Android 避免2个相互影响的 EditText 死循环

Android 避免2个相互影响的 EditText 死循环

Android两个EditText同时设置TextChangedListener后，会使程序进入死循环，解决方法如下：

   etExchangeRateEn = (EditText) findViewById(R.id.etExchangeRateEn);
  etExchangeRateCn = (EditText) findViewById(R.id.etExchangeRateCn);

  twEN = new TextWatcher()
  {

   @Override
   public void afterTextChanged(Editable s)
   {
    etExchangeRateCn.addTextChangedListener(twCN);
   }

   @Override
   public void beforeTextChanged(CharSequence s, int start, int count, int after)
   {

   }

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

    etExchangeRateCn.setText( "CN");

   }

  };

  twCN = new TextWatcher()
  {

   @Override
   public void afterTextChanged(Editable s)
   {
    etExchangeRateEn.addTextChangedListener(twEN);

   }

   @Override
   public void beforeTextChanged(CharSequence s, int start, int count, int after)
   {
   }

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

    etExchangeRateEn.setText("EN");

   }
  };
  etExchangeRateEn.addTextChangedListener(twEN);
  etExchangeRateCn.addTextChangedListener(twCN);