第一个错误:
on sp2.setOnItemSelectedListener(new OnItemSelectedListener() {
in my else if statement我一直在犯这个错误:
新的AdapterView.OnItemSelectedListener(){}类型必须实现继承的抽象方法AdapterView.OnItemSelectedListener.onNothingSelected(AdapterView)
我在那里有onNothingSelected,它在我的if语句中有效,我的意思是我所做的只是复制,粘贴和编辑。
第二个错误:
在});
的结尾处我的其他if语句我得到错误:
语法错误,插入“;”完成声明
但一切都在那里。声明完成了!
sp1.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onItemSelecteds(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
String reg_select = (sp1.getSelectedItem().toString());
if (reg_select.contentEquals("Southwest")){
sp2.setAdapter(sw_cit_adp);
sp2.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
// TODO Auto-generated method stub
String sw_cit_select = (sp2.getSelectedItem().toString());
if (sw_cit_select.contentEquals("Lake Charles")){
sp3.setAdapter(sw_lake_charles_adp); }
else if (sw_cit_select.contentEquals("Iowa")){
sp3.setAdapter(sw_iowa_adp); }
;}
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
};});}
else if (reg_select.contentEquals("South Central")){
sp2.setAdapter(sc_cit_adp);
sp2.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
// TODO Auto-generated method stub
String sc_cit_select = (sp2.getSelectedItem().toString());
if (sc_cit_select.contentEquals("Lafayette")){
sp3.setAdapter(sc_lafayette_adp); }
else if (sc_cit_select.contentEquals("Gueydan")){
sp3.setAdapter(sc_gueydan_adp); }
;}
public void onNothingSelected(
AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
;
});
}
答案 0 :(得分:2)
你在错误的地方有这种方法。你不能选择一个项目,也不能选择任何东西,这是非感性的。
您需要将方法放在侦听器下,如onItemSelected
,但不要放在onItemSelected
内。
这应该(基本上)应该是这样的:
spinner.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
@Override
public void onItemSelected(AdapterView<?> parent, View view,
int pos, long id) {
// Your code to do something with the selected item
}
});
哦,你需要使用确切的方法名称...它是onItemSelected
不是 onItemSelecteds