Java Android Studio启动屏幕后关闭Webview应用程序

我正在创建一个Webview应用程序，需要在加载时添加启动屏幕。 我尝试了不同的方法，用这个“启动”，但在启动屏幕后它就关闭了。如何使应用程序显示初始屏幕并正确打开

SplashScreen.java:

package com.example.evrika;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;

public class SplashScreen extends AppCompatActivity {

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

    Handler handler = new Handler();
    handler.postDelayed(new Runnable() {
        @Override
        public void run() {
            startActivity(new Intent(SplashScreen.this,MainActivity.class));
            finish();
        }
    },1000);
}
}

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout             
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"
tools:context=".MainActivity">

<WebView
  android:id="@+id/webView"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  />
</androidx.constraintlayout.widget.ConstraintLayout>

package com.example.evrika;

import androidx.appcompat.app.AppCompatActivity;

import android.annotation.TargetApi;
import android.os.Build;
import android.os.Bundle;
import android.webkit.WebResourceRequest;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;

public class MainActivity extends AppCompatActivity {


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    getSupportActionBar().hide();
    WebView webView = findViewById(R.id.webView);
    webView.getSettings().setJavaScriptEnabled(true);
    webView.getSettings().setBuiltInZoomControls(false);
    webView.getSettings().setSupportZoom(false);
    webView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
    webView.getSettings().setAllowFileAccess(true);
    webView.getSettings().setDomStorageEnabled(true);
    webView.getSettings().setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);
    webView.loadUrl("https://evrikaspace.ru/");


    WebViewClient webViewClient = new WebViewClient() {
    @SuppressWarnings("deprecation") @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
        view.loadUrl(url);
        return true;
    }
    @TargetApi(Build.VERSION_CODES.N) @Override
    public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
        view.loadUrl(request.getUrl().toString());
        return true;
        }
    };
    webView.setWebViewClient(webViewClient);
}
}

活动\u main.xml:

package com.example.evrika;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;

public class SplashScreen extends AppCompatActivity {

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

    Handler handler = new Handler();
    handler.postDelayed(new Runnable() {
        @Override
        public void run() {
            startActivity(new Intent(SplashScreen.this,MainActivity.class));
            finish();
        }
    },1000);
}
}

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout             
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"
tools:context=".MainActivity">

<WebView
  android:id="@+id/webView"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  />
</androidx.constraintlayout.widget.ConstraintLayout>

package com.example.evrika;

import androidx.appcompat.app.AppCompatActivity;

import android.annotation.TargetApi;
import android.os.Build;
import android.os.Bundle;
import android.webkit.WebResourceRequest;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;

public class MainActivity extends AppCompatActivity {


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    getSupportActionBar().hide();
    WebView webView = findViewById(R.id.webView);
    webView.getSettings().setJavaScriptEnabled(true);
    webView.getSettings().setBuiltInZoomControls(false);
    webView.getSettings().setSupportZoom(false);
    webView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
    webView.getSettings().setAllowFileAccess(true);
    webView.getSettings().setDomStorageEnabled(true);
    webView.getSettings().setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);
    webView.loadUrl("https://evrikaspace.ru/");


    WebViewClient webViewClient = new WebViewClient() {
    @SuppressWarnings("deprecation") @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
        view.loadUrl(url);
        return true;
    }
    @TargetApi(Build.VERSION_CODES.N) @Override
    public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
        view.loadUrl(request.getUrl().toString());
        return true;
        }
    };
    webView.setWebViewClient(webViewClient);
}
}

---

可能这行代码发出噪音

getSupportActionBar（）.hide（）
您是否在logcat中看到任何错误？可能此行发出噪音
getSupportActionBar（）.hide（）
你能澄清一下“它刚刚关闭”是什么意思吗？@isthemartin是的，这就是问题所在，谢谢！我将把我的评论作为回答