Android Open Source - MiraSlide Pdf Viewer Presentation

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Back to project page MiraSlide.

License

The source code is released under:

Apache License

Java Source Code

package fr.cmoatoto.miraslide;
//from  ww w  .ja  v a  2  s  . co m
import java.io.File;

import android.app.Presentation;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Point;
import android.os.Bundle;
import android.util.Log;
import android.view.Display;
import android.widget.ImageView;
import android.widget.Toast;
import cx.hell.android.lib.pagesview.RenderingException;
import cx.hell.android.lib.pagesview.Tile;
import cx.hell.android.lib.pdf.PDF;
import cx.hell.android.pdfviewpro.PDFPagesProvider;

/**
 * This is the Presentation class, extended to show PDF slides.
 * 
 * @author CmoaToto
 */
public class PdfViewerPresentation extends Presentation {

  private final static String TAG = PdfViewerPresentation.class.getName();

  /** The PDF object describing the pdf file */
  private PDF mPdf = null;

  /** The pdf page provider let us get things from the pdf file. Here we need bitmap for each page */
  private PDFPagesProvider mPdfPagesProvider = null;

  /** Element required for native classes */
  private int box = 2;

  /** Path to pdf file */
  private String mPdfFilePath = null;

  /** this view is the only view of the presentation, where we show the bitmaps */
  private ImageView mImageView;

  /** this Point stores the size of the Display to get the best Bitmaps. */
  private Point mOutSize;

  /** Current page */
  private int mPage = 0;

  /** Sizes of all the pages of the pdf */
  private int[][] pagesSize;

  /** Constructor. It creates the Presentation, then load the Pdf to show */
  public PdfViewerPresentation(Context context, Display display, String pdfFilePath) {
    super(context, display);
    mPdfFilePath = pdfFilePath;
    init();
  }

  /** Constructor. It creates the Presentation, then load the Pdf to show */
  public PdfViewerPresentation(Context context, Display display, int theme, String pdfFilePath) {
    super(context, display, theme);
    mPdfFilePath = pdfFilePath;
    init();
  }

  /** Get the size of the display then load the Pdf to show */
  private void init() {
    mOutSize = new Point();
    getDisplay().getSize(mOutSize);
    startPDF();
  }

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    Log.d(TAG, "onCreate(" + savedInstanceState + ")");

    createContentView();

    showPage();
  }

  /** Show the current page on the Presentation view */
  private void showPage() {
    mImageView.setImageBitmap(getPage(mPage));
  }

  /** return the Bitmap of the pdf specified page */
  public Bitmap getPage(int page) {
    Tile tile = new Tile(page, 1000, 0, 0, 0, pagesSize[page][0], pagesSize[page][1]);
    Bitmap bm = null;
    try {
      bm = mPdfPagesProvider.renderBitmap(tile);
      if (bm == null) {
        bm = mPdfPagesProvider.getPageBitmap(tile);
      }
    } catch (RenderingException e) {
      e.printStackTrace();
    }
    return bm;
  }

  /** Create the imageView to show the pdf pages Bitmaps */
  private void createContentView() {
    mImageView = (ImageView) getLayoutInflater().inflate(R.layout.presentation_main, null);
    setContentView(mImageView);
  }

  /** create the PDF object, PDF Page Provider etc..., based on the pdfFilePath */
  private void startPDF() {
    mPdf = getPDF();
    if (!mPdf.isValid()) {
      Log.v(TAG, "Invalid PDF");
      if (mPdf.isInvalidPassword()) {
        Toast.makeText(getContext(), "This file needs a password", Toast.LENGTH_SHORT).show();
      } else {
        Toast.makeText(getContext(), "Invalid PDF file", Toast.LENGTH_SHORT).show();
      }
      return;
    }
    mPdfPagesProvider = new PDFPagesProvider(mOutSize, mPdf, false, true);
    pagesSize = mPdfPagesProvider.getPageSizes();
  }

  /** return PDF instance wrapping file referenced by filepath. It reads all bytes to memory. */
  private PDF getPDF() {
    return new PDF(new File(mPdfFilePath), box);
  }

  /** Move the presentation to 'moveby' pages. It can be 1, -1 or anything... */
  public void moveBy(int moveBy) {
    if (mPage + moveBy >= 0 && mPage + moveBy < getPageCount()) {
      mPage += moveBy;
      showPage();
    }
  }

  /** Move the presentation to the page 'page' */
  public void moveTo(int page) {
    if (page >= 0 && page < getPageCount()) {
      mPage = page;
      showPage();
    }
  }

  /** return the number of page of the presentation */
  public int getPageCount() {
    return mPdf.getPageCount();
  }

}

Java Source Code List

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