First launch of Activity with Google Maps is very slow

Question

I want to have SupportMapFragment in one of my Activity. I add this fragment directly to layout xml and this layout set as content view. But when Activity is launched for th

Answer 1

For me it was way slower than 1sec beause i was using:

mapFragment.getMap();

Then i changed to:

 mapFragment.getMapAsync(new OnMapReadyCallback() {
        @Override
        public void onMapReady(GoogleMap googleMap) {
            map = googleMap;
        }
 });

Using the getMapAsync() it won't block the ui, so your activity will load before the map. It's still slow, but at least you can show a loading message.

Answer 2

Ok so I just had the same issue and think, after viewing this question, that there is no 'nice' solution.

My current hack is to delay adding the fragment, giving the Activity a chance to render everything else before adding the map.

Now, I am embedding the map as a childfragment, so my code looks like this:

    // inside onCreateView
    new Handler().postDelayed(new Runnable() {

        @Override
        public void run() {
            if (isAdded()) {
                FragmentManager fm = getChildFragmentManager();
                GoogleMapFragment mapFragment = GoogleMapFragment
                        .newInstance();
                fm.beginTransaction()
                        .replace(R.id.mapContainer, mapFragment).commit();
            }
        }
    }, 1000);

if adding directly to Activity it might look like this:

    // inside onCreate
    new Handler().postDelayed(new Runnable() {

        @Override
        public void run() {
            if (!isFinishing()) {
                FragmentManager fm = getFragmentManager();
                GoogleMapFragment mapFragment = GoogleMapFragment
                        .newInstance();
                fm.beginTransaction()
                        .replace(R.id.mapContainer, mapFragment).commit();
            }
        }
    }, 1000);

Nevertheless, a check inside the Runnable is needed to ensure that we are not trying to add the map to some non-existing Activity or Fragment.

I am not a fan of hardcoded delays like this, so will return if I come up with something better. 1 second should be plenty though and could probably be even less.

Answer 3

I have a "main" activity - and an activity with mapView. When that activity-with-mapView starts for a first time, it is really slow.

clocksmith's post gave me an idea to start initialization from main activity in a separate thread. And it really solves the problem.

Here is my code from "main" activity:

public void onCreate(Bundle savedInstanceState) {
    ...

    Runnable initMap = () -> {
        BaseApplication.d("Start init mapView");
        MapView mapView = new MapView(MainActivity.this);
        mapView.onCreate(null);
        BaseApplication.d("... done");
    };
    new Thread(initMap).start();
}

mapView is never used - it's only for initialization purpose.

And here is a stack trace - just for info:

12-09 19:31:54.442 17172-17341/my.app D/XXX: Start init mapView
12-09 19:31:54.525 17172-17341/my.app I/zzy: Making Creator dynamically
12-09 19:31:55.007 17172-17341/my.app D/ChimeraCfgMgr: Reading stored module config
12-09 19:31:55.153 17172-17341/my.app D/ChimeraCfgMgr: Loading module com.google.android.gms.maps from APK /data/user/0/com.google.android.gms/app_chimera/chimera-module-root/module-71c764a6f3cb92bdc5525a965b589e7c5ed304f3/MapsModule.apk

12-09 19:31:55.154 17172-17341/my.app D/ChimeraModuleLdr: Loading module APK /data/user/0/com.google.android.gms/app_chimera/chimera-module-root/module-71c764a6f3cb92bdc5525a965b589e7c5ed304f3/MapsModule.apk
12-09 19:31:55.262 17172-17341/my.app D/ChimeraFileApk: Primary ABI of requesting process is armeabi-v7a
12-09 19:31:55.271 17172-17341/my.app D/ChimeraFileApk: Classloading successful. Optimized code found.
12-09 19:31:55.316 17172-17341/my.app W/System: ClassLoader referenced unknown path: /data/user/0/com.google.android.gms/app_chimera/chimera-module-root/module-71c764a6f3cb92bdc5525a965b589e7c5ed304f3/native-libs/armeabi-v7a

12-09 19:31:55.317 17172-17341/my.app W/System: ClassLoader referenced unknown path: /data/user/0/com.google.android.gms/app_chimera/chimera-module-root/module-71c764a6f3cb92bdc5525a965b589e7c5ed304f3/native-libs/armeabi
12-09 19:31:55.618 17172-17341/my.app I/Google Maps Android API: Google Play services client version: 7571000
12-09 19:31:55.630 17172-17341/my.app I/Google Maps Android API: Google Play services package version: 8489438
12-09 19:31:55.969 17172-17341/my.app I/e: Token loaded from file. Expires in: 423267993 ms.
12-09 19:31:55.969 17172-17341/my.app I/e: Scheduling next attempt in 422967 seconds.
12-09 19:31:56.338 17172-17341/my.app D/XXX: ... done

As we can see, it realy takes a lot of time...