I want to generate the image(thumbnail) from pdf file just like done by WhatsApp as shown below
I have tried
and still unable to find a way to generate image from pdf.
PDFBox:
There is a github issue that deals with this problem (https://github.com/TomRoush/PdfBox-Android/issues/3) but this is still unresolved.
Note: I am successfully able to extract image from PDF using PDFBOX
AndroidPdfViewer:
Github issue (https://github.com/barteksc/AndroidPdfViewer/issues/49)
Use PdfiumAndroid as mentioned by barteksc here...
Sample Code for 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 with 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 is your Bitmap instance
} catch (Exception e) {
//todo with exception
} finally {
try {
if (out != null)
out.close();
} catch (Exception e) {
//todo with exception
}
}
}
Update:
Include library in build.gradle
compile 'com.github.barteksc:pdfium-android:1.4.0'
For generating Image of any PDF Page:
Call the method generateImageFromPdf(uri) by passing any PDF uri that is stored in your storage.
The method will generate the PDF.png in PDF folder of your storage.
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