1
我使用Google SlidingTabLayout和SlidingTabStrip.with在一個片段。 片段主機2其他片段，其中一個具有地圖視圖，另一個具有列表視圖。 如果我第一次從導航抽屜中打開此片段（打開應用程序），它會正確顯示帶有2個選項卡的片段。滑動標籤不能正確加載第二次
但是，當我嘗試通過導航抽屜或通過後退按鈕返回，片段不加載任何東西，只有像slidinglayout灰色背景沒有正確加載。
任何人都可以指出我做錯了什麼？
StoreTabHostFragment.java
public class StoreTabHostFragment extends Fragment {
private ViewPager viewPager;
private StoresPagerAdapter mAdapter;
private SlidingTabLayout tabLayout;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRetainInstance(true);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_stores, container, false);
viewPager = (ViewPager) rootView.findViewById(R.id.pager);
mAdapter = new StoresPagerAdapter(getActivity().getSupportFragmentManager(), getActivity());
viewPager.setAdapter(mAdapter);
tabLayout = (SlidingTabLayout) rootView.findViewById(R.id.sliding_tabs);
tabLayout.setDistributeEvenly(true);
tabLayout.setViewPager(viewPager);
return rootView;
}
}
StoreMapFragment.java（省略了一些功能）
public class StoreMapFragment extends Fragment implements LocationListener,OnMapReadyCallback {
private GoogleMap mMap;
private MapView mMapView;
private Bundle mBundle = new Bundle();
private Double currentLng = -99.274643;
private Double currentLat = 19.360460;
private LocationManager locationManager;
private String provider;
private CameraPosition cameraPosition;
private SharedPreferences sharedPreferences;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mBundle = savedInstanceState;
sharedPreferences = getActivity().getSharedPreferences(Constants.SHARED_PREFERENCES_NAME, Context.MODE_PRIVATE);
}
@Override
public View onCreateView(LayoutInflater inflater, final ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_store_map, container, false);
try{
MapsInitializer.initialize(getActivity());
}catch(Exception e){
e.printStackTrace();
}
mMapView = (MapView) rootView.findViewById(R.id.map);
mMapView.onCreate(mBundle);
mMapView.getMapAsync(this);
//setUpMapIfNeeded(rootView);
return rootView;
}
private void addMarker(GoogleMap map, MFinderStore store){
map.addMarker(new MarkerOptions().position(new LatLng(Double.valueOf(store.lat), Double.valueOf(store.lng)))
.title(store.storeName)
.snippet(store.storeAddress)
.icon(BitmapDescriptorFactory.fromResource(R.drawable.map_marker)));
}
@Override
public void onMapReady(GoogleMap googleMap) {
googleMap.addMarker(new MarkerOptions().position(new LatLng(currentLat, currentLng)).title(getString(R.string.your_position)));
cameraPosition = new CameraPosition.Builder().target(new LatLng(currentLat, currentLng)).zoom(14).build();
googleMap.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
getStoreList(googleMap);
}
@Override
public void onResume() {
super.onResume();
mMapView.onResume();
}
@Override
public void onPause() {
super.onPause();
mMapView.onPause();
//cameraPosition = mMap.getCameraPosition();
}
@Override
public void onDestroy() {
mMapView.onDestroy();
super.onDestroy();
}
}
StorePagerAdapter.java
public class StoresPagerAdapter extends FragmentPagerAdapter {
private static int FRAGMENT_NUMBER = 2;
private Context context;
private String tabTitles[] = new String[] {"Mapa", "Sucursales"};
public StoresPagerAdapter(FragmentManager fm, Context context){
super(fm);
this.context = context;
}
@Override
public Fragment getItem(int index){
switch(index){
case 0:
return new StoreMapFragment();
case 1:
return new StoreListFragment();
}
return null;
}
@Override
public int getCount() {
// get item count - equal to number of tabs
return FRAGMENT_NUMBER;
}
@Override
public CharSequence getPageTitle(int position){
return tabTitles[position];
}
}