I want to be able to read a file hosted online in my android application. The google docs pdf viewers are effective but do not provide a good experience. The PDFViewer jar for opening the file works well for files offline but does not seem to be working for online files. Any sample which shows this.
For reading from SD card, I have found this sample to be very effective [Example of code to implement a PDF reader
Thanks
There is a pdf viewer that's working well in this case, it's RadaeePDF
To open a pdf from remote url:
Global.Init( this );
PDFHttpStream m_stream = new PDFHttpStream();
Document m_doc = new Document();
ReaderController m_vPDF = new ReaderController(this);
m_doc.Close();
m_stream.open("http://server/filename.pdf");
int ret = m_doc.OpenStream(m_stream, null);
if( ret == 0 ) {
m_vPDF.open(m_doc);
setContentView( m_vPDF );
}
Related
Using the Android sample in the WebViewer folder I have an application in Android Studio which when run on my device works and displays the xod file given as expected. However I've tried to change the lines:
String documentPath = getFilesDir().getPath() + "/GettingStarted.xod";
InputStream in = getAssets().open("xod/GettingStarted.xod");
to
String documentPath = getFilesDir().getPath() + "/sample.pdf";
InputStream in = getAssets().open("xod/sample.pdf");
And have also changed the endsWith(".xod") to endsWith(".pdf") but I only get a grey screen. For this to work does the file have to be a .xod? As it works for xod files but not pdf files.
Thanks for your time.
Yes, for mobile viewing you need to convert your files to the web-optimized XOD format.
The PDF backend for WebViewer is not available for mobile browsers. This is due to limitations of the hardware and the mobile browsers.
For desktop browsers, to switch from XOD backend to PDF backend, you need to follow the steps. See here for more details, especially if you run into any errors.
var myWebViewer = new PDFTron.WebViewer({
path: "lib",
type: "html5",
documentType: "pdf",
initialDoc: "GettingStarted.pdf"
}, viewerElement);
Notice the documentType parameter is set to pdf.
I found this two possibilities to show a pdf file.
Open a webView with:
webView.loadUrl("https://docs.google.com/gview?embedded=true&url="+uri);
Open the pdf File with a extern App:
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(outFile),"application/pdf");
intent.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
startActivity(intent);
Both of them work. But my problem is that the pdf is for internal use only and in both examples the user could download it or save it in another folder.
I know frameworks for this in iOS dev, I looking for a solution that works with Android.
Android provides PDF API now with which it is easy to present pdf content inside application.
you can find details here
Below is the sample snippet to render from a pdf file in assets folder.
private void openRenderer(Context context) throws IOException {
// In this sample, we read a PDF from the assets directory.
File file = new File(context.getCacheDir(), FILENAME);
if (!file.exists()) {
// Since PdfRenderer cannot handle the compressed asset file directly, we copy it into
// the cache directory.
InputStream asset = context.getAssets().open(FILENAME);
FileOutputStream output = new FileOutputStream(file);
final byte[] buffer = new byte[1024];
int size;
while ((size = asset.read(buffer)) != -1) {
output.write(buffer, 0, size);
}
asset.close();
output.close();
}
mFileDescriptor = ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY);
// This is the PdfRenderer we use to render the PDF.
if (mFileDescriptor != null) {
mPdfRenderer = new PdfRenderer(mFileDescriptor);
}
}
update: This snippet is from google developers provided samples.
Many libraries are available for showing pdfs within your own app.
Android PDF Viewer
VuDroid
APDFViewer
droidreader
android-pdf
mupdf
android-pdfView
For a working example using android-pdfView, see this blog post.
It demonstrates the basic usage of the library to display pdf onto the view with vertical and horizontal swipe.
pdfView = (PDFView) findViewById(R.id.pdfView);
pdfView.fromFile(new File("/storage/sdcard0/Download/pdf.pdf")).defaultPage(1).enableSwipe(true).onPageChange(this).load();
You can show the PDF in your own viewer
Tier are few open source pdf viewers you should look at:
http://androiddeveloperspot.blogspot.com/2013/05/android-pdf-reader-open-source-code.html
You can encrypt the pdf and make sure that your viewer only will be able to decrypt it.
