java 片段布局内的 MapView（android maps api v2）不显示
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MapView (android maps api v2) inside fragment layout doesnt show
提问by DixieFlatline
I am using viewpager to swipe between 2 action bar tabs (used eclipse wizard for this kind of navigation). I am using android maps v2 api.
我正在使用 viewpager 在 2 个操作栏选项卡之间滑动（使用 eclipse 向导进行这种导航）。我正在使用 android maps v2 api。
I want to have mapview, button and textview inside one of my tabs (i guess having mapfragment is not possible).
我想在我的一个选项卡中包含 mapview、button 和 textview（我想不可能有 mapfragment）。
I inflate layout for my fragment from xml like this:
我从 xml 中为我的片段膨胀布局，如下所示：
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.first_tab_fragment, container, false);
}
}
My first_tab_fragment.xml:
我的 first_tab_fragment.xml：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<com.google.android.gms.maps.MapView
android:id="@+id/mapview"
android:layout_width="100dip"
android:layout_height="100dip"
android:layout_alignParentTop="true"
android:layout_alignRight="@+id/textView1"
android:layout_marginRight="15dp" >
</com.google.android.gms.maps.MapView>
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/textView1"
android:layout_centerHorizontal="true"
android:text="Button" />
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignRight="@+id/button1"
android:layout_marginBottom="133dp"
android:text="TextView" />
MapView is not displayed, just textview and button. I also get no errors. Do i have to write some code to initialize mapview?
MapView 不显示，只显示文本视图和按钮。我也没有收到任何错误。我是否必须编写一些代码来初始化 mapview？
回答by DixieFlatline
I solved it by adding this code to onCreateView:
我通过将此代码添加到 onCreateView 解决了它：
// Gets the MapView from the XML layout and creates it
mapView = (MapView) v.findViewById(R.id.mapview);
mapView.onCreate(savedInstanceState);
mapView.onResume(); //without this, map showed but was empty
// Gets to GoogleMap from the MapView and does initialization stuff
map = mapView.getMap();
map.getUiSettings().setMyLocationButtonEnabled(false);
map.setMyLocationEnabled(true);
// Needs to call MapsInitializer before doing any CameraUpdateFactory calls
try {
MapsInitializer.initialize(this.getActivity());
} catch (GooglePlayServicesNotAvailableException e) {
e.printStackTrace();
}
// Updates the location and zoom of the MapView
CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(new LatLng(44.14, 14.2), 10);
map.animateCamera(cameraUpdate);
