/**
* Handle hardware (re)configurations, such as rotating the display.
*
* @throws IllegalAccessException
* @throws InstantiationException
*/
public void handleConfiguration(Class<OpsType> opsType, Interface instance)
throws InstantiationException, IllegalAccessException {
// If this method returns true it's the first time the
// Activity has been created.
if (mRetainedFragmentManager.firstTimeIn()) {
Log.d(TAG, "First time onCreate() call");
// Initialize the GenericActivity fields.
initialize(opsType, instance);
} else {
// The RetainedFragmentManager was previously initialized,
// which means that a runtime configuration change
// occured.
Log.d(TAG, "Second or subsequent onCreate() call");
// Try to obtain the OpsType instance from the
// RetainedFragmentManager.
mOpsInstance = mRetainedFragmentManager.get(opsType.getSimpleName());
// This check shouldn't be necessary under normal
// circumstances, but it's better to lose state than to
// crash!
if (mOpsInstance == null)
// Initialize the GenericActivity fields.
initialize(opsType, instance);
else
// Inform it that the runtime configuration change has
// completed.
mOpsInstance.onConfiguration(instance, false);
}
}
/**
* Initialize the GenericActivity fields.
*
* @throws IllegalAccessException
* @throws InstantiationException
*/
private void initialize(Class<OpsType> opsType, Interface instance)
throws InstantiationException, IllegalAccessException {
// Create the OpsType object.
mOpsInstance = opsType.newInstance();
// Put the OpsInstance into the RetainedFragmentManager under
// the simple name.
mRetainedFragmentManager.put(opsType.getSimpleName(), mOpsInstance);
// Perform the first initialization.
mOpsInstance.onConfiguration(instance, true);
}
