问题
I'm subscribing to a data stream that gets pushed coordinates, I want to place a marker on the map every time the listener gets a new point. What do I need to do to put the drawMarker code on the correct thread or in the correct scope?
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
enableMyLocation();
subscribe();
}
public void drawLatestPoint(LatLng p) {
System.out.println(p);
mMap.addMarker(new MarkerOptions().position(p).title("Marker in Sydney"));
}
private void subscribe(){
pubNub.subscribe()
.channels(Arrays.asList("my_channel")) // subscribe to channel groups
.execute();
pubNub.addListener(new SubscribeCallback() {
@Override
public void message(PubNub pubnub, PNMessageResult message) {
if (message.getMessage().get("lat") != null && message.getMessage().get("lng") != null) {
double lat = message.getMessage().get("lat").doubleValue();
double lng = message.getMessage().get("lng").doubleValue();
LatLng point = new LatLng(lat,lng);
drawLatestPoint(point);
}
}
});
}
回答1:
You can use runOnUiThread
to run the code in the GUI thread:
runOnUiThread(new Runnable() {
@Override
public void run() {
// Your code to run in GUI thread here
}
});
回答2:
Make sure that your pubsub has access to a Context object (can be the Application context or the Service context). Then put the required code inside the run
method :
// Get a handler that can be used to post to the main thread
Handler mainHandler = new Handler(context.getMainLooper());
Runnable myRunnable = new Runnable() {
@Override
public void run() {....} // This is your code
};
mainHandler.post(myRunnable);
Reference
来源:https://stackoverflow.com/questions/39301726/android-add-map-marker-error-java-lang-illegalstateexception-not-on-the-main-t