Databases
StackOverflow2013
Postsdbo
POGoogle Maps v2 lag after popping their fragment back from stack
Body
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POGoogle Maps v2 lag after popping their fragment back from stack
    text
    copied!<p>I have an <code>Activity</code> with a <code>MapFragment</code> that I add to the <code>Activity</code> programmatically using a <code>FragmentTransaction</code>:</p> <pre><code>private static final String MAP_FRAGMENT_TAG = "map"; private MapFragment mapFragment = null; ... protected void onCreate(Bundle savedInstanceState) { ... mapFragment = (MapFragment) getFragmentManager().findFragmentByTag(MAP_FRAGMENT_TAG); if (mapFragment == null) { mapFragment = MapFragment.newInstance(); FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction(); fragmentTransaction.add(R.id.fragment_wrapper, mapFragment, MAP_FRAGMENT_TAG); fragmentTransaction.commit(); } ... } </code></pre> <p>Standard way. Then I get the <code>GoogleMap</code> instance from the <code>mapFragment</code> and set its settings, set the listeners, do stuff with it. Everything works fine.</p> <p>Then when the user is done with the map, an <code>AsyncTask</code> gets triggered to show a <code>ProgressDialog</code>, perform some operation, put a different fragment into the <code>fragment_wrapper</code> and dismiss the <code>ProgressDialog</code> again:</p> <pre><code>private class GetFlightsTask extends AsyncTask&lt;Double, Void, String&gt; { @Override protected void onPreExecute() { super.onPreExecute(); // the activity context has been passed to the AsyncTask through its constructor loadingFlightsSpinner = new ProgressDialog(context); // setting the dialog up loadingFlightsSpinner.show(); } @Override protected String doInBackground(Double... params) { // some pretty long remote API call // (loading a JSON file from http://some.website.com/...) } @Override protected void onPostExecute(String flightsJSON) { super.onPostExecute(flightsJSON); // here I do stuff with the JSON and then I swtich the fragments like this FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction(); FlightsFragment fragment = new FlightsFragment(); fragmentTransaction.replace(R.id.fragment_wrapper, fragment); fragmentTransaction.addToBackStack(null); fragmentTransaction.commit(); loadingFlightsSpinner.dismiss(); } </code></pre> <p>Everything still works fine. The user does something in the <code>FlightsFragment</code> and then maybe decides to go back to the map. Presses the <em>back</em> button and the map pops up again. And this is when the map gets laggy. The countries/cities names on it load really slowly, it lags heavily on moving the map... And I have no idea why, I don't do anything on popping the <code>MapFragment</code> back.</p> <p>What's interesting is that it gets fixed for example on pressing the <em>home</em> button and then returning to the app again...</p> <p>What am I doing wrong?</p> <p>Thank you for any ideas.</p>
 

Querying!

 
Guidance
An individual column

Larger individual text columns get their own page to allow for proper reading.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload