Why are push notifications incomplete?

Question

Android

Good afternoon!
Push notifications sent are displayed incompletely (20-30 characters maximum). The problem is typical only for android (on IOS everything is fine).
What can be done to achieve the correct display?
The problem is diagnosed on all android devices.

Answer 1

To display, use Notification.BigTextStyle
It is done like this:

Notification notif = new Notification.Builder(mContext)
     .setContentTitle("New mail from " + sender.toString())
     .setContentText(subject)
     .setSmallIcon(R.drawable.new_mail)
     .setLargeIcon(aBitmap)
     .setStyle(new Notification.BigTextStyle()
         .bigText(aVeryLongString))
     .build();

Then the text will be displayed in multiple lines.
Except for devices with version 4.0 and below (no way for these phones)