Android studio使用replace替换fragment时原fragment的组件还存在

Question

package com.example.home;

import android.annotation.SuppressLint;
import android.os.Bundle;

import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentTransaction;

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;

public class LoginFragment extends Fragment {

Button bt1;
private MeFragment meFragment=new MeFragment();
private LoginFragment loginFragment;

@SuppressLint("ResourceType")
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View loginlayout = inflater.inflate(R.layout.fragment_login, container, false);
    bt1 = loginlayout.findViewById(R.id.login);
    bt1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            FragmentManager fm = getActivity().getSupportFragmentManager();
            FragmentTransaction transaction = fm.beginTransaction();
            transaction.replace(R.id.tab_login1, meFragment).commit();
        }
    });
    return loginlayout;
}

}

点击登陆后 个人中心和登陆界面并存了

Answer 1

你这一步应该放到承载fragment的activity中去，在activity中新建多个fragment可以切换。
你在fragment中切换.....