如何使用Java在Android中生成微调器？

Question

我想从Java代码中将微调器添加到我的android应用程序中，而无需触摸xml文件，因此我进行了一些搜索，找到了一些可以做到这一点的代码，但是它仍然使用“ findViewById”来获取来自xml的spinner，我将其替换为：Spinner spinner = new Spinner（context）;

但在代码中它具有“ R.layout.spinner_item”，在我的情况下，该如何绕过？代码看起来像这样：

final Spinner spinner = new Spinner(context);
String[] plants = new String[]{"Laceflower", "California sycamore", "Mountain mahogany", "Butterfly weed", "Carrot weed"};
final List<String> plantsList = new ArrayList<>(Arrays.asList(plants));
final ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(this, R.layout.spinner_item, plantsList)     <--- ?
{
  @Override
  public View getDropDownView(int position, View convertView, ViewGroup parent)
  {
    View view = super.getDropDownView(position, convertView, parent);
    TextView tv = (TextView) super.getDropDownView(position, convertView, parent);
    if (position % 2 == 1)
    {
      tv.setTextColor(Color.parseColor("#FF7C7967"));
      tv.setBackgroundColor(Color.parseColor("#FFC3C0AA"));
    }
    else
    {
      tv.setTextColor(Color.parseColor("#FF657A86"));
      tv.setBackgroundColor(Color.parseColor("#FFB5DCE8"));
    }
    return view;
  }
};

spinnerArrayAdapter.setDropDownViewResource(R.layout.spinner_item);     <--- ?
spinner.setAdapter(spinnerArrayAdapter);

Answer 1

如下更新代码以在运行时创建Spinner而没有layout文件

final Spinner spinner = new Spinner(context);
String[] plants = new String[]{"Laceflower", "California sycamore", "Mountain mahogany", "Butterfly weed", "Carrot weed"};
ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, plants);
spinner.setAdapter(spinnerArrayAdapter);