在底部导航抽屉中加载带有标记列表的地图片段

Question

在我的应用程序中，我使用底部导航视图。在第三个片段中必须映射。我不知道如何在这个片段中发送数据。

ActivityBotom.class中的方法

@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
Fragment fragment = null;
switch (item.getItemId()) {
case R.id.nav_home:
fragment = new FragmentMarker();
break;
case R.id.nav_bookmark:
fragment = new FragmentBookmark();
break;
case R.id.nav_blog:
fragment = new FragmentMap();
break;
}
getSupportFragmentManager().beginTransaction().replace(R.id.frame_container, fragment).commit();
return true;
}

这是我的FragmentMap.class

public class FragmentMap extends Fragment  {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_map, container, false);
mMapView = getArguments().getParcelable(EXTRA_MARKER_LIST);
mMapView =  rootView.findViewById(R.id.mapView);
mMapView.onCreate(savedInstanceState);
mMapView.onResume(); 
try {
MapsInitializer.initialize(getActivity().getApplicationContext());
} catch (Exception e) {
e.printStackTrace();
}
mMapView.getMapAsync(new OnMapReadyCallback() {
@RequiresApi(api = Build.VERSION_CODES.M)
@Override
public void onMapReady(GoogleMap mMap) {
googleMap = mMap;
...
Log.d("debug", "problem"); 
}
List<Marker> markerList = getActivity().getIntent().getParcelableArrayListExtra(EXTRA_MARKER_LIST);
for (int i = 0; i < markerList.size(); i++) {
Marker marker = markerList.get(i);
Location location = marker.getLocation();
clusterManager.setItems(markerList);
}
}
});

我不断地犯这个错误java.lang.NullPointerException: Attempt to invoke virtual method 'android.os.Parcelable android.os.Bundle.getParcelable(java.lang.String)' on a null object reference

我想如果地图是Bundle的话。但是我不知道如何实现它。我希望有人能帮助我。感谢

Answer 1

您可以使用参数发送数据

Bundle bundle = new Bundle();
bundle.putSerializable(EXTRA_MARKER_LIST, ________);
fragment = new FragmentMap();
fragment.setArguments(bundle);

这将修复问题