Android - android.view.InflateException:二进制XML文件行#8:错误膨胀类片段

Question

我正在开发一个使用NavigationDrawerie 的应用程序DrawerLayout并导航到不同的Fragments.当我调用Map_Fragment_Page应用程序崩溃时,但不是第一次.这是第一次Map正确显示,但在此之后,当我导航不同的片段并再次出现时,Map_Fragment_Page它会崩溃而产生错误android.view.InflateException: Binary XML file line #8: Error inflating class fragment

我尝试了很多不同的解决方案,我也搜索过Google但仍未获得所需的解决方案.问题尚未解决.

howtoreach.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <fragment
        android:id="@+id/howtoreach_map"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        class="com.google.android.gms.maps.SupportMapFragment"/>

</RelativeLayout>

HowToReach.java

    package com.demo.map.howtoreach;

import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import android.support.v4.app.Fragment;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.CameraPosition;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;
import com.google.android.gms.maps.model.Polyline;
import com.google.android.gms.maps.model.PolylineOptions;
import com.demo.map.R;

import android.app.ProgressDialog;
import android.content.Context;
import android.graphics.Color;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.Handler;

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Toast;

public class HowToReach extends Fragment
{
    public static final String TAG = "fragment_5";
    ProgressDialog dialog;

    GoogleMap googleMap;
    Marker marker;

    LocationManager locationManager;
    Location location;
    Criteria criteria;               
    String provider;

    double latitude, longitude;

    public HowToReach(){}

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

        final View v = inflater.inflate(R.layout.howtoreach, container, false);

        dialog = ProgressDialog.show(getActivity(),"","Loading",true,false);            

        int secondsDelayed = 4;
        new Handler().postDelayed(new Runnable()
                {
                    public void run()
        {               
            dialog.dismiss();
        }
        }, secondsDelayed * 1000);      

        try
        {
            // Loading map                  

            if (googleMap == null)
            {
                googleMap = ((SupportMapFragment) getFragmentManager().findFragmentById(R.id.howtoreach_map)).getMap();

                googleMap.setMyLocationEnabled(true);

                locationManager = (LocationManager) getActivity().getSystemService(Context.LOCATION_SERVICE);              
                criteria = new Criteria();               
                provider = locationManager.getBestProvider(criteria, true); 
                location = locationManager.getLastKnownLocation(provider);

                latitude = location.getLatitude();
                longitude = location.getLongitude();

                // create marker
                marker = googleMap.addMarker(new MarkerOptions().position(
                            new LatLng(latitude, longitude)).title("You are Here"));                  
                marker.setIcon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED));
                marker.showInfoWindow(); 

                CameraPosition cameraPosition = new CameraPosition.Builder().target(
                        new LatLng(latitude, longitude)).zoom(15).build();

                googleMap.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));                         

                Polyline line = googleMap.addPolyline(new PolylineOptions()
                        .add(new LatLng(latitude, longitude), new LatLng(18.520897,73.772396))
                        .width(2).color(Color.RED).geodesic(true));

                marker = googleMap.addMarker(new MarkerOptions().position(
                            new LatLng(18.520897, 73.772396)).title("DSK Ranwara Road"));             
                marker.setIcon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED));

                // check if map is created successfully or not
                if (googleMap == null)
                {
                    Toast.makeText(getActivity(),"Sorry! unable to create maps", Toast.LENGTH_SHORT).show();
                }
            }

        }
        catch (Exception e)
        {
            e.printStackTrace();
        }

        return v;

    }
}

Answer 1

Yes.. I want Map inside a Fragment.

你应该用一个 MapView

http://developer.android.com/reference/com/google/android/gms/maps/MapView.html

public class HowToReach  extends Fragment {
    MapView mapView;
    GoogleMap map;
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.fragment2, container, false);
        // Gets the MapView from the XML layout and creates it

        try {
            MapsInitializer.initialize(getActivity());
        } catch (GooglePlayServicesNotAvailableException e) {
            Log.e("Address Map", "Could not initialize google play", e);
        }

        switch (GooglePlayServicesUtil.isGooglePlayServicesAvailable(getActivity()) )
        {
            case ConnectionResult.SUCCESS:
                Toast.makeText(getActivity(), "SUCCESS", Toast.LENGTH_SHORT).show();
                mapView = (MapView) v.findViewById(R.id.map);
                mapView.onCreate(savedInstanceState);
                // Gets to GoogleMap from the MapView and does initialization stuff
                if(mapView!=null)
                {
                    map = mapView.getMap();
                    map.getUiSettings().setMyLocationButtonEnabled(false);
                    map.setMyLocationEnabled(true);
                    CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(new LatLng(43.1, -87.9), 10);
                    map.animateCamera(cameraUpdate);
                }
                break;
            case ConnectionResult.SERVICE_MISSING: 
                Toast.makeText(getActivity(), "SERVICE MISSING", Toast.LENGTH_SHORT).show();
                break;
            case ConnectionResult.SERVICE_VERSION_UPDATE_REQUIRED: 
                Toast.makeText(getActivity(), "UPDATE REQUIRED", Toast.LENGTH_SHORT).show();
                break;
            default: Toast.makeText(getActivity(), GooglePlayServicesUtil.isGooglePlayServicesAvailable(getActivity()), Toast.LENGTH_SHORT).show();
        }




        // Updates the location and zoom of the MapView

        return v;
    }

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

fragment2.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

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

</RelativeLayout>

更新:

https://developers.google.com/android/reference/com/google/android/gms/maps/MapView#public-constructors

getMap()已弃用.请getMapAsync(OnMapReadyCallback)改用.回调方法为您提供了一个保证非空并准备好使用的GoogleMap实例.

Answer 2

因此,如果它在第二次打开片段后崩溃.你需要的就是OnDestroy

@Override
public void onDestroy() {
    super.onDestroy();
    getFragmentManager().beginTransaction().remove(mapfragmentnamehere).commit();
}

如果您正在使用支持片段,请进行所需的更改

Answer 3

我使用xml-tag添加的片段的经验

<fragment>...</fragment>.

这些片段通常是嵌套的,并且在父片段被破坏时不会破坏.一旦你试图再次给它们充气,你会得到一个例外,它基本上会抱怨这个片段已经膨胀了.因此,一旦父片段被破坏,我会手动销毁我的嵌套片段.只需使用以下剪切并根据您的需要进行调整.此代码驻留在父片段中,该片段具有嵌套片段作为xml-tag.

@Override
public void onDestroy() {
    super.onDestroy();
    final FragmentManager fragManager = this.getFragmentManager();
    final Fragment fragment = fragManager.findFragmentById(/*id of fragment*/);
    if(fragment!=null){
        fragManager.beginTransaction().remove(fragment).commit();
    }
}

使用动态创建的片段,根本没有问题.动态意味着:您没有使用fragment-xml-tag

希望这可以帮助!好编程!