你能帮我找出Android上pdf文档的页数吗?至少支持api版本16。我正在提取文档信息,但找不到获得总页数的解决方案。这是我目前所做的:
private void extractDocumentDataFromUri(Uri uri)
{
String[] dataFileds = new String[]{
MediaStore.MediaColumns.DATA,
OpenableColumns.DISPLAY_NAME,
OpenableColumns.SIZE};
Cursor cursor = context.getContentResolver().query(uri, dataFileds, null, null, null);
cursor.moveToFirst();
contentUrl = cursor.getString(cursor.getColumnIndex(MediaStore.MediaColumns.DATA));
title = cursor.getString(cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME));
size = cursor.getInt(cursor.getColumnIndex(OpenableColumns.SIZE));
cursor.close();
contentType = context.getContentResolver().getType(uri);
}
试试这个:
private void countPages(File pdfFile) throws IOException {
try {
ParcelFileDescriptor parcelFileDescriptor = ParcelFileDescriptor.open(pdfFile, ParcelFileDescriptor.MODE_READ_ONLY);
PdfRenderer pdfRenderer = null;
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP) {
pdfRenderer = new PdfRenderer(parcelFileDescriptor);
totalpages = pdfRenderer.getPageCount();
pdfRenderer.close()
}
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
如果您将iTextG库添加到libs文件夹中,则此解决方案有效。标准库包含一个名为PdfReader的类。
试试这样写:
PdfReader reader = new PdfReader("Your file path");
int aa = reader.getNumberOfPages();