androidTextview文字监控(Textview使用方法)

mobile_et.addTextChangedListener(textWatcher);

   /**
    *实时监听用户输入的手机号，输入至最后一位后，计算折扣后的金额
    */
   TextWatchertextWatcher=newTextWatcher(){

       @Override
       publicvoidonTextChanged(CharSequences,intstart,intbefore,intcount){
           //TODOAuto-generatedmethodstub

       }

       @Override
       publicvoidbeforeTextChanged(CharSequences,intstart,intcount,
               intafter){
           //TODOAuto-generatedmethodstub

       }

       @Override
       publicvoidafterTextChanged(Editables){
           if(s.length()==11){
               StringamountYuan=amount_et.getText().toString();//用户选择的金额+元
               StringmobileNum=mobile_et.getText().toString().trim();
               inttMobile=Utils.getMobileOp(mobileNum);

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