冲刺第二天

预期十天完成，今天开始编写各自负责的页面，还剩8天


编写一个底部导航栏 其适配器页面
`package com.example.yibaifen;

import android.os.Bundle;

import androidx.annotation.NonNull;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentActivity;
import androidx.viewpager2.adapter.FragmentStateAdapter;

public class MyFragmentAdapter extends FragmentStateAdapter {
private String userdata ;
public MyFragmentAdapter(FragmentActivity fa,String userdata) {
super(fa);
this.userdata=userdata;

}

@NonNull
@Override
public Fragment createFragment(int position) {
    Bundle args = new Bundle();
    args.putString("userdata",userdata);
    switch (position) {
        case 0:
            HomeFragment homeFragment = new HomeFragment();
            homeFragment.setArguments(args);
            return homeFragment;
        case 1:
            MyFragment myFragment = new MyFragment();
            myFragment.setArguments(args);
            return myFragment;
        case 2:
            OrgFragment orgFragment = new OrgFragment();
            orgFragment.setArguments(args);
            return orgFragment;
        // 添加更多case来对应其他Fragment
        default:
            return new HomeFragment();
    }
}

@Override
public int getItemCount() {
    return 3; // 根据你的RadioButton数量调整
}

}`