edittext.setInputType(InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS);

android:inputType="textNoSuggestions"

android:inputType="textNoSuggestions|textVisiblePassword"

edittext.setInputType(InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS | InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);

android:inputType="textNoSuggestions|textVisiblePassword"

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
    EditText editTextUsername =  (EditText)dialogView.findViewById(R.id.txtUsername);
    editTextUsername.setInputType(InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS);
}

android:inputType="textCapSentences|textNoSuggestions|textEmailAddress"

android:minLines="10"
 android:inputType="textNoSuggestions|textMultiLine|textVisiblePassword"