Develop Reference

Mapview in separate fragment android

I want to have a mapview like this suppose my main activity is like this
Here my main activity holds the instance of mapview in main activity and then when I click on it ,then a new activity should be opened with the map activity in android

You need to have the supportMapFragment in your xml file and get the reference of mapFragment into your MainFragment. The below code explains, How I accomplished the MapView inside Fragment. Write the below XML code in the mapView.xml and then Use the Fragment OnCreateView to get references.
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/mainMap"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="200dp"
/>
public class MapInFragment extends Fragment implements OnMapReadyCallback {
private View rootView;
private GoogleMap mMap;
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.mapView, container, false);
try{
SupportMapFragment mapFragment = (SupportMapFragment) getChildFragmentManager().findFragmentById(R.id.mainMap);
mapFragment.getMapAsync(MapInFragment.this);
}catch (Exception e){
e.printStackTrace();
}
return rootView;
}
#Override
public void onMapReady(GoogleMap googleMap) {
try {
mMap = googleMap;
// Add a marker in Sydney and move the camera
LatLng croplatlng = new LatLng(Double.parseDouble(latitude), Double.parseDouble(longitude));
mMap.addMarker(new MarkerOptions().position(croplatlng).title(crop + "Field"));
//mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(croplatlng,16));
CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(croplatlng , 16);
//mMap.addMarker(new MarkerOptions().position(location).title(""));
//mMap.moveCamera(CameraUpdateFactory.newLatLng(currentLocation ));
mMap.animateCamera(cameraUpdate,2000,null);
}catch (Exception e){
e.printStackTrace();
}
}
public void onDestroyView()
{
try {
Fragment fragment = (getChildFragmentManager().findFragmentById(R.id.mainMap));
if (fragment != null) {
FragmentTransaction ft = getActivity().getSupportFragmentManager().beginTransaction();
ft.remove(fragment);
ft.commit();
}
}catch (Exception e){
e.printStackTrace();
}
super.onDestroyView();
}
}

Step 1:
Add Mapview on your main activity.
Step 2:
Add OnClickListener on MapView
mMapView.getMap().setOnMapClickListener(new OnMapClickListener()
{
#Override
public void onMapClick(LatLng arg0)
{
//Open New Activity
}
});
Step 3:
Open New Activiy to show your map.
Hope you will find this answer usefull.
Happy Coading

Implementing a google map fragment to an activity

I am having a hard time implementing my google map fragment into an activity and from everything else I'me reading I'm getting more confused.
#Override
public void onStart() {
super.onStart();
try {
mListener = (OnFragmentInteractionListener) getActivity();
} catch (ClassCastException e) {
throw new ClassCastException(getActivity().toString()
+ " must implement OnFragmentInteractionListener");
}
}
This section crashes my app gives me the error must implement OnFragmentInteractionListener. Which I find confusing since I thought that since it was part of the throw it would prevent the app from crashing regardless of if the error was there.
In my main method I have
private void addMapFragment(){
android.support.v4.app.FragmentManager manager = getSupportFragmentManager();
android.support.v4.app.FragmentTransaction transaction = manager.beginTransaction();
MapFragment fragment = new MapFragment();
transaction.add(R.id.mapView, fragment);
transaction.commit();
}
Which is called in the onCreate method. Honestly I just don't exactly where to look. I feel like I have something somewhere else causing the crash but I cant figure out what it is. So I don't know if this is relevant but here is the code that also exists in the same file as the onStart method
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View v = inflater.inflate(R.layout.map_fragment, container, false);
mMapView = (MapView) v.findViewById(R.id.mapView);
mMapView.onCreate(savedInstanceState);
mMapView.onResume();
try {
MapsInitializer.initialize(getActivity().getApplicationContext());
} catch (Exception e) {
e.printStackTrace();
}
googleMap = mMapView.getMap();
//Latitude and longitude ????
double latitude = 17.385044;
double longitude = 78.486671;
MarkerOptions marker = new MarkerOptions().position(
new LatLng(latitude, longitude)).title("Hello Maps");
marker.icon(BitmapDescriptorFactory
.defaultMarker(BitmapDescriptorFactory.HUE_ROSE));
googleMap.addMarker(marker);
CameraPosition cameraPosition = new CameraPosition.Builder()
.target(new LatLng(17.385044, 78.486671)).zoom(12).build();
googleMap.animateCamera(CameraUpdateFactory
.newCameraPosition(cameraPosition));
return v;
}

