Custom SimpleCursorAdapter, database query and NullPointerException

Question

I\'m trying to make ListView populated from database, and spice each row with fancy delete button. So I made list Activity and custom SimpleCursorAdapter.

This is main Li

Answer 1

The problem is in your SMSimpleCursorAdapter code:

EditEntries dbDel = new EditEntries(); //from previous code sample

You create a new object but it won't be a managed Activity (eg. the onCreate method won't be called). The NPE probably comes from your DBAdapter when you try to create it the second time (from your Adapter).

Quick fix:

EditEntries dbDel; //from previous code sample
public SMSimpleCursorAdapter(Context context, int layout, Cursor c,
        String[] from, int[] to) {
    super(context, layout, c, from, to);

    this.c = c;
    this.context = context;
    this.activity = (Activity) context;
    this.dbDel = (EditEntries) context;
}

---

If you don't want just a quick fix the following would be a much better solution:

1. Move the delRow, getEvents method into your DBAdapter class
2. Modify the constructor of your SMSimpleCursorAdapter to give in the DBAdapter class (created in your ListActivity).