如何从Android中的“自定义ListView”获取被点击项的位置？

Question

I'm trying to get the position of the custom list view (after sorted from original list position). It is because the database id of the list item matches the position of the listview item. so, i need to get the sorted item's correct position matching the listview item position. I have this code.

@Override
public Object getItem(int position) {
    // TODO Auto-generated method stub
    return sampleArrayList.get(position);
}

@Override
public long getItemId(int position) {
    // TODO Auto-generated method stub
    return position;
}

But im struck out that i need to get that position into my main activity. Any help is really appreciated and thanks in advance...

Answer 1

I doubt,I completely understand your problem and what you want exactly.But i can suggest you that you can maintain HashMap for storing position-id pairs for each listview.

in your CustomAdapter:

public static HashMap<Integer,String> myList=new HashMap<Integer,String>();

in getView():

String id= (fetch _id from database);
myList.put(position, id);

And now in your main acitivity,you can retrieve _id of each listitem by putting this line in onClick() of OnItemClickListener():

 Long id=Long.parseLong(CustomAdapter.myList.get(position));

Answer 2

You can define a field in the custom adapter mCurrentPosition, set it int the method

View getView(final int position, View convertView, ViewGroup parent) {<
this.mCurrentPosition = position;
....
}

Access this field from the activity.