Inner Map Fragment toruble when outer fragment called second time

I can access map when I call the fragment first time but when I call the fragment second time it gives me this caused by error:
12-26 09:36:41.306: E/AndroidRuntime(28156): Caused by: java.lang.IllegalArgumentException: Binary XML file line #164: Duplicate id 0x7f090012, tag null, or parent id 0x0 with another fragment for com.google.android.gms.maps.SupportMapFragment
I create the inner map fragment in my fragment class' onCreateView():
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Defines the xml file for the fragment
View view = inflater.inflate(R.layout.howtogo_fragment, container,
false);
if(map==null)
map = ((SupportMapFragment) getFragmentManager().findFragmentById(R.id.map))
.getMap();
}
here is the layout of my fragment:
<LinearLayout>
<fragment
android:id="#+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.SupportMapFragment" />
</LinearLayout>

Try this .
private static GoogleMap mMap;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
if (container == null) {
return null;
}
view = (RelativeLayout) inflater.inflate(R.layout.howtogo_fragment, container, false);
MapLoad(); // For setting up the MapFragment
return view;
}
/***** Sets up the map if it is possible to do so *****/
public static void MapLoad() {
// 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) YOURACTIVITY.fragmentManager
.findFragmentById(R.id.map)).getMap();
// Check if we were successful in obtaining the map.
if (mMap != null)
setUpMap();
}
}
private static void setUpMap() {
// For showing a move to my loction button
mMap.setMyLocationEnabled(true);
// For dropping a marker at a point on the Map
// mMap.addMarker(new MarkerOptions().position(new LatLng(latitude, longitude)).title("My Home").snippet("Home Address"));
// For zooming automatically to the Dropped PIN Location
// mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(latitude,
// longitude), 12.0f));
}

You can try my code:
xml code:
<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"
android:background="#android:color/white"
tools:context="com.example.catalyst_home.GeolocationActivity$PlaceholderFragment" >
<RelativeLayout
android:id="#+id/map_root"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</RelativeLayout>
Fragment java:
private GoogleMap mMap;
private SupportMapFragment mMapFragment;
private void setUpMapIfNeeded() {
if (mMap == null) {
mMapFragment = SupportMapFragment.newInstance();
FragmentTransaction fragmentTransaction = getChildFragmentManager()
.beginTransaction();
fragmentTransaction.add(R.id.map_root, mMapFragment);
fragmentTransaction.commit();
}
}
in onResum of fragment:
#Override
public void onResume() {
super.onResume();
new Handler().postDelayed(new Runnable() {
#Override
public void run() {
// TODO Auto-generated method stub
mMap = mMapFragment.getMap();
if (mMap != null) {
mMap.setMyLocationEnabled(true);
}
}
}, 2000);
}

