android/source/src/java/org/libreoffice/PDFDocumentAdapter.java

   1 package org.libreoffice;
   2
   3 import android.annotation.TargetApi;
   4 import android.content.Context;
   5 import android.os.Bundle;
   6 import android.os.CancellationSignal;
   7 import android.os.ParcelFileDescriptor;
   8 import android.print.PageRange;
   9 import android.print.PrintAttributes;
  10 import android.print.PrintDocumentAdapter;
  11 import android.print.PrintDocumentInfo;
  12
  13 import java.io.File;
  14 import java.io.FileInputStream;
  15 import java.io.FileOutputStream;
  16 import java.io.IOException;
  17 import java.io.InputStream;
  18 import java.io.OutputStream;
  19
  20 @TargetApi(19)
  21 public class PDFDocumentAdapter extends PrintDocumentAdapter{
  22     Context mContext;
  23     String pdfFile;
  24
  25     public PDFDocumentAdapter(Context mContext, String pdfFile) {
  26         this.mContext = mContext;
  27         this.pdfFile = pdfFile;
  28     }
  29
  30     @Override
  31     public void onLayout(PrintAttributes oldAttributes, PrintAttributes newAttributes, CancellationSignal cancellationSignal, LayoutResultCallback callback, Bundle extras) {
  32         if (cancellationSignal.isCanceled()) {
  33             callback.onLayoutCancelled();
  34         }
  35         else {
  36             File f = new File(pdfFile);
  37             PrintDocumentInfo.Builder builder=
  38                     new PrintDocumentInfo.Builder(f.getName());
  39             builder.setContentType(PrintDocumentInfo.CONTENT_TYPE_DOCUMENT)
  40                     .setPageCount(PrintDocumentInfo.PAGE_COUNT_UNKNOWN)
  41                     .build();
  42             callback.onLayoutFinished(builder.build(),
  43                     !newAttributes.equals(oldAttributes));
  44         }
  45     }
  46
  47     @Override
  48     public void onWrite(PageRange[] pages, ParcelFileDescriptor destination, CancellationSignal cancellationSignal, WriteResultCallback callback) {
  49         InputStream in=null;
  50         OutputStream out=null;
  51         try {
  52             File file = new File(pdfFile);
  53             in = new FileInputStream(file);
  54             out=new FileOutputStream(destination.getFileDescriptor());
  55
  56             byte[] buf=new byte[in.available()];
  57             int size;
  58
  59             while ((size=in.read(buf)) >= 0
  60                     && !cancellationSignal.isCanceled()) {
  61                 out.write(buf, 0, size);
  62             }
  63
  64             if (cancellationSignal.isCanceled()) {
  65                 callback.onWriteCancelled();
  66             }
  67             else {
  68                 callback.onWriteFinished(new PageRange[] { PageRange.ALL_PAGES });
  69             }
  70         }
  71         catch (Exception e) {
  72             callback.onWriteFailed(e.getMessage());
  73             e.printStackTrace();
  74         }
  75         finally {
  76             try {
  77                 in.close();
  78                 out.close();
  79             }
  80             catch (IOException e) {
  81                 e.printStackTrace();
  82             }
  83         }
  84
  85     }
  86 }