Download Manager returns unsuccessful download on Android 9.0 NetworkSecurityConfig: No Network Security Config specified, using platform default

Question

I am using Download Manager to download file from the internet. The download complete successfully in Android 6, 8.1, but not in Android 9.0

DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
request.setDescription("Downloading...");
request.setTitle(nameOfFile);
request.setMimeType("application/pdf");
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS + "/CPG", nameOfFile);
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
manager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
queueId = manager.enqueue(request);

Answer 1

This tag worked for me

 android:usesCleartextTraffic="true"

Add this tag to the application

 <application
        android:name=".ApplicationClass"
        android:allowBackup="true"
        android:hardwareAccelerated="false"
        android:usesCleartextTraffic="true"

Solution 2)

Create a XML res/xml/network_security_config.xml

<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
    <base-config cleartextTrafficPermitted="true" />
</network-security-config>

in your tag Application inside AndroidManifest.xml

android:networkSecurityConfig="@xml/network_security_config"

Download Manger not working in Android Pie 9.0 (Xiaomi mi A2)