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    <p>it only lag if you press the back button?</p> <p>if thats the problem try to block the back button or make it exit the app try this code:</p> <pre><code> @Override public void onBackPressed(){ AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setMessage("You wanna leave the aplication?").setPositiveButton("Yes", dialogClickListener) .setNegativeButton("No", dialogClickListener).show(); } </code></pre> <p>or try this code its a way to put a map fragment inside another fragment (nested Map Fragment) it worked for me a weeks ago:</p> <p>Java Class:</p> <pre><code>public class Yourfragment extends Fragment { private MapView mMapView; private GoogleMap mMap; private Bundle mBundle; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View inflatedView = inflater.inflate(R.layout.map_fragment, container, false); try { MapsInitializer.initialize(getActivity()); } catch (GooglePlayServicesNotAvailableException e) { // TODO handle this situation } mMapView = (MapView) inflatedView.findViewById(R.id.map); mMapView.onCreate(mBundle); setUpMapIfNeeded(inflatedView); return inflatedView; } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mBundle = savedInstanceState; } private void setUpMapIfNeeded(View inflatedView) { if (mMap == null) { mMap = ((MapView) inflatedView.findViewById(R.id.map)).getMap(); if (mMap != null) { setUpMap(); } } } private void setUpMap() { mMap.addMarker(new MarkerOptions().position(new LatLng(0, 0)).title("Marker")); } @Override public void onResume() { super.onResume(); mMapView.onResume(); } @Override public void onPause() { super.onPause(); mMapView.onPause(); } @Override public void onDestroy() { mMapView.onDestroy(); super.onDestroy(); } } </code></pre> <p>XML:</p> <pre><code>&lt;com.google.android.gms.maps.MapView android:id="@+id/map" android:layout_width="match_parent" android:layout_height="match_parent" /&gt; </code></pre> <p>put this code on post execute:</p> <pre><code>View inflatedView = inflater.inflate(R.layout.map_fragment, container, false); try { MapsInitializer.initialize(getActivity()); } catch (GooglePlayServicesNotAvailableException e) { // TODO handle this situation } mMapView = (MapView) inflatedView.findViewById(R.id.map); mMapView.onCreate(mBundle); setUpMapIfNeeded(inflatedView); return inflatedView; </code></pre> <p>and call the assynctask on oncreateview</p> <p>Try this:</p> <pre><code>public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { //Call assyncTask } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mBundle = savedInstanceState; } private void setUpMapIfNeeded(View inflatedView) { if (mMap == null) { mMap = ((MapView) inflatedView.findViewById(R.id.map)).getMap(); if (mMap != null) { setUpMap(); } } } private void setUpMap() { mMap.addMarker(new MarkerOptions().position(new LatLng(0, 0)).title("Marker")); } @Override public void onResume() { super.onResume(); mMapView.onResume(); } @Override public void onPause() { super.onPause(); mMapView.onPause(); } @Override public void onDestroy() { mMapView.onDestroy(); super.onDestroy(); } private class GetFlightsTask extends AsyncTask&lt;Double, Void, String&gt; { @Override protected void onPreExecute() { super.onPreExecute(); // if I remove the next line, everything gets fixed loadingFlightsSpinner.show(); } @Override protected String doInBackground(Double... params) { // some pretty long remote API call // (loading a JSON file from http://some.website.com/flights?...) // works fine String flightsJSON = loadJSON("flights?flyFrom=CZ&amp;to=..."); } @Override protected void onPostExecute(String flightsJSON) { super.onPostExecute(flightsJSON); loadingFlightsSpinner.dismiss(); // here I do stuff with the JSON and then replace the fragment dohardwork() } public view dohardwork(){ View inflatedView = inflater.inflate(R.layout.map_fragment, container, false); try { MapsInitializer.initialize(getActivity()); } catch (GooglePlayServicesNotAvailableException e) { // TODO handle this situation } mMapView = (MapView) inflatedView.findViewById(R.id.map); mMapView.onCreate(mBundle); setUpMapIfNeeded(inflatedView); return inflatedView; } </code></pre>
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    1. POGoogle Maps v2 lag after popping their fragment back from stack
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    1. COFirst of all, thank you for your answer. Ending the application on pressing the _back_ button is not an option. When the `FlightsFragment` is displayed and the user presses the back button, I need to go back to the map.
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    2. COAs to the second suggested solution - I have quickly tried it and it seems to work. The map reloads everytime the fragment is popped back from stack and it doesn't lag anymore. But it loses the camera position, zoom, markers and such. I think that if I implemented saving those things and restoring them when the fragment comes back to the front, it would work nicely. The problem is that my thesis' deadline is approaching and now I don't have time to implement it anymore. Anyway, unless some better answer comes up (such that would fix it with one line of code or something), the bounty is yours.
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    3. CODo some tests to the code maybe you can get it working like you want
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