片段中的getMapAsync（） [英] getMapAsync() in Fragment

问题描述

这是我的片段类的一部分：

pre $ public class FragmentStoreFinderMap extends Fragment implements OnMapReadyCallback {

// Google Map
private GoogleMap googleMap;
private int i;
@Override
public void onCreate（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）;
$ b googleMap =（（SupportMapFragment）getActivity（）。getSupportFragmentManager（）。findFragmentById（
R.id.map））。getMapAsync（this）;


我在getMapAsync（this）中出错。我告诉Incompatible类型。

它表示：

必需：com.google.android.gms.map。 GoogleMap

found：void

这里是我的xml：

 <？xml version =1.0encoding =utf-8？> 
< LinearLayout xmlns：android =http://schemas.android.com/apk/res/android
 android：layout_width =match_parent
 android：layout_height =match_parent 
 android：orientation =vertical> 
< fragment class =com.google.android.gms.maps.SupportMapFragment
 android：id =@ + id / map
 android：name =com.google。 android.gms.maps.SupportMapFragment
 android：layout_width =match_parent
 android：layout_height =match_parent/> 
 
< / LinearLayout> 
  

解决方案

p>

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

在您的片段内执行此操作

 私人MapView地图查看; 
私人GoogleMap google地图; 
  

如果没有像下面的代码那样的onCreateView，则覆盖onCreateView

  @Override 
 public View onCreateView（LayoutInflater inflater，ViewGroup容器，
 Bundled savedInstanceState）{
 //为此布局膨胀布局片段
返回inflater.inflate（R.layout.your_layout，container，false）; 
} 
  

覆盖onViewCreated（）中的onViewCreated（）
把这个

  mapView =（MapView）view.findViewById（R.id.map）; 
 mapView.onCreate（savedInstanceState）; 
 mapView.onResume（）; 
 mapView.getMapAsync（this）; //当你已经在片段中实现了OnMapReadyCallback时
  

当你已经在你的片段中实现了OnMapReadyCallback时，把这个/ code这样/ /

  @Override 
 public void onMapReady（GoogleMap map ）{
 googleMap = map; 
} 
  

希望这可以帮到你。

I having trouble implementing Google Map in Fragment.

This is my the part of my fragment class:

public class FragmentStoreFinderMap extends Fragment implements OnMapReadyCallback {

// Google Map
private GoogleMap googleMap;
private int i;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

        googleMap = ((SupportMapFragment)getActivity().getSupportFragmentManager().findFragmentById(
              R.id.map)).getMapAsync(this);

I am getting an error in getMapAsync(this). I tells Incompatible type.

it says:

required: com.google.android.gms.map.GoogleMap

found: void

BTW here is my xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<fragment class="com.google.android.gms.maps.SupportMapFragment"
    android:id="@+id/map"
    android:name="com.google.android.gms.maps.SupportMapFragment"
    android:layout_width="match_parent"
    android:layout_height="match_parent"/>

</LinearLayout>

解决方案

In your XML layout you should do like this

<FrameLayout 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">

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

</FrameLayout>

inside your fragment implement this

private MapView mapView;
private GoogleMap googleMap;

override onCreateView if there is no onCreateView just like the code below

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    return inflater.inflate(R.layout.your_layout, container, false);
}

override onViewCreated() inside that onViewCreated() put this

mapView = (MapView) view.findViewById(R.id.map);
mapView.onCreate(savedInstanceState);
mapView.onResume();
mapView.getMapAsync(this);//when you already implement OnMapReadyCallback in your fragment

when you already implement OnMapReadyCallback in your fragment put this/code like this

@Override
public void onMapReady(GoogleMap map) {
    googleMap = map;
}

hope this helps you.

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