我看过这个网站,这是需要自定义ListView的setOnItemSelectedListener和setOnItemClickListener如果我们想知道的SelectedItem的指数(.getSelectedItemPosition())。所以这是我做的,但它确实在SekectedItem的不是卖场的位置,而不是我一直-1 ...
I have read on this site that it is necessary to customize the setOnItemSelectedListener and setOnItemClickListener of a ListView if we want to know the Index of the SelectedItem (.getSelectedItemPosition()). So that is what I do but it does not stores the position of the SekectedItem, instead i have always -1...
我想要做的就是给用户的方式选定和项目,并点击一个按钮来删除列表中的项目。
What I want to do is just to give the user a way to delete items from a list by selected and Item and Clicking a button.
见$ C $低于C:
listViewPeople.setOnItemClickListener(new ListView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> a, View v, int i, long l) {
try {
// Remembers the selected Index
listViewPeopleId = listViewPeople.getSelectedItemPosition();
}
catch(Exception e) {
System.out.println("Nay, cannot get the selected index");
}
}
});
listViewPeople.setOnItemSelectedListener(new ListView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> a, View v, int i, long l) {
try {
// Remembers the selected Index
listViewPeopleId = listViewPeople.getSelectedItemPosition();
System.out.println("Yay, set the selected index " + listViewPeopleId);
}
catch(Exception e) {
System.out.println("Nay, cannot get the selected index " + listViewPeopleId);
}
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
try {
// Remembers nothing selected
listViewPeopleId = -1;
System.out.println("Yay, set that nothing is selected " + listViewPeopleId);
}
catch(Exception e) {
System.out.println("Nay, cannot set that nothing is selected " + listViewPeopleId);
}
}
});
什么是错?
感谢您的帮助!
克里斯托夫
推荐答案
而不是做的 listViewPeople.getSelectedItemPosition();
尝试使用INT I参数来获得索引。
Instead of doing listViewPeople.getSelectedItemPosition();
try using the int i parameter to get the index.
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