在MapFragment和ListFragment之间切换

时间:2014-04-09 12:26:33

标签: android google-maps android-fragments mapfragment android-nested-fragment

我正在创建一个应用,我希望在CustomMapFragmentListFragment之间切换。如果我启动应用并致电replaceFragment

private void replaceFragment(final Fragment fragment) {
    final FragmentManager fragmentManager = mActivity.getFragmentManager();
    fragmentManager.beginTransaction()
            .replace(R.id.main_content_frame, fragment)
            .commit();
}

replaceFragment(new CustomMapFragment()) Map看起来应该是这样的。

CustomMapFragment是一个片段,我用FrameLayout替换MapFragment,将其与代码分开。

如果我再次点击按钮点击替换方法,使用不同的Fragment(例如ListFragment),FrameLayout将替换为此,一切都很好。

如果我现在尝试使用CustomMapFragment再次替换它,那么完全相同的调用就像开头一样,Map已加载,但每Marker个错误,每个设置I都会丢失已完成CustomMapFragment

CustomMapFragment

public class CustomMapFragment extends BaseFragment {

    private static final String LOG_TAG = PosMapFragment.class.getSimpleName();
    private MapFragment mMapFragment;
    private GoogleMap   mMap;
    private ImageLoader mImageLoader;

    private Context     mContext;

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

        mContext = getActivity();

        final RequestQueue reqQueue = Volley.newRequestQueue(mContext);
        mImageLoader = new ImageLoader(reqQueue, new BitmapLruCache(mContext));
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        return inflater.inflate(R.layout.maps_fragment, container, false);
    }

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

        mMapFragment = MapFragment.newInstance();
        replaceFragment(mMapFragment);
    }

    private void postMapInitialisation() {
        new View(getActivity()).post(new Runnable() {
            @Override
            public void run() {
                addTestMarker(0, 0, "http://www.jimis-cyberstore.com/store/media/gp_batman_tshirts.jpg");
                addTestMarker(10, 10, "http://img.netzwelt.de/software/icons/2012/8842/android-sdk.png");
                addTestMarker(50, 50, "http://fs02.androidpit.info/ali/x84/4053084-1374511678988-80x80.png");
                addTestMarker(5, 0, "http://im.wk.io/images/77e3e40/kitkat-chromium-ubernimmt-in-android.jpeg");
                addTestMarker(0, 10, "http://www.mchme.de/cms/kategorien/18_Software/dateien/fb_logo_80.jpg");
                addTestMarker(15, 5, "http://navigator.ptvgroup.com/uploads/pics/PTV_Navigator_Android_Windows2_80x80px_01.png");
            }
        });
    }

    @Override
    public void onResume() {
        super.onResume();
        setUpMapIfNeeded();
        postMapInitialisation();
        EventBusProvider.getInstance().register(this);
    }

    private void replaceFragment(final Fragment fragment) {
        final FragmentManager fragmentManager = getFragmentManager();
        fragmentManager.beginTransaction()
                .replace(R.id.maps, fragment)
                .commit();
    }

    private void setUpMapIfNeeded() {
        if (mMap == null) {
            mMap = mMapFragment.getMap();
            if (mMap != null) {
                mMap.setMyLocationEnabled(true);
                mMap.setInfoWindowAdapter(this);
                mMap.setOnInfoWindowClickListener(this);
            }
        }
    }

    private void addTestMarker(final double lat, final double lng, String url){
        if(mMap != null){
            final NetworkImageMarker networkImageMarker = new NetworkImageMarker(mContext, url);
            final Marker marker = mMap.addMarker(networkImageMarker.getMarkerOptions(lat, lng, mImageLoader));
            networkImageMarker.setMarker(marker);
            networkImageMarker.setReloadListener(new OnReloadListener() {
                @Override
                public void reAddNetworkImageMarker(Bitmap bitmap) {
                    mMap.addMarker(networkImageMarker.getMarkerOptions(lat, lng, bitmap));
                }
            });
        }
    }

    @Subscribe
    public void onLocationChanged(final LocationChangedEvent event) {
        centerMap(event.mLocation);
    }

    private void centerMap(Location location){
        double latitude = location.getLatitude();
        double longitude = location.getLongitude();
        LatLng latLng = new LatLng(latitude, longitude);
        centerMapAtLocation(latLng);
    }

    private void centerMapAtLocation(LatLng location) {
        mMap.moveCamera(CameraUpdateFactory.newLatLng(location));
        mMap.animateCamera(CameraUpdateFactory.zoomTo(14));
    }
}

主要布局只是FrameLayout,可以替换为不同的Fragment。我还尝试加载Fragment同时加载CustomMapFragmentListFragment的{​​{1}}个FrameLayout,因此它们堆叠< / strong>相互之间,但最终会出现相同的行为。

MapFragment(而不是SupportMapFragment)似乎有问题。

  • 在开头加载MapFragment = MapFragment看起来很完美
  • MapFragment - &gt; ListFragment - &gt; MapFragment = MapFragment是一张空地图
  • ListFragment - &gt; MapFragment = MapFragment是一张空地图
  • MapFragment - &gt; MapFragment = MapFragment是一张空地图

1 个答案:

答案 0 :(得分:4)

因为您正在尝试替换另一个片段中的 片段,所以您应该在替换方法中使用getChildFragmentManager()而不是getFragmentManager()。

private void replaceFragment(final Fragment fragment) {
    final FragmentManager fragmentManager = getChildFragmentManager();
    fragmentManager.beginTransaction()
            .replace(R.id.maps, fragment)
            .commit();
}

不幸的是,只有api lvl&gt; = 17支持getChildFragmentManager(),所以你可能不得不使用android-support-v4库。