Question

我试图将包含图像的数据库中存储的html字符串加载到WebView中。图像存储在内部存储器中。我正在引用html字符串。但它不起作用。有什么帮助吗？

String content="<p>Can we have a rotational" +
    " symmetry of order more than 1 whose angle of rotation is&nbsp;</p>\n" +
    "\n <p>(i)&nbsp;<img alt=\"45\\degree\" src=\"file:///storage/emulated/01484890695248.jpg\" /></p>\n" +
    "\n<p>(ii)&nbsp;<img alt=\"35\\degree\" src=\"file:///storage/emulated/01484890697301.jpg\" /></p>";

WebView00.loadDataWithBaseURL("", content, "text/html","UTF-8", "");
WebView00.getSettings();

Answer 1

试试这个

String base = Environment.getExternalStorageDirectory().getAbsolutePath().toString();
String imagePath = "file://"+ base + "/image_name.jpg";
String html = "<html><head></head><body> <img src=\""+ imagePath + "\"> </body></html>";
webView.loadDataWithBaseURL("", html, "text/html","utf-8", "");

Answer 2

将图像放入assets文件夹。然后使用相应的前缀

file:///android_asset/

Answer 3

问题出在文件路径

中

file:///storage/emulated/01484890695248.jpg

将是

file:///storage/emulated/0/01484890695248.jpg

感谢@Charuක寻求帮助..

Answer 4

在最新的 android 版本中，我们无法访问诸如 assets 之类的资源，存储中的文件。 https://developer.android.com/reference/androidx/webkit/WebViewAssetLoader 是继续操作的最佳指南。 WebViewAssetLoader 及其内部类有助于访问它们。

您可以查看以下示例代码。

    final WebViewAssetLoader assetLoader = new WebViewAssetLoader.Builder()
            .addPathHandler("/assets/", new WebViewAssetLoader.AssetsPathHandler(this)) //****for assets****
            .addPathHandler("/images/", new WebViewAssetLoader.InternalStoragePathHandler(context, getFilesDir()))//****for files****
            .build();

    webView.setWebViewClient(new WebViewClient() {
        @Override
        public WebResourceResponse shouldInterceptRequest(WebView view,
                                                          WebResourceRequest request) {
            return assetLoader.shouldInterceptRequest(request.getUrl());
        }
    });

    String assetsPic = "<img width='42px' height='58px' src='https://appassets.androidplatform.net/assets/pic.png'/>";
    String storagePic = "<img width='42px' height='58px' src='https://appassets.androidplatform.net/images/pic.jpg'/>";
    webView.loadData(assetsPic+"<br>"+storagePic, "text/html", "UTF-8");

如何在Android WebView中加载本地图像

4 个答案: