Android 簡單限制小數點後的位數以及只能以一個0開頭

numbers.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {

            }

            @Override
            public void afterTextChanged(Editable edt) {
                String temp = edt.toString();
                int posDot = temp.indexOf(".");
                if(temp.startsWith("00")){
                    edt.delete(0,1);
                    return;
                }
                if(posDot<0){
                    return;
                }
                if (temp.length() - posDot - 1 > 8)
                {
                    edt.delete(posDot + 9, posDot + 10);
                }
            }
        });