Display error if user enters only spaces in EditText - Android

for me i use trim.Trim will remove first and last space of a string entered by a user.

String tName = tName.getText().toString.trim();

if(tName.matches("")){
    Toast.makeText(MainActivity.this, "Must Add Your Name Here", Toast.LENGTH_SHORT).show();
}

Try with this code

 if(!editText.getText().toString().trim().isEmpty()){
           editText.setError("Empty spaces are not allowed");
           editText.setFocusable(true);
           Toast.makeText(MainActivity.this, "Must Add Your Name Here", Toast.LENGTH_SHORT).show();
    }