Make the Application communicate with the current Activity

Question

My Android app uses its Application class (to be precise its Application subclass) to run a thread to retrieve data from a website. Once it does it successfully it is supposed to give this data to the running Activity (there are 2 activities in my app). How could I notify the Activity about this? How can I tell the current Activity that there is new available data that should be retrieved and presented? Thanks for your answers.

Answer 1

What about using a broadcast system.

You can get the context in the Application class by using getApplicationContext(); Then you can send your own custom broadcast:

Intent i = new Intent();
i.setAction("your.package.customintent.TEST");
context.sendBroadcast(i);

Then you can implement broadcast receiver in your activity's to receive the broadcast. More info here: http://thinkandroid.wordpress.com/2010/02/02/custom-intents-and-broadcasting-with-receivers/

You can set the data that you want to send in the Intent by using putExtra.
But you can also store it in a database and by using the broadcasts you let the activity know that there is new data available