Question

I have a function to read data from db.but this always returns error..i dont have much knowledge in android..looking for some help

10-03 11:33:05.870: E/AndroidRuntime(1321): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.projects.myworldsafe/com.projects.myworldsafe.DeailedView}: android.database.CursorIndexOutOfBoundsException: Index 0 requested, with a size of 0

.

String getItemDetailsWp(String id){
System.out.print(id);
SQLiteDatabase db = this.getReadableDatabase();
String[] params=new String[]{id};
String selectQuery = "SELECT Content  FROM " + TABLE_ITEMS +" WHERE "+ITEM_ID+"=?";
Cursor c=db.rawQuery(selectQuery,params);   
 c.moveToFirst();
 int index= c.getCount();
 int indexd= c.getColumnIndex(ITEM_CONTENT); 
 System.out.print("Count query"+indexd);
 return c.getString(index);
}

Answer 1

use this:

return c.getString(indexd);

it is what you actually want to get value of. you used index there,which returns number of record in your cursor.

also better practice is:

String getItemDetailsWp(String id){
System.out.print(id);
SQLiteDatabase db = this.getReadableDatabase();
String[] params=new String[]{id};
String selectQuery = "SELECT Content  FROM " + TABLE_ITEMS +" WHERE "+ITEM_ID+"=?";
Cursor c=db.rawQuery(selectQuery,params);   
if(c.getCount()>0){
    c.moveToFirst();
    int index= c.getCount();
    int indexd= c.getColumnIndex(ITEM_CONTENT); 
    System.out.print("Count query"+index);// use index instead of indexd to print total records in query
    return c.getString(index);// return value of column number specified in indexd
}
else
    return "";// when no records found
}