android 实现左右滑动和底部菜单切换Demo

package com.tools.ttt;


import static android.content.ContentValues.TAG;

import android.content.pm.ActivityInfo;
import android.content.res.Configuration;
import android.os.Bundle;
import android.util.Log;
import android.view.MenuItem;

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

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentActivity;
import androidx.navigation.NavController;
import androidx.navigation.Navigation;
import androidx.navigation.ui.AppBarConfiguration;
import androidx.navigation.ui.NavigationUI;
import androidx.viewpager.widget.ViewPager;
import androidx.viewpager2.adapter.FragmentStateAdapter;
import androidx.viewpager2.widget.ViewPager2;

import com.google.android.material.bottomnavigation.LabelVisibilityMode;
import com.google.android.material.navigation.NavigationBarView;
import com.tools.qrtestassist.databinding.ActivityMainBinding;
import com.tools.qrtestassist.ui.BindTagsFragment;
import com.tools.qrtestassist.ui.PrintLabelsFragment;
import com.tools.qrtestassist.ui.SearchFragment;
import com.tools.qrtestassist.ui.SettingsFragment;
import com.tools.qrtestassist.ui.StatisticsFragment;

public class MainActivity extends AppCompatActivity {

    private ActivityMainBinding binding;
    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        // 不执行任何操作以阻止方向更改
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //固定竖屏模式
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

        binding = ActivityMainBinding.inflate(getLayoutInflater());
        setContentView(binding.getRoot());

        AppBarConfiguration appBarConfiguration = new AppBarConfiguration.Builder(
                R.id.navigation_statistics, R.id.navigation_bind_tags, R.id.navigation_search,R.id.navigation_print_labels,R.id.navigation_settings)
                .build();
        ViewPager2 viewPager = findViewById(R.id.viewPager);
        viewPager.setAdapter(new MyFragmentAdapter(this));

        BottomNavigationView navView = findViewById(R.id.nav_view);
        navView.setLabelVisibilityMode(LabelVisibilityMode.LABEL_VISIBILITY_LABELED);

//        删除之前的fragment自动导航管理
//        NavController navController = Navigation.findNavController(this, main_fragment);
//        NavigationUI.setupActionBarWithNavController(this, navController, appBarConfiguration);
//        NavigationUI.setupWithNavController(binding.navView, navController);

        viewPager.registerOnPageChangeCallback(new ViewPager2.OnPageChangeCallback() {
            @Override
            public void onPageSelected(int position) {
                // 页面选中时执行操作
                BottomNavigationView navView = findViewById(R.id.nav_view);
                Log.i(TAG, "onPageSelected: " + position);
                navView.getMenu().getItem(position).setChecked(true);
                MainActivity activity = MainActivity.this;
                activity.setTitle(navView.getMenu().getItem(position).getTitle());
            }
        });

        navView.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
            @Override
            public boolean onNavigationItemSelected(@NonNull MenuItem item) {
                // 获取外部 Activity 对象
                MainActivity activity = MainActivity.this;
                int itemId = item.getItemId(); // 将结果存储在常量中
                activity.setTitle(item.getTitle());
                if (itemId == R.id.navigation_A) {

                    viewPager.setCurrentItem(0);
                } else if (itemId == R.id.navigation_B) {
                    viewPager.setCurrentItem(1);
                } else if (itemId == R.id.navigation_C) {
                    viewPager.setCurrentItem(2);
                } else if (itemId == R.id.navigation_D) {
                    viewPager.setCurrentItem(3);
                } else if (itemId == R.id.navigation_E) {
                    viewPager.setCurrentItem(4);
                }
                return true;
            }
        });



    }

    private static class MyFragmentAdapter extends FragmentStateAdapter {
        private static final int NUM_PAGES = 5;

        public MyFragmentAdapter(FragmentActivity fragmentActivity) {
            super(fragmentActivity);
        }

        @Override
        public Fragment createFragment(int position) {
            switch (position) {
                case 0:
                    return new A_Fragment();
                case 1:
                    return new B_Fragment();
                case 2:
                    return new C_Fragment();
                case 3:
                    return new D_Fragment();
                case 4:
                    return new E_Fragment();
                default:
                    return new F_Fragment();
            }
        }

        @Override
        public int getItemCount() {
            return NUM_PAGES;
        }
    }

}

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <androidx.viewpager2.widget.ViewPager2
        android:id="@+id/viewPager"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toTopOf="@id/nav_view"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent" />

    <com.google.android.material.bottomnavigation.BottomNavigationView
        android:id="@+id/nav_view"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="0dp"
        android:layout_marginEnd="0dp"
        android:background="?android:attr/windowBackground"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:menu="@menu/bottom_nav_menu" />


</androidx.constraintlayout.widget.ConstraintLayout>