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我試圖在我的應用程序中實施Google地圖。我使用的是抽屜式導航和打電話給我的片段是這樣的:谷歌地圖在導航抽屜 - 空指針異常,這是正確的片段?
//Main-Class
public void onNavigationDrawerItemSelected(int position) {
Fragment myFramgent = null;
switch (position) {
...
case 2 :
myFramgent = new Fillilaen();
System.out.println("FILLIAEN");
break;
...
}
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.container, myFramgent)
.commit();
}
的Fillialaen類
public class Fillilaen extends SupportMapFragment implements ... {
private GoogleMap mMap;
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
myView = inflater.inflate(R.layout.fillialen2, container, false);
return myView;
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
SupportMapFragment fragment = (SupportMapFragment) this.getChildFragmentManager().findFragmentById(R.id.location_map);
fragment.getMapAsync(this); //ERROR COMES HERE
}
public void onMapReady(GoogleMap googleMap) {
//never enter this..
mMap = googleMap;
Marker hamburg = mMap.addMarker(new MarkerOptions().position(HAMBURG).title("Hamburg"));
}
}
我的XML
<fragment
android:id="@+id/location_map"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.SupportMapFragment" />
我得到一個NullPointerException,我絕對不知道爲什麼。我搜索了很多,發現類似的問題,但沒有任何幫助。
的空指針異常的開始:
致命異常:主 工藝:roth.com.test6,PID:13097 顯示java.lang.NullPointerException:嘗試調用接口方法「無效com.google .maps.api.android.lib6.e.fl.o()」上在com.google.maps.api.android.lib6.eyb(未知來源)一個空對象引用 ....
謝謝!