What is the easiest way to use Toast in an Android MVVM design pattern?

Question

When I want to use Toast with MVVM,

In ViewModel

public MutableLiveData<String> setToast(){

    return ToTo;

}

public void ShowToast(String t){

    ToTo.postValue(t);

}

Put the code in this way.

In View

model.setToast().observe(this, ob_toast ->{

    Toast.makeText(getApplicationContext(), ob_toast, Toast.LENGTH_SHORT).show();

});

I used to coding like this.

Whenever I need it, I call the function 'ShowToast' from the ViewModel and write it. but I don't know if this is right.

need to create a class of Util functions?

I wonder if there is a pattern or a way to use it more easily.

score 1 · Accepted Answer · answered Dec 24 '19 at 10:18

I would recommend to not put Toast in your ViewModel class because it's an improper way to put context related stuff into ViewModel. Instead you can observe MutableLiveData variables in a context class (Fragment or Activity) and there generate and show your Toast depending on values from MutableLiveData.

What is the easiest way to use Toast in an Android MVVM design pattern?

1 Answers1