image - Generate Thumbnail of Pdf in Android -

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i want generate image(thumbnail) pdf file done whatsapp shown below whatsapp

i have tried

  1. pdfbox (https://github.com/tomroush/pdfbox-android)
  2. tika (compile 'org.apache.tika:tika-parsers:1.11')
  3. androidpdfviewer (https://github.com/barteksc/androidpdfviewer)

and still unable find way generate image pdf.

pdfbox:

there github issue deals problem (https://github.com/tomroush/pdfbox-android/issues/3) still unresolved.

note: able extract image pdf using pdfbox

androidpdfviewer:

github issue (https://github.com/barteksc/androidpdfviewer/issues/49)

use pdfiumandroid mentioned barteksc here...

sample code generating pdf thumb

//pdfiumandroid (https://github.com/barteksc/pdfiumandroid) //https://github.com/barteksc/androidpdfviewer/issues/49 void generateimagefrompdf(uri pdfuri) {     int pagenumber = 0;     pdfiumcore pdfiumcore = new pdfiumcore(this);     try {         //http://www.programcreek.com/java-api-examples/index.php?api=android.os.parcelfiledescriptor         parcelfiledescriptor fd = getcontentresolver().openfiledescriptor(pdfuri, "r");         pdfdocument pdfdocument = pdfiumcore.newdocument(fd);         pdfiumcore.openpage(pdfdocument, pagenumber);         int width = pdfiumcore.getpagewidthpoint(pdfdocument, pagenumber);         int height = pdfiumcore.getpageheightpoint(pdfdocument, pagenumber);         bitmap bmp = bitmap.createbitmap(width, height, bitmap.config.argb_8888);         pdfiumcore.renderpagebitmap(pdfdocument, bmp, pagenumber, 0, 0, width, height);         saveimage(bmp);         pdfiumcore.closedocument(pdfdocument); // important!     } catch(exception e) {         //todo exception     } }  public final static string folder = environment.getexternalstoragedirectory() + "/pdf"; private void saveimage(bitmap bmp) {     fileoutputstream out = null;     try {         file folder = new file(folder);         if(!folder.exists())             folder.mkdirs();         file file = new file(folder, "pdf.png");         out = new fileoutputstream(file);         bmp.compress(bitmap.compressformat.png, 100, out); // bmp bitmap instance     } catch (exception e) {         //todo exception     } {         try {             if (out != null)                 out.close();         } catch (exception e) {             //todo exception         }     } }

update:

include library in build.gradle

compile 'com.github.barteksc:pdfium-android:1.4.0'

for generating image of pdf page:

call method generateimagefrompdf(uri) passing pdf uri stored in storage.

the method generate pdf.png in pdf folder of storage.


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