how to create a pdf viewer app code example

Example: Creating PDF reader app

PDFView pdfView = findViewById(R.id.pdfView);pdfView.fromAsset(filename)        .enableSwipe(true)        .swipeHorizontal(true)        .enableDoubletap(true)        .defaultPage(0)        .enableAnnotationRendering(false)        .password(null)        .scrollHandle(null)        .enableAntialiasing(true)        .spacing(0)        .pageFitPolicy(FitPolicy.WIDTH)        .load();