Input errors - Android

On Android, you can use a TextView to show an error message. The error message should also be posted to assistive technologies by using an accessibility announcement.

You can also use TextInputLayout, which makes showing error messages easier. Set setErrorEnabled to true and then set the error message by using the setError method.

textView.setVisibility(View.VISIBLE)
textView.text = "Invalid date, must be in the form DD/MM/YYYY, for example, 01/01/2000"

input.setErrorEnabled(true)
input.setError("Invalid date, must be in the form DD/MM/YYYY, for example, 01/01/2000")