Im trying put a MapFragment inside a DialogFragment, it works fine but i dont know how can I wait until getMap()!=null... here´s my code:
public class DialogMapa extends DialogFragment{
private SupportMapFragment fragment;
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.layout_dialog_mapa, container,false);
getDialog().requestWindowFeature(Window.FEATURE_NO_TITLE);
SupportMapFragment fragment = new SupportMapFragment();
FragmentTransaction transaction = getChildFragmentManager().beginTransaction();
transaction.add(R.id.map, fragment).commit();
GoogleMap mapa = null;
try {
mapa =fragment.getMap();
} catch (Exception e) {
e.printStackTrace();
}
if (mapa==null) Toast.makeText(getActivity(), "NULL", Toast.LENGTH_SHORT).show();
return view;
}
}
and my inflate 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"
android:padding="0dp" >
<FrameLayout
android:id="#+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</FrameLayout>
</RelativeLayout>
Thanks in advance!!
So with the new maps framework, that call is not guaranteed to return non null. The map is pretty complex and is initializing a lot of state on and off the render thread.
In your case it's safe to call after onFragmentsResumed() or after the fragment is attached to an activity. You could always use a handler to check again some point later.
getMap() is not null inside onStart() of the dialog fragment, after view created.
Related
I'm little bit confused about below code, where I'm adding a Fragment inside a Fragment, onCreateView() method before adding it's View. From my point of view as I did not yet set the View so when the R.id.rv_container will call to get the FrameLayout for that Child Fragment it will get null pointer exception but that's not happening. It working good.
So what is the reason of this? Why I'm wrong about null pointer exception?
Fragment Class:
public class Chats extends Fragment {
#Override
public View onCreateView(
#NonNull LayoutInflater inflater,
ViewGroup container,
Bundle savedInstanceState
) {
initRvView();
return inflater.inflate(R.layout.fragment_chat,
container, false);
}
private void initRvView() {
final String POST_RV = "chat_recycler";
RecyclerViewFragment recyclerViewFragment = (RecyclerViewFragment)
getChildFragmentManager()
.findFragmentByTag(POST_RV);
if (recyclerViewFragment == null) {
recyclerViewFragment = new RecyclerViewFragment(FROM_MESSAGING);
}
getChildFragmentManager().beginTransaction()
.replace(R.id.rv_container,
recyclerViewFragment,
POST_RV)
.commit();
}
}
Fragment Layout (R.layout.fragment_chat):
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<FrameLayout
android:id="#+id/rv_container"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
If you look at the code initRvView() method is calling before set the View but didn't showing any null pointer exception.
I am developing an app that use fragments. One of my fragments i want to use google map but i am getting errors.
public class Map extends Fragment {
public Map() {
// Required empty public constructor
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
GoogleMap map = ((SupportMapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap();
//Error:(38, 84) error: inconvertible types
//required: SupportMapFragment
//found: Fragment
return inflater.inflate(R.layout.fragment_map, container, false);
}
}
When i trying to cast map fragment i am getting the error in comment. What should i do to solve this? Thanks for everyone.
Edit: the layout ;
<fragment
android:layout_width="match_parent"
android:layout_height="200dp"
android:id="#+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment" />
You can go through this approach.This is my Fragment class which has MapView
public class DashBoardFragment extends Fragment{
//-------------- class variables
private MapView mMapView;
private GoogleMap mGoogleMap;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view= inflater.inflate(R.layout.fragment_dash_board, container, false);
mMapView = (MapView) view.findViewById(R.id.map_dashBoard);
mMapView.onCreate(savedInstanceState);
mMapView.onResume();
try {
MapsInitializer.initialize(getActivity().getApplicationContext());
} catch (Exception e) {
e.printStackTrace();
}
mGoogleMap = mMapView.getMap();
}
}
Below is my xml for the fragment
<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"
tools:context="com.dev.abc">
<com.google.android.gms.maps.MapView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/map_dashBoard"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
</LinearLayout>
Manifest should have the following along with permissions
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="your api key" />
You are casting to a mapFragment AFTER the return statement. Since the program believes the method is complete at that point it never reaches it. Try this:
Inflater v = inflater.inflate(R.layout.fragment_map, container, false);
GoogleMap map = ((SupportMapFragment)v.getFragmentManager().findFragmentById(R.id.map)).getMap();
return v;
Also I don't see you using an intent to start the google map activity.
Latest update of Google for Maps, only MapView is supported for fragments.
<com.google.android.gms.maps.MapView
android:id="#+id/mapView"
android:layout_width="match_parent"
android:layout_height="match_parent" />
I`m developing an application that uses an activity with navigation drawer. I have two fragments in the drawer one of which is a google map.
In the map fragment class I want to initialize the GoogleMap object to do some things to the map, but in the onCreateView after I initialize the view through inflater, my app doesn't find the id in R class to initialize the google map.
I call the fragment from the activity through:
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.add(R.id.mainContent, map, Map.class.getSimpleName());
fragmentTransaction.addToBackStack(Map.class.getSimpleName());
fragmentTransaction.commit();
the container xml:
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/drawerLayout"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<FrameLayout
android:id="#+id/mainContent"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</FrameLayout>
<ListView
android:id="#+id/drawerList"
android:layout_width="200dp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:background="#color/background_color" >
</ListView>
</android.support.v4.widget.DrawerLayout>
layout_fragment_map.xml:
<?xml version="1.0" encoding="utf-8"?>
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/map"
android:name="com.google.android.gms.maps.MapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent" />
The Map fragment class:
public class Map extends Fragment {
private View view;
private MapFragment mapFragment;
private GoogleMap googleMap;
#Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
}
#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.layout_fragment_map, container, false);
} catch (InflateException e) {
/* map is already there, just return view as it is */
}
mapFragment = (MapFragment) getFragmentManager().findFragmentById(R.id.map);
googleMap = mapFragment.getMap();
return view;
}
In the line:
mapFragment = (MapFragment) getFragmentManager().findFragmentById(R.id.map);
the R.id.map is undefined Eclipse gives "could not resolve type".
Something is missing or my whole concept is faulty?
Thank you and happy coding!
I resolved the issue by modifying the line:
mapFragment = (MapFragment) getFragmentManager().findFragmentById(R.id.googleMap);
with
mapFragment = (MapFragment) getChildFragmentManager().findFragmentById(R.id.googleMap);
It is strange because the R.id.googleMap is still undefined but the object gets created correctly.
I have an activity that hosts two fragments. One fragment provides some info to the user in various fields. The other fragment should show a Map.
For the fragment hosting the map I need to be able to add custom logic for displaying markers and several other things that I would like to reuse in other places in the app. What is the best way to create a map without defining the fragment in xml like:
<fragment
class="com.google.android.gms.maps.MapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
Thanks,
Nathan
Edit:
I am now using nested fragments, not sure if that is the best way to handle this? My mapfragment is now:
<?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/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.MapFragment" />
</LinearLayout>
and the Fragments code is:
public class ViewCurrentMapFragment extends Fragment implements View.OnClickListener {
public static final String TAG = "MAP_FRAGMENT";
private GoogleMap map;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_view_current_map, container, false);
return rootView;
}
private void getCurrentMarkers() {
// Getting reference to the SupportMapFragment of activity_main.xml
SupportMapFragment smf = ((SupportMapFragment) getActivity().getSupportFragmentManager().findFragmentById(R.id.map));
map = smf.getMap();
}
#Override
public void onClick(View v) {
}
#Override
public void onResume() {
super.onResume();
getCurrentMarkers();
}
}
The problem I am having now is that smf.getMap() is returning null. Any ideas?
Edit2:
Got it to work by changing:
com.google.android.gms.maps.MapFragment
to
com.google.android.gms.maps.SupportMapFragment
Maybe:
<fragment
class="com.mycompany.MyCustomFragmentExtendingMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
or nest fragments like here: http://code.google.com/p/gmaps-api-issues/issues/detail?id=5064#c1
I'm developing an app which uses fragment tab, one of my fragment uses Google Maps V2 "SupportMapFragment"
public class A extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
{
View view = null;
view = inflater.inflate(R.layout.all_coffee_shops_view, container, false);
map = ((SupportMapFragment) getActivity().getSupportFragmentManager()
.findFragmentById(R.id.map)).getMap();
}
}
my xml:
<RelativeLayout
android:id="#+id/map_container"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<fragment
android:id="#+id/map"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
class="com.google.android.gms.maps.SupportMapFragment"
/>
</RelativeLayout>
I'm calling B Fragment from this A fragment(A->B) and when I come back from B->, A fragment onCreateView throws an exception, "android.view.InflateException: Binary XML file line #132: Error inflating class fragment"
when once map fragment is created and when comes back to this fragment again fragment is onCreateView() is called that's why you are getting force close
Try this once in your fragment containing map
#Override
public void onDestroyView() {
super.onDestroyView();
Fragment f = getFragmentManager().findFragmentById(R.id.map);
if (f != null)
getFragmentManager().beginTransaction().remove(f).commit();
}
please comment me about the result
public void onDestroyView() {
super.onDestroyView();
Log.d(TAG, "onDestroyView");
Fragment f = getActivity()
.getSupportFragmentManager().findFragmentById(R.id.map);
if (f != null) {
getActivity().getSupportFragmentManager()
.beginTransaction().remove(f).commit();
}
}