如何在视频直播app源码开发中实现开屏广告功能

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/img"
    tools:context=".SplashActivity">
 
    <TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:textSize="50dp"
        android:textColor="@color/white"
        android:text="My App"
        tools:ignore="HardcodedText,SpUsage"
        android:gravity="center"
        />
    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="跳过"
        android:layout_gravity="right"
        android:layout_marginTop="35dp"
        android:layout_marginRight="35dp"
        tools:ignore="HardcodedText,RtlHardcoded" />
 
</FrameLayout>

package com.example.screenadapter;
 
import androidx.appcompat.app.AppCompatActivity;
 
import android.annotation.SuppressLint;
import android.content.Intent;
import android.os.Bundle;
import android.os.CountDownTimer;
import android.os.Handler;
import android.widget.Button;
 
public class SplashActivity extends AppCompatActivity {
 
    private Button button; // "跳过" 按钮
    private Handler handler = new Handler();
    TimeCount timeCount;
    private Runnable runnable = new Runnable() {
        @Override
        public void run() {
            toMainActivity();
        }
    };
 
    /**
     *TODO 闪屏页 --》 最开始功能界面（首页面）
     */
    private void toMainActivity() {
        startActivity(new Intent(this, MainActivity.class));
        finish();
    }
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        setTheme(R.style.Theme_ScreenAdapter);
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_splash);
        
        initViews();
        //延迟 3s 发送，即当用户不主动点击跳过时，3s 后自动结束
        handler.postDelayed(runnable, 3000);
 
        timeCount = new TimeCount(4000, 1000);
        timeCount.start();
    }
 
    /**
     * 初始化 View
     */
    private void initViews() {
        button = findViewById(R.id.button);
        button.setOnClickListener(v -> {
            toMainActivity();
        });
    }
 
    // 倒计时计时器
    class TimeCount extends CountDownTimer{
 
 
        public TimeCount(long millisInFuture, long countDownInterval) {
            super(millisInFuture, countDownInterval);
        }
 
        @SuppressLint("SetTextI18n")
        @Override
        public void onTick(long l) {
            // 设置倒计时
            button.setText(l / 1000 + "s");
        }
 
        @Override
        public void onFinish() {
            // 移除掉 runnable 方法
            handler.removeCallbacks(runnable);
        }
    }
}