android - 对话框内的 map View

Question

MapView sch_map = (MapView) dialog.findViewById(R.id.schedule_map);
            sch_map.onCreate(savedInstanceState);

            sch_map.getMapAsync(new OnMapReadyCallback() {
                @Override
                public void onMapReady(final GoogleMap googleMap) {
                    LatLng sydney = new LatLng(-33.867, 151.206);
                    googleMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));
                }
            });

我正在通过这个在对话框中加载 map ，因为 map View 加载速度非常慢 map 正在加载但花费了很多时间这是我定义 map View 的布局。

<com.google.android.gms.maps.MapView
    android:layout_width="match_parent"
    android:layout_height="300dp"
    map:uiRotateGestures="true"
    map:uiScrollGestures="true"
    map:uiTiltGestures="true"
    map:uiZoomControls="true"
    map:uiZoomGestures="true"
    map:liteMode="true"
    android:id="@+id/schedule_map" />

Answer 1

1) 创建一个自定义dialogmap.xml

<RelativeLayout
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">

    <com.google.android.gms.maps.MapView
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/mapView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="1"
        style="@style/MyMaterialTheme.Base">

    </com.google.android.gms.maps.MapView>
</RelativeLayout>

2)在java中定义那个.xml文件

如果你想在按钮点击时打开对话框。所以在按钮点击事件中写下面的代码。

 Dialog dialog = new Dialog(getActivity());
 dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
 dialog.setContentView(R.layout.dialogmap);
 dialog.show();
 GoogleMap googleMap;


 MapView mMapView = (MapView) dialog.findViewById(R.id.mapView);
 MapsInitializer.initialize(getActivity());          

mMapView = (MapView) dialog.findViewById(R.id.mapView);
mMapView.onCreate(dialog.onSaveInstanceState());
mMapView.onResume();// needed to get the map to display immediately
googleMap = mMapView.getMap();