Toast when app is closed or minimize

Ionic Info

Ionic CLI : 5.4.13
Ionic Framework : @ionic/angular 4.11.7
@angular-devkit/build-angular : 0.801.3
@angular-devkit/schematics : 8.1.3
@angular/cli : 8.1.3
@ionic/angular-toolkit : 2.1.1

Cordova:

Cordova CLI : 9.0.0 (cordova-lib@9.0.1)
Cordova Platforms : android 8.1.0
Cordova Plugins : cordova-plugin-ionic-keyboard 2.2.0, cordova-plugin-ionic-webview 4.1.3, (and 7 other plugins)

Utility:

cordova-res : 0.8.1
native-run : 0.3.0

System:

Android SDK Tools : 26.1.1
NodeJS : v10.16.2
npm : 6.9.0
OS : Windows 10

Please help…!