private void removeAttributesObserver(IDroneApi droneApi, IObserver observer) {
if (isStarted(droneApi)) {
try {
droneApi.removeAttributesObserver(observer);
} catch (RemoteException e) {
handleRemoteException(e);
}
}
}
public void removeMavlinkObserver(MavlinkObserver observer) {
final IDroneApi droneApi = droneApiRef.get();
if (isStarted(droneApi)) {
try {
droneApi.removeMavlinkObserver(observer);
} catch (RemoteException e) {
handleRemoteException(e);
}
}
}
public boolean performAsyncActionOnHandler(
Action action, Handler handler, AbstractCommandListener listener) {
final IDroneApi droneApi = droneApiRef.get();
if (isStarted(droneApi)) {
try {
droneApi.executeAsyncAction(action, wrapListener(handler, listener));
return true;
} catch (RemoteException e) {
handleRemoteException(e);
}
}
return false;
}
public <T extends Parcelable> T getAttribute(String type) {
final IDroneApi droneApi = droneApiRef.get();
if (!isStarted(droneApi) || type == null) return this.getAttributeDefaultValue(type);
T attribute = null;
Bundle carrier = null;
try {
carrier = droneApi.getAttribute(type);
} catch (RemoteException e) {
handleRemoteException(e);
}
if (carrier != null) {
try {
carrier.setClassLoader(contextClassLoader);
attribute = carrier.getParcelable(type);
} catch (Exception e) {
Log.e(TAG, e.getMessage(), e);
}
}
return attribute == null ? this.<T>getAttributeDefaultValue(type) : attribute;
}