Override the Numpad_Dot

Question

我有4个编辑文本；oct1，oct2，oct3，oct4。这些编辑文本是numberDecimal类型。我最初关注oct1。我需要它，所以当用户按.（NUMPAD点）时，它将 not 输入. oct the Oct，清除重点并专注于下一个编辑文本。

这个应该很容易，但对我来说令人沮丧。这就是我尝试的。

覆盖onKeyDown。这甚至不会产生日志。

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
       if(keyCode == KeyEvent.KEYCODE_NUMPAD_DOT){
          oct3.clearFocus();
          oct4.requestFocus();
          return true;
       }
       Log.d("KeyCode", String.valueOf(keyCode));
       Log.d("event", String.valueOf(event));
       return false;
}

然后。我有许多不同的变体。我已经能够切换焦点，但不能删除.。

    oct3.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {
            //do nothing
        }
        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {
            if(count > 0){
                if(s.charAt(s.length()-1) == ".".charAt(0)){
                    Log.d("Sequence", "Noticed a "."");
                    isPeriod = true;
                } else {
                    Log.d("Sequence", "Noticed a ""+s+""");
                }
            }
        }
        @Override
        public void afterTextChanged(Editable s) {
            if(isPeriod){
                s.delete(s.length() -1, s.length() -1);
                oct3.clearFocus();
                isPeriod = false;
                oct4.requestFocus();
            }
        }
    });

Answer 1

尝试在onTextChanged中设置它：

  listener = (new TextWatcher() {
        @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(count > 0){
                if(s.charAt(s.length()-1) == '.'){
                    Log.d("Sequence", "Noticed a "."");
                    CharSequence text = s.subSequence(0, s.length()-1);
                    Log.d("VIEW CLICKED:", String.valueOf(getCurrentFocus()));
                    setTextAndAdvance(getCurrentFocus(), text);
                } else {
                    Log.d("Sequence", "Noticed a ""+s+""");
                }
            }
        }
        @Override
        public void afterTextChanged(Editable s) {
        }
    });