package com.example.applicationp0;
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 androidx.navigation.NavController;
import androidx.navigation.Navigation;
import androidx.navigation.ui.AppBarConfiguration;
import androidx.navigation.ui.NavigationUI;
import android.os.Bundle;
import android.view.MenuItem;
import com.example.applicationp0.bilibili.HomeFragment;
import com.example.applicationp0.bilibili.IndexFragment;
import com.example.applicationp0.bilibili.SearchFragment;
import com.google.android.material.bottomnavigation.BottomNavigationView;
/**
* 相同的部分在于
* 都是使用BottomNavigationView+fragment的切换来实现的
*