Cannot resolve method 'setText(double)'

The error message "Cannot resolve method 'setText(double)'" means that there is no method called `setText()` that accepts a double value as an argument.

The `setText()` method is used to set the text of a TextView in Android, and it accepts a String value as an argument. If you want to display the double value in a TextView, you should convert it to a String first using the `String.valueOf()` method.

For example, if you have a double variable called `myDouble` and you want to display its value in a TextView called `myTextView`, you can do it like this:

double myDouble = 3.14;
TextView myTextView = findViewById(R.id.myTextView);
myTextView.setText(String.valueOf(myDouble));

This will convert the double value to a String and set the text of the TextView to that String.