what I am trying is: to show the google map with starting and end point marks in alert dialog on external activity.
So I did:
1) Create a layout, my_dialog_view.XML for a dialog:(NOTE: this layout is apart from the main layout for the activity where a dialog is called)
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.exampleApp">
<fragment
android:id="@+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</RelativeLayout>
2) Define a view for the dialog layout:
LayoutInflater factory = LayoutInflater.from(this);
v = factory.inflate(R.layout.my_dialog_view, null);
3) Define Google map handler:
GoogleMap gmap = ((SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map)).getMap();
4) Set markers of starting and end point:
LatLng startLoc = new LatLng((double)lat,(double)lng);
CameraPosition camPos = new CameraPosition.Builder().target(startLoc)
.zoom(15).bearing(45).tilt(70).build();
CameraUpdate camUpd3 = CameraUpdateFactory.newCameraPosition(camPos);
gmap.animateCamera(camUpd3);
MarkerOptions markerOpts = new MarkerOptions().position(startLoc).title(
"Start Location");
gmap.addMarker(markerOpts);
And I have an error as follows:
Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'com.google.android.gms.maps.GoogleMap com.google.android.gms.maps.SupportMapFragment.getMap()' on a null object reference
It makes sense to have this error since the layout set for the activity (where the java code are written) does not have the fragment component that I tried to use in 3) step.
Then my question is: How to properly define a google map handler with the external dialog layout (by using LayoutInflater or any other possible solution) to resolve the null reference error?
Any input will be GREATLY appreciated.
Best,
