问题
I am trying to implement Here Maps in Fragment but it does not work. I got lots of crashes
Crash Logs:
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1496)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1386)
Suppressed: java.lang.Throwable: HERE SDK Version: 3.7.0.118
at com.nokia.maps.MapsEngine$l.uncaughtException(MapsEngine.java:378)
at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:1068)
at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:1063)
Suppressed: java.lang.Throwable: HERE SDK Version: 3.7.0.118
at com.nokia.maps.MapsEngine$l.uncaughtException(MapsEngine.java:378)
at com.nokia.maps.MapsEngine$l.uncaughtException(MapsEngine.java:379)
at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:1068)
at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:1063)
Caused by: com.here.android.mpa.common.UnintializedMapEngineException: Cannot create HERE SDK object before MapEngine is initialized. See MapEngine.init()
at com.nokia.maps.BaseNativeObject.u(BaseNativeObject.java:39)
at com.nokia.maps.BaseNativeObject.<init>(BaseNativeObject.java:26)
at com.nokia.maps.MapImpl.<init>(MapImpl.java:424)
at com.here.android.mpa.mapping.Map.<init>(Map.java:710)
at ie.globetech.transitconnex.activity.bustrips.BusTripFragment.onEngineInitializationCompleted(BusTripFragment.java:179)
at com.here.android.mpa.common.MapEngine.init(MapEngine.java:279)
at ie.globetech.transitconnex.activity.bustrips.BusTripFragment.onCreate(BusTripFragment.java:136)
at android.support.v4.app.Fragment.performCreate(Fragment.java:2331)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1386)
at android.support.v4.app.FragmentTransition.addToFirstInLastOut(FragmentTransition.java:1188)
at android.support.v4.app.FragmentTransition.calculateFragments(FragmentTransition.java:1071)
at android.support.v4.app.FragmentTransition.startTransitions(FragmentTransition.java:115)
at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2380)
at android.support.v4.app.FragmentManagerImpl.removeRedundantOperationsAndExecute(FragmentManager.java:2338)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:2245)
at android.support.v4.app.FragmentManagerImpl.dispatchStateChange(FragmentManager.java:3248)
at android.support.v4.app.FragmentManagerImpl.dispatchActivityCreated(FragmentManager.java:3200)
at android.support.v4.app.FragmentController.dispatchActivityCreated(FragmentController.java:195)
at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:597)
at ie.globetech.transitconnex.activity.bustrips.BusTripMainActivity.onStart(BusTripMainActivity.java:125)
at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1256)
at android.app.Activity.performStart(Activity.java:6965)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2934)
... 9 more
Fragment Layout:
<com.here.android.mpa.mapping.MapView
android:id="@+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentTop="true" />
Fragment class:
public class BusTripFragment extends Fragment{
private Activity mActivity;
private Map map = null;
private MapView mapView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ApplicationContext appContext = new ApplicationContext(mActivity.getApplicationContext());
MapEngine.getInstance().init(appContext, this);
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
try {
mActivity = (Activity) activity;
//mCallbacks = (MyNavigationDrawerCallbacks) activity;
} catch (ClassCastException e) {}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.trip_fragment, container, false);
mapView = (MapView) view.findViewById(R.id.map);
return view;
}
@Override
public void onEngineInitializationCompleted(Error error) {
// retrieve a reference of the map from the map fragment
//map = mapFragment.getMap();
isMapEngineInitialized = true;
if (map == null) {
map = new Map();
}
mapView.setMap(map);
// Set the map center to the Vancouver region (no animation)
map.setCenter(new GeoCoordinate(49.196261, -123.004773, 0.0), Map.Animation.NONE);
// Set the zoom level to the average between min and max
map.setZoomLevel((map.getMaxZoomLevel() + map.getMinZoomLevel()) / 2);
}
}
I am using HERE SDK Version: 3.7.0.118
I want through below therads
- HERE Map/MapView without using MapFragment
Any one has any idea how to deal with Here Maps MapView in Fragment ?
回答1:
My own solution and it worked very well. Removed MapView completely
Just added FrameLayout in layout xml of Fragment
<FrameLayout
android:id="@+id/simpleFrameLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentTop="true" />
Now, in onCreateView(...) created MapFragment dynamically and added in FrameLayout and init
MapFragment mapFragment = new MapFragment();
FragmentManager fm = mActivity.getFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
ft.replace(R.id.simpleFrameLayout, mapFragment).commit();
mapFragment.init(mActivity, new OnEngineInitListener() {
@Override
public void onEngineInitializationCompleted(OnEngineInitListener.Error error) {
if (error == OnEngineInitListener.Error.NONE) {
// retrieve a reference of the map from the map fragment
map = mapFragment.getMap();
} else {
logger.error("ERROR: Cannot initialize Map Fragment: " + error.getStackTrace());
}
}
});
回答2:
According to the stack trace: Caused by: com.here.android.mpa.common.UnintializedMapEngineException: Cannot create HERE SDK object before MapEngine is initialized. See MapEngine.init()
And from your source code: public void onEngineInitializationCompleted(Error error) {
// retrieve a reference of the map from the map fragment
//map = mapFragment.getMap();
isMapEngineInitialized = true;
... }
You are not checking for the error return code within onEngineInitializationCompleted.
The call stack you are seeing implies an error returned from the engine setup. Please print the error and we can find the proper solution.
来源：https://stackoverflow.com/questions/50523613/here-maps-mapview-does-not-work-in-fragment