Toast
Toast.makeText(this,"Hello from the Toast",Toast.LENGTH_LONG).show() //Parametros: (Contexto,Texto,Duracion)
Snackbar
Añadir al Gradle:
implementation 'com.android.support:design:27.0.0'
**Versiones de las Librerías de Soporte
val layout = findViewById<ConstraintLayout>(R.id.constraint) Snackbar.make(layout,"Hello fron SnackBar!",Snackbar.LENGTH_LONG).show()//Igual que el Toast pero le pasas un View
Snackbar con Botón
==Action Button==>
Snackbar.make(layout,"Hello fron SnackBar!",Snackbar.LENGTH_LONG).setAction("UNDO") { // Parametros de setAction(Texto, Action ó Callback)) Snackbar.make(layout,"Email has been restored!!",Snackbar.LENGTH_LONG).show() }.show()