Question

I am trying to log the contents of an arraylist. The arraylist contains a custom object with 4 parameters. When I execute the following code I get the following log. what i want is a string of [name,class,thirty,ninety],[name,class,thirty,ninety], etc

Custom Object Class:

public class Data {
        String NAME;
        String CLASS;
        String THIRTY;//this is the thirty day supply
        String NINETY;//this is the ninety day supply

    public Data(){
        super();
    }
    public Data(String NAME, String CLASS, String THIRTY, String NINETY){
        super();
        this.NAME = NAME;
        this.CLASS = CLASS;
        this.THIRTY = THIRTY;
        this.NINETY = NINETY;
    }

    }

Activity:

ArrayList<Data> array = new ArrayList<Data>();

Cursor c = mDBHelper.getReadableDatabase().query(Constants.K_Table, null, Constants.Name +"=?", new String[] {SEARCH}, null, null, null);

            startManagingCursor(c);
            if (c.moveToFirst()){

            NAME = c.getString(c.getColumnIndex(Constants.Name));
            CLASS = c.getString(c.getColumnIndex(Constants.Class));
            THIRTY = c.getString(c.getColumnIndex(Constants.Month));
            NINETY = c.getString(c.getColumnIndex(Constants.Three_Month));

            array.add(new DrugData(NAME, CLASS, THIRTY, NINETY));
            Log.d(TAG, "array contains: "+ array.toArray().toString());
            }while(c.moveToNext());

Log:

01-28 22:31:44.742: D/Activity(23656): the array contains: [com.Data@40552050]

Answer 1

To achieve your objective to print String of object you have to do two things in your code.
1) Override toString method.

@Override
public String toString() {
    return "Data [NAME=" + NAME + ", CLASS=" + CLASS + ", THIRTY=" + THIRTY
            + ", NINETY=" + NINETY + "]";
}

2) ArrayList<Data> array is collection of Data objects. You have to specify which object you want to print. You can do that in two ways.

    int index = 0;// Index of object in the ArrayList
    Log.i("Data",array.get(index).toString());//Preferred Method to get object
    Log.i("Data",array.toArray()[index].toString());

You can loop through your array to print all Data objects like this

    for (Data data : array) {
        Log.i("Data",data.toString());
    }