android 关于EditText的输入监听

输入框的输入监听：输入：#73847#73647*   显示版本号
  et_Text.addTextChangedListener(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) {
    String ver="#73847#73647*";
    if(et_Text.getText().toString().equals(ver)){
     Utils.showToast(ActivityFindPassword.this, "版本号："+2.0)；
    }    
   }
  });