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[英]How to generate a spinner in Android with different background color in each item with Java?
[英]How To Generate A Spinner in Android With Java?
我想从我的 Java 代码向我的 android 应用程序添加一个微调器,而无需触摸 xml 文件,所以我进行了一些搜索并找到了一些可以执行其中一些操作的代码,但它仍然使用“findViewById”来从中获取微调器xml,我将其替换为: Spinner spinner = new Spinner(context);
然而在代码中它有“R.layout.spinner_item”,在我的情况下如何绕过它? 代码如下所示:
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);
更新您的代码,如下所示,在运行时创建Spinner
,无需layout
文件
//Create spinner dynamically
Spinner spinner = new Spinner(context);
//Ready your data for spinner
String[] plants = new String[]{"Laceflower", "California sycamore",
"Mountain mahogany", "Butterfly weed", "Carrot weed"};
//Create ArrayAdapter for spinner with system default layout for views
ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(
this,
android.R.layout.simple_spinner_item,
plants
);
//Attach adapter to spinner
spinner.setAdapter(spinnerArrayAdapter);
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