CollaspingToolBarLayout-Activity

package com.tistory.firewallgogo.ex52collapsingtoolbarlayout;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import android.os.Bundle;

public class MainActivity extends AppCompatActivity {

Toolbar toolbar;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

toolbar = findViewById(R.id.toolbar); //툴바연결
setSupportActionBar(toolbar);          //툴바 - 제목 대체하기. 
}
}