Database listview how to relate to the DB record

Mark Worsnop · by **Mark Worsnop** » Mon Dec 06, 2010 6:10 pm

Shoot that doesnt work. Says

The type DatabaseAdapter cannot extend or implement ArrayAdapter<?>. A supertype may not specify any wildcard

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public class DatabaseAdapter extends ArrayAdapter<?> {
    
    private Context mContext;
    private ArrayList<?> mItems;
    private int mXmlId;
           
    public DatabaseAdapter(Context context, int textViewResourceId, ArrayList<?> items) {
            super(context, textViewResourceId, items);
            this.mContext = context;
            this.mItems = items;
            this.mXmlId = textViewResourceId;
    }
 
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Mark Worsnop · by **Mark Worsnop** » Mon Dec 06, 2010 6:45 pm

Actually GRP is all over this code, not sure how to make it generic.

Also in the GetView its looking specifically for the "description" field. I guess I best make a new class like this for each set of tables.

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Using javascript Syntax Highlighting

public class DatabaseAdapter extends ArrayAdapter<Grp> {
    
    private Context mContext;
    private ArrayList<Grp> mItems;
    private int mXmlId;
           
    public DatabaseAdapter(Context context, int textViewResourceId, ArrayList<Grp> items) {
            super(context, textViewResourceId, items);
            this.mContext = context;
            this.mItems = items;
            this.mXmlId = textViewResourceId;
    }
 
 
 
    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
            View v = convertView;
            if (v == null) {
                    LayoutInflater vi = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                    v = vi.inflate(mXmlId, null);
            }
            Grp mo = mItems.get(position);
            if (mo  != null) {
                    TextView text = (TextView) v.findViewById(R.id.myTextView);
                    if (text != null) {
                            if(mo .getDescription() != null){
                                    text .setText(mo .getDescription());
                            }
                    }               
            }
            return v;
    }
}
 
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blundell · by **blundell** » Mon Dec 06, 2010 8:20 pm

Yeah exactly, here's the project I promised :-)

CustomListView.rar: Custom ListView Ex; (27.65 KiB) Downloaded 55 times

Mark Worsnop · by **Mark Worsnop** » Mon Dec 06, 2010 9:20 pm

Super thank you! I wish i had this yesterday

So you agree that this is not a generic class and can only be used for the specific MyObject

Is that correct?

blundell · by **blundell** » Mon Dec 06, 2010 10:03 pm

Yes as it only handles one type of List.

Database listview how to relate to the DB record

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