package com.example.myapplication;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;

import android.view.Window;

public class MainActivityextends AppCompatActivity {

@Override

? ? protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

//靜態(tài)引用fragment必須要加這一句

? ? ? ? requestWindowFeature(Window.FEATURE_NO_TITLE);

setContentView(R.layout.activity_main);

}

}