I recently developed an app which downloads pdfs from the server and saves them in a local storage.
I can open the file if I don’t uninstall the app. If I reinstall the app then I cannot open the file.

Also I don’t need access to other folders as I only target a folder ( folder That will be created ) in downloads folder.

I tried using various methods like mediastore or something new methods but cannot solve the issue.

 fun openPdfIntent(filePath: File, context: Context) {


        Log.i("Pdf", "openPdfIntent: ${filePath.absolutePath} ")
        val pdfIntent = Intent(Intent.ACTION_VIEW)
        val path =
            FileProvider.getUriForFile(context, BuildConfig.APPLICATION_ID + ".provider", filePath)
        pdfIntent.setDataAndType(
            path,
            "application/pdf"
        )
        pdfIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
        try {
            if (filePath.canRead()) {
                Log.i("Pdf", "openPdfIntent:  exists  and open")
                context.startActivity(pdfIntent)

            } else {
                pdfIntent.setDataAndType(
                    filePath.toUri(),
                    "application/pdf"
                )
                pdfIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
                Log.i("Pdf", "openPdfIntent: Doesn't exists ")
            }
        } catch (e: Exception) {
            Toast.makeText(context, "Please Install Pdf Viewer", Toast.LENGTH_SHORT).show()
            if (filePath.exists()) {
                filePath.delete()
                Log.i("Pdf", "openPdfIntent: Deleted ")
            }
        }
    }


//function to download files.

 fun onDownload(
        index: Int,
        url: String,
        unitName: String,
        subjectName: String,
        context: Context,
    ) {
        viewModelScope.launch(IO) {
            val kDownloader = KDownloader.create(context)
            withContext(
                IO
            ) {

                this.async {

                    val req = kDownloader.newRequestBuilder(
                        url,
                        getFileDirectory(context).path + "/KIET PDFS/$subjectName",
                        "${subjectName}_${unitName}.pdf"
                    ).build()
                    kDownloader.enqueue(req,
                        onStart = {
                            Log.i("Downloads", "onDownload: Started for file $unitName.pdf")

                            downloadStatus[index] = downloadStatus[index].copy(
                                downloadProgress = DownloadProgress.Running
                            )
                        },
                        onCompleted = {
                            Log.i("Downloads", "onDownload: Success for $unitName.pdf ")
                            downloadStatus[index] = downloadStatus[index].copy(
                                downloadProgress = DownloadProgress.Success
                            )
                        }, onError = {
                            Log.i("Downloads", "onDownload: Error $it")
                            downloadStatus[
                                index
                            ] = downloadStatus[index].copy(
                                downloadProgress = DownloadProgress.Failed
                            )
                        }

                    )
                }.await()

            }

        }

    }

fun getFileDirectory(context: Context): File {
    return if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.Q) {
        context.getExternalFilesDir(Environment.DIRECTORY_DOWNLOADS)!!
    } else {
        Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS)
    }

}

Android Manifest

<provider
            android:name="androidx.core.content.FileProvider"
            android:authorities="${applicationId}.provider"
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/file_paths" />
        </provider>

file_paths.xml

<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">

    <external-path path="Android/data/${applicationId}/" name="files_root" />

    <root-path
        name="root"
        path="/" />

</paths>