如何使用谷歌地图V2片段里面？ [英] How to use google map V2 inside fragment?
问题描述
我有一个片段是Viewpager的一部分，我想使用谷歌地图V2的片段中。这是我试过到目前为止，
I have a fragment which is a part of Viewpager, and I want to use Google Map V2 inside that fragment. This is what I have tried so far,
在我的片段，
private SupportMapFragment map;
private GoogleMap mMapView;
@Override
public void onActivityCreated(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onActivityCreated(savedInstanceState);
FragmentManager fm = getChildFragmentManager();
map = (SupportMapFragment) fm.findFragmentById(R.id.map);
if (map == null) {
map = SupportMapFragment.newInstance();
fm.beginTransaction().replace(R.id.map, map).commit();
}
}
@Override
public void onResume() {
super.onResume();
if (mMapView == null) {
mMapView = map.getMap();
Marker hamburg = mMapView.addMarker(new MarkerOptions().position(HAMBURG)
.title("Hamburg"));
Marker kiel = mMapView.addMarker(new MarkerOptions()
.position(KIEL)
.title("Kiel")
.snippet("Kiel is cool")
.icon(BitmapDescriptorFactory
.fromResource(R.drawable.ic_launcher)));
mMapView.moveCamera(CameraUpdateFactory.newLatLngZoom(HAMBURG, 15));
// Zoom in, animating the camera.
mMapView.animateCamera(CameraUpdateFactory.zoomTo(10), 2000, null);
}
}
在我的布局subfragment_info.xml，我也有，
and in my layout subfragment_info.xml , I have,
<fragment
android:id="@+id/map"
class="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="300dp"
android:layout_alignParentLeft="true"
android:layout_below="@+id/tableLayout1" />
我可以看到地图上了。但标记没有显示。我想我的谷歌地图mMapView为空。请帮我搞定这个问题解决了。先谢谢了。
I can see the map now. But the markers are not showing. I think my Google map mMapView is null. Please help me to get this problem solved. Thanks in advance.
推荐答案
创建地图，它会在你的XML布局中添加一帧
Create a frame for map in which it will be added in your xml layout
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/map_container">
<!-- The map fragments will go here -->
</RelativeLayout>
不要在XML类=com.google.android.gms.maps.SupportMapFragment 无论是在你的片段类做手工把它里面onActivityCreated
Don't include class="com.google.android.gms.maps.SupportMapFragment" in xml either in your fragment class do get it manually inside onActivityCreated
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
FragmentManager fm = getChildFragmentManager();
fragment = (SupportMapFragment) fm.findFragmentById(R.id.map_container);
if (fragment == null) {
fragment = SupportMapFragment.newInstance();
fm.beginTransaction().replace(R.id.map_container, fragment).commit();
}
/***at this time google play services are not initialize so get map and add what ever you want to it in onResume() or onStart() **/
}
@Override
public void onResume() {
super.onResume();
if (map == null) {
map = fragment.getMap();
map.addMarker(new MarkerOptions().position(new LatLng(0, 0)));
}
}
如果你们遇到任何问题，非法状态异常发生的只是下面写code
if you guys face any problem Illegal State Exception Occur just write below code
/ * *这个问题在（谷歌错误）跟踪 * <一href="http://$c$c.google.com/p/gmaps-api-issues/issues/detail?id=5064">http://$c$c.google.com/p/gmaps-api-issues/issues/detail?id=5064添加 *在标签reclicking时，code由于非法状态异常发生 * *一个短期的解决方法，固定对我来说是添加以下内容 *每次你打电话片段的onDetach（） * /
/* * This issue Is tracked in (Google Bugs) * http://code.google.com/p/gmaps-api-issues/issues/detail?id=5064 Added * Code Due to Illegal State Exception Occur when reclicking on tab * * A short-term workaround that fixed it for me is to add the following to * onDetach() of every Fragment which you call */
@Override
public void onDetach() {
super.onDetach();
try {
Field childFragmentManager = Fragment.class
.getDeclaredField("mChildFragmentManager");
childFragmentManager.setAccessible(true);
childFragmentManager.set(this, null);
} catch (NoSuchFieldException e) {
throw new RuntimeException(e);
} catch (IllegalAccessException e) {
throw new RuntimeException(e);
}
}
//如果你想显示地图活动只是// FragmentActivity写code提及延长你的活动如下
//If you want to show map in activity just extend your Activity by //FragmentActivity write code mention below
在的onCreate
In onCreate
FragmentManager fm = getSupportFragmentManager();
fragment = (SupportMapFragment) fm.findFragmentById(R.id.map_container);
if (fragment == null) {
fragment = SupportMapFragment.newInstance();
fm.beginTransaction().replace(R.id.map_container, fragment)
.commit();
}
在onResume
@Override
protected void onResume() