我试图动态创建一个SupportMapFragment并将其放在一个FrameLayout容器中.
我的问题是mMapFragment.getMap()返回null …
有人可以帮忙吗
CenterMapFragment.java
public class CenterMapFragment extends Fragment { private SupportMapFragment mMapFragment; @Override public View onCreateView(LayoutInflater inflater,ViewGroup container,Bundle savedInstanceState) { return inflater.inflate(R.layout.center_map_fragment,container,false); } @Override public void onActivityCreated (Bundle savedInstanceState){ super.onActivityCreated(savedInstanceState); if (GooglePlayServicesUtil.isGooglePlayServicesAvailable(getActivity()) == ConnectionResult.SUCCESS) { setUpMapIfNeeded(); } } private void setUpMapIfNeeded() { if (mMapFragment == null) { mMapFragment = SupportMapFragment.newInstance(); FragmentTransaction fragmentTransaction = getChildFragmentManager().beginTransaction(); fragmentTransaction.replace(R.id.map,mMapFragment); fragmentTransaction.commit(); setUpMap(); } } private void setUpMap() { GoogleMap map = mMapFragment.getMap(); // map is null! } @Override public void onResume() { super.onResume(); setUpMapIfNeeded(); } }
center_map_fragment.xml
<?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" > <FrameLayout android:id="@+id/map" android:layout_width="match_parent" android:layout_height="match_parent" > </FrameLayout> <Button android:id="@+id/btn_loc" android:layout_width="60dp" android:layout_height="50dp" android:layout_alignParentBottom="true" android:layout_alignParentRight="true" android:background="@drawable/locbtn" /> </RelativeLayout>
解决方法
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