I have an Activity of Map Fragments that I want to convert to Fragments
public class Trees extends FragmentActivity implements GoogleMap.OnMarkerClickListener {
private GoogleMap mMap;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_trees);
setUpMapIfNeeded();
}
@Override
protected void onResume() {
super.onResume();
setUpMap();
}
private void setUpMapIfNeeded() {
// Do a null check to confirm that we have not already instantiated the map.
if (mMap == null) {
// Try to obtain the map from the SupportMapFragment.
mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
.getMap();
mMap.setMyLocationEnabled(true);
mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(latitude, longitude),17));
}
}
}
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First of all, change FragmentActivity to Fragment. Also, since the MapFragment is also a fragment, you will now have nested fragments. There are many solutions / hacks available to use a nested fragment (for your case it is a MapFragment inside a fragment). But the most recommended is to add the MapFragment dynamically to the Fragemnt . To do this, you need to follow these simple steps.
First of all, you should just have a FrameLayout in your mapfragment.xml like this
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android
android:id="@+id/fl_map"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
</FrameLayout>
Now you need to dynamically add the SupportMapFragment to your fragment
private SupportMapFragment fragment;
Inside onActivityCreated () copy this code
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
FragmentManager fm = getChildFragmentManager();
if (fragment == null) {
fragment = SupportMapFragment.newInstance();
fm.beginTransaction().replace(R.id.fl_map, fragment).commit();
}
}
since FragmentTransaction will take a while, so you need to initialize your map in onResume () like this
@Override
public void onResume() {
super.onResume();
if (mMap == null)
mMap = fragment.getMap();
try {
if (mMap != null) {
builder = new LatLngBounds.Builder();
mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
mMap.getUiSettings().setZoomControlsEnabled(false);
mMap.getUiSettings().setZoomGesturesEnabled(true);
mMap.setMyLocationEnabled(true);
// do whatever you want to do with map
}
} catch (Exception e) {
e.printStackTrace();
}
}
Also don't forget to add this code to onDetach () from snippet
@Override
public void onDetach() {
super.onDetach();
try {
Field childFragmentManager = Fragment.class
.getDeclaredField("mChildFragmentManager");
childFragmentManager.setAccessible(true);
childFragmentManager.set(this, null);
} catch (NoSuchFieldException e) {
throw new RuntimeException(e);
} catch (IllegalAccessException e) {
throw new RuntimeException(e);
} catch (Exception e) {
e.printStackTrace();
}
}
Hope this helps you.
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