Android_隐藏标题栏

package com.lyarn.study;

import androidx.appcompat.app.ActionBar;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //隐藏标题栏
        ActionBar actionBar=getSupportActionBar();
        actionBar.hide();
    }
}