Google Map:onMapReadyCallback 无法应用于此 activity

Question

我是尝试使用 google 地图的初学者，我已按照此处给出的说明进行操作：https://developers.google.com/maps/documentation/android-api/map?hl=zh-tw

但我卡在了mapFragment.getMapAsync(this)，一直找不到答案。

代码如下：

public class GoogleMapPage extends FragmentActivity   {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.googlemap);
    MapFragment mapFragment = (MapFragment) getFragmentManager().findFragmentById(R.id.map);
    mapFragment.getMapAsync(this)<---it said "onMapReadyCallback can not be applied to this activity;
}

}

这里是 XML:

     <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center_horizontal">


<fragment
    android:layout_width="300dp"
    android:layout_height="300dp"
    android:name="com.google.android.gms.maps.MapFragment"
    android:id="@+id/map"
    tools:layout="@layout/googlemap" />

Answer 1

您需要让 Activity 实现 OnMapReadyCallback 并覆盖方法 void onMapReady(GoogleMap googleMap)。

public class GoogleMapPage extends FragmentActivity implements OnMapReadyCallback   {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.googlemap);
        MapFragment mapFragment = (MapFragment) getFragmentManager().findFragmentById(R.id.map);
        mapFragment.getMapAsync(this) // <---it said "onMapReadyCallback can not be applied to this activity;
    }


    @Override
    public void onMapReady(GoogleMap googleMap) {
        // Do stuff with the map here!
    }

}