I have an Activity (which inflates a map fragment) which implements the GoogleMap.onCameraChangedListener, and I have overriden the onCameraChange method.
The problem is that whenever I move across the map, i.e. the camera position changes, the onCameraChange method is never called.
What could be causing this?
Try this :
public class MapActivity extends AppCompatActivity implements
GoogleMap.OnCameraChangeListener{
private GoogleMap googleMap;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.googlemap_layout);
setUpMapIfNeeded();
}
#Override
public void onCameraChange(CameraPosition cameraPosition) {
double latitude = cameraPosition.target.latitude;
double longitude = cameraPosition.target.longitude;
}
private void setUpMapIfNeeded() {
if (googleMap == null) {
// Try to obtain the map from the SupportMapFragment.
googleMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();
if (googleMap != null) {
googleMap.setMyLocationEnabled(true);
googleMap.getUiSettings().setMyLocationButtonEnabled(true);
googleMap.getUiSettings().setRotateGesturesEnabled(false);
googleMap.getUiSettings().setZoomControlsEnabled(false);
googleMap.setOnCameraChangeListener(this);
}
}
}
}
Layout :
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<fragment
android:id="#+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.SupportMapFragment" />
</RelativeLayout>
Related
CustomMapFragment
public class CustomMapFragment extends SupportMapFragment {
public static final LatLng NurissLife = new LatLng(28.602012, 77.098750);
private SupportMapFragment supportMapFragment;
#Override
public void onActivityCreated(Bundle bundle) {
// FragmentManager fm=getChildFragmentManager();
supportMapFragment=SupportMapFragment.newInstance();
//supportMapFragment=(SupportMapFragment)getChildFragmentManager
//().findFragmentById(R.id.map_container);
supportMapFragment.getMapAsync(new OnMapReadyCallback() {
#Override
public void onMapReady(GoogleMap googleMap) {
googleMap.addMarker(new MarkerOptions().position
(NurissLife).title("Nuriss LifeCare"));
googleMap.moveCamera(CameraUpdateFactory.newLatLngZoom
(NurissLife, 15));
googleMap.animateCamera(CameraUpdateFactory.zoomTo(15), 2000,
null);
}
});
super.onActivityCreated(bundle);
}
}
Fragment xml
<FrameLayout 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"
android:id="#+id/map_content"
tools:context="com.demo.stuartabhi.nurisslife.Fragment.ContactFragment">
<!-- TODO: Update blank fragment layout -->
<FrameLayout
android:layout_width="match_parent"
class="com.google.android.gms.maps.SupportMapFragment"
android:layout_height="match_parent"
android:id="#+id/map_container">
</FrameLayout>
</FrameLayout>'
Marker is not working(exact location is not displaying), only world Map
is visible in Fragement
OnMapReady is not working either showing
no error in log, location code being described in OnMapReady method.
Please help regarding this, how to access the described location LatLng NurissLife inside SupportMapFragment.
Thanks in advance.
If you extend SupportMapFragment, there is no need to inflate any xml layout. Just call this.getMapAsync() in order to get a reference to the GoogleMap:
public class CustomMapFragment extends SupportMapFragment implements
OnMapReadyCallback {
private GoogleMap mMap;
public CustomMapFragment() {
}
#Override
public void onResume() {
super.onResume();
setUpMapIfNeeded();
}
private void setUpMapIfNeeded() {
if (mMap == null) {
getMapAsync(this);
}
}
#Override
public void onMapReady(GoogleMap googleMap) {
Log.d("MyMap", "onMapReady");
mMap = googleMap;
mMap.addMarker(new MarkerOptions().position(NurissLife).title("Nuriss LifeCare"));
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(NurissLife, 15));
mMap.animateCamera(CameraUpdateFactory.zoomTo(15), 2000, null);
}
}
Try this:
Create a method getCustomMapFragment() in your Activity class like this:
private SupportMapFragment getCustomMapFragment(){
SupportMapFragment supportMapFragment;
supportMapFragment= SupportMapFragment.newInstance();
supportMapFragment.getMapAsync(new OnMapReadyCallback() {
#Override
public void onMapReady(GoogleMap googleMap) {
googleMap.addMarker(new MarkerOptions().position
(NurissLife).title("Nuriss LifeCare"));
googleMap.moveCamera(CameraUpdateFactory.newLatLngZoom
(NurissLife, 15));
googleMap.animateCamera(CameraUpdateFactory.zoomTo(15), 2000,
null);
}
});
return supportMapFragment;
}
And when you perform your FragmentTransaction, try this:
...
