I am attempting to use the following method to calculate the total of all values in a certain column in my DB.
/**
* Method that gives the the total of all
* Average Meditation levels in the DB
* @return
*/
public Cursor getTotalOfAllMedLevels(){
SQLiteDatabase db = this.getWritableDatabase();
String query = "SELECT SUM(avgmeditation) FROM " + TABLE_SCORE;
Cursor c = db.rawQuery(query, null);
return c;
}
I am then trying to display the return value from the method within a TextView (avgMed) in a different Activity like so:
public void displayAverageOfAllMedValues() {
Cursor c = db.getTotalOfAllMedLevels();
avgMed.setText("" + c);
}
But get the following output in the TextView:
android.database.sqlite.SQLiteCursor@529db063
Is there a way of converting this output to an int value, or alternatively how can I change my code to give an Int output that I want.
EDIT: Current Database creation and structure:
public class DatabaseHelper extends SQLiteOpenHelper {
// Database Version
private static final int DATABASE_VERSION = 10;
// Database Name
private final static String DATABASE_NAME = "MeditationDatabase";
// Contacts table name
private static final String TABLE_SCORE = "scores";
// Contacts Table Columns names
private static final String COL_SESSION = "sessionid";
private static final String COL_GAMETITLE = "game";
private static final String COL_NAME = "name";
private static final String COL_MED = "avgmeditation";
private static final String COL_MAX = "maxmeditation";
private static final String COL_AVGATT = "avgattention";
private static final String COL_MAXATT = "maxattention";
private static final String COL_SCORE = "score";
private static final String COL_DATE = "date";
/**
* Constructor
*
* @param context
*/
public DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
/**
* Method that creates the database
*/
@Override
public void onCreate(SQLiteDatabase db) {
String CREATE_TABLE_SCORE = "CREATE TABLE " + TABLE_SCORE + "(" + COL_SESSION
+ " STRING PRIMARY KEY, " + COL_GAMETITLE + " STRING, " + COL_NAME + " STRING, " + COL_MED + " INTEGER, "
+ COL_MAX + " INTEGER, " + COL_AVGATT + " INTEGER, " + COL_MAXATT + " INTEGER, " + COL_SCORE + " INTEGER, " + COL_DATE + " STRING " + ")";
db.execSQL(CREATE_TABLE_SCORE);
}
A cursor is like an array, there are all the objects that your select found in it. You must do something like this:
public void displayAverageOfAllMedValues() {
Cursor c = db.getTotalOfAllMedLevels();
if( c != null && c.moveToFirst )
{
avgMed.setText("" + c.getInt( 0 ) );
}
}