How to improve fragment loading speed?

I'm using a very hackish but effective way in my application, but it works good.My mapFragment is not displayed right after the app launches! Otherwise this would not make sense.

Put this in your launcher activity's onCreate:

    // Fixing Later Map loading Delay    new Thread(new Runnable() {        @Override        public void run() {            try {                MapView mv = new MapView(getApplicationContext());                mv.onCreate(null);                mv.onPause();                mv.onDestroy();            }catch (Exception ignored){            }        }    }).start();

This will create a mapview in an background thread (far away from the ui) and with it, initializes all the google play services and map data.

The loaded data is about 5MB extra.

If someone has some ideas for improvements feel free to comment please !

Java 8 Version:

// Fixing Later Map loading Delaynew Thread(() -> {    try {        MapView mv = new MapView(getApplicationContext());        mv.onCreate(null);        mv.onPause();        mv.onDestroy();    }catch (Exception ignored){}}).start();

Just to add to @Xyaren's answer, I needed it to work for SupportFragment which seemed to require some extra steps. Have your activity implement OnMapReadyCallback.

In your onCreate:

new Thread(() -> {    try {        SupportMapFragment mf = SupportMapFragment.newInstance();        getSupportFragmentManager().beginTransaction()                .add(R.id.dummy_map_view, mf)                .commit();        runOnUiThread(() -> mf.getMapAsync(SplashActivity.this));    }catch (Exception ignored){        Timber.w("Dummy map load exception: %s", ignored);    }}).start();

You'll have to implement this:

@Overridepublic void onMapReady(GoogleMap googleMap) {    // Do nothing because we only want to pre-load map.    Timber.d("Map loaded: %s", googleMap);}

and in your activity layout:

<FrameLayout    android:id="@+id/dummy_map_view"    android:layout_width="match_parent"    android:layout_height="0dp"    android:visibility="gone"/>

It needs to go through all the steps including the transaction for Google Play Services to download the map data.

I had been running into this problem a lot too... Turns out the biggest culprit was having a debugging session attached to my app's process. The maps stuff in my app ran much faster and more smoothly when I disconnected the debugger, or just unplugged the USB cable.

Check out my related post here: First launch of Activity with Google Maps is very slow