명주기 ocreate와 같이

fragment의 생명주기임.

 

---

Mainactivity

package com.example.fragmentexmaple;

import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentTransaction;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {

    Button btn_1,btn_2,btn_3,btn_4;


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

        btn_1 = (Button)findViewById(R.id.btn_1);
        btn_2 = (Button)findViewById(R.id.btn_2);
        btn_3 = (Button)findViewById(R.id.btn_3);
        btn_4 = (Button)findViewById(R.id.btn_4);

        //버튼 클릭했을때 액션 지정
        btn_1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
                Fragment1 fragment1 = new Fragment1();
                transaction.replace(R.id.frame,fragment1);
                transaction.commit();
                //바꾼다음에 저장해라 , 새로고침같은 개념

            }
        });
        btn_2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
                Fragment2 fragment2 = new Fragment2();
                transaction.replace(R.id.frame,fragment2);
                transaction.commit();
                //바꾼다음에 저장해라 , 새로고침같은 개념

            }
        });
        btn_3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
                Fragment3 fragment3 = new Fragment3();
                transaction.replace(R.id.frame,fragment3);
                transaction.commit();
                //바꾼다음에 저장해라 , 새로고침같은 개념

            }
        });
        btn_4.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
                Fragment4 fragment4 = new Fragment4();
                transaction.replace(R.id.frame,fragment4);
                transaction.commit();
                //바꾼다음에 저장해라 , 새로고침같은 개념

            }
        });



    }
}

fragment 1,2,3,4 (숫자만바꾸면됨)

package com.example.fragmentexmaple;

import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;

public class Fragment1 extends Fragment {
    public Fragment1() {

    }

    @Nullable

    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable  ViewGroup container, @Nullable  Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment1,container,false);
    }
}

fragment xml 1,2,3,4

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="나는천재"
        android:textSize="30sp"
    ></TextView>
</FrameLayout>

activity.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
    tools:context=".MainActivity">

    <FrameLayout

        android:id="@+id/frame"
        android:layout_width="match_parent"
        android:layout_height="match_parent">


    </FrameLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:layout_alignParentBottom="true"
        >
        <Button
            android:id="@+id/btn_1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="메뉴 1"/>
        <Button
            android:id="@+id/btn_2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="메뉴 2"/>
        <Button
            android:id="@+id/btn_3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="메뉴 3"/>
        <Button
            android:id="@+id/btn_4"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="메뉴 4"/>

    </LinearLayout>
</RelativeLayout>

 

결과

메뉴1

 

결과

메뉴2

메뉴3

메뉴4