Android WebView evaluateJavascript返回空值/空列表，Node.js脚本正常

我在Android WebView中执行两段evaluateJavascript代码，一段返回Null值，另一段在列表长度不大于0时返回空列表；但在Windows本地机器的PowerShell中运行基于Puppeteer的Node.js脚本时，两段逻辑均能正常输出结果。

Android代码 #

public void ProfileData(String url, AllMediaCallback callback) {
        final ArrayList<String>[] arrayOfLists = new ArrayList[3]; // Change the size to match the number of lists you need
        arrayOfLists[0] = new ArrayList<>(); // Initialize the first ArrayList
        arrayOfLists[1] = new ArrayList<>(); // Initialize the second ArrayList
        arrayOfLists[2] = new ArrayList<>(); // Initialize the third ArrayList
        AtomicInteger evaluationCounter = new AtomicInteger(); // Define the evaluationCounter here
        ExecutorService executor = Executors.newSingleThreadExecutor();
        Handler handler = new Handler(Looper.getMainLooper());
        webView.loadUrl(url);
        // Delayed operation
        webView.setWebViewClient(new WebViewClient() {
            @Override
            public void onPageFinished(WebView view, String url) {
                new Handler().postDelayed(() -> webView.evaluateJavascript("javascript: " +
                        "    const pressableContainers = document.querySelectorAll('data-pressable-container=\"true\"');\n" +
                        "    const profileImgUrls = [];\n" +
                        "    pressableContainers.forEach(container => {\n" +
                        "        const draggables = container.querySelectorAll('draggable=\"false\"');\n" +
                        "        draggables.forEach(draggable => {\n" +
                        "            const srcValue = draggable.getAttribute('src');\n" +
                        "            profileImgUrls.push(srcValue);\n" +
                        "        });\n" +
                        "    });\n" +
                        "    \n" +
                        "    profileImgUrls;", value -> {


                    Collections.addAll(arrayOfLists[0], value);
                    // Increase the evaluation counter
                    evaluationCounter.getAndIncrement();

                    // Check if both evaluations are done
                    if (evaluationCounter.get() == 3 && callback != null) {
                        callback.onAllMediiaStatusRecived(arrayOfLists);
                    }

                }), 2000);

                new Handler().postDelayed(() ->  webView.evaluateJavascript(
                        "javascript: " +
                                "    const pressableContainers = document.querySelectorAll('data-pressable-container=\"true\"');\n" +
                                "    const profileImgUrls = [];\n" +
                                "    pressableContainers.forEach(container => {\n" +
                                "        const videos = container.querySelectorAll('video');\n" +
                                "        \n" +
                                "        videos.forEach(video => {\n" +
                                "            const srcValue = video.getAttribute('src');\n" +
                                "            profileImgUrls.push(srcValue);\n" +
                                "        });\n" +
                                "    });\n" +
                                "    \n" +
                                "    profileImgUrls;", value -> {


                    Collections.addAll(arrayOfLists[1], value);
                    // Increase the evaluation counter
                    evaluationCounter.getAndIncrement();

                    // Check if both evaluations are done
                    if (evaluationCounter.get() == 3 && callback != null) {
                        callback.onAllMediiaStatusRecived(arrayOfLists);
                    }

                }), 2000);

               // Ignore this one its not related to evaluatejavascript 
                executor.execute(new Runnable() {
                    @Override
                    public void run() {

                        try {
                            Document document = Jsoup.connect(url).get();
                            Elements metaTags = document.getElementsByTag("meta");

                            for (Element metaTag : metaTags) {
                                String property = metaTag.attr("property");
                                String content = metaTag.attr("content");

                                if (property.equals("og:description")) {
                                    arrayOfLists[2].add(content);
                                }

                                if (property.equals("og:image")) {
                                    content = content.replace("&amp;", "&");
                                    arrayOfLists[2].add(content);
                                }
                            }
                        } catch (IOException e) {
                            e.printStackTrace();
                        }

                        handler.post(() -> {
                            // Increase the evaluation counter
                            evaluationCounter.getAndIncrement();

                            // Check if both evaluations are done
                            if (evaluationCounter.get() == 3 && callback != null) {
                                callback.onAllMediiaStatusRecived(arrayOfLists);
                            }
                        });
                    }
                });


            }
        });


    }


    public interface AllMediaCallback {
    void onAllMediiaStatusRecived(ArrayList<String>[] ArrayOfLists);
}

 ProfileData(linkUrl, new AllMediaCallback() {
                @Override
                public void onAllMediiaStatusRecived(ArrayList<String>[] ArrayOfLists) {
                
                    if (ArrayOfLists[0].size() > 0) {
                        for (String strImage : ArrayOfLists[0]) {
                            Toast.makeText(getApplicationContext(), strImage, Toast.LENGTH_SHORT).show();
                        }
                    } else {
                        Toast.makeText(getApplicationContext(), "Empty List[0]", Toast.LENGTH_SHORT).show();
                    }

                    if (ArrayOfLists[1].size() > 0) {
                        for (String strImage : ArrayOfLists[1]) {
                            Toast.makeText(getApplicationContext(), strImage, Toast.LENGTH_SHORT).show();
                        }

                    } else {
                        Toast.makeText(getApplicationContext(), "Empty List[1]", Toast.LENGTH_SHORT).show();
                    }


                }
            });

Image.js #

const puppeteer = require('puppeteer');

(async () => {
  const browser = await puppeteer.launch();
  const page = await browser.newPage();

  // Replace 'your_url_here' with the actual URL you want to load
  await page.goto('https://www.threads.net/@sagar_v_raval');

  // Wait for the content to load (you might need to adjust the selector and waiting time)
  await page.waitForSelector('[data-pressable-container="true"]');

  const srcValues = await page.evaluate(() => {
    const pressableContainers = document.querySelectorAll('[data-pressable-container="true"]');
    const srcValues = [];

    pressableContainers.forEach(container => {
      const draggables = container.querySelectorAll('[draggable="false"]');
      
      draggables.forEach(draggable => {
        const srcValue = draggable.getAttribute('src');
        srcValues.push(srcValue);
      });
    });

    return srcValues;
  });

  console.log(srcValues);

  await browser.close();
})();

Video.js #

const puppeteer = require('puppeteer');

(async () => {
  const browser = await puppeteer.launch({ headless: 'new' });
  const page = await browser.newPage();

  // Replace 'your_url_here' with the actual URL you want to load
  await page.goto('https://www.threads.net/@sagar_v_raval');

  // Wait for the content to load (you might need to adjust the selector and waiting time)
  await page.waitForSelector('[data-pressable-container="true"]');

  const srcValues = await page.evaluate(() => {
    const pressableContainers = document.querySelectorAll('[data-pressable-container="true"]');
    const srcValues = [];

    pressableContainers.forEach(container => {
      const videos = container.querySelectorAll('video'); // Select video elements with the 'video-class' class
      
      videos.forEach(video => {
        const srcValue = video.getAttribute('src');
        srcValues.push(srcValue);
      });
    });

    return srcValues;
  });

  console.log(srcValues);

  await browser.close();
})();

内容的提问来源于stack exchange，提问作者Vasant Raval