replace, remove fragment and removing view doesn´t work in second run

My app selects one object of the listview and show the map. Works on first time running but in the second didn´t work. On third it works!
This is because of the inflate exception on the second time. It can´t return a view, or inflate it.
I need that every time it is selected something from the navigation drawer brings the map, im using replace and the method mentioned in many questions onDestroy, and obviusly removing the view when it is different from null.
Help would be appreciated!! Thanks!!
Code of the map:
public class mapfragmentplaces extends Fragment implements LocationListener {
protected LocationManager locationManager;
// GoogleMap googleMap;
LatLng myPosition;
private SupportMapFragment map;
private GoogleMap mMapView;
int fragVal2;
static Context ontext;
private static View view;
//lo que se ocupa para construir los sitios
String[] mPlaceType=null;
String[] mPlaceTypeName=null;
double mLatitude=0;
double mLongitude=0;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
if (view != null) {
ViewGroup parent = (ViewGroup) view.getParent();
if (parent != null) {
parent.removeView(view);
}
}
try {
view = inflater.inflate(R.layout.fragment_layout, container, false);
android.support.v4.app.FragmentManager fm = getFragmentManager();
/*
GoogleMapOptions gmo = (new GoogleMapOptions()).zoomControlsEnabled(false).rotateGesturesEnabled(false);
SupportMapFragment mapFragment = SupportMapFragment.newInstance(gmo);
android.support.v4.app.FragmentTransaction fragmentTransaction = getFragmentManager() .beginTransaction();
fragmentTransaction.add(R.id.mapFragmentHole, mapFragment);
fragmentTransaction.commit();
GoogleMap map = mapFragment.getMap(); */
map = (SupportMapFragment) fm.findFragmentById(R.id.map);
/* if (map == null) {
map = SupportMapFragment.newInstance();
fm.beginTransaction().replace(R.id.map, map).commit();
} */
// mMapView = fm.getMap();
mMapView = map.getMap();
// Enabling MyLocation Layer of Google Map
mMapView.setMyLocationEnabled(true);
// Getting LocationManager object from System Service LOCATION_SERVICE
LocationManager locationManager = (LocationManager) getActivity().getSystemService(Context.LOCATION_SERVICE);
// Creating a criteria object to retrieve provider
Criteria criteria = new Criteria();
// Getting the name of the best provider
String provider = locationManager.getBestProvider(criteria, true);
// Getting Current Location From GPS
Location location = locationManager.getLastKnownLocation(provider);
if(location!=null){
onLocationChanged(location);
}
locationManager.requestLocationUpdates(provider, 20000, 0, this);
mMapView.setOnInfoWindowClickListener(new OnInfoWindowClickListener() {
#Override
public void onInfoWindowClick(Marker marker) {
Intent intent = new Intent(getActivity(), Stores.class);
startActivity(intent);
}
});
// Clears all the existing markers
mMapView.clear();
String Lugar = "Plaza fiesta";
String Desc = "Lugar bonito";
Double Lat3 = 25.751188242782035;
Double Lng3 = -100.3097140789032;
// notificacion(Results.toString());
mMapView.addMarker(new MarkerOptions()
.position(new LatLng(Lat3,Lng3))
.icon(BitmapDescriptorFactory.fromResource(R.drawable.marker1))
.title(Lugar)
.snippet(Desc));
List<HashMap<String, String>> list = setPlaceTag.getList();
if (list!=null){
//((Menu) map).clear();
for(int i=0;i<list.size();i++){
// Creating a marker
MarkerOptions markerOptions = new MarkerOptions();
// Getting a place from the places list
HashMap<String, String> hmPlace = list.get(i);
// Getting latitude of the place
double lat = Double.parseDouble(hmPlace.get("lat"));
// Getting longitude of the place
double lng = Double.parseDouble(hmPlace.get("lng"));
// Getting name
String name = hmPlace.get("place_name");
// Getting vicinity
String vicinity = hmPlace.get("vicinity");
LatLng latLng = new LatLng(lat, lng);
// Setting the position for the marker
markerOptions.position(latLng);
// Setting the title for the marker.
//This will be displayed on taping the marker
markerOptions.title(name + " : " + vicinity);
// Placing a marker on the touched position
mMapView.addMarker(markerOptions);
}
}
} catch (InflateException e) {
/* map is already there, just return view as it is */
}
return view;
}
#Override
public void onLocationChanged(Location location) {
mLatitude = location.getLatitude();
mLongitude = location.getLongitude();
LatLng latLng = new LatLng(mLatitude, mLongitude);
mMapView.moveCamera(CameraUpdateFactory.newLatLng(latLng));
mMapView.animateCamera(CameraUpdateFactory.zoomTo(12));
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
#Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
#Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
#Override
public void onDestroyView() {
super.onDestroyView();
Fragment fragment = (getFragmentManager().findFragmentById(R.id.map));
if (fragment != null)
getFragmentManager().beginTransaction().remove(fragment).commit();
}
}
In my main activity Im calling the mapfragmentplaces with this:
private class DrawerItemClickListener implements ListView.OnItemClickListener {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
//if (dataList.get(position).getTitle() == null) {
//SelectItem(position);
// } //Toast.makeText(getApplicationContext(), "diste click a sitios", Toast.LENGTH_SHORT).show();
//Currently selected item in spinner first is airport!!!
mTitle = setPlaceTag.getTag() ;
// Creating a fragment object
mapfragmentplaces rFragment = new mapfragmentplaces();
// Creating a Bundle object
Bundle data = new Bundle();
// Setting the index of the currently selected item of mDrawerList
data.putString("position", setPlaceTag.getTag());
// Setting the position to the fragment it is the value of the spinner
rFragment.setArguments(data);
// Getting reference to the FragmentManager
android.support.v4.app.FragmentManager fragmentManager = getSupportFragmentManager();
// Creating a fragment transaction
android.support.v4.app.FragmentTransaction ft = fragmentManager.beginTransaction();
// Adding a fragment to the fragment transaction
ft.replace(R.id.content_frame, rFragment);
// Committing the transaction
ft.commit();
// Closing the drawer
mDrawerLayout.closeDrawer(mDrawerList);
}
}
My xml for maps:
<fragment
android:id="#+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.SupportMapFragment" />

Check your onCreateView method. I dont think its the correct way to inflate a xml file in oncreateview method. Please try this:
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_layout.,container,false);
//start inflating the view and return the view
map = (SupportMapFragment) getFragmentManager().findFragmentById(R.id.map);
}
A good place to utilize and use view methods is onStart of the fragment.
#Override
public void onStart() {
// TODO Auto-generated method stub
super.onStart();
mMapView = map.getMap();
}
Also I see that you are mixing the support package from the fragment. See this line:
android.support.v4.app.FragmentManager fm = getFragmentManager();
Make sure that all your import's and code for fragment are either from support package or from default package(api 11 or greater). This is a common source of bugs like classcastexception.

Error when recalling oncreateView in TabHost + fragment in android?

I am working on a app that has 4 tabs, and 1 tab is google map.
When the user click on it , it can create the map correctly, however, if the user leave the current tab by click on other tab, and come back to this tab again, it will throw exception of error inflating layout XML.
So I log the flow, I found that in the onCreateView the second time , rootview is already create, but when I add if (rootView == null) , it still throw error of "need to removeView on child view" . How to fix that? Thanks.
public class Map extends Fragment {
// Google Map
private GoogleMap googleMap;
private boolean isShowRoute;
private Database db;
private ArrayList<Restaurant> rList;
private ArrayList<Spot> sList;
View rootView;
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
Log.d("test1","" + rootView);
rootView = inflater.inflate(R.layout.map, container, false);
return rootView;
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
// TODO Auto-generated method stub
Log.d("test1","b");
super.onActivityCreated(savedInstanceState);
db = new Database (getActivity());
rList = db.getRestaurant();
sList = db.getSpot();
try {
initilizeMap();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* function to load map. If map is not created it will create it for you
* */
private void initilizeMap() {
if (googleMap == null) {
googleMap = ((MapFragment) getActivity().getFragmentManager().findFragmentById(R.id.map)).getMap();
// check if map is created successfully or not
if (googleMap == null) {
Toast.makeText(getActivity().getApplicationContext(),"Sorry! unable to create maps", Toast.LENGTH_SHORT).show();
} else {
googleMap.setMyLocationEnabled(true);
googleMap.getUiSettings().setCompassEnabled(true);
googleMap.getUiSettings().setMyLocationButtonEnabled(true);
if (isShowRoute)
showRoute();
else
pinMap();
}
}
}
private void showRoute() {
// if (RunTracker.routePoints.size() > 1){
// Polyline route = googleMap.addPolyline(new PolylineOptions()
// .geodesic(true));
// route.setPoints(RunTracker.routePoints);
//
// LatLng lastLatLng = RunTracker.routePoints.get(RunTracker.routePoints.size() - 1);
// googleMap.addMarker(new MarkerOptions().position(lastLatLng).title("You are here"));
// googleMap.moveCamera( CameraUpdateFactory.newLatLngZoom(lastLatLng, 16.0f) );
// }
}
private void pinMap() {
for (Restaurant r : rList) {
MarkerOptions marker = new MarkerOptions().position(new LatLng(r.lat, r.lng)).title(r.name);
marker.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_ORANGE));
googleMap.addMarker(marker);
}
for (Spot s : sList) {
MarkerOptions marker = new MarkerOptions().position(new LatLng(s.lat, s.lng)).title(s.name);
marker.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_GREEN));
googleMap.addMarker(marker);
}
googleMap.moveCamera( CameraUpdateFactory.newLatLngZoom(new LatLng(22.3079136,114.1778376), 10.0f) ); // go to MK MTR station by default
}
#Override
public void onResume() {
super.onResume();
initilizeMap();
}
}
Log cat
03-31 14:53:56.669: E/AndroidRuntime(4611): android.view.InflateException: Binary XML file line #6: Error inflating class fragment
Caused by: java.lang.IllegalArgumentException: Binary XML file line #6: Duplicate id 0x7f050006, tag null, or parent id 0xffffffff with another fragment for com.google.android.gms.maps.MapFragment
Layout
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<fragment
android:id="#+id/map"
android:name="com.google.android.gms.maps.MapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</RelativeLayout>
Update Code:
#Override
public void onActivityCreated(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onActivityCreated(savedInstanceState);
db = new Database (getActivity());
if (rList == null && sList == null) {
rList = db.getRestaurant();
sList = db.getSpot();
}
}
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.map, container, false);
try {
initilizeMap();
} catch (Exception e) {
e.printStackTrace();
}
return rootView;
}

#Override
public void onDestroyView() {
super.onDestroyView();
if (mMap != null) {
getActivity().getSupportFragmentManager().beginTransaction().remove(getActivity().getSupportFragmentManager().findFragmentById(R.id.map)).commit();
mMap = null;
}
}
The mapfragment's id must be removed from the FragmentManager
or else if the same it is passed on the next time then
app will crash

You can't add fragment inside a fragment. From Android document
Note: You cannot inflate a layout into a fragment when that layout includes a . Nested fragments are only supported when added to a fragment dynamically.
You get MapFragment from activity but after you change tab your fragment's life cycle changed, not activity. When you select tab 1 (MapFragment), it will try to get MapFragment again.
So you should try
googleMap = ((MapFragment) getChildFragmentManager().findFragmentById(R.id.map)).getMap();
or you should remove MapFragment from fragment manager of activity.
Link

user782104 is correct that solved my same problem! I'm my case i was using a fragment so its:
#Override
public void onDestroyView() {
super.onDestroyView();
if(mMap != null)
{
getFragmentManager().beginTransaction().remove(getFragmentManager().findFragmentById(R.id.mapFrag)).commit();
mMap = null;
}
}