How do I know the map is ready to get used when using the SupportMapFragment?

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EDIT: getMap is deprecated now

The problem is when the call to getMap is null, when can I try again?

That depends upon the nature of the problem.

If you set up the SupportMapFragment via the <fragment> element in the layout, you can call getMap() successfully in onCreate(). But, if you create the SupportMapFragment via the constructor, that’s too soon — the GoogleMap does not yet exist. You can extend SupportMapFragment and override onActivityCreated(), as getMap() is ready by then.

However, getMap() can also return null for a bigger problem, such as Google Play Services not being installed. You would need to use something like GooglePlayServicesUtil.isGooglePlayServicesAvailable() to detect this condition and deal with it however you wish.

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