PDFTool(Android) - 1.bug修复

DigitalSignature/src/main/java/com/compdfkit/digitalsignature/PDFSignaturesSampleActivity.java

@@ -57,6 +57,7 @@ public class PDFSignaturesSampleActivity extends CBasicPDFActivity {
     private ActivityResultLauncher<Void> selectDocumentLauncher = registerForActivityResult(new CSelectPDFDocumentResultContract(), uri -> {
         if (uri != null) {
             CFileUtils.takeUriPermission(this, uri);
+            binding.pdfView.setViewMode(CPDFReaderView.ViewMode.VIEW);
             screenStatusManager.constraintHide(binding.signStatusView);
             binding.signatureToolBar.reset();
             binding.pdfView.openPDF(uri);