My server spits out the source of a PDF. With XHR2 I request that code using xhr.responseType = 'blob'; For iOS I then just use
blob = new Blob([this.response], {type: "application/pdf"});
and then save it using Phonegap's Filewriter. When I then open the saved file, I have a perfect PDF. I simply can't get anything similar to work on Android. My last attempt was:
if (!window.BlobBuilder && window.WebKitBlobBuilder){
window.BlobBuilder = window.WebKitBlobBuilder;
var bb = new window.BlobBuilder();
bb.append(this.response);
blob = bb.getBlob("application/pdf");}
since Android coughed over just plain 'BlobBuilder'. That duly creates a PDF which FileWriter then saves. The files structure is presumably OK as a PDF since PDF readers open it without complaint. Unfortunately, the PDF is completely blank.
I just don't seem to be able to get my elderly head around whatever is required by Android.
I have .pdf file and multiple forms are there.
I want to open my .pdf file, fill the forms and save it from Android development.
Is there any API for Android Rendering.
I found iText but I just manage to create new pdf and than i can fill form. means which .pdf file i created that will be filled out. I need to fill my form in my own .pdf.
Thanks in Advance...any help will be appreciated...
DynamicPDF Merger for Java allows you to do just that. You can take an existing PDF document, fill out the form field values and then output that newly filled PDF.
There was a recent blog post on dynamicpdf.com on setting up DynamicPDF for Java in an Android application and creating a simple PDF from it, http://www.dynamicpdf.com/Blog/post/2012/06/15/Generating-PDFs-Dynamically-on-Android.aspx.
You can easily take that example one step further and use it to accomplish your task of form filling. The following (untested) code is an example of what it would take to form fill an existing PDF on an Android device using DynamicPDF Merger for Java:
InputStream inputStream = this.getAssets().open("PDFToFill.pdf");
long avail = inputStream.available();
byte[] samplePDF = new byte[(int) avail];
inputStream.read(samplePDF , 0, (int) avail);
inputStream.close();
PdfDocument objPDF = new PdfDocument(samplePDF);
MergeDocument document = new MergeDocument(objPDF);
document.getForm().getFields().getFormField("FormField1").setValue("My Text");
document.draw("[PhysicalPath]/FilledPDF.pdf");
The native PDF support on current Android platforms (including Android P) doesn't expose any controls for filling forms. 3rd-party PDF SDKs such as PSPDFKit fill this gap and allow programmatic PDF form filling:
List<FormField> formFields = document.getFormProvider().getFormFields();
for (FormField formField : formFields) {
if (formField.getType() == FormType.TEXT) {
TextFormElement textFormElement = (TextFormElement) formField.getFormElement();
textFormElement.setText("Test " + textFormElement.getName());
} else if (formField.getType() == FormType.CHECKBOX) {
CheckBoxFormElement checkBoxFormElement = (CheckBoxFormElement)formField.getFormElement();
checkBoxFormElement.toggleSelection();
}
}
(If you click on above link there's also a Kotlin PDF form filling example.)
Note that most SDKs on the market focus on PDF AcroForms, and not the XFA specification, which has been deprecated in the PDF 2.0 spec.
i am new to android application development.
using iText i had done the PDF creation n write on that created file
now i want to read that PDF file.
how to open or read a PDF file using iText.
Examples will be appreciable..
thenx in advance.....!!!
which is the best library to render the PDF file..????
JPedal / iText / gnujpdf or anyother.....?????
Actually, iText is only for PDF creation, it doesn't contains viewer part. So, you need to choose some another library. You can follow the link provided by Azharahmed to find some useful libraries.
You can create your own PDF Viewer using iText, you can fetch Images for the specific page and simply display that image in a Scroll View.
But for using this approach, you will have to implement an efficient cache and set the specific pages threshold that will be made on initial run and progressively.
Here is the link, that will facilitate you:
public void makeImageFromPDF throws DocumentException,
IOException {
String INPUTFILE = Environment.getExternalStorageDirectory()
.getAbsolutePath()+"/YOUR_DIRECTORY/inputFile.pdf";
String OUTPUTFILE = Environment.getExternalStorageDirectory()
.getAbsolutePath()+"/YOUR_DIRECTORY/outputFile.pdf";
Document document = new Document();
PdfWriter writer = PdfWriter.getInstance(document,
new FileOutputStream(OUTPUTFILE));
document.open();
PdfReader reader = new PdfReader(INPUTFILE);
int n = reader.getNumberOfPages();
PdfImportedPage page;
// Traversing through all the pages
for (int i = 1; i <= n; i++) {
page = writer.getImportedPage(reader, i);
Image instance = Image.getInstance(page);
//Save a specific page threshold for displaying in a scroll view inside your App
}
document.close();
}
You can also use this link as a reference:
Reading a pdf file using iText library
I hope this helps.