...

app/src/main/java/com/base/pdfreader2/ui/pdf/PdfPresenter.kt

@@ -129,7 +129,8 @@ class PdfPresenter(
 
     fun createNewPdfPath(name: String): String {
         val appDir = createAppDocumentDir()
-        val mergeFile = File(appDir, "$name.pdf")
+        val child = if (name.endsWith(".pdf")) name else "$name.pdf"
+        val mergeFile = File(appDir, child)
         mergeFile.createNewFile()
         LogEx.logDebug(TAG, "mergeFile ${mergeFile.absolutePath}")
         return mergeFile.absolutePath