Android 中的 PdfConverter 不会加载本地图像
[英]PdfConverter in Android won't load local images
问题描述
I'm trying to generate a pdf from HTML code using images stored in memory.
我正在尝试使用存储在 memory 中的图像从 HTML 代码生成 pdf。 The URIs are correct and the files exist. URI 正确且文件存在。 With WebView, we can use webView.getSettings().setAllowFileAccess(true);使用 WebView，我们可以使用webView.getSettings().setAllowFileAccess(true); in order to allow it to access files to manage them properly but, when it comes to PdfConverter , it seems like there is no option to allow access to files and, thereby, the images don't appear at all in the pdf generated.为了允许它访问文件以正确管理它们，但是当涉及到PdfConverter时，似乎没有允许访问文件的选项，因此，图像根本不会出现在生成的 pdf 中。 The PdfConverter uses a WebView and I tried to add the prior line of code to it, but it didn't do the trick. PdfConverter 使用 WebView，我尝试将前面的代码行添加到它，但它没有成功。
What's the workaround for this?解决方法是什么？
private void shareOrder(String html) {
PdfConverter converter = PdfConverter.getInstance();
String fileName = "foo.pdf"
File file = new File(getCacheDir(), fileName);
converter.convert(this, html, file);
Intent shareIntent = new Intent();
Uri uri = FileProvider.getUriForFile(this, BuildConfig.APPLICATION_ID + ".provider", file);
if (uri != null) {
shareIntent.setAction(Intent.ACTION_SEND);
shareIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION); // temp permission for receiving app to read this file
shareIntent.setDataAndType(uri, getContentResolver().getType(uri));
shareIntent.putExtra(Intent.EXTRA_STREAM, uri);
startActivity(Intent.createChooser(shareIntent, getResources().getString(R.string.send_to)));
} else {
Log.e("PreviewOrder", "URI not found");
}
send(true);
finish();
}
HTML to be converted (keep in mind that the APPLICATION_ID is the package name of the actual project):要转换的 HTML （请记住，APPLICATION_ID 是实际项目的 package 名称）：
<!DOCTYPE html>
<html>
<head>
<tr>
<td width='100%' colspan='1' style='padding: 10px 0px;'>
<h3 style='position: absolute; top: -10px; color:red;'>Draft</h3>
</td>
<td width='100%' colspan='1' style='padding: 10px 0px;'>
<p align='right' style='position: relative;'>Generated by <a target='_blank' href='https://example.com/'><b>https://example.com/</b></a></p>
</td>
</tr>
<img
style='height:auto;max-width:150px;' src='file:///data/user/0/[APPLICATION_ID]/cache/orders_logo.jpg' onerror='this.style.display = \"none\"'>
<div style='font-size:25px;font-weight: bold;'>Company name</div>
</head>
<body>
<table width='100%'>
<tbody>
<tr>
<td width='100%' colspan='2'>
<hr style='border-color:black; border-width: 2px;'>
</td>
</tr>
<tr>
<td width='100%' colspan='2' style='padding: 10px 0px;'>COMPANY</td>
</tr>
<tr style="background-color:LightGray;">
<td width='100%' style='border-bottom: 1px solid black;font-weight:bold;' colspan='2'>Order Details</td>
</tr>
<tr>
<td width='100%' colspan='2'> </td>
</tr>
<tr>
<td width='50%'>Client:</td>
<td width='50%' style='font-weight:bold;'>CLIENT</td>
</tr>
<tr>
<td width='50%'>Date:</td>
<td width='50%' >DATE</td>
</tr>
<tr>
<td width='50%'>User:</td>
<td width='50%'>(44) <b>USER</b></td>
</tr>
<tr>
<td width='50%' style='vertical-align: top;'>Address:</td>
<td width='50%' id='dir'>ADDRESS</td>
</tr>
<tr>
<td width='50%' style='vertical-align:top;'>Map:</td>
<td width='50%'><a target='_blank' href='https://www.google.com/maps?q=0,0'><img width='100%' style='margin-top: 5px; max-width: 300px; height: auto;' src='file:///data/user/0/[APPLICATION_ID]/cache/map.png'></a></td>
</tr>
<tr>
<td width="50%">Client Id: </td>
<td width="50%">ID</td>
</tr>
<tr>
<td> </td>
<td> </td>
</tr>
<tr style="background-color:LightGray;">
<td width='100%' style='border-bottom: 1px solid black;font-weight:bold;' colspan='2'>Products details</td>
</tr>
<tr>
<td width='100%' colspan='2'> </td>
</tr>
<tr>
<td colspan='2'>
<table border='1' style='border-spacing:0px;border-collapse: collapse;' cellspacing='0'cellpadding='0' width='100%'>
<thead>
<tr>
<th width='10%'>SKU</th>
<th width='40%'>Product name</th>
<th width='25%'>Price</th>
<th width='10%'>Quantity</th>
<th width='10%'>Discount</th>
<th width='25%'>Total price</th>
</tr>
</thead>
<tbody>
<tr>
<td>ID</td>
<td>PRODUCT</td>
<td align="center">PRICE</td>
<td align="center">QUANTITY</td>
<td align="center">DISCOUNT</td>
<td align="right">TOTAL</td>
</tr>
</tbody>
</table>
</td>
</tr>
<tr>
<td width='20%'>Total:</td>
<td width='10%' style='text-align:right;'>Total: 989.85 €</td>
</tr>
<tr>
<td width='50%' style='vertical-align:top;'> </td>
</tr>
</tbody>
</table>
</body>
</html>
1 个解决方案
解决方案1
0 2022-01-21 10:50:08
I managed to fix it implementing these two dependencies:我设法修复它实现这两个依赖项：
implementation 'com.tom-roush:pdfbox-android:1.8.10.3'
implementation 'com.facebook.react:react-native:+'
Then, in the PdfConverter class, I replaced the one that I took from the link indicated in my question by this one .然后，在PdfConverter class 中，我用这个替换了我从问题中指出的链接中获取的那个。
To convert the HTML to pdf, I did the following:要将 HTML 转换为 pdf，我执行了以下操作：
PdfConverter converter = PdfConverter.getInstance();
String fileName = "foo.pdf";
File file = new File(getCacheDir(), fileName);
try {
converter.convert(this, html, file, true, null, null, null);
} catch (Exception e) {
Log.e(TAG, "Conversion of HTML to PDF unsuccessful");
}
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