Question

I want to ask about how to store data retrieved from a cursor object in an array. I am unable to do that and getting an null pointer exception because I am not able to initialize the size of the array? Where do I write that code and store all the data retrieved from cursor object in an array. Please I am unable to do that.

My code for retrieving the data from the cursor is below.

if (c != null ) {
    if  (c.moveToFirst()) {
        do {
            firstName = c.getString(c.getColumnIndex("FirstName"));
            int age = c.getInt(c.getColumnIndex("Age"));
            //results.add("Name: " + firstName + ",Age: " + age);
        }while (c.moveToNext());
    } 
}           

Answer 1

The problem is, that you have two values that you want to store. So a normal array will not solve the problem. You can use an ArrayList of a custom class. Or you use the Pair class.

Try this:

if (c != null ) {
    ArrayList<Pair<String, String>> list = new ArrayList<Pair<String, String>>();
    if  (c.moveToFirst()) {
        do {
            list.put(new Pair<c.getString(c.getColumnIndex("FirstName"), c.getInt(c.getColumnIndex("Age")>));
            //firstName = c.getString(c.getColumnIndex("FirstName"));
            //int age = c.getInt(c.getColumnIndex("Age"));
            //results.add("Name: " + firstName + ",Age: " + age);
        }while (c.moveToNext());
    } 
}