Call toast and dialog in not an activity class

Sometimes we need to deal with some logic in the non-activity class, Show the Toast dialog box or pop a dialog, but there is no way to invoke these two in non-activity, and if necessary, consider passing the context, but it's too much trouble. There is another easy way to do this, and that is

Declare a static object in the activity where you want to display toast or dialog: public static mainactivity mactivity; and then in the OnCreate method inside the initialization of a sentence: Mactivity=this; This is the time to invoke the Toast method in other classes.

Call toast and dialog in not an activity class