ExploreMapFragment.java: fix performMapReadyActions to center to user's last known location

Before this commit, fixing a previous bug caused performMapReadyActions to center the map on a default location rather than the available last known location. This commit adds code which will attempt to get the last known user location. If it cannot be retrieved, the default location is used. The map now centers properly.
ExploreMapFragment.java: remove method call that causes recursive loop
2025-11-05 09:13:55 +01:00 · 2025-05-02 18:34:22 -07:00 · 2025-05-02 17:26:28 -07:00 · 2025-05-02 16:49:12 -07:00 · 2025-05-02 16:34:07 -07:00 · 2025-05-02 16:25:33 -07:00
3 changed files with 21 additions and 6 deletions
--- a/app/src/main/java/fr/free/nrw/commons/ViewPagerAdapter.java
+++ b/app/src/main/java/fr/free/nrw/commons/ViewPagerAdapter.java
@ -18,6 +18,17 @@ public class ViewPagerAdapter extends FragmentPagerAdapter {
        super(manager);
    }

+    /**
+     * Constructs a ViewPagerAdapter with a specified Fragment Manager and Fragment resume behavior.
+     *
+     * @param manager The FragmentManager
+     * @param behavior An integer which represents the behavior of non visible fragments. See
+     *                 FragmentPagerAdapter.java for options.
+     */
+    public ViewPagerAdapter(FragmentManager manager, int behavior) {
+        super(manager, behavior);
+    }
+
    /**
     * This method returns the fragment of the viewpager at a particular position
     * @param position
--- a/app/src/main/java/fr/free/nrw/commons/explore/ExploreFragment.java
+++ b/app/src/main/java/fr/free/nrw/commons/explore/ExploreFragment.java
@ -12,6 +12,7 @@ import android.view.ViewGroup;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentPagerAdapter;
 import androidx.viewpager.widget.ViewPager.OnPageChangeListener;
 import fr.free.nrw.commons.R;
 import fr.free.nrw.commons.ViewPagerAdapter;
@ -69,7 +70,9 @@ public class ExploreFragment extends CommonsDaggerSupportFragment {
        loadNearbyMapData();
        binding = FragmentExploreBinding.inflate(inflater, container, false);

-        viewPagerAdapter = new ViewPagerAdapter(getChildFragmentManager());
+        viewPagerAdapter = new ViewPagerAdapter(getChildFragmentManager(),
+            FragmentPagerAdapter.BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT);
+
        binding.viewPager.setAdapter(viewPagerAdapter);
        binding.viewPager.setId(R.id.viewPager);
        binding.tabLayout.setupWithViewPager(binding.viewPager);
--- a/app/src/main/java/fr/free/nrw/commons/explore/map/ExploreMapFragment.java
+++ b/app/src/main/java/fr/free/nrw/commons/explore/map/ExploreMapFragment.java
@ -221,7 +221,6 @@ public class ExploreMapFragment extends CommonsDaggerSupportFragment
            binding.mapView.getController().setZoom(ZOOM_LEVEL);
        }

-        performMapReadyActions();

        binding.mapView.getOverlays().add(new MapEventsOverlay(new MapEventsReceiver() {
            @Override
@ -341,7 +340,12 @@ public class ExploreMapFragment extends CommonsDaggerSupportFragment
            !locationPermissionsHelper.checkLocationPermission(getActivity())) {
            isPermissionDenied = true;
        }
+
+        lastKnownLocation = getLastLocation();
+
+        if (lastKnownLocation == null) {
            lastKnownLocation = MapUtils.getDefaultLatLng();
+        }

        // if we came from 'Show in Explore' in Nearby, load Nearby map center and zoom
        if (isCameFromNearbyMap()) {
@ -962,9 +966,6 @@ public class ExploreMapFragment extends CommonsDaggerSupportFragment
                    -0.07483536015053005, 1f);
            }
        }
-        if (!isCameFromNearbyMap()) {
-            moveCameraToPosition(new GeoPoint(latLnge.getLatitude(), latLnge.getLongitude()));
-        }
        return latLnge;
    }
Author	SHA1	Message	Date
Jason Whitmore	a6b0ecc0b2	ExploreMapFragment.java: fix performMapReadyActions to center to user's last known location Before this commit, fixing a previous bug caused performMapReadyActions to center the map on a default location rather than the available last known location. This commit adds code which will attempt to get the last known user location. If it cannot be retrieved, the default location is used. The map now centers properly.	2025-05-02 18:34:22 -07:00
Jason Whitmore	df8585d877	ExploreMapFragment.java: remove method call that causes recursive loop Before this commit, there was a call loop that included onScroll and animateTo on the map. These two method calls caused performance issues in ExploreMapFragment. This commit breaks the call loop by removing moveCameraToPosition from getMapCenter. Also, the removed code did not fit the purpose of getMapCenter.	2025-05-02 17:26:28 -07:00
Jason Whitmore	b31a01c3ee	ExploreMapFragment.java: remove redundant method call Before this commit, performMapReadyActions() was called in both onViewCreated and onResume. In effect, the method is called twice before the user can even see the map, leading to performance issues. After this commit, the call in onViewCreated is removed. The method is now called only once when the user switches to the ExploreMapFragment.	2025-05-02 16:49:12 -07:00
Jason Whitmore	c44a610db9	ExploreFragment.java: modify onCreateView to use new ViewPagerAdapter constructor Before this change, onCreateView would use the old ViewPagerAdapter constructor, which had a default behavior where fragments not currently visible would be in the Resume state. After this change, the new ViewPagerAdapter constructor is used with a non-default behavior where only the visible fragment would be in the Resume state. This has performance benefits for most users since the Fragments will only be active when they want to view them.	2025-05-02 16:34:07 -07:00
Jason Whitmore	55ff68b729	ViewPagerAdapter.java: create new constructor with behavior parameter Before this commit, ViewPagerAdapter only had one constructor which used the default behavior where more than the current fragment would be in the Resume state. This commit adds a constructor where the behavior parameter can be specified.	2025-05-02 16:25:33 -07:00