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POmMap.addPolyline throws illegalstateexception
 

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  1. POmMap.addPolyline throws illegalstateexception
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    <p>I have a service that listens to location changes and sends message to UI thread together with Polylineoptions, it goes like this:</p> <pre><code> //some code here Bundle bundle = new Bundle(); bundle.putParcelable("polylineOptions", mPolylineOptions); Message msg = Message.obtain(null, LOCATION_UPDATE); msg.setData(bundle); mMainHandler.dispatchMessage(msg); //some more code </code></pre> <p>mPolylineOptions contains new location together with all previous locations. in the main thread i have handleMessage method that should update my map. it gos like this:</p> <pre><code> private class MainHandler extends Handler { private MainHandler (Looper looper){ super(looper); } @Override public void handleMessage (Message msg){ switch (msg.what){ case TrackingService.LOCATION_UPDATE: if (D){Log.d(TAG, "Location update received");}; myPolylineOptions = (PolylineOptions) msg.getData().getParcelable("polylineOptions"); new Color(); myPolyline = mMap.addPolyline(myPolylineOptions .color(Color.argb(128, 255, 0, 0)) .geodesic(true)); break; } } } </code></pre> <p>i can see that handler receives the message, but I get "illegalstateexception: Not On The Main Thread" when i call</p> <pre><code> myPolyline = mMap.addPolyline(myPolylineOptions .color(Color.argb(128, 255, 0, 0)) .geodesic(true)); </code></pre> <p>Anybody has ideas how to solve this? Thanks!</p> <p>EDIT:</p> <p>I bound to service and pass to it my UI Handler like this:</p> <pre><code> private ServiceConnection mConnection = new ServiceConnection() { // Called when the connection with the service is established public void onServiceConnected(ComponentName className, IBinder service) { if (D) {Log.d(TAG, "main - onServiceConnected started");}; // Because we have bound to an explicit // service that is running in our own process, we can // cast its IBinder to a concrete class and directly access it. LocalBinder binder = (LocalBinder) service; mService = binder.getService(); mBound = true; while (mService.getThreadHandler() == null){ try { Thread.sleep(100); if(D) {Log.d(TAG, "Thread Handler is not ready");}; } catch (Exception e){} } mThreadHandler = mService.getThreadHandler(); mService.setHandler(new MainHandler(Looper.getMainLooper())); } </code></pre> <p>Code for a thread. this thread runs in a service:</p> <p>I know, this thread class is very "dirty" inelegant and unprofessional.... </p> <pre><code> private class ThreadHandler extends Handler { @Override public void handleMessage(Message msg) { switch (msg.what){ case MAIN_HANDLER: if(D) {Log.d(TAG, "main hadler received");}; break; } super.handleMessage(msg); } } public LocationThread (Context context){ mContext = context; keepOn = true; } public void cancel() { keepOn = false; if (D){Log.d(TAG, "thread was canceled");}; } public void run(){ try { Looper.prepare(); } catch (Exception e) {} // create handler for communication mThreadHandler = new ThreadHandler(); // setup location updates Location mLocation; Location lastLocation = null; PolylineOptions mPolylineOptions = new PolylineOptions(); mLocationRequest = LocationRequest.create(); mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY); // Use high accuracy mLocationRequest.setInterval(UPDATE_INTERVAL); // Set the update interval to 5 seconds mLocationRequest.setFastestInterval(FASTEST_INTERVAL); // Set the fastest update interval to 1 second mLocationClient = new LocationClient(mContext, this, this); mLocationClient.connect(); while (keepOn){ try { Thread.sleep(10000); } catch (Exception e){} if (mConnected){ if (D) {Log.d(TAG, "thread is running");}; mLocation = mLocationClient.getLastLocation(); if (lastLocation == null) { LatLng mLatLng = new LatLng(mLocation.getLatitude(), mLocation.getLongitude()); mPolylineOptions.add(mLatLng); lastLocation = mLocation; } // Report to the UI that the location was updated float distance = mLocation.distanceTo(lastLocation); if (distance &gt; 1){ LatLng mLatLng = new LatLng(mLocation.getLatitude(), mLocation.getLongitude()); mPolylineOptions.add(mLatLng); new Color(); lastLocation = mLocation; } if (hasBindedActivity){ Bundle bundle = new Bundle(); bundle.putParcelable("polylineOptions", mPolylineOptions); Message msg = Message.obtain(null, LOCATION_UPDATE); msg.setData(bundle); mMainHandler.dispatchMessage(msg); } } } Looper.loop(); } </code></pre>
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    1. USPauliusM
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    1. COThe whole getThreadHandler thing seems unnecessary to me based on this code. I think you can first of all use the constructor without parameters for your MainHandler (no need to give it the looper). Then just create a new handler by calling `mMainHandler = new MainHandler();` from within the onServiceConnected (which runs on UI thread).
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      1. POmMap.addPolyline throws illegalstateexception
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    2. COHmm.. I tried to create mMainHandler without any looper provided before posting this question. still same result.
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      1. POmMap.addPolyline throws illegalstateexception
      1. USPauliusM
    3. COCan you add the whole code? Now I can, for example, only see `mThreadHandler` being initialised, but the constructor for the `mMainHandler` is not shown.
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      1. POmMap.addPolyline throws illegalstateexception
      1. USJ.Nieminen
 

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