Android EditText 控制不能输入空格

@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
if (count > 0){
btnLogin.setClickable(true);
}
if (s.toString().contains(" ")) {
String[] str = s.toString().split(" ");
String str1 = "";
for (int i = 0; i < str.length; i++) {
str1 += str[i];
}
password.setText(str1);
}