我正在 webview
中显示网页。现在如何从 webview 创建 PDF?
例如:webview 加载的 URL 是 "www.google.co.in"
。现在如何将此网页保存为图像并创建 PDF?
任何帮助都将不胜感激
我正在 webview
中显示网页。现在如何从 webview 创建 PDF?
例如:webview 加载的 URL 是 "www.google.co.in"
。现在如何将此网页保存为图像并创建 PDF?
任何帮助都将不胜感激
试试这样做
WebView内置了一个名为setPictureListener
的方法,可以按照以下方式使用该方法
webView1.setPictureListener(new PictureListener() {
public void onNewPicture(WebView view, Picture picture) {
if (picture != null) {
try {
bmp = pictureDrawable2Bitmap(new PictureDrawable(
picture));
} catch (Exception e) {
e.printStackTrace();
}
}
}
});
我使用了pictureDrawable2Bitmap
来获取位图,以下是相应的代码:
private static Bitmap pictureDrawable2Bitmap(PictureDrawable pictureDrawable) {
Bitmap bitmap = Bitmap.createBitmap(
pictureDrawable.getIntrinsicWidth(),
pictureDrawable.getIntrinsicHeight(), Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
canvas.drawPicture(pictureDrawable.getPicture());
return bitmap;
}
现在您的位图已经准备好了,现在请按照下面的方式设置 webview 客户端。
webView1.setWebViewClient(new myWebClient());
这里是myWebClient
public class myWebClient extends WebViewClient {
@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
// TODO Auto-generated method stub
super.onPageStarted(view, url, favicon);
}
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
// TODO Auto-generated method stub
view.loadUrl(url);
return true;
}
@Override
public void onPageFinished(WebView view, String url) {
// TODO Auto-generated method stub
super.onPageFinished(view, url);
Log.i("OnPageLoadFinished", url);
img.setImageBitmap(bmp);
}
在页面加载完成后,我设置了一个图像位图,它是您的Webview中当前加载网址的快照。
现在位图已准备好,可以使用IText库将其传递给Pdf。
以下是使用iText编写带有图像的PDF的示例,请使用下面的函数进行操作。
public void SimplePDFTable() throws Exception {
File direct = new File(Environment.getExternalStorageDirectory()
.getAbsolutePath() + "/AamirPDF");
if (!direct.exists()) {
if (direct.mkdir()) {
Toast.makeText(MainActivity.this,
"Folder Is created in sd card", Toast.LENGTH_SHORT)
.show();
}
}
String test = Environment.getExternalStorageDirectory()
.getAbsolutePath() + "/AamirPDF";
Document document = new Document();
PdfWriter.getInstance(document, new FileOutputStream(test
+ "/mypdf.pdf"));
document.open();
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bmp.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] byteArray = stream.toByteArray();
Image image = Image.getInstance(byteArray);
image.scaleToFit(PageSize.A4.getHeight(), PageSize.A4.getWidth());
document.add(image);
document.close();
}
祝你好运
private fun createWebPrintJob(webView: WebView) {
val printManager = this.getSystemService(Context.PRINT_SERVICE) as PrintManager
val printAdapter = webView.createPrintDocumentAdapter()
val jobName = getString(R.string.app_name) + " Print Test"
printManager.print(
jobName, printAdapter,
PrintAttributes.Builder().build()
)
}
库:
implementation 'com.github.pramodkr123:ConvertWebViewToPdfDemo:1.0.4'
Kotlin 代码:
private fun sentEmailAndSavePDF() {
val directory =
Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM + "/MDP-PDF/")
val min = 1000
val max = 9999
val random = Random().nextInt(max - min + 1) + min
val fileName = "MDP_$random.pdf"
PdfView.createWebPrintJob(
this@WebViewActivity,
binding.webview,
directory,
fileName,
object : PdfView.Callback {
override fun success(p0: String?) {
Log.e(TAG, "success: ")
//p0 is your pdf PATH
}
override fun failure() {
}
})
}