What is the primary function of a Handler in Android development? (Advanced)
#1: To manage the application lifecycle
#2: To process user input
#3: To schedule messages and run code in a thread
#4: To handle database connections
What is the main purpose of the `postDelayed` method in a Handler? (Hard)
#1: To run a task immediately
#2: To schedule a task to run at a specific time
#3: To schedule a task to run after a specified delay
#4: To cancel a running task