Package 

Object PDFThumbnailGenerator

  • 
public class PDFThumbnailGenerator

    Utility class for generating PDF thumbnails from various document sources.

    This class provides static methods to generate thumbnails from PDF documents using different sources like File, Uri, ByteArray, InputStream, or asset paths. All operations are performed on background threads for optimal performance.

    Example usage:

    // Generate a simple thumbnail
val thumbnail = PDFThumbnailGenerator.generateThumbnail(context, file)

// Generate with custom configuration
val config = ThumbnailConfig(
    width = 300,
    height = 400,
    quality = Bitmap.Config.ARGB_8888,
    annotationRendering = true
)
val thumbnail = PDFThumbnailGenerator.generateThumbnail(context, file, config = config)

// Generate multiple thumbnails
val thumbnails = PDFThumbnailGenerator.generateThumbnails(
    context, file, listOf(0, 1, 2)
)

    • Method Detail

      • generateThumbnail

         final Bitmap generateThumbnail(Context context, Object source, Integer pageIndex, ThumbnailConfig config, String password, Boolean useCache)

        Generates a thumbnail for a specific page of a PDF document.

        Parameters:
        context - The application context.
        source - The PDF document source (File, Uri, ByteArray, InputStream, String asset path, or DocumentSource).
        pageIndex - The page index to generate thumbnail for (0-based).
        config - The thumbnail configuration.
        password - Optional password for encrypted PDFs.
        useCache - Whether to use caching for improved performance.

      • generateThumbnails

         final List<Bitmap> generateThumbnails(Context context, Object source, List<Integer> pageIndices, ThumbnailConfig config, String password, Boolean useCache)

        Generates thumbnails for multiple pages of a PDF document.

        Parameters:
        context - The application context.
        source - The PDF document source.
        pageIndices - List of page indices to generate thumbnails for (0-based).
        config - The thumbnail configuration for all pages.
        password - Optional password for encrypted PDFs.
        useCache - Whether to use caching for improved performance.

      • getPageCount

         final Integer getPageCount(Context context, Object source, String password)

        Gets the total number of pages in a PDF document.

        Parameters:
        context - The application context.
        source - The PDF document source.
        password - Optional password for encrypted PDFs.

      • clearCache

         final Unit clearCache()

        Clears the thumbnail cache to free memory.