You cannot open a database in the assets folder. This is a virtual read-only folder located inside the APK file. You will need to first copy the database to a writable location.
Update 2018: New video tutorial: The source code is available here: https://www.b4x.com/android/forum/threads/b4x-erel-teaches-programming-video-tutorials.88787/page-2#post-577932 Async methods: [B4X] SQL with Wait For The following tutorial is obsolete: This tutorial covers the SQL...
Since you are new you deserve a break, but you are starting off on the wrong foot. Here are the reasons:
1. Do not use an image to display error messages. Use text.
2. Do not use red text on black background. Hard to read.
3. Use xCustomListView instead of Listview.
4. Use Resultset instead of cursor.
5. Do not answer by saying simply 'Thank you'. It is better if you explain how you solved it. It is more helpful to others than a hollow 'Thank you'