BasePDFPagerAdapter.java 文件源码

@SuppressWarnings("NewApi")
private PdfRendererParams extractPdfParamsFromFirstPage(PdfRenderer renderer, float renderQuality) {
    PdfRenderer.Page samplePage = getPDFPage(renderer, FIRST_PAGE);
    PdfRendererParams params = new PdfRendererParams();

    params.setRenderQuality(renderQuality);
    params.setOffScreenSize(offScreenSize);
    params.setWidth((int) (samplePage.getWidth() * renderQuality));
    params.setHeight((int) (samplePage.getHeight() * renderQuality));

    samplePage.close();

    return params;
}