83 lines
2.5 KiB
Java
83 lines
2.5 KiB
Java
package org.microg.nlp.api;
|
|
|
|
import android.location.Location;
|
|
import android.os.IBinder;
|
|
import android.os.RemoteException;
|
|
|
|
public abstract class LocationBackendService extends AbstractBackendService {
|
|
|
|
private Backend backend = new Backend();
|
|
private LocationCallback callback;
|
|
private Location waiting;
|
|
|
|
/**
|
|
* Called, whenever an app requires a location update. This can be a single or a repeated request.
|
|
* <p/>
|
|
* You may return null if your backend has no newer location available then the last one.
|
|
* Do not send the same {@link android.location.Location} twice, if it's not based on updated/refreshed data.
|
|
* <p/>
|
|
* You can completely ignore this method (means returning null) if you use {@link #report(android.location.Location)}.
|
|
*
|
|
* @return a new {@link android.location.Location} instance or null if not available.
|
|
*/
|
|
protected Location update() {
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Directly report a {@link android.location.Location} to the requesting apps. Use this if your updates are based
|
|
* on environment changes (eg. cell id change).
|
|
*
|
|
* @param location the new {@link android.location.Location} instance to be send
|
|
*/
|
|
public void report(Location location) {
|
|
if (callback != null) {
|
|
try {
|
|
callback.report(location);
|
|
} catch (android.os.DeadObjectException e) {
|
|
waiting = location;
|
|
callback = null;
|
|
} catch (RemoteException e) {
|
|
waiting = location;
|
|
}
|
|
} else {
|
|
waiting = location;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @return true if we're an actively connected backend, false if not
|
|
*/
|
|
public boolean isConnected() {
|
|
return callback != null;
|
|
}
|
|
|
|
@Override
|
|
protected IBinder getBackend() {
|
|
return backend;
|
|
}
|
|
|
|
private class Backend extends LocationBackend.Stub {
|
|
@Override
|
|
public void open(LocationCallback callback) throws RemoteException {
|
|
LocationBackendService.this.callback = callback;
|
|
if (waiting != null) {
|
|
callback.report(waiting);
|
|
waiting = null;
|
|
}
|
|
onOpen();
|
|
}
|
|
|
|
@Override
|
|
public Location update() throws RemoteException {
|
|
return LocationBackendService.this.update();
|
|
}
|
|
|
|
@Override
|
|
public void close() throws RemoteException {
|
|
onClose();
|
|
callback = null;
|
|
}
|
|
}
|
|
}
|