要设置所选项目的微调值,返回-1
问题描述:
我使用下面的代码来设置微调值的选定项目的微调。但是我得到的位置是-1。要设置所选项目的微调值,返回-1
代码:
final ArrayAdapter<CharSequence> adapter1 = new ArrayAdapter<CharSequence>(this,android.R.layout.simple_list_item_1, location_days2);
adapter1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
location_days.setAdapter(adapter1);
String b = "5 Days";
int a = adapter.getPosition(b); //this should return 5, but returns -1
location_days.setSelection(a);
字符串数组:
私有String [] location_days2 = { “选择天”, “1天”, “2天”, “3天” ,“0天”,“5天”,“6天”};
答
int a = adapter.getPosition(b);
与适配器1在上述行更换适配器,因为你已经初始化适配器作为“适配器1”
答
你可以做这样的事情来设置选择在转
int pos = 0;
String[] location_days2 = {"Select days", "1 Day", "2 Days", "3 Days", "0 Days", "5 Days", "6 Days"};
for (String location : location_days2) {
if (location.equalsIgnoreCase("5 Days")) {
pos = Arrays.asList(location_days2).indexOf("23");
break;
}
}
location_days.setSelection(pos);
呀它现在工作。这是一个愚蠢的@sathiya –