Show Marker Of Current Position In Google Maps

I want to show the current position in google maps with a marker inside a Fragment class. The map is already shown, but I get a NullpointerException, when I initialize the MapFragm

Solution 1:

Your XML File

 <FrameLayout
        android:id="@+id/mapContainer"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

Java file code

FrameLayoutmapContainer= (FrameLayout) findViewById(R.id.mapContainer);
 //show map of 40% of screenDisplayMetricsdm=newDisplayMetrics();
 getWindowManager().getDefaultDisplay().getMetrics(dm);
 LinearLayout.LayoutParamsparams=newLinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
            ViewGroup.LayoutParams.MATCH_PARENT);
    params.height = (int) ((float) dm.heightPixels * (float) 0.5);
    mapContainer.setLayoutParams(params);
    FragmentManagerfm= getFragmentManager();
    MapFragmentmapFragment= MapFragment.newInstance();
    fm.beginTransaction().replace(R.id.mapContainer, mapFragment).commit();

 mapFragment.getMapAsync(newOnMapReadyCallback() {
                @OverridepublicvoidonMapReady(GoogleMap googleMap) {
                    GoogleMapmMap= googleMap;
                    mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
                    addMarks(mMap);

Show marker on map

privatevoidaddMarks(GoogleMap googleMap) {
    LatLngBounds.Builderbuilder=newLatLngBounds.Builder();
    LatLnglatLng=newLatLng(lat1, long1);
    builder.include(latLng);
    MarkerOptionsmarkerOptions=newMarkerOptions();
    markerOptions.position(latLng);
    markerOptions.title(currentLocation);
    googleMap.addMarker(markerOptions);

    }

Solution 2:

Change this like below

<fragment
    android:id="@+id/map"
    android:layout_width="match_parent"
    android:layout_height="400dp"class="com.google.android.gms.maps.MapFragment" />

to

<fragment
    android:id="@+id/map"
    android:layout_width="match_parent"
    android:layout_height="400dp"class="com.google.android.gms.maps.SupportMapFragment" />

and

MapFragment mapFragment = (MapFragment) getFragmentManager().findFragmentById(R.id.map);

to

SupportMapFragment branchdetails_map =
                (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);