MapView里面的片段

我有一个带有片段的TabLayout，一个片段包含一个MapView，但每次带有MapView的片段都从后台返回时，在片段尝试创建MapView时抛出一个错误;MapView里面的片段

我的片段是这样的：

public class DinerFoodMapFragment extends Fragment { 

    private MapView mapView; 
    private GoogleMap map; 

    public DinerFoodMapFragment() { 
    } 

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

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
          Bundle savedInstanceState) { 

     super.onCreateView(inflater, container, savedInstanceState); 

     View view = inflater.inflate(R.layout.fragment_diner_food_map, container, false); 
     mapView = (MapView) view.findViewById(R.id.map_view); 
     mapView.onCreate(savedInstanceState); 
     return view; 
    } 

    @Override 
    public void onSaveInstanceState(Bundle outState) { 
     super.onSaveInstanceState(outState); 
     mapView.onSaveInstanceState(outState); 
    } 

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

     try { 
      MapsInitializer.initialize(getActivity().getApplicationContext()); 
     } catch (Exception e) { 
      e.printStackTrace(); 
     } 


     mapView.getMapAsync(new OnMapReadyCallback() { 
      @Override 
      public void onMapReady(GoogleMap mMap) { 
       map = mMap; 
       CameraUpdate center = 
         CameraUpdateFactory.newLatLng(new LatLng(25.6714, 
           -100.309)); 
       CameraUpdate zoom = CameraUpdateFactory.zoomTo(15); 

       map.moveCamera(center); 
       map.animateCamera(zoom); 
      } 
     }); 
    } 

    @Override 
    public void onResume() { 
     super.onResume(); 
     mapView.onResume(); 

    } 

    @Override 
    public void onDestroy() { 
     super.onDestroy(); 
     mapView.onDestroy(); 
    } 

    @Override 
    public void onLowMemory() { 
     super.onLowMemory(); 
     mapView.onLowMemory(); 
    } 

    @Override 
    public void onPause() { 
     super.onPause(); 
     mapView.onPause(); 
    } 
}

在这条线 mapView.onCreate(savedInstanceState);

这

和崩溃的错误：

05-30 14:53:27.725 20916-20916/com.frevo.frevo E/Parcel: Class not found when unmarshalling: android.support.v7.widget.RecyclerView$SavedState 
                 java.lang.ClassNotFoundException: android.support.v7.widget.RecyclerView$SavedState 
                  at java.lang.Class.classForName(Native Method) 
                  at java.lang.Class.forName(Class.java:324) 
                  at android.os.Parcel.readParcelableCreator(Parcel.java:2404) 
                  at android.os.Parcel.readParcelable(Parcel.java:2358) 
                  at android.os.Parcel.readValue(Parcel.java:2264) 
                  at android.os.Parcel.readSparseArrayInternal(Parcel.java:2675) 
                  at android.os.Parcel.readSparseArray(Parcel.java:1967) 
                  at android.os.Parcel.readValue(Parcel.java:2321) 
                  at android.os.Parcel.readArrayMapInternal(Parcel.java:2614) 
                  at android.os.BaseBundle.unparcel(BaseBundle.java:221) 
                  at android.os.Bundle.getBundle(Bundle.java:763) 
                  at com.google.android.gms.maps.internal.ea.a(:com.google.android.gms.DynamiteModulesB:168) 
                  at com.google.maps.api.android.lib6.impl.az.a(:com.google.android.gms.DynamiteModulesB:690) 
                  at com.google.maps.api.android.lib6.impl.da.a(:com.google.android.gms.DynamiteModulesB:81) 
                  at com.google.android.gms.maps.internal.z.onTransact(:com.google.android.gms.DynamiteModulesB:66) 
                  at android.os.Binder.transact(Binder.java:387) 
                  at com.google.android.gms.maps.internal.IMapViewDelegate$zza$zza.onCreate(Unknown Source) 
                  at com.google.android.gms.maps.MapView$zza.onCreate(Unknown Source) 
                  at com.google.android.gms.dynamic.zza$3.zzb(Unknown Source) 
                  at com.google.android.gms.dynamic.zza$1.zza(Unknown Source) 
                  at com.google.android.gms.maps.MapView$zzb.zzIL(Unknown Source) 
                  at com.google.android.gms.maps.MapView$zzb.zza(Unknown Source) 
                  at com.google.android.gms.dynamic.zza.zza(Unknown Source) 
                  at com.google.android.gms.dynamic.zza.onCreate(Unknown Source) 
                  at com.google.android.gms.maps.MapView.onCreate(Unknown Source) 
                  at com.frevo.frevo.diner.fragments.food.DinerFoodMapFragment.onCreateView(DinerFoodMapFragment.java:83) 
                  at android.support.v4.app.Fragment.performCreateView(Fragment.java:2192) 
                  at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1299) 
                  at android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1528) 
                  at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1595) 
                  at android.support.v4.app.BackStackRecord.executeOps(BackStackRecord.java:758) 
                  at android.support.v4.app.FragmentManagerImpl.executeOps(FragmentManager.java:2363) 
                  at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2149) 
                  at android.support.v4.app.FragmentManagerImpl.optimizeAndExecuteOps(FragmentManager.java:2103) 
                  at android.support.v4.app.FragmentManagerImpl.execSingleAction(FragmentManager.java:1984) 
                  at android.support.v4.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:626) 
                  at android.support.v4.app.FragmentStatePagerAdapter.finishUpdate(FragmentStatePagerAdapter.java:166) 
                  at android.support.v4.view.ViewPager.populate(ViewPager.java:1268) 
                  at android.support.v4.view.ViewPager.setCurrentItemInternal(ViewPager.java:668) 
                  at android.support.v4.view.ViewPager.setCurrentItemInternal(ViewPager.java:630) 
                  at android.support.v4.view.ViewPager.setCurrentItem(ViewPager.java:611) 
                  at android.support.design.widget.TabLayout$ViewPagerOnTabSelectedListener.onTabSelected(TabLayout.java:2191) 
                  at android.support.design.widget.TabLayout.dispatchTabSelected(TabLayout.java:1164) 
                  at android.support.design.widget.TabLayout.selectTab(TabLayout.java:1157) 
                  at android.support.design.widget.TabLayout.selectTab(TabLayout.java:1127) 
                  at android.support.design.widget.TabLayout$Tab.select(TabLayout.java:1426) 
                  at android.support.design.widget.TabLayout$TabView.performClick(TabLayout.java:1536) 
                  at android.view.View$PerformClick.run(View.java:21168) 
                  at android.os.Handler.handleCallback(Handler.java:746) 
                  at android.os.Handler.dispatchMessage(Handler.java:95) 
                  at android.os.Looper.loop(Looper.java:148) 
                  at android.app.ActivityThread.main(ActivityThread.java:5443) 
                  at java.lang.reflect.Method.invoke(Native Method)

我的XML看起来是这样的：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    tools:context="com.frevo.frevo.diner.fragments.food.DinerFoodMapFragment"> 

    <com.google.android.gms.maps.MapView 
     android:id="@+id/map_view" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" /> 

    <com.yarolegovich.discretescrollview.DiscreteScrollView 
     android:background="@drawable/shadow_gradient" 
     android:id="@+id/discrete_scroll" 
     android:layout_width="match_parent" 
     android:layout_height="100dp" 
     android:layout_alignParentBottom="true" /> 

</RelativeLayout>

来源

2017-05-30 Carlos Guerrero

请添加XML。该错误说，你需要在你的build.gradle – AndroidRuntimeException

回收视图依赖关系。我有一个回收视图，但我没有做任何事情，如果我删除回收视图它的工作原理。你有什么想法，为什么？ –

错误说，你需要build.gradle中的回收器视图依赖，或者删除recyclerview。 Android正试图夸大你的观点，但你没有依赖。

要使用recyclerview，需要额外的依赖项是支持库的一部分。

compile 'com.android.support:recyclerview-v7:25.0.0'

https://developer.android.com/training/material/lists-cards.html

来源

2017-05-30 20:22:22 AndroidRuntimeException

我已经有我的gradle文件的依赖。 –

我想我需要做这样的事情。 https://stackoverflow.com/questions/36131256/recyclerview-mapview-crashes-when-rotating-device ..我会尽力，我会让你知道。 –

没有工作，所以我不知道 –

MapView里面的片段

回答

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