同步（实时）监听EditText

editText.addTextChangedListener(new TextWatcher() {

   @Override

   public void onTextChanged(CharSequence arg0, int arg1, int arg2,

     int arg3) {

    // TODO Auto-generated method stub

   }

   @Override

   public void beforeTextChanged(CharSequence arg0, int arg1,

     int arg2, int arg3) {

    // TODO Auto-generated method stub

 

   }

   @Override

   public void afterTextChanged(Editable arg0) {

    // TODO Auto-generated method stub

   

   }

  });

CharSequence与Editable转化成字符串方法：

CharSequence.toString();

Editable.toString();