I get weird exception when retrieve image from SQLite database

Here is what I did:

I created an column (blob type) and saved successfully the byte array into it. Then I got the image by this code:

    cursor.moveToFirst();
    theme = cursor.getBlob(cursor.getColumnIndex("Theme"));  
    bitmap = BitmapFactory.decodeByteArray(theme, 0, theme.length);
    screenBackGround.setBackground(new BitmapDrawable(getResources(), bitmap));

• NOTE: There is just 1 row.

At 1st try:

• I used an 500x500 (12.6KB) image and it worked.

Then 2nd try:

• I used an 768x1280 (120KB) image and then I got this error:

  12-24 06:24:54.965: E/CursorWindow(1186): Failed to read row 0, column 1 from a CursorWindow which has 0 rows, 3 columns.

  12-24 06:24:54.965: E/AndroidRuntime(1186): java.lang.IllegalStateException: Couldn't read row 0, col 1 from CursorWindow. Make sure the Cursor is initialized correctly before accessing data from it.

I don't know why I get this exception, I thought there should be OutOfMemory exception or sth, please explain to me and teach me how to fix that. Thank you!