How to send data from an activity to a Fragment in Android using interfaces?

Question

The android Fragments tutourial teaches how to send data from a fragment to activity in using Interfaces. I don't understand interfaces that much and NOBODY gives a good example of how to use them not even docs.oracle.com. What I want to know is how to recreate something like LocationListener, where I:

1) implement the interface in class A

2) set the handler for example :setInterfaceHandler(this) in class A

3) add my implementation of the interface in class A foe Example:

public void onSomethingHappened(String s)
{
  // do this
}

4) periodically have class B fire off events that will be caught by the handler class in A

For example: Android will periodically give my activity location updates (Dont know how to do this).

http://stackoverflow.com/a/9977370/1339473 see this one... is good tutorial — QuokMoon, Jul 15 '13 at 06:32

score 1 · Accepted Answer · answered Jul 15 '13 at 06:29

Of course you can use Java language mechanisms and design patterns for your purpose (interfaces, handlers, ...) ... or you might have a look at some dedicated Android framework solutions for your problem like:

With these approaches you are able to fire your events from class B and handle them in class A with a clean and "android like" design.

How to send data from an activity to a Fragment in Android using interfaces?

1 Answers1