Android Question [B4A] Save PDF as image

[vecino]

Hello, is there any library or class that allows to save a PDF file as a JPG or PNG image?
Thank you.

 

[DonManfred]

PDFium - Pdfview2

This is a wrap for a PDF-View which is based on PDFium. It is based on these two Github-Projects: Pdfium and Android PDF-View The PDF-View is based on Pdfium 1.9 The Library, resp. the Natives inside, are 64bit Compliant btw. It supports Horizontal and Vertical scrolling, Pagesnap. PDFium...

www.b4x.com

and https://www.b4x.com/android/forum/threads/pdfium-pdfview2.102756/#post-644710

 

[vecino]

Thanks for the information and links.
I don't know if it is outdated, but I find it impossible to even run the example

 

[zed]

PDFium works great.

Here is an example with PDFium.

#Region  Project Attributes
    #ApplicationLabel: B4A Example
    #VersionCode: 1
    #VersionName:
    'SupportedOrientations possible values: unspecified, landscape or portrait.
    #SupportedOrientations: unspecified
    #CanInstallToExternalStorage: False
#End Region

#Region  Activity Attributes
    #FullScreen: False
    #IncludeTitle: True
#End Region

#AdditionalJar: android-pdf-viewer.aar
#AdditionalJar: com.android.support:support-v4
#AdditionalJar: Pdfium.aar

Sub Process_Globals
    'These global variables will be declared once when the application starts.
    'These variables can be accessed from all modules.

End Sub

Sub Globals
    'These global variables will be redeclared each time the activity is created.
    'These variables can only be accessed from this module.
    Dim pdf As PdfiumCore
    Private PDFView1 As PDFView
    Private btnFirst As Button
    Private btnPrev As Button
    Private lblPages As Label
    Private btnNext As Button
    Private btnLast As Button
    Private glPages As Int
    Private imgPDF As ImageView
End Sub


Sub Activity_Create(FirstTime As Boolean)
    'Do not forget to load the layout file created with the visual designer. For example:
    Activity.LoadLayout("Layout1")
 
    pdf.Initialize("PDFium")
    File.Copy(File.DirAssets,"sample.pdf",File.DirInternal,"sample.pdf")
    Dim cfg As Configurator = PDFView1.fromUri(File.DirInternal,"sample.pdf")
    cfg.SetEventname("PDFium")
    cfg.autoSpacing(True).enableSwipe(True).pageSnap(True).swipeHorizontal(False).addOnErrorListener.addOnLoadCompleteListener.addOnPageChangeListener.addOnPageErrorListener.addOnTapListener.load

'***** FOR RENDERING ************************
 RenderPDFThumbnail("sample.pdf",3) '3 = page 3
 '************************************************
End Sub

Sub PDFium_loadComplete(pages As Int)
    Log($"PDFium_loadComplete(${pages})"$)
    glPages = pages
    lblPages.Text = $"${glPages}"$
End Sub
Sub PDFium_onInitiallyRendered(page As Int)
    Log($"PDFium_onInitiallyRendered(${page})"$)
End Sub
Sub PDFium_onPageChanged(page As Int, TotalPages As Int)
    Log($"PDFium_onPageChanged(${page},${TotalPages})"$)
    lblPages.Text = $"${page-1}/${glPages}"$

End Sub
Sub PDFium_PageNum(page As Int)
    Log($"PDFium_PageNum(${page})"$)
End Sub
Sub PDFium_Show()
    Log($"PDFium_Show()"$)
End Sub

Sub Activity_Resume

End Sub

Sub Activity_Pause (UserClosed As Boolean)

End Sub


Sub btnFirst_Click
    PDFView1.jumpTo2(0,False)
End Sub

Sub btnPrev_Click
    PDFView1.jumpTo2(PDFView1.CurrentPage-1,False)
End Sub

Sub lblPages_Click
 
End Sub

Sub btnNext_Click
    PDFView1.jumpTo2(PDFView1.CurrentPage+1,False)
 
End Sub

Sub btnLast_Click
    PDFView1.jumpTo2(glPages-1,False)
End Sub

'***** FOR RENDERING *************************************************************************************
Sub RenderPDFThumbnail(TheFilename As String, page As Int)
    Dim NewBitmap As Bitmap
    Dim bmp As Bitmap
    Dim glDoc As Object
    glDoc = pdf.newDocument(File.DirInternal,TheFilename, 268435456,"")
    bmp.InitializeMutable(600dip,600dip)
    pdf.openPage(glDoc,page)
 
    pdf.renderPageBitmap(glDoc,bmp,page,0,0,600dip,600dip)
 
    Dim out As OutputStream = File.OpenOutput(File.DirInternal, "Out.jpg", False)
    bmp.WriteToStream(out, 80, "JPEG")
    out.Close
    NewBitmap = LoadBitmap(File.DirInternal, "Out.jpg")
    imgPDF.Bitmap = NewBitmap
End Sub

Tips: Add your pdf in assets folder and chek additional jar

 

[vecino]

The problem is that I can't find the android-pdf-viewer.aar

 

[drgottjr]

maybe here: https://search.maven.org/remotecont....0-beta.1/android-pdf-viewer-3.2.0-beta.1.aar

 

[zed]

Here is.

https://mvnrepository.com/artifact/com.github.barteksc/android-pdf-viewer

 

[vecino]

Something is not right:

Logger connected to: LENOVO Lenovo TB125FU
--------- beginning of main
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create (first time) **
** Activity (main) Resume **
onError()
java.lang.NoClassDefFoundError: Failed resolution of: Landroid/support/v4/util/ArrayMap;
at com.shockwave.pdfium.PdfDocument.<init>(PdfDocument.java:109)
at com.shockwave.pdfium.PdfiumCore.newDocument(PdfiumCore.java:132)
at com.github.barteksc.pdfviewer.source.UriSource.createDocument(UriSource.java:38)
at com.github.barteksc.pdfviewer.DecodingAsyncTask.doInBackground(DecodingAsyncTask.java:53)
at com.github.barteksc.pdfviewer.DecodingAsyncTask.doInBackground(DecodingAsyncTask.java:27)
at android.os.AsyncTask$3.call(AsyncTask.java:394)
at java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1137)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
at java.lang.Thread.run(Thread.java:1012)
Caused by: java.lang.ClassNotFoundException: android.support.v4.util.ArrayMap
... 10 more
** Activity (main) Pause, UserClosed = false **
** Service (starter) Destroy (ignored)**

 

[vecino]

I had not seen your previous message, I will give it a try.

 

[vecino]

The same

onError()
java.lang.NoClassDefFoundError: Failed resolution of: Landroid/support/v4/util/ArrayMap;
at com.shockwave.pdfium.PdfDocument.<init>(PdfDocument.java:109)
at com.shockwave.pdfium.PdfiumCore.newDocument(PdfiumCore.java:132)
at com.github.barteksc.pdfviewer.source.UriSource.createDocument(UriSource.java:38)
at com.github.barteksc.pdfviewer.DecodingAsyncTask.doInBackground(DecodingAsyncTask.java:49)
at com.github.barteksc.pdfviewer.DecodingAsyncTask.doInBackground(DecodingAsyncTask.java:25)
at android.os.AsyncTask$3.call(AsyncTask.java:394)
at java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1137)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
at java.lang.Thread.run(Thread.java:1012)
Caused by: java.lang.ClassNotFoundException: android.support.v4.util.ArrayMap
... 10 more

 

[zed]

Maybe an SDK problem ?
JDK14.0.1
SDK33

 

[vecino]

It seems that it is not, Thank you.

 

[zed]

I don't have a solution to this problem.
I installed everything according to the procedures and everything works.
I just added a code.
I suggest you open a new tread for this problem.

 

[vecino]

It may be a problem with my tablet. I will try another one.
Thank you very much for your help.

 

[aeric]

It seems that it is not, Thank you.

Not recommend to put Additional Libraries folder inside "Program Files".

 

[vecino]

Not recommend to put Additional Libraries folder inside "Program Files".

Oh, I didn't know that.
Where is it recommended to put it?

 

[vecino]

I don't have a solution to this problem.
I installed everything according to the procedures and everything works.
I just added a code.
I suggest you open a new tread for this problem.

It is already solved, the problem was in the pdf file I was using, it would be damaged. I used another one and it worked perfectly.
Thank you very much.

 

[zed]

Where is it recommended to put it?

for example
c:\B4X_addLib