Notifications in the notification drawer appear in two main visual styles, normal view and big view. The big view of a notification only appears when the notification is expanded. This happens when the notification is at the top of the drawer, or the user clicks the notification.
Big views were introduced in Android 4.1, and they're not supported on older devices.
Big Text style lets the user preview more of the text when the notification is expanded.
Payload field key: bigText
Required
Type: string
Value: Long text to be displayed.
{"payload":{"bigText":"Long text here...."}} Payload field key: keepText
Optional
Type: Boolean
Value: Set to true if you wanna keep the original message text in msg parameter
Payload field key: nTitle
Optional
Type: String
Value: Custom notification title.If there is no ntitle parameter, the application name displays.
Payload field key: nSumm
Optional
Type: String
Value: notification summary text.
