文字变更监听器上的android

你可以添加一个检查以仅在字段中的文本不为空时（即，长度不为0时）清除。

field1.addTextChangedListener(new TextWatcher() {   @Override   public void afterTextChanged(Editable s) {}   @Override       public void beforeTextChanged(CharSequence s, int start,     int count, int after) {   }   @Override       public void onTextChanged(CharSequence s, int start,     int before, int count) {      if(s.length() != 0)        field2.setText("");   }  });field2.addTextChangedListener(new TextWatcher() {   @Override   public void afterTextChanged(Editable s) {}   @Override   public void beforeTextChanged(CharSequence s, int start,     int count, int after) {   }   @Override   public void onTextChanged(CharSequence s, int start,     int before, int count) {      if(s.length() != 0)         field1.setText("");   }  });