通过SimpleCursorAdapter在自定义ListView中显示SQL数据

i created a SQL Database and was able to safe data from three EditText Views and display it in a single TextView. Then i thought it would be way better to display the data in a custom ListView, so i followed the developer guide and tried to display the data by a simpleCursorAdapter. But it did not work...i do not get any errors or anything, the data is just not shown...I guess there must be some missing connection between the Cursor, the Adapter or the DB... i know that this kind of question is asked quite frequently, but i am unable to find my mistake, any help would be greatly appreciated:i created a SQL Database and was able to safe d