Global Timer in android

Question

I want to make a timer which will be shown on every activity of my application.

I know how to make a timer on an activity below is my code

public class T         


        

Answer 1

You can have a singleton class holding your CountDownTimer

// This is not a real singleton, Google to get a proper Java implementation
public class TimerSingleton {

  // Should not be public, you should of course encapsulate access to that timer.
  // static keyword says that one timer object is shared by all instance of TimerSingleton 
  public static CountDownTimer timer = new CountDownTimer();
}

// Access to the timer from an activity:
TimerSingleton.timer.start();

Second option is to have your timer as a member of a custom Application class: Use Application class for global variables

Third option : make a local service that starts the timer when started.

Keep in mind that in case of options 1 and 2, if the OS decides to kill you app, the timer will vanish (i.e. when the activity is re-created, the CountDownTimer object will be resetted).