transaction=getChildFragmentManager().beginTransaction();
transaction.add(R.id.map_container,getCustomMapFragment()).commit();
...
Also, with this implementation, the class="com.google.android.gms.maps.SupportMapFragment" line in your XML might be unnecessary.
I have a map in my layout which when clicked should addmarker to it and display it on map.But the onMapClick method is not triggered when clicked.Below is the code":
Details.java:
public class Details extends AppCompatActivity implements OnMapReadyCallback,GoogleMap.OnMapClickListener {
SupportMapFragment mapFragment;
private GoogleMap map;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.details);
mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map1);
mapFragment.getMapAsync(this);
}
#Override
public void onMapReady(GoogleMap googleMap) {
map=googleMap; LatLng bolg = new LatLng(9.984616,76.267082);
map.addMarker(newMarkerOptions().position(bolg).title("Demo")).showInfoWindow(); map.moveCamera(CameraUpdateFactory.newLatLng(bolg));
map.animateCamera(CameraUpdateFactory.zoomTo(7), 3000, null);
map.setMapType(GoogleMap.MAP_TYPE_NORMAL);
}
#Override
public void onMapClick(LatLng latLng) {
Log.e("LongClick","clicked");
map.addMarker(new MarkerOptions().position(latLng).title("X")).showInfoWindow();
map.moveCamera(CameraUpdateFactory.newLatLng(latLng));
map.animateCamera(CameraUpdateFactory.zoomTo(7), 3000, null);
map.setMapType(GoogleMap.MAP_TYPE_NORMAL);
}
}
details.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<fragment
android:layout_width="match_parent"
android:layout_height="200dp"
android:id="#+id/map1"
android:name="com.google.android.gms.maps.SupportMapFragment">
</fragment>
</LinearLayout>
To detect user click event on GoogleMap, modify the AppCompatActivity
implements OnMapClickListener, override onMapClick(LatLng point), and
call map.setOnMapClickListener(this).
map.setOnMapClickListener(this);
In your onMapReady set an on click listener map.setOnclicklistener
After getting google map from mapfragment you need to do the following for receiving click events.
GoogleMap mGoogleMap = mapFragment.getMap();
mGoogleMap.setOnMapClickListener(this);
you need to implement this listener also GoogleMap.OnMapClickListener
Started working with Android Studio, trying to display a Google Map in a fragment. The maps displays fine and I'm able to zoom/move the map around, but my markers will not display.
Here is my MapsActivity (HomePageMapsActivity.java):
public class HomePageMapsActivity extends FragmentActivity {
private GoogleMap mMap; // Might be null if Google Play services APK is not available.
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home_page_maps);
setUpMapIfNeeded();
}
#Override
protected void onResume() {
super.onResume();
setUpMapIfNeeded();
}
/**
* Sets up the map if it is possible to do so, and the map has not already been instantiated.
* If not installed {#link SupportMapFragment} (and
* {#link com.google.android.gms.maps.MapView MapView}) will prompt user to
* install/update the Google Play services APK on their device.
*/
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();
// Check if we were successful in obtaining the map.
if (mMap != null) {
setUpMap();
}
}
}
/**
* This is where we can add markers, lines, listeners, or move the camera.
* Only call once and when sure {#link #mMap} is not null.
*/
private void setUpMap() {
mMap.addMarker(new MarkerOptions().position(new LatLng(33, -84)).title("Atlanta"));
}
}
The xml (activity_home_page_maps.xml):
<?xml version="1.0" encoding="utf-8"?>
<fragment
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:map="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/map"
class="com.google.android.gms.maps.SupportMapFragment"
tools:context="net.datanetics.campusresponseapp.HomePageMapsActivity" />
The home page xml (activity_home_page):
<LinearLayout
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"
android:orientation="vertical"
android:gravity="center">
<fragment
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/HomePageMap"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="9"
tools:context=".HomePageMapsActivity"
class="com.google.android.gms.maps.SupportMapFragment" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:orientation="horizontal"
android:weightSum="1" >
<Button
android:id="#+id/MenuButton"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.5"
android:background="#3498DB"
android:text="Menu"
android:textColor="#FFFFFF" />
<Button
android:id="#+id/EmergencyButton"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.5"
android:background="#C1392B"
android:text="Emergency"
android:textColor="#FFFFFF" />
</LinearLayout>
Are you sure, your GoogleMap is not null? Try to get map asynchronously:
public class YourActivity extends AppCompatActivity implements OnMapReadyCallback {
private GoogleMap mMap;
SupportMapFragment fragMap;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home_page_maps);
fragMap = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
fragMap.getMapAsync(this);
}
#Override
public void onMapReady(final GoogleMap map) {
if (map != null) {
mMap = map;
setUpMap();
}
}
}
Two things:
1) You are trying to use the map too early. You need to have the view
first, so your code should be in onCreateView() not onCreate().
Correction: onCreateView() applies to fragments, not activities.
The app I used to test this used a Fragment to hold the map, not a
FragmentActivity.
2) I found I needed to prod the initialization of the map layers by
calling mMapView.onCreate() and mMapView.onResume() explicitly. See
also JoelLipman.com.
public class HomePageMaps extends SupportMapFragment {
private View mView;
private View mMapView;
private GoogleMap mMap;
#Override public View onCreateView(LayoutInflater inflater, ViewGroup group, Bundle state) {
super.onCreateView(inflater, group, state);
mView = inflater.inflate(R.layout.activity_home_page_maps, group, false);
mMapView= (MapView)mView.findViewById(R.id.map);
mMapView.onCreate(state);
mMapView.onResume();
mMap= mMapView.getMap();
mapUpdate();
return (mView);
}
private void mapUpdate() {
LatLng myLoc= new LatLng(33,-84);
MarkerOptions opt = new MarkerOptions();
mMap.clear();
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(myLoc, 15));
mMap.addMarker(opt.position(myLoc).title("Me"));
}
}
I got your issue change this line
mMap.addMarker(new MarkerOptions().position(new LatLng(33, -84)).title("Atlanta"));
to
mMap.addMarker(new MarkerOptions().position(new LatLng(33.7550,84.3900)).title("Atlanta"));
you have to pass the double value in lat and lng.
I found my "FirstMap" project, hope it helps. You will want to
move your map into a fragment sooner rather than later.
MapsActivity.java
public class MapsActivity extends FragmentActivity {
private PageMap mPageMap;
public interface IAction {
boolean onClick(int BtnID);
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mPageMap= new PageMap();
setContentView(R.layout.activity_main);
}
public void onClick(View Ctrl) {
int BtnID= Ctrl.getId();
switch(BtnID) {
case R.id.MainBtn_Map: ShowMap(); break;
default: mPageMap.onClick(BtnID);
}
}
private void ShowMap() {
LoadPage(mPageMap);
}
public void LoadPage(Fragment NewPage) {
FragmentManager Mgr= getSupportFragmentManager();
FragmentTransaction Action= Mgr.beginTransaction();
Action.replace(R.id.Main_FragmentContainer,NewPage);
Action.show(NewPage);
Action.commit();
}
}
res/layout/activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<Button
android:id="#+id/MainBtn_Map"
android:onClick="onClick"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_margin="20dp"
android:text="Load Map"
/>
<LinearLayout
android:id="#+id/Main_FragmentContainer"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:background="#color/material_blue_grey_800"
>
</LinearLayout>
</LinearLayout>
PageMap.java
public class PageMap extends SupportMapFragment implements MapsActivity.IAction {
private FragmentActivity mActivity;
private MapView mMapView;
private GoogleMap mMap;
#Override public void onAttach(Activity parent) {
mActivity= (FragmentActivity)parent;
super.onAttach(parent);
}
#Override public View onCreateView(LayoutInflater inflater, ViewGroup group, Bundle instance) {
super.onCreateView(inflater,group,instance);
View view= inflater.inflate(R.layout.page_map,group,false);
mMapView= (MapView)view.findViewById(R.id.map);
mMapView.onCreate(instance);
mMapView.onResume();
mMap= mMapView.getMap();
return(view);
}
public boolean onClick(int BtnID) {
switch(BtnID) {
case R.id.PageMap_BtnUpdate: return (Update());
}
return (false);
}
private boolean Update() {
setUpMap();
return(true);
}
private void setUpMap() {
if(mMap!=null) {
LatLng loc = new LatLng(-34, 151);
mMap.addMarker(new MarkerOptions().position(loc).title("Marker"));
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(loc, 15));
}
}
}
//EOF: PAGEMAP.JAVA
res/layout/page_map.xml
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
>
<Button
android:id="#+id/PageMap_BtnUpdate"
android:onClick="onClick"
android:text="Update"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<com.google.android.gms.maps.MapView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
/>
</LinearLayout>
I'm trying to initialize a GoogleMap instance, but SupportMapFragment returns null.
Here is my MainActivity Class:
public class MainActivity extends FragmentActivity
{
GoogleMap gMap;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
initMap(); //here is the NullPointerExeption
setContentView(R.layout.activity_map);
}
public boolean initMap()
{
if (gMap == null) {
SupportMapFragment mapFrag =
(SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.fragMap);
gMap = mapFrag.getMap();
}
return (gMap != null);
}
}
And this is my activity_map.xml:
<?xml version="1.0" encoding="utf-8"?>
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:map="http://schemas.android.com/apk/res-auto"
android:id="#+id/fragMap"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent" />
what is the problem? if I comment out the initMap() function, it works fine and displays the map.
I think you should change the order like
setContentView(R.layout.activity_map);
initMap();
First you should setContentView(R.layout.activity_map); and then reference Map from SupportMapFragment.
I want to add one Marker in Google map. I successfully loaded map in my app but when I tried to add a Marker, the app got crashed. I don't know why. Please some one help me!
My code:
public class BasicMapActivity extends FragmentActivity {
private GoogleMap mMap;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.basic_demo);
setUpMap();
}
#Override
protected void onResume() {
super.onResume();
}
private void setUpMap() {
mMap.addMarker(new MarkerOptions().position(new LatLng(0, 0)).title("Marker"));
}
}
Layout.xml file:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<fragment
android:id="#+id/map2"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
class="com.google.android.gms.maps.SupportMapFragment" />
</LinearLayout>
Create a method setUpMapIfNeeded() and called on onResume() and onCreate()
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();
// Check if we were successful in obtaining the map.
if (mMap != null) {
setUpMap();
}
}
}
First you need to obtain the map from the SupportMapFragment and then you add Marker into map using
mMap.addMarker(new MarkerOptions().position(new LatLng(Your_lat, Your_long)).title("Marker"));
Try This
private void setUpMap() {
Marker pos_Marker = googleMap.addMarker(new MarkerOptions().position(starting).icon(BitmapDescriptorFactory.fromResource(R.drawable.ic_laumcher)).title("Starting Location").draggable(false));
pos_Marker.showInfoWindow();
}