/** Shows the specified page of PDF to the screen. */
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
private void showPage() {
count++;
if (mPdfRenderer.getPageCount() == (count)) {
count = 0;
}
// Make sure to close the current page before opening another one.
if (null != mCurrentPage) {
mCurrentPage.close();
}
// Use `openPage` to open a specific page in PDF.
mCurrentPage = mPdfRenderer.openPage(count);
// Important: the destination bitmap must be ARGB (not RGB).
Bitmap bitmap =
Bitmap.createBitmap(
mCurrentPage.getWidth(), mCurrentPage.getHeight(), Bitmap.Config.ARGB_8888);
// Here, we render the page onto the Bitmap.
// To render a portion of the page, use the second and third parameter. Pass nulls to get
// the default result.
// Pass either RENDER_MODE_FOR_DISPLAY or RENDER_MODE_FOR_PRINT for the last parameter.
mCurrentPage.render(bitmap, null, null, PdfRenderer.Page.RENDER_MODE_FOR_DISPLAY);
// We are ready to show the Bitmap to user.
mImageView.setImageBitmap(bitmap);
Animation hyperspaceJumpAnimation =
AnimationUtils.loadAnimation(getActivity(), R.anim.anim_slide_bottom_top);
mImageView.startAnimation(hyperspaceJumpAnimation);
// updateUi();
}
/**
* Closes the {@link android.graphics.pdf.PdfRenderer} and related resources.
*
* @throws java.io.IOException When the PDF file cannot be closed.
*/
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
private void closeRenderer() throws IOException {
if (null != mCurrentPage) {
mCurrentPage.close();
}
mPdfRenderer.close();
mFileDescriptor.close();
}
/**
* Gets the number of pages in the PDF. This method is marked as public for testing.
*
* @return The number of pages.
*/
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
public int getPageCount() {
return mPdfRenderer.getPageCount();
}
/** Updates the state of 2 control buttons in response to the current page index. */
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
private void updateUi() {
int index = mCurrentPage.getIndex();
int pageCount = mPdfRenderer.getPageCount();
// getActivity().setTitle(getString(R.string.app_name_with_index, index + 1, pageCount));
}
