Josef questions

• Disable closing AlertDialog if EditText is empty
• Bitwise shift and byte cast gives different results in Java and C#
• Get number of records in child table
• Join two tables with highest ID in second table
• Get first item of IGrouping
• SQL - How can I JOIN two tables and SUM a column based on IDs between them?
• Android devices doesn't recognize attached hardware with FTDI chip
• Fetching last insert id shows wrong number
• Get list of all checked nodes and its subnodes in treeview
• Checking if server is online from Java code

Josef answers