android - 如何在 fragment 中使用 AutocompleteSupportFragment

Question

我正在使用 places api 和依赖项

  implementation 'com.google.android.libraries.places:places:1.0.0'

我要添加一个 fragment 中的 AutocompleteSupportFragment。 请帮我把代码放在 fragment 中的什么地方。这些方法我都试过了

1. onCreate()
2. onCreateView()
3. onViewCreated()
4. onActivityCreated()

但它给出空对象引用错误。我已经在一项 Activity 中尝试过，效果很好。

公开课 MyActivity 扩展 Fragment 实现 OnMapReadyCallback{

    AutocompleteSupportFragment autocompleteSupportFragment;


    public ConsumerBookingMapFragment(){ }

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    mView = inflater.inflate(R.layout.fragment_consumer_booking_map,container,false);
    return mView;

}

    @Override
    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        if (savedInstanceState != null) {
            mLastKnownLocation = savedInstanceState.getParcelable(KEY_LOCATION);
            mCameraPosition = savedInstanceState.getParcelable(KEY_CAMERA_POSITION);
        }
        mFusedLocationProviderClient = LocationServices.getFusedLocationProviderClient(getActivity());
        mMapView = mView.findViewById(R.id.map);
        if(mMapView != null){
            mMapView.onCreate(null);
            mMapView.onResume();
            mMapView.getMapAsync(this);
        }
    }

    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
    }

Answer 1

这是一个可行的解决方案。

  AutocompleteSupportFragment autocompleteFragment = (AutocompleteSupportFragment)
                    getChildFragmentManager().findFragmentById(R.id.autocomplete_fragment);

使用 getChildFragmentManager() 而不是 getSupportFragmentManager()/getFragmentManager()