Catching the Lob

In Chapter 31, we showed how the service sends a broadcast to let the activity know a change was made to the forecast based on movement. Now, we can see how the activity receives and uses that broadcast.

Here are the implementations of and for :

Public onResume

Super onResume

RegisterReceiver

New IntentFilter

Public onPause

Super onPause

UnregisterReceiver

In , we register a static to receive matching the action declared by the service. In , we disable that , since we will not be receiving any such while paused, anyway.

The , in turn, simply arranges to update the forecast on the UI thread:

Private new BroadcastReceiver

Public onReceive

RunOnUiThread new Runnable

Public run

UpdateForecast

And uses the interface stub to call into the service and retrieve the latest forecast page, also handling the case where the forecast is not yet ready ():

Private updateForecast

Try

GetForecastPage

If null

PostDelayed new Runnable

Public run

UpdateForecast

Toast

MakeText this show

Else

LoadDataWithBaseURL null

Null

Catch final

OnServiceDisconnected null

RunOnUiThread new Runnable

Public run

GoBlooey

CHAPTER 32