片段内的MapView [英] MapView inside fragment
本文介绍了片段内的MapView的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有一个带有片段的TabLayout，一个片段包含一个MapView，但是每次带有MapView的片段从后台返回时，在片段试图创建MapView时都会抛出错误；
I have a TabLayout with fragments, and one fragment contains a MapView, but every time the fragment with the MapView comes back from background, throws an error at the moment the fragment tries to create the MapView;
我的片段如下:
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();
}
}
并在此行崩溃 mapView.onCreate(savedInstanceState);
这是错误:
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看起来像这样:
My xml looks like this:
<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>
推荐答案
该错误表明，您需要build.gradle中的recycler view依赖项或删除recyclerview.Android试图扩大您的视图，但您没有依赖性.
The error says, you need the recycler view dependency in your build.gradle or remove the recyclerview. Android is trying to inflate your view, but you dont have the dependency.
要使用recyclerview，您需要额外的依赖关系是支持库的一部分.
To use a recyclerview you need an extra dependency is part of support libraries.
compile 'com.android.support:recyclerview-v7:25.0.0'
更多信息:
https://developer.android.com/reference/android/support/v7/widget/RecyclerView.html
https://developer.android.com/training/material/lists-cards.html
这篇关于片段内的MapView的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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