Bottom Navigation Bar(activity_main.xml, MainActivity.java) ____ 참고

[honghyoeun]

No description provided.

[honghyoeun]

1. Bottom Navigation Bar __ activity_main.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:layout_width="match_parent"
        android:id="@+id/frameLayout"
        android:layout_above="@+id/btnNav"
        android:layout_alignParentBottom="true"
        android:layout_height="match_parent" />




    <com.google.android.material.bottomnavigation.BottomNavigationView
        android:layout_width="match_parent"
        android:id="@+id/btnNav"
        app:menu="@menu/menu"
        android:layout_alignParentBottom="true"
        android:layout_height="wrap_content"
        />


</RelativeLayout>

2. MainActivity.java

package com.example.bottomnavigatoin;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentTransaction;

import android.os.Bundle;
import android.view.MenuItem;

import com.google.android.material.bottomnavigation.BottomNavigationView;
import com.google.android.material.navigation.NavigationBarView;

public class MainActivity extends AppCompatActivity {

    BottomNavigationView bottomNavigationView;




    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        bottomNavigationView = findViewById(R.id.btnNav);


        fragementRepl(new HomeFragment());





        bottomNavigationView.setOnItemReselectedListener(new NavigationBarView.OnItemReselectedListener() {
            @Override
            public void onNavigationItemReselected(@NonNull MenuItem item) {

                switch ( item.getItemId()) {
                    case R.id.home:

                        fragementRepl(new HomeFragment());
                    break;

                    case R.id.chatting:

                        fragementRepl(new ChattingFragment());

                        break;

                    case R.id.favorite:

                        fragementRepl(new FavoriteFragment());

                        break;

                    case R.id.user:

                        fragementRepl(new UserFragment());

                        break;



                }


            }
        });
    }

    private void fragementRepl(Fragment fragment) {
        FragmentManager fragmentManager = getSupportFragmentManager();
        FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
        fragmentTransaction.replace(R.id.frameLayout,fragment);
        fragmentTransaction.commit();

    }




}