android Textview文字監控(Textview使用方法)

1.首先給用戶添加一個textchangedlistener
2.然後再寫一個文字變化的監視器

復制代碼 代碼如下:
mobile_et.addTextChangedListener(textWatcher);

    /**
     * 實時監聽用戶輸入的手機號，輸入至最後一位後，計算折扣後的金額
     */
    TextWatcher textWatcher = new TextWatcher() {

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {
            // TODO Auto-generated method stub

        }

        @Override
        public void beforeTextChanged(CharSequence s, int start, int count,
                int after) {
            // TODO Auto-generated method stub

        }

        @Override
        public void afterTextChanged(Editable s) {
            if(s.length() == 11){
                String amountYuan = amount_et.getText().toString();//用戶選擇的金額+元
                String mobileNum = mobile_et.getText().toString().trim();
                int tMobile = Utils.getMobileOp(mobileNum);

                String disAmount= getDisAmount(tMobile, amountYuan);
                amount_discount_tv.setText(disAmount);
            }
        }
    };