get a position in bindView using CursorAdapter

问题

i am create a listview which has two TextView and one custom view as a selection indicator , to load data i am using CursorAdapter and overriding bindView and newView. but the issue is in preserving the selection index.

when i am tapping a list item , i am saving the position of it into view as follows

View v1=(View)view.findViewById(R.id.viewColor);
v1.setTag(position)

but inside a bindView i not getting a position where i can perform a match by fetching position from view's tag as follows

 Integer position = (Integer) v1.getTag();

but i am not getting a position to compare just the way we get in getView. i tried cur.getPosition() is the position of a record in cursor which wont match with the v1.getTag().

i tried overriding getView as follows , but not getting accurate position

@Override
public View getView(final int position, View convertView, ViewGroup parent){

    this.position = position;
    return super.getView(position, convertView, parent);


}

so how i can i get the position in bindView ? do i need to use getView or what ? i explored many threads but i didn't get any definite answer when it comes to bindView.

EDIT

        @Override
        public void onItemClick(AdapterView<?> adapter, View view, int position,
                long arg3) {


                    view.setTag(position); 
                   // i save the position on list item click so that when adapter loads the 
                   // the list i can match the position with the current one

          }

回答1:

For This first you need to override getView() and set the position here and access it in bindview() later.

@Override
public View getView(int position, View convertview, ViewGroup arg2) {
    if (convbertview == null) {
        LayoutInflater inflater = LayoutInflater.from(context);
        convertview = inflater.inflate(R.layout.your layout,
                null);
    }
    convertview.setTag(position);
    return super.getView(position, convbertview, arg2);
}

and in bindView() get your position like

@Override
public void bindView(View view, Context context, Cursor cursor) {
    int position=(Integer) view.getTag();//here is the position

}

回答2:

Don't override getView since you use CursorAdapter. You can register onClickListener in the bindView. Let's say you listen for tapping on the icon, then you do like this:

@Override
public void bindView(View vw, Context ctx, final Cursor cursor) {
    /* 
    *   do your binding
    */
    ImageView icon = (ImageView) vw.findViewById(R.id.your_icon);
    icon.setTag(cursor.getPosition());
    icon.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            // here you pass right position to your activity
            ((MainActivity) context).onIconClick((int)v.getTag());  
        }
    });
}

In your activity just:

public void onIconClick(int position) {
    // do your stuff
}

回答3:

Change your onItemClick like below

@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
    mAdapter.setId(id);
    //Set the selector here
}

Then maintain one id variable in the adapter and write the setters and getters for it. then change your bindView() method as below

@Override
public void bindView(View view, Context context, Cursor cursor) {

    long tempId = cursor.getLong(cursor.getColumnIndex("_id"));

    if(tempId==id){
        //Set the selector color here
    }
    else{
        //Set the default color here
    }

    //Remaing your logic here
}

In this way you no need to override getView() method.

If you want to select multiple views you have to maintain the ArrayList of ids...