blocks|key|4168693|text|您可以添加任何方法，例如|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4168694|++public+void+getFragment(Fragment+fragment){

}|code-block|syntax|javascript|4168695|在MainActivty和片段中|4168696|您可以使用以下代码调用此方法..。|4168697|++((MainActivity)getActivity()).getFragment(this);|4168698|我希望它能帮到你.|4168699|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|T|8|@]|9|@]|A|$]]|$1|K|3|L|5|D|7|U|8|@]|9|@]|A|$E|F]]|$1|M|3|N|5|6|7|V|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

You can add any method say

<pre><code> public void getFragment(Fragment fragment){

}
</code></pre>

in the MainActivty and in the fragment

you can call this method by using the following code...

<pre><code> ((MainActivity)getActivity()).getFragment(this);
</code></pre>

I hope it will help you.....

blocks|key|1840216|text|菲伊，v2|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1840217|yourmap.xml|1840218|<FrameLayout+
++++android:layout_width="match_parent"
++++android:layout_height="match_parent"
++++android:padding="2dp"
++++>
++++<com.google.android.gms.maps.MapView
+++++++++android:id="@%2Bid/mapview"
+++++++++android:layout_width="match_parent"
+++++++++android:layout_height="match_parent"
++++/>
</FrameLayout>|code-block|syntax|javascript|1840219|youractivity.class|1840220|@Override+
public+View+onCreateView(LayoutInflater+inflater,+ViewGroup+container,
++++++++Bundle+savedInstanceState)+{
++++Log.i(TAG,+"oncreate");
++++View+rootView+=+inflater.inflate(R.layout.yourmap,+container,+false);

+++++//+Gets+the+MapView+from+the+XML+layout+and+creates+it
++++mapView+=+(MapView)+rootView.findViewById(R.id.mapview);
++++mapView.onCreate(savedInstanceState);
++++setCurrentLocationMarker();

++++return+rootView;
}

public+void+setCurrentLocationMarker(){
++++try+{
++++//+Gets+to+GoogleMap+from+the+MapView+and+does+initialization+stuff
++++++++map+=+mapView.getMap();
++++++++map.getUiSettings().setMyLocationButtonEnabled(false);
++++++++map.setMyLocationEnabled(true);

++++++++//+Needs+to+call+MapsInitializer+before+doing+any+CameraUpdateFactory+calls
++++++++try+{
++++++++++++MapsInitializer.initialize(getActivity());
++++++++}+catch+(Exception+e)+{
++++++++++++Log.e(TAG+,+"Exception:+"%2Be.getMessage());
++++++++++++e.printStackTrace();
++++++++}

++++++++gps+=+new+GPSTracker(getActivity());

++++++++if(gps.canGetLocation())+{

++++++++++++myLatitude+=+gps.getLatitude();
++++++++++++myLongitude+=+gps.getLongitude();

++++++++++++if(myLatitude==0+&&+myLongitude==0){
++++++++++++++++LocationManager+lm+=+(LocationManager)getActivity().getSystemService(Context.LOCATION_SERVICE);+
++++++++++++++++Location+location+=+getLastKnownLocation(lm);
++++++++++++++++Log.i(TAG,+"location+:+"%2Blocation);
++++++++++++++++if(location!=null){
+++++++++++++++++++++myLatitude+=+location.getLatitude();
+++++++++++++++++++++myLongitude+=+location.getLongitude();
++++++++++++++++}
++++++++++++}

++++++++}+else+{
++++++++++++//+Can't+get+location.
++++++++++++//+GPS+or+network+is+not+enabled.
++++++++++++//+Ask+user+to+enable+GPS/network+in+settings.
++++++++++++gps.showSettingsAlert();
++++++++++++Log.i(TAG,+"gps.canGetLocation()+:+"%2Bgps.canGetLocation());
++++++++++++return;
++++++++}

++++++++Log.i(TAG,+"myLatitude++:"%2BmyLatitude%2B",+myLongitude:+"%2BmyLongitude);


++++++++//+Updates+the+location+and+zoom+of+the+MapView
++++++++if(myLatitude>0+&&+myLongitude>0){
++++++++++++CameraUpdate+cameraUpdate+=+CameraUpdateFactory.newLatLngZoom(new+LatLng(myLatitude,+myLongitude),+10);
++++++++++++map.animateCamera(cameraUpdate);

++++++++++++MarkerInfo+markerinfo+=+new+MarkerInfo("",+"Current+Location",+myLatitude,+myLongitude,+true);
++++++++++++addMarker(markerinfo);
++++++++}


++++++++map.setOnMarkerClickListener(onClickListener);
++++++++map.setOnInfoWindowClickListener(onInfoWindowClickListener);++++++++++++
++++++++marker.showInfoWindow();

++++}+catch+(Exception+e)+{
+++++++Log.e(TAG,+"Exception+:+"%2Be.getMessage());
++++}
}|1840221|entityMap|0|LINK|mutability|MUTABLE|url|https://developers.google.com/maps/documentation/android/start#getting_the_google_maps_android_api_v2^0|3|2|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]]|C|$]]|$1|D|3|E|5|6|7|10|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|11|8|@]|9|@]|C|$I|J]]|$1|K|3|L|5|6|7|12|8|@]|9|@]|C|$]]|$1|M|3|N|5|H|7|13|8|@]|9|@]|C|$I|J]]|$1|O|3|-4|5|6|7|14|8|@]|9|@]|C|$]]]|P|$Q|$5|R|S|T|C|$U|V]]]]

fyi, <a href="https://developers.google.com/maps/documentation/android/start#getting_the_google_maps_android_api_v2" rel="nofollow">https://developers.google.com/maps/documentation/android/start#getting_the_google_maps_android_api_v2</a>

yourmap.xml

<pre><code>&lt;FrameLayout 
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:padding="2dp"
 &gt;
 &lt;com.google.android.gms.maps.MapView
 android:id="@+id/mapview"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 /&gt;
&lt;/FrameLayout&gt;
</code></pre>

youractivity.class

<pre><code>@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container,
 Bundle savedInstanceState) {
 Log.i(TAG, "oncreate");
 View rootView = inflater.inflate(R.layout.yourmap, container, false);

 // Gets the MapView from the XML layout and creates it
 mapView = (MapView) rootView.findViewById(R.id.mapview);
 mapView.onCreate(savedInstanceState);
 setCurrentLocationMarker();

 return rootView;
}

public void setCurrentLocationMarker(){
 try {
 // Gets to GoogleMap from the MapView and does initialization stuff
 map = mapView.getMap();
 map.getUiSettings().setMyLocationButtonEnabled(false);
 map.setMyLocationEnabled(true);

 // Needs to call MapsInitializer before doing any CameraUpdateFactory calls
 try {
 MapsInitializer.initialize(getActivity());
 } catch (Exception e) {
 Log.e(TAG , "Exception: "+e.getMessage());
 e.printStackTrace();
 }

 gps = new GPSTracker(getActivity());

 if(gps.canGetLocation()) {

 myLatitude = gps.getLatitude();
 myLongitude = gps.getLongitude();

 if(myLatitude==0 &amp;&amp; myLongitude==0){
 LocationManager lm = (LocationManager)getActivity().getSystemService(Context.LOCATION_SERVICE); 
 Location location = getLastKnownLocation(lm);
 Log.i(TAG, "location : "+location);
 if(location!=null){
 myLatitude = location.getLatitude();
 myLongitude = location.getLongitude();
 }
 }

 } else {
 // Can't get location.
 // GPS or network is not enabled.
 // Ask user to enable GPS/network in settings.
 gps.showSettingsAlert();
 Log.i(TAG, "gps.canGetLocation() : "+gps.canGetLocation());
 return;
 }

 Log.i(TAG, "myLatitude :"+myLatitude+", myLongitude: "+myLongitude);


 // Updates the location and zoom of the MapView
 if(myLatitude&gt;0 &amp;&amp; myLongitude&gt;0){
 CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(new LatLng(myLatitude, myLongitude), 10);
 map.animateCamera(cameraUpdate);

 MarkerInfo markerinfo = new MarkerInfo("", "Current Location", myLatitude, myLongitude, true);
 addMarker(markerinfo);
 }


 map.setOnMarkerClickListener(onClickListener);
 map.setOnInfoWindowClickListener(onInfoWindowClickListener); 
 marker.showInfoWindow();

 } catch (Exception e) {
 Log.e(TAG, "Exception : "+e.getMessage());
 }
}
</code></pre>

blocks|key|1840223|text|mapView+=+(MapFragment)+((Activity)mContext).getFragmentManager().findFragmentById(R.id.map_view);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1840224|这个对我有用|unstyled|1840225|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>mapView = (MapFragment) ((Activity)mContext).getFragmentManager().findFragmentById(R.id.map_view);
</code></pre>

This works for me

I have main activity and one fragment. In that fragment, I have used Google Map. I want to know, how to pass instance of map fragment to main activity with java. Because I want to manipulate that map into main activity. 

I have this class in main activity 

<pre><code>public static class HomeFragment extends Fragment {

 private static View view;

 public HomeFragment() {
 }

 @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_home, container, false);
 }
 catch(InflateException e){
 // map is already there, just return view as it is
 }
 return view;
 }

}
</code></pre>

fragment_home.xml

<pre><code>&lt;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:padding="0dp"
tools:context="com.gaurav.googlemap.HomeMap" &gt;

&lt;fragment
 android:id="@+id/map"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 class="com.google.android.gms.maps.SupportMapFragment" &gt;
&lt;/fragment&gt;

&lt;/RelativeLayout&gt;
</code></pre>

I want to instantiate map below this line in main activity,

<pre><code>view = inflater.inflate(R.layout.fragment_home, container, false);
</code></pre>

Thanks.

Instantiate Google Map Fragment in another activity

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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