Android:使用谷歌驱动器 View 在 webview 中打开 pdf 时出现奇怪的错误

Question

我正在尝试使用以下代码在 WebView 中打开 PDF:

    webView = (WebView) findViewById(R.id.web_view_container);
    webView.getSettings().setJavaScriptEnabled(true);
    webView.getSettings().setPluginState(WebSettings.PluginState.ON);

    webView.loadUrl("https://docs.google.com/gview?embedded=true&url=http://www.adobe.com/products/pdfjobready/pdfs/pdftraag.pdf");

WebView 从 google 文档查看器加载工具栏，加载正确数量的页面，但不显示 pdf 中的任何内容。 (屏幕闪烁 1 或 2 次)。

在日志中我看到了一些奇怪的信息:

[INFO:CONSOLE(6)] "Viewport argument value "1.0;" for key "initial-scale" was truncated to its numeric prefix. Note that ';' is not a separator in viewport values. The list should be comma-separated."
[INFO:CONSOLE(6)] "Viewport argument value "1.0;" for key "maximum-scale" was truncated to its numeric prefix. Note that ';' is not a separator in viewport values. The list should be comma-separated."
[INFO:CONSOLE(6)] "Viewport argument value "no;" for key "user-scalable" is invalid, and has been ignored. Note that ';' is not a separator in viewport values. The list should be comma-separated."
[INFO:async_pixel_transfer_manager_android.cc(56)] Async pixel transfers not supported                                                                                                                  
[INFO:async_pixel_transfer_manager_android.cc(56)] Async pixel transfers not supported

知道发生了什么事吗？

Answer 1

无论在该 web View 中加载什么页面，它都包含语法无效的元标记。可能使用 ; 作为分隔符而不是 , 来自错误...参见 http://alxgbsn.co.uk/2011/11/23/make-sure-to-use-correct-meta-viewport-syntax/获取更多信息。