我试图在Android Studio中显示ArcGis的MapView。我使用Map Fragments,我在xml中放入Map和其他UI。把MapView
元素放到布局文件中总是会崩溃,所以我这样做:
my_main_activity.xml
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/maps_app_activity_drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<!-- The main content view -->
<FrameLayout
android:id="@+id/maps_app_activity_content_frame"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<!-- The navigation drawer -->
<ListView
android:id="@+id/maps_app_activity_left_drawer"
style="@style/drawer_listView_style"
android:layout_width="240dp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:background="@android:color/darker_gray"
android:choiceMode="singleChoice"
android:divider="@color/esri_gray"
android:dividerHeight="1px" />
map_fragment_layout.xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/map_fragment_map_container_frame_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- The map configuration -->
<com.esri.android.map.MapView
android:id="@+id/map_layout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
initExtent = "-9934033.827 1537316.31 -9933312.043 1537940.728" > <!-- xmin ymin xmax ymax -->
</com.esri.android.map.MapView>
我的映射片段类保存MapView
的每个配置:
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
mMapContainer = (FrameLayout) inflater.inflate(R.layout.map_fragment_layout,container,false);
// Add dynamic layer to MapView (Base)
// Retrieve the map and initial extent from XML layout
MapView mapView = (MapView)mMapContainer.findViewById(R.id.map_layout);
ArcGISDynamicMapServiceLayer baseMap = new ArcGISDynamicMapServiceLayer(baseMapURL);
mapView.addLayer(baseMap);
//Creates a dynamic layer using service URL
ArcGISDynamicMapServiceLayer dynamicLayer = new ArcGISDynamicMapServiceLayer(dynamicMapURL);
//Adds layer into the 'MapView'
mapView.addLayer(dynamicLayer);
// Set the MapView to allow the user to rotate the map when as part of a pinch gesture.
setMapView(mapView);
mapView.zoomin();
return mMapContainer;
}
功能setMapView
配置MapView的其余选项:
private void setMapView(final MapView mapView) {
mMapView = mapView;
mMapView.setEsriLogoVisible(false);
mMapView.enableWrapAround(true);
mapView.setAllowRotationByPinch(true);
// Creating an inflater
mInflater = (LayoutInflater) getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
// Setting up the layout params for the searchview and searchresult layout
mlayoutParams = new FrameLayout.LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.WRAP_CONTENT, Gravity.LEFT | Gravity.TOP);
mlayoutParams.setMargins(LEFT_MARGIN_SEARCH, TOP_MARGIN_SEARCH,RIGHT_MARGIN_SEARCH, BOTTOM_MARGIN_SEARCH);
// set MapView into the activity layout
mMapContainer.addView(mMapView);
// Displaying the searchbox layout
showSearchBoxLayout();
调试后出现这个错误:
java.lang.RuntimeException: Unable to start activity ComponentInfo{zero.ucamaps/zero.ucamaps.MainActivity}: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2325)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
at android.app.ActivityThread.access$800(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Caused by: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
at android.view.ViewGroup.addViewInner(ViewGroup.java:3936)
at android.view.ViewGroup.addView(ViewGroup.java:3786)
at android.view.ViewGroup.addView(ViewGroup.java:3727)
at android.view.ViewGroup.addView(ViewGroup.java:3700)
at zero.ucamaps.MapFragment.setMapView(MapFragment.java:313)
at zero.ucamaps.MapFragment.onCreateView(MapFragment.java:209)
at android.app.Fragment.performCreateView(Fragment.java:2053)
我已经尝试从它的父从getMapView()返回之前删除MapView,这仍然崩溃。如有任何帮助,不胜感激。
您试图将MapView
添加到同一容器两次,一次在Java中,一次在XML中。
在map_fragment_layout.xml
中,您将MapView
创建为FrameLayout
的子map_fragment_map_container_frame_layout
。很好。
然后在setMapView
中调用mMapContainer.addView(mMapView)
,它试图再次添加MapView
作为同一FrameLayout
的子节点。这会导致异常,并且是不必要的。删除那行代码