Open File From Android App Kotlin | File Provider

 Open File From Android App Kotlin | File Provider | Provider Path

Make a new file provider_paths in XML in resources:

<?xml version="1.0" encoding="utf-8"?>
<paths>
    <external-path name="external_files" path="."/>
    <cache-path   name="cache"  path="."/>
    <external-files-path name="my_images" path="/" />
    <files-path path="/" name="filescache"/>
</paths>

Add the following code in Manifest inside the application:

<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/provider_paths" />
</provider>

Now open a file like this:

var newuri = FileProvider.getUriForFile(
    requireContext(),
    "com.application.name" + ".provider",
    File(requireContext().filesDir, file.name)
)

var i = Intent().setAction(Intent.ACTION_VIEW)
    .addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
    .setDataAndType(newuri, "application/pdf")
requireContext().startActivity(i)