app/src/main/java/com/example/lab_9/WebBrowserActivity.java - master - Kulechek/Lab_9

app/src/main/java/com/example/lab_9/WebBrowserActivity.java
73 строки2 KB
Temnikov Konstantin
25 апр 2025, 14:37
25 апр 2025, 14:37ca2a451
package com.example.lab_9;

import android.net.http.SslError;
import android.os.Bundle;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
import android.webkit.SslErrorHandler;
import android.webkit.WebResourceRequest;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;

public class WebBrowserActivity extends AppCompatActivity {
    private WebView webView;
    private static final String EXTRA_URL = "url";

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_web_browser);
        initWebView();
        loadInitialUrl();
    }

    private void initWebView() {
        webView = findViewById(R.id.webView);
        WebSettings settings = webView.getSettings();
        settings.setJavaScriptEnabled(true);
        settings.setDomStorageEnabled(true);
        settings.setLoadWithOverviewMode(true);
        settings.setUseWideViewPort(true);
        settings.setBuiltInZoomControls(true);
        settings.setDisplayZoomControls(false);
        settings.setCacheMode(WebSettings.LOAD_DEFAULT);

        webView.setWebViewClient(new SecureWebViewClient());
    }

    private void loadInitialUrl() {
        String url = getIntent().getStringExtra(EXTRA_URL);
        if (url == null || url.isEmpty()) {
            finish();
        } else {
            webView.loadUrl(url.trim());
        }
    }

    @Override
    public void onBackPressed() {
        if (webView.canGoBack()) {
            webView.goBack();
        } else {
            super.onBackPressed();
        }
    }

    /**
     * Пользовательский WebViewClient для безопасной обработки ошибок SSL и загрузки URL-адресов.
     */
    private static class SecureWebViewClient extends WebViewClient {
        @Override
        public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
            handler.proceed();
        }

        @Override
        public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
            String url = request.getUrl().toString();
            view.loadUrl(url);
            return true;
        }
    }
}