How is Facebook Chat Heads implemented?


This question already has an answer here:


Search for permission android.permission.SYSTEM_ALERT_WINDOW and WindowManager.LayoutParams.TYPE_SYSTEM_ALERT.

See this blogpost by Daniel Jankowski and his WindowHead sample on GitHub.

In addition to the duplicate answer already listed, also see:

Need Your Help

Change varchar to boolean in PostgreSQL

postgresql database-design query-optimization storage postgresql-9.1

I've started working on a project where there is a fairly large table (about 82,000,000 rows) that I think is very bloated. One of the fields is defined as:

Select statement to find duplicates on certain fields

sql sql-server tsql sql-server-2008

Can you help me with SQL statements to find duplicates on multiple fields?