Использование Google Maps внутри фрагмента в Android

Question

Я пытаюсь загрузить Google Maps внутри фрагмента, и я продолжаю получать ту же ошибку, независимо от того, какое решение я пытаюсь реализовать. Я уже ушел, хотя все подобные (если не одинаковые) вопросы и попытались сделать то, что предложили первые несколько лучших ответов, но, к сожалению, без везения. Так что я действительно был бы признателен, если бы вы помочь мне: Мой MainActivity.java выглядит следующим образом:

package com.nzf.nzf.nzfmap; 

import android.support.v4.app.Fragment; 
import android.os.Bundle; 
import android.support.v4.app.*; 
import android.support.v4.view.ViewPager; 
import android.util.Log; 

import java.util.List; 
import java.util.Vector; 

/** 
* Created by Adil on 21/04/2015. 
*/ 
public class MainActivity extends FragmentActivity { 

    private PagerAdapter mPagerAdapter; 
    public static FragmentManager fragmentManager; 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     Log.d("Position", "I am in MainActivity"); 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
     // initialising the object of the FragmentManager. 
     fragmentManager = getSupportFragmentManager(); 
     initialisePaging(); 
    } 
    private void initialisePaging() { 
     List<Fragment> fragments = new Vector<Fragment>(); 
     fragments.add(new ListFragment()); 
     fragments.add(new MapsFragment()); 
     ViewPager pager = (ViewPager) findViewById(R.id.viewpager); 
     mPagerAdapter = new PagerAdapter(getSupportFragmentManager(),fragments); 
     pager.setAdapter(mPagerAdapter); 
    } 

} 

Есть два фрагмента, которые я добавляю в осколках перечени 1. ListFragment У меня нет никаких проблем с этим фрагментом. 2. MapsFragment моя основная проблема заключается в этом фрагменте. Вот мое MapsFragment.java содержания:

package com.nzf.nzf.nzfmap; 

import android.os.Bundle; 
import android.support.v4.app.Fragment; 
import android.util.Log; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.RelativeLayout; 

import com.google.android.gms.maps.GoogleMap; 
import com.google.android.gms.maps.SupportMapFragment; 
import com.google.android.gms.maps.model.BitmapDescriptorFactory; 
import com.google.android.gms.maps.model.LatLng; 
import com.google.android.gms.maps.model.MarkerOptions; 


public class MapsFragment extends Fragment { 
    static final LatLng MELBOURNE = new LatLng(-37.8254,144.95410); 
    static final LatLng SYDNEY = new LatLng(-33.86916,151.20437); 

    private GoogleMap mMap; // Might be null if Google Play services APK is not available. 

    public MapsFragment() { 
     // Required empty public constructor 
    } 

    @Override 
    public void onResume() { 
     super.onResume(); 
     setUpMapIfNeeded(); 
    } 
    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
          Bundle savedInstanceState) { 
     Log.d("Position", "I am in MapsFragment"); 
     if (container == null) { 
      return null; 
     } 
     // Inflate the layout for this fragment 
     View view = inflater.inflate(R.layout.fragment_map, container, false); 

     setUpMapIfNeeded(); 

     return view; 
    } 
    /** 
    * Sets up the map if it is possible to do so (i.e., the Google Play services APK is correctly 
    * installed) and the map has not already been instantiated.. This will ensure that we only ever 
    * call {@link #setUpMap()} once when {@link #mMap} is not null. 
    * <p/> 
    * If it isn't installed {@link SupportMapFragment} (and 
    * {@link com.google.android.gms.maps.MapView MapView}) will show a prompt for the user to 
    * install/update the Google Play services APK on their device. 
    * <p/> 
    * A user can return to this FragmentActivity after following the prompt and correctly 
    * installing/updating/enabling the Google Play services. Since the FragmentActivity may not 
    * have been completely destroyed during this process (it is likely that it would only be 
    * stopped or paused), {@link #onCreate(Bundle)} may not be called again so we should call this 
    * method in {@link #onResume()} to guarantee that it will be called. 
    */ 
    private void setUpMapIfNeeded() { 
     // Do a null check to confirm that we have not already instantiated the map. 
     if (mMap == null) { 
      // Try to obtain the map from the SupportMapFragment. 
      mMap = ((SupportMapFragment)getFragmentManager().findFragmentById(R.id.map)) 
        .getMap(); 
      // Check if we were successful in obtaining the map. 
      if (mMap != null) { 
       setUpMap(); 
      } 
    } 
} 
    /** 
    * This is where we can add markers or lines, add listeners or move the camera. In this case, we 
    * just add a marker near Africa. 
    * <p/> 
    * This should only be called once and when we are sure that {@link #mMap} is not null. 
    */ 
    private void setUpMap() { 
     mMap.addMarker(new MarkerOptions().position(MELBOURNE).title("mMarker")); 
     MarkerOptions mo = new MarkerOptions(); 
     mo.draggable(true); 
     mo.position(SYDNEY).title("sMarker"); 
     mo.icon(BitmapDescriptorFactory.fromResource(R.drawable.ic_launcher)); 
     mMap.addMarker(mo); 

     Log.d(Constants.LOG, "on setUpMap"); 

    } 
    public interface Constants { 
     String LOG = "com.nzf.nzf.nzfmap"; 
    } 

} 

Файл Xml (fragment_map.xml) упомянутый фрагмент следующим образом:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:tools="http://schemas.android.com/tools" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
tools:context="com.nzf.nzf.nzfmap.MapsFragment"> 

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

</RelativeLayout> 

Ошибка я получаю в LogCat приводится ниже:

07-04 21:32:37.455 7623-7623/com.example.nzf.nzfmap D/Position﹕ I am in MainActivity 
07-04 21:32:37.530 7623-7623/com.example.nzf.nzfmap D/dalvikvm﹕ GC_FOR_ALLOC freed 103K, 17% free 10022K/12000K, paused 23ms, total 23ms 
07-04 21:32:37.535 7623-7623/com.example.nzf.nzfmap I/dalvikvm-heap﹕ Grow heap (frag case) to 12.689MB for 1127536-byte allocation 
07-04 21:32:37.565 7623-7632/com.example.nzf.nzfmap D/dalvikvm﹕ GC_FOR_ALLOC freed <1K, 16% free 11123K/13104K, paused 24ms, total 24ms 
07-04 21:32:37.615 7623-7623/com.example.nzf.nzfmap D/Position﹕ I am in ListFragment 
07-04 21:32:37.615 7623-7623/com.example.nzf.nzfmap D/Position﹕ I am in MapsFragment 
07-04 21:32:37.630 7623-7623/com.example.nzf.nzfmap I/x﹕ Making Creator dynamically 
07-04 21:32:37.650 7623-7623/com.example.nzf.nzfmap I/Google Maps Android API﹕ Google Play services client version: 6587000 
07-04 21:32:37.655 7623-7623/com.example.nzf.nzfmap I/Google Maps Android API﹕ Google Play services package version: 7574036 
07-04 21:32:37.675 7623-7623/com.example.nzf.nzfmap I/dalvikvm﹕ Could not find method android.app.AppOpsManager.checkPackage, referenced from method com.google.android.gms.common.ij.a 
07-04 21:32:37.675 7623-7623/com.example.nzf.nzfmap W/dalvikvm﹕ VFY: unable to resolve virtual method 111: Landroid/app/AppOpsManager;.checkPackage (ILjava/lang/String;)V 
07-04 21:32:37.675 7623-7623/com.example.nzf.nzfmap D/dalvikvm﹕ VFY: replacing opcode 0x6e at 0x0012 
07-04 21:32:37.675 7623-7623/com.example.nzf.nzfmap I/dalvikvm﹕ Could not find method android.content.pm.PackageManager.getPackageInstaller, referenced from method com.google.android.gms.common.ij.a 
07-04 21:32:37.675 7623-7623/com.example.nzf.nzfmap W/dalvikvm﹕ VFY: unable to resolve virtual method 449: Landroid/content/pm/PackageManager;.getPackageInstaller()Landroid/content/pm/PackageInstaller; 
07-04 21:32:37.680 7623-7623/com.example.nzf.nzfmap D/dalvikvm﹕ VFY: replacing opcode 0x6e at 0x000d 
07-04 21:32:37.685 7623-7623/com.example.nzf.nzfmap I/dalvikvm﹕ Could not find method android.app.Notification$Builder.setLocalOnly, referenced from method com.google.android.gms.common.ij.b 
07-04 21:32:37.685 7623-7623/com.example.nzf.nzfmap W/dalvikvm﹕ VFY: unable to resolve virtual method 154: Landroid/app/Notification$Builder;.setLocalOnly (Z)Landroid/app/Notification$Builder; 
07-04 21:32:37.685 7623-7623/com.example.nzf.nzfmap D/dalvikvm﹕ VFY: replacing opcode 0x6e at 0x0201 
07-04 21:32:37.895 7623-7623/com.example.nzf.nzfmap D/AbsListView﹕ Get MotionRecognitionManager 
07-04 21:32:37.900 7623-7623/com.example.nzf.nzfmap D/AbsListView﹕ onVisibilityChanged() is called, visibility : 8 
07-04 21:32:37.900 7623-7623/com.example.nzf.nzfmap D/AbsListView﹕ unregisterIRListener() is called 
07-04 21:32:37.905 7623-7623/com.example.nzf.nzfmap D/AbsListView﹕ onVisibilityChanged() is called, visibility : 8 
07-04 21:32:37.905 7623-7623/com.example.nzf.nzfmap D/AbsListView﹕ unregisterIRListener() is called 
07-04 21:32:37.975 7623-7668/com.example.nzf.nzfmap D/dalvikvm﹕ GC_FOR_ALLOC freed 558K, 17% free 12102K/14532K, paused 31ms, total 31ms 
07-04 21:32:38.080 7623-7623/com.example.nzf.nzfmap D/AbsListView﹕ onVisibilityChanged() is called, visibility : 0 
07-04 21:32:38.080 7623-7623/com.example.nzf.nzfmap D/AbsListView﹕ unregisterIRListener() is called 
07-04 21:32:38.110 7623-7623/com.example.nzf.nzfmap D/AndroidRuntime﹕ Shutting down VM 
07-04 21:32:38.110 7623-7623/com.example.nzf.nzfmap W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0x41bae700) 
07-04 21:32:38.115 7623-7623/com.example.nzf.nzfmap E/AndroidRuntime﹕ FATAL EXCEPTION: main 
    java.lang.NullPointerException 
      at com.nzf.nzf.nzfmap.MapsFragment.setUpMapIfNeeded(MapsFragment.java:66) 
      at com.nzf.nzf.nzfmap.MapsFragment.onCreateView(MapsFragment.java:43) 
      at android.support.v4.app.Fragment.performCreateView(Fragment.java:1786) 
      at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:947) 
      at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1126) 
      at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:739) 
      at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1489) 
      at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:486) 
      at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:141) 
      at android.support.v4.view.ViewPager.populate(ViewPager.java:1073) 
      at android.support.v4.view.ViewPager.populate(ViewPager.java:919) 
      at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1441) 
      at android.view.View.measure(View.java:16831) 
      at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5245) 
      at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1410) 
      at android.widget.LinearLayout.measureVertical(LinearLayout.java:695) 
      at android.widget.LinearLayout.onMeasure(LinearLayout.java:588) 
      at android.view.View.measure(View.java:16831) 
      at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5245) 
      at android.widget.FrameLayout.onMeasure(FrameLayout.java:310) 
      at android.view.View.measure(View.java:16831) 
      at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5245) 
      at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1410) 
      at android.widget.LinearLayout.measureVertical(LinearLayout.java:695) 
      at android.widget.LinearLayout.onMeasure(LinearLayout.java:588) 
      at android.view.View.measure(View.java:16831) 
      at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5245) 
      at android.widget.FrameLayout.onMeasure(FrameLayout.java:310) 
      at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2586) 
      at android.view.View.measure(View.java:16831) 
      at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2189) 
      at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1352) 
      at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1535) 
      at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1249) 
      at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6364) 
      at android.view.Choreographer$CallbackRecord.run(Choreographer.java:791) 
      at android.view.Choreographer.doCallbacks(Choreographer.java:591) 
      at android.view.Choreographer.doFrame(Choreographer.java:561) 
      at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:777) 
      at android.os.Handler.handleCallback(Handler.java:730) 
      at android.os.Handler.dispatchMessage(Handler.java:92) 
      at android.os.Looper.loop(Looper.java:137) 
      at android.app.ActivityThread.main(ActivityThread.java:5419) 
      at java.lang.reflect.Method.invokeNative(Native Method) 
      at java.lang.reflect.Method.invoke(Method.java:525) 
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1209) 
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1025) 
      at dalvik.system.NativeStart.main(Native Method) 

Редактировать 1: Вот мой AndroidManifest.xml файл:

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="com.nzf.nzf.nzfmap" > 

    <uses-permission android:name="android.permission.INTERNET" /> 
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> 
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 
    <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" /> 
    <!-- 
The ACCESS_COARSE/FINE_LOCATION permissions are not required to use 
     Google Maps Android API v2, but are recommended. 
    --> 
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> 
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> 

    <application 
     android:allowBackup="true" 
     android:icon="@drawable/ic_launcher" 
     android:label="@string/app_name" 
     android:theme="@style/AppTheme" > 
     <meta-data 
      android:name="com.google.android.gms.version" 
      android:value="@integer/google_play_services_version" /> 
     <meta-data 
      android:name="com.google.android.maps.v2.API_KEY" 
      android:value="@string/google_maps_key" /> 

     <activity 
      android:name="com.nzf.nzf.nzfmap.MainActivity" 
      android:label="@string/title_activity_maps" > 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 
       <category android:name="android.intent.category.LAUNCHER" /> 
      </intent-filter> 
     </activity> 
    </application> 

</manifest> 

Answer 1

линии 66 из вашего MapsFragment заменить:

// Try to obtain the map from the SupportMapFragment. 
mMap = ((SupportMapFragment)getFragmentManager().findFragmentById(R.id.map)) 
    .getMap(); 

по:

// Try to obtain the map from the SupportMapFragment. 
mMap = ((SupportMapFragment)getChildFragmentManager().findFragmentById(R.id.map)) 
    .getMap(); 

Потому что ваш фрагмент карты фрагмент в фрагменте, и не управляется верхней FragmentManager уровня.

Кроме того, я не уверен, но вы можете настроить вашу карту асинхронно:

((SupportMapFragment) getChildFragmentManager().findFragmentById(R.id.map)).getMapAsync(
    new OnMapReadyCallback() { 
     @Override 
     public void onMapReady(GoogleMap googleMap) { 
      mMap = googleMap; 
      setUpMap(); 
     } 
    }); 

Answer 2

Вы можете сделать это как обычный фрагмент.

public void replaceFragment(Fragment fragment, String fragmentTag){ 
      FragmentManager fragmentManager = getFragmentManager(); 
      FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction(); 
      fragmentTransaction.replace(R.id.container, fragment); 
      fragmentTransaction.addToBackStack(fragmentTag); 
      fragmentTransaction.commit(); 
     } 

private void initMap(){ 
     MapFragment mapFragment = MapFragment.newInstance(); 
     replaceFragment(mapFragment, fragmentTag); 
     mapFragment.getMapAsync(this); 
    }