Check if edittext is empty

Approach 1:

EditText txtUserName = (EditText) findViewById(R.id.txtUsername);
String strUserName = usernameEditText.getText().toString();
if (strUserName.trim().equals("")) {
    Toast.makeText(this, "plz enter your name ", Toast.LENGTH_SHORT).show();
    return;
}

Approach 2:

You can use length() from EditText.

public boolean isEditTextEmpty(EditText mInput){
   if(mInput.length() == 0)
      return true;
   else
      return false;
}