实施机器人pdf.js从SD卡读取 [英] Implementing pdf.js in android to read from sd card
问题描述
我想实现一个PDF浏览器为我的Android应用程序而显示不同的PDF文件这是在SD卡present。
I'm trying to implement a pdf viewer for my android app which displays different pdf files which are present in the SD card.
我想用pdf.js的library.I使用code作为样本张贴在这里： https://bitbucket.org/butelo/pdfviewer/
I am thinking of using the pdf.js library.I used the code sample as posted here: https://bitbucket.org/butelo/pdfviewer/
不过，库会在JavaScript文件中的PDF URL是相对地址的文件夹它所属（/资产/ PDF查看器）。
However, the library takes the pdf url in the javascript file which is relative address to the folder to which it belongs (/assets/pdfviewer).
<script type="text/javascript">
var url = '../compressed.tracemonkey-pldi-09.pdf';
</script>
我
如何可以重定向它在SD卡使用PDF present文件夹中？
How can I redirect it to use a pdf present in a folder in the sdcard ?
另外，PDF的文件名不是固定的，我需要改变他们的计划按要求。
Also the filenames of the pdfs are not fixed and I need to change them in the program as per requirement.
更新--------------------------------------------------------------------------------------------------------------------------
Update --------------------------------------------------------------------------------------------------------------------------
我更新了Java code是这样的：
I updated the java code like this:
Uri path = Uri.parse(Environment.getExternalStorageDirectory().toString() + "/data/test.pdf");
webView.loadUrl("file:///android_asset/pdfviewer/index.html?file=" + path);
在pdffile.js，我修改了以下内容：
In the pdffile.js, I modified the following:
从：
<script type="text/javascript">
var url = '../compressed.tracemonkey-pldi-09.pdf';
</script>
要：
var url = getURLParameter('file');
function getURLParameter(name) {
return decodeURIComponent((new RegExp('[?|&]' + name + '=' + '([^&;]+?)(&|#|;|$)').exec(location.search)||[,""])[1].replace(/\+/g, '%20'))||null}
以上的JavaScript code从提取的URL的'文件'参数'的index.html
The above javascript code extracts the 'file' parameter from the URL of the 'index.html'
还不行。 web视图中的logcat显示'铬'：
Still does not work. The webview 'chromium' in logcat shows:
I/chromium(1353): [INFO:CONSOLE(106)] "Warning: Unhandled rejection:
Unexpected server response (0) while retrieving PDF "file:///storage/sdcard0/data/test.pdf".", source: file:///android_asset/pdfviewer/pdf.js (106)"
这似乎是跨服务器的问题。所以，我怎么可以修改pdf.js code读取本地文件，而无需服务器？
This seems to be cross server issue. So how can I modify the pdf.js code to read local files without server ?
推荐答案
解决这个问题，该应用程序缺少 READ_EXTERNAL_STORAGE 的权限。
Solved the issue. The app was missing READ_EXTERNAL_STORAGE permissions.
在code可以在这里找到Android的pdf.js
它的Apache V2许可证，可以随意在你的应用程序中使用。
The code can be found at: https://github.com/pauldmps/Android-pdf.js Its Apache V2 license, so feel free to use in your app.
这篇关于实施机器人pdf.js从SD卡读取的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
