Spinner subitem

Question

我想在Spinner中填充包含主文本和子文本的项目，就像Android Studio在“Designer”选项卡上构建视图时所显示的那样。

到目前为止，我只能用正文填写它。

我是通过代码来做的。使用SimpleAdapter。

我尝试了以下但没有成功，它只给了我相同的结果（只有正文）：

    Spinner spinner = (Spinner) findViewById(R.id.mySpinner);

    List<Map<String, String>> itens = new ArrayList<>();

    Map<String, String> item = new HashMap<>(2);
    item.put("text", "MAIN TEXT");
    item.put("subText", "SUB TEXT");
    itens.add(item);

    SimpleAdapter adapter = new SimpleAdapter(spinner.getContext(), itens,
            android.R.layout.simple_spinner_dropdown_item,
            new String[]{"text", "subText"},
            new int[]{android.R.id.text1, android.R.id.text2}
    );

    // i am not sure what this does
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

    spinner.setAdapter(adapter);

Answer 1

我遇到了同样的问题，并使用OP的代码作为创建此解决方案的基础：

final Spinner spinner = (Spinner)fragmentView.findViewById(R.id.spinner);
List<Map<String, String>> items = new ArrayList<Map<String, String>>();

Map<String, String> item0 = new HashMap<String, String>(2);
item0.put("text", "Browse aisles...");
item0.put("subText", "(Upgrade required)");
items.add(item0);

Map<String, String> item1 = new HashMap<String, String>(2);
item1.put("text", "Option 1");
item1.put("subText", "(sub text 1)");
items.add(item1);

Map<String, String> item2 = new HashMap<String, String>(2);
item2.put("text", "Option 2");
item2.put("subText", "(sub text 2)");
items.add(item2);

SimpleAdapter adapter = new SimpleAdapter(getActivity(), items,
        android.R.layout.simple_spinner_item, // This is the layout that will be used for the standard/static part of the spinner. (You can use android.R.layout.simple_list_item_2 if you want the subText to also be shown here.) 
        new String[] {"text", "subText"},
        new int[] {android.R.id.text1, android.R.id.text2}
);

// This sets the layout that will be used when the dropdown views are shown. I'm using android.R.layout.simple_list_item_2 so the subtext will also be shown.
adapter.setDropDownViewResource(android.R.layout.simple_list_item_2);

spinner.setAdapter(adapter);

您也可以将android.R.layout.simple_spinner_item和/或android.R.layout.simple_list_item_2替换为您自己的自定义视图（通常位于layout文件夹中）。

这是一个比PhoneGap更好的解决方案！ ：d

Answer 2

您必须创建一个自定义ArrayAdapter，为您的Spinner下拉列表创建自定义视图。此链接提供了一个很好的示例：How to customize the Spinner dropdown view