memeDictionary/Amicool/app/src/main/java/com/example/amicool/SplashActivity.java

package com.example.amicool;

import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.view.WindowManager;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

import java.util.Timer;
import java.util.TimerTask;

public class SplashActivity extends AppCompatActivity implements View.OnClickListener{
    private int recLen = 5;//跳过倒计时提示5秒
     private TextView tv;
     Timer timer = new Timer();  //定义一个计时器
     private Handler handler;
     private Runnable runnable;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         //定义全屏参数
         int flag= WindowManager.LayoutParams.FLAG_FULLSCREEN;
         //设置当前窗体为全屏显示
         getWindow().setFlags(flag, flag);
         setContentView(R.layout.activity_splash);
         initView();
         timer.schedule(task, 1000, 1000);//等待时间一秒，停顿时间一秒
         // /*** 正常情况下不点击跳过*/
         handler = new Handler();
         handler.postDelayed(runnable = new Runnable() {
         @Override
         public void run() {
             //从闪屏界面跳转到首界面
             Intent intent = new Intent(SplashActivity.this, MainActivity.class);
             startActivity(intent);
             finish();
         }
         }, 5000);//延迟5S后发送handler信息
          }

     private void initView() {
      tv = findViewById(R.id.tv);//跳过
      tv.setOnClickListener(this);//跳过监听
       }
       TimerTask task = new TimerTask() {
         @Override
        public void run() {
                   runOnUiThread(new Runnable() { // UI thread
           @Override
              public void run() {
                                    recLen--;
                                        tv.setText("跳过 " + recLen);
                                         if (recLen < 0) {
                                                 timer.cancel();
                                                 tv.setVisibility(View.GONE);//倒计时到0隐藏字体
                                             }
                                   }
            });
       }
  };
    /**
       * 点击跳过
     */
   @Override
  public void onClick(View view) {
             switch (view.getId()) {
                        case R.id.tv:
                                //从闪屏界面跳转到首界面
                               Intent intent = new Intent(SplashActivity.this, MainActivity.class);
                               startActivity(intent);
                               finish();
                                 if (runnable != null) {
                                     handler.removeCallbacks(runnable);
                                     }
                              break;
                        default:
                             break;
                     }
    }
}