Javascript Android WebView不显示HTML字符串中的图像

我正在尝试使用Android WebView加载“网页”，但无法加载图像。首先，我检索一个以Markdown格式格式化的文本字符串。之后，我使用Markdown4J将标记转换为HTML，然后使用Android WebView的loadDataWithBaseUrl（）函数，用HTML加载WebView

String html = null;
        try {
            html = new Markdown4jProcessor().process(mText);
        } catch (IOException e) {
            e.printStackTrace();
        }
        String css = "<link rel=\"stylesheet\" type=\"text/css\" href=\"blogstyle.css\" />";
        final String htmlData = css + html;
body.loadDataWithBaseURL("file:///android_asset/", htmlData, "text/html", "UTF-8", null);

就这些。只需导入html并使用自定义元素！使用一个名为shadowdom的新模板系统，浏览器持有一个名为githubcard的模板，其中包含封装的样式和JavaScript。这样，即使有同名的元素，也不会发生任何冲突。当然，您可以在任何地方使用github卡标签，次数可以根据您的需要而定，并且数据不会传输

另一方面，如果您正在创建一个web组件，您可以轻松地添加任意多个自定义字段，以允许用户在特定位置修改您的组件。例如，简化的Google地图组件就是这样的：

googlemapslatude=\“30.686603\”经度=\“-88.046224\”/googlemaps

一个复杂的谷歌地图组件如下所示：

正如您所看到的，这确实是一个从事web开发的好时机。随着我们越来越接近HTML5的真正实现和统一的多平台体验，复杂的过程每天都在变得更好、更容易，而web组件正是这一进步的先锋。留心下一件大事——它会在你意识到之前就出现了

克里斯托弗·约翰逊
Jr.助理程序员“

---

您不必显示/告诉您是如何访问htmlData的。相反，您应该显示htmlData的内容。您是否在清单中请求了internet权限？请在此处的代码块中发布完整的html源代码。正如您所看到的，这在评论中是不可读的。我已经这样做了，您知道有什么问题吗？对于insta来说，这不是一个有效的html页面nce标记丢失。请提供一个最低限度的有效html页面来演示此问题。

<img src="https://www.random.org/analysis/randbitmap-rdo.png">

"One of the huge problems today with web development is that it isn’t modular; because of how CSS and HTML work, it’s extremely difficult to just drag and drop an element from one site into another without some very strange side-effects. Shape and size can be different, resources can fail to load based on relative paths, and you have to import at least a .html, .css and .js file for each element. Even with all that, there’s no guarantee you won’t have CSS or JavaScript collisions.\n\n \n\nThe solution to this problem? [**Web Components**](http://webcomponents.org/). Now you should know up front that Web Components don’t work in IE and Safari, but they *are* under development.\n\n \n\nSo, what are web components? Well, essentially, they are plug-n-play modules for the web. The picture here is actually a great example. If you’re familiar with web design, imagine how long this would take to make, even statically. You’d have to position the images, set the roundness, give a height to the three main elements, set the font colors… Basically, it’d take you more than five minutes to get this up-and-running.\n\n![blog-image](https://www.ruralsourcing.com/wp-content/uploads/2014/09/blog-image-265x300.png)\n\nSo what if I told you *all the code for what you see is two lines?* Just these two:\n\n \n\n\n    <linkref=\"import\"href=\"gitcard.html\">\n    <github-carduser=\"nasawa\">\n\n\nAnd that’s all. Just import the html and use the custom element! Using a new templating system called *Shadow DOM*, the browser holds a template called *github-card* with encapsulated styles and JavaScript. This way, even if you have elements named the same, there will never be any collision. And of course, you can have the *github-card* tag wherever you want, as many times as you want, and data will not transfer over.\n\n \n\nOn the other end, if you’re creating a web component, you can easily add as many customizable fields as you want to allow the user to modify your component at specific spots. For example, this is what the simplified Google Maps component looks like:\n\n \n\n\n`<google-mapslatitude=\"30.686603\"longitude=\"-88.046224\"></google-maps>`\n \n\nAnd a complicated Google Maps component looks like this:\n\n\n    <google-maplatitude=\"37.77493\"longitude=\"-122.41942\"fitToMarkers>\n    <google-map-markerlatitude=\"37.779\"longitude=\"-122.3892\"\n    draggable=\"true\"title=\"Go Giants!\"></google-map-marker>\n    <google-map-markerlatitude=\"37.777\"longitude=\"-122.38911\"></google-map-marker>\n    </google-map>\n\n\n \n\nAs you can see, it is truly a great time to be in web development. Complex procedures are getting better and easier every day as we push closer to a true implementation of HTML5 and a unified multiplatform experience, and web components are a spearhead on that advancement. Look out for the next big thing – it’ll be here before you know it!\n\n \n\nChristopher Johnson  \n Jr. Associate Programmer"

<p>"One of the huge problems today with web development is that it isn’t modular; because of how CSS and HTML work, it’s extremely difficult to just drag and drop an element from one site into another without some very strange side-effects. Shape and size can be different, resources can fail to load based on relative paths, and you have to import at least a .html, .css and .js file for each element. Even with all that, there’s no guarantee you won’t have CSS or JavaScript collisions.</p>

<p> </p>

<p>The solution to this problem? <a href="http://webcomponents.org/"><strong>Web Components</strong></a>. Now you should know up front that Web Components don’t work in IE and Safari, but they <em>are</em> under development.</p>

<p> </p>

<p>So, what are web components? Well, essentially, they are plug-n-play modules for the web. The picture here is actually a great example. If you’re familiar with web design, imagine how long this would take to make, even statically. You’d have to position the images, set the roundness, give a height to the three main elements, set the font colors… Basically, it’d take you more than five minutes to get this up-and-running.</p>

<p><img src="https://www.ruralsourcing.com/wp-content/uploads/2014/09/blog-image-265x300.png" alt="blog-image" title="" /></p>

<p>So what if I told you <em>all the code for what you see is two lines?</em> Just these two:</p>

<p> </p>

<pre><code>&lt;linkref=\"import\"href=\"gitcard.html\"&gt;
&lt;github-carduser=\"nasawa\"&gt;
</code></pre>

<p>And that’s all. Just import the html and use the custom element! Using a new templating system called <em>Shadow DOM</em>, the browser holds a template called <em>github-card</em> with encapsulated styles and JavaScript. This way, even if you have elements named the same, there will never be any collision. And of course, you can have the <em>github-card</em> tag wherever you want, as many times as you want, and data will not transfer over.</p>

<p> </p>

<p>On the other end, if you’re creating a web component, you can easily add as many customizable fields as you want to allow the user to modify your component at specific spots. For example, this is what the simplified Google Maps component looks like:</p>

<p> </p>

<p><code>&lt;google-mapslatitude=\"30.686603\"longitude=\"-88.046224\"&gt;&lt;/google-maps&gt;</code>
 </p>

<p>And a complicated Google Maps component looks like this:</p>

<pre><code>&lt;google-maplatitude=\"37.77493\"longitude=\"-122.41942\"fitToMarkers&gt;
&lt;google-map-markerlatitude=\"37.779\"longitude=\"-122.3892\"
draggable=\"true\"title=\"Go Giants!\"&gt;&lt;/google-map-marker&gt;
&lt;google-map-markerlatitude=\"37.777\"longitude=\"-122.38911\"&gt;&lt;/google-map-marker&gt;
&lt;/google-map&gt;
</code></pre>

<p> </p>

<p>As you can see, it is truly a great time to be in web development. Complex procedures are getting better and easier every day as we push closer to a true implementation of HTML5 and a unified multiplatform experience, and web components are a spearhead on that advancement. Look out for the next big thing – it’ll be here before you know it!</p>

<p> </p>

<p>Christopher Johnson <br />
 Jr. Associate Programmer"</p>