Java 在WebView android中单击链接时显示pdf

我正在使用Web视图在我的应用程序中显示一个站点，该站点包含指向PDF文件的链接。但当按下此链接时，Web视图将显示一个空白页面，而不是PDF文件。我能让它正确显示PDF文件吗

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提前感谢。

您可以创建打开pdf文件的意图：

@Override
public boolean launchPDF(WebView view, String url) {
    if ( urlIsPDF(url)){
        Intent intent = new Intent(Intent.ACTION_VIEW);
        intent.setDataAndType(Uri.parse(url), "application/pdf");
        try{
            view.getContext().startActivity(intent);
        } catch (ActivityNotFoundException e) {
            //user does not have a pdf viewer installed
        }
    } else {
        webview.loadUrl(url);
    }
    return true;
}

然后，每当用户单击webview中页面中的PDF链接时，该文件将在外部PDF应用程序中打开

或者您可以使用谷歌文档来启动它们：

String googleDocs = "https://docs.google.com/viewer?url=";
String pdf_url = "http://www.somedomain.com/new.pdf";  

webView.loadUrl(googleDocs + pdf_url);

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请记住使用Internet权限。

易于选择的doc/pdf等

public static void openFile(Context context, String url) throws IOException {
    // Create URI
    Uri uri = Uri.parse(url);

    Intent intent = new Intent(Intent.ACTION_VIEW);
    // Check what kind of file you are trying to open, by comparing the url with extensions.
    // When the if condition is matched, plugin sets the correct intent (mime) type,
    // so Android knew what application to use to open the file
    if (url.toString().contains(".doc") || url.toString().contains(".docx")) {
        // Word document
        intent.setDataAndType(uri, "application/msword");
    } else if(url.toString().contains(".pdf")) {
        // PDF file
        intent.setDataAndType(uri, "application/pdf");
    } else if(url.toString().contains(".ppt") || url.toString().contains(".pptx")) {
        // Powerpoint file
        intent.setDataAndType(uri, "application/vnd.ms-powerpoint");
    } else if(url.toString().contains(".xls") || url.toString().contains(".xlsx")) {
        // Excel file
        intent.setDataAndType(uri, "application/vnd.ms-excel");
    } else if(url.toString().contains(".zip") || url.toString().contains(".rar")) {
        // WAV audio file
        intent.setDataAndType(uri, "application/x-wav");
    } else if(url.toString().contains(".rtf")) {
        // RTF file
        intent.setDataAndType(uri, "application/rtf");
    } else if(url.toString().contains(".wav") || url.toString().contains(".mp3")) {
        // WAV audio file
        intent.setDataAndType(uri, "audio/x-wav");
    } else if(url.toString().contains(".gif")) {
        // GIF file
        intent.setDataAndType(uri, "image/gif");
    } else if(url.toString().contains(".jpg") || url.toString().contains(".jpeg") || url.toString().contains(".png")) {
        // JPG file
        intent.setDataAndType(uri, "image/jpeg");
    } else if(url.toString().contains(".txt")) {
        // Text file
        intent.setDataAndType(uri, "text/plain");
    } else if(url.toString().contains(".3gp") || url.toString().contains(".mpg") || url.toString().contains(".mpeg") || url.toString().contains(".mpe") || url.toString().contains(".mp4") || url.toString().contains(".avi")) {
        // Video files
        intent.setDataAndType(uri, "video/*");
    } else {
        //if you want you can also define the intent type for any other file

        //additionally use else clause below, to manage other unknown extensions
        //in this case, Android will show all applications installed on the device
        //so you can choose which application to use
        intent.setDataAndType(uri, "*/*");
    }

    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    context.startActivity(intent);
}

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我敢肯定，即使在Android上，你也需要某种插件来显示PDF。通常，设备会询问用户想要使用什么来查看它。我不知道是否有一种无缝的方式将其写入webview。webview不显示PDF。谢谢。这真的很有帮助。SPDF没有被认可，我需要包括什么