android:限制EditText输入位数

withDrawcet.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

}

@Override
public void onTextChanged(CharSequence s, int i, int i1, int i2) {
if (s.toString().contains(".")) {
if (s.length() - 1 - s.toString().indexOf(".") > 2) {
s = s.toString().subSequence(0,
s.toString().indexOf(".") + 3);
withDrawcet.setText(s);
withDrawcet.setSelection(s.length());
}
}
if (s.toString().trim().substring(0).equals(".")) {
s = "0" + s;
withDrawcet.setText(s);
withDrawcet.setSelection(2);
}

if (s.toString().startsWith("0")
&& s.toString().trim().length() > 1) {
if (!s.toString().substring(1, 2).equals(".")) {
withDrawcet.setText(s.subSequence(0, 1));
withDrawcet.setSelection(1);
return;
}
}
}

@Override
public void afterTextChanged(Editable editable) {}}；