webview-upgrade/app/src/main/java/com/norman/webviewup/demo/WebViewActivity.java

package com.norman.webviewup.demo;

import android.Manifest;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.DownloadManager;
import android.content.Context;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.webkit.CookieManager;
import android.webkit.URLUtil;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Toast;

import androidx.annotation.RequiresApi;
import androidx.core.app.ActivityCompat;



public class WebViewActivity extends Activity {

    private final int STORAGE_PERMISSION_CODE = 1;
    private WebView mWebView;
    private void requestStoragePermission() {
        if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.READ_EXTERNAL_STORAGE)) {
            new AlertDialog.Builder(this)
                    .setTitle("Permission needed")
                    .setMessage("This permission is needed to download files")
                    .setPositiveButton("ok", (dialog, which) -> ActivityCompat.requestPermissions(WebViewActivity.this,
                            new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, STORAGE_PERMISSION_CODE))
                    .setNegativeButton("cancel", (dialog, which) -> dialog.dismiss())
                    .create().show();
        } else {
            ActivityCompat.requestPermissions(this,
                    new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, STORAGE_PERMISSION_CODE);
        }
    }

    @RequiresApi(api = Build.VERSION_CODES.Q)
    @Override
    @SuppressLint("SetJavaScriptEnabled")
    protected void onCreate(Bundle savedInstanceState) {
        requestStoragePermission();
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_webview);
        mWebView = findViewById(R.id.webview);
//        mWebView.setWebViewRenderProcessClient();
//        mWebView.getWebViewLooper()
        WebSettings webSettings = mWebView.getSettings();
        String userAgentString = webSettings.getUserAgentString();
        Log.v("webview", "userAgentString" + userAgentString);
        webSettings.setJavaScriptEnabled(true);
        mWebView.setWebViewClient(new HelloWebViewClient());
        mWebView.setDownloadListener((url, userAgent, contentDisposition, mimeType, contentLength) -> {
            Uri source = Uri.parse(url);
            DownloadManager.Request request = new DownloadManager.Request(source);
            String cookies = CookieManager.getInstance().getCookie(url);
            request.addRequestHeader("cookie", cookies);
            request.addRequestHeader("User-Agent", userAgent);
            request.setDescription("Downloading File...");
            request.setTitle(URLUtil.guessFileName(url, contentDisposition, mimeType));
            request.allowScanningByMediaScanner();
            request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
            request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, URLUtil.guessFileName(url, contentDisposition, mimeType));
            DownloadManager dm = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
            dm.enqueue(request);
            Toast.makeText(getApplicationContext(), "Downloading File", Toast.LENGTH_LONG).show();
        });
        mWebView.loadUrl("https://test-videos.co.uk/bigbuckbunny/mp4-h265"); //Replace The Link Here


    }

    private static class HelloWebViewClient extends WebViewClient {
        @Override
        public boolean shouldOverrideUrlLoading(final WebView view, final String url) {
//            view.loadUrl(url);
            return false;
        }

        @Override
        public void onPageStarted(WebView view, String url, Bitmap favicon) {
            super.onPageStarted(view, url, favicon);
        }

        @Override
        public void onPageFinished(WebView view, String url) {
            super.onPageFinished(view, url);
        }
    }

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

}