Question

我有以下疑问我必须在我的项目中使用一些数组列表...

列表餐厅菜肴餐厅1菜肴餐厅2价格餐厅1价格餐厅2

在我的活动中，我放了两个Spinners，一个将获得Array List Restaurants，另一个我希望它在我选择餐厅时显示Array列表的数据，最后我会选择和setaria作为文本查看价格。

只是为了了解Spinner中填充的内容

<string-array name="restaurant">
    <item>McDonalds</item>
    <item>KFC</item>
</string-array>

<string-array name="restaurant_McDonalds_Plate">
    <item>Combo Big Mac</item>
    <item>Combo Deluxe Bacon</item>
    <item>Combo Club House</item>
</string-array>

<string-array name="Restaurant_McDonalds_Plate_Price">
    <item>R$ 31,00</item>
    <item>R$ 29,00</item>
    <item>R$ 35,00</item>
</string-array>

<string-array name="Restaurant_KFC_Plate">
    <item>Combo Balde de 6 peças</item>
    <item>Combo Balde de 9 peças</item>
    <item>Combo Balde de 12 peças</item>
</string-array>

<string-array name="Restaurant_KFC_Plate_Price">
    <item>R$ 25,00</item>
    <item>R$ 35,00</item>
    <item>R$ 45,00</item>
</string-array>

Answer 1

尝试下面的代码，我已经解释并写了..

    final Spinner retaurant;
    final Spinner plate;

    final TextView txt_retaurant;
    final TextView price;

    retaurant.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {

            String restaurantname = retaurant.getSelectedItem().toString();

            txt_retaurant.setText(restaurantname);

            //if McDonalds, populates plate spinner with respective
            if(position == 0){
                ArrayAdapter<String> adapter= new ArrayAdapter<String>(view.getContext(),android.R.layout.simple_spinner_item,getResources().getStringArray(R.array.restaurant_McDonalds_Plate));
                adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
                plate.setAdapter(adapter);
            }
            //if kfc, populates plate spinner  with respective
            if(position == 1){
                ArrayAdapter<String> adapter= new ArrayAdapter<String>(view.getContext(),android.R.layout.simple_spinner_item,getResources().getStringArray(R.array.Restaurant_KFC_Plate));
                adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
                plate.setAdapter(adapter);
            }

        }

        @Override
        public void onNothingSelected(AdapterView<?> parent) {

        }
    });

    plate.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {

            // if McDonalds selected , it gets respective price list of plate and sets the price list to textview according to selected value in plate spinner
            if(retaurant.getSelectedItemPosition() == 0){
                List<String> myArrayList = Arrays.asList(getResources().getStringArray(R.array.Restaurant_McDonalds_Plate_Price));
                price.setText(myArrayList.get(position));
            }
            // if kfc selected , it gets respective price list of plate and sets the price list to textview according to selected value in plate spinner
            if(retaurant.getSelectedItemPosition() == 1){
                List<String> myArrayList = Arrays.asList(getResources().getStringArray(R.array.Restaurant_KFC_Plate_Price));
                price.setText(myArrayList.get(position));
            }
        }

        @Override
        public void onNothingSelected(AdapterView<?> parent) {

        }
    });

从另一个Spinner填充Spinner

1 个答案: