有没有办法防止句点自动输入到EditText中？

InputFilter filter = new InputFilter() {
    public CharSequence filter(CharSequence source, int start, int end,
            Spanned dest, int dstart, int dend) {
        if (source.equals(".")) {
            return "";
        }
        return null;
    }
};

editText.setFilters(new InputFilter[] { filter });

TextWatcher watcher = new TextWatcher() {
    public void onTextChanged(CharSequence s, int start, int before, int count) {
        if (s.toString().contains(".")) {
            editText.removeTextChangedListener(this);
            editText.setText(s.toString().replace(".", ""));
            editText.setSelection(editText.getText().length());
            editText.addTextChangedListener(this);
        }
    }

    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
    }

    public void afterTextChanged(Editable s) {
    }
};

editText.addTextChangedListener(watcher);

<EditText
    android:id="@+id/editText"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:imeOptions="actionDone"
    android:inputType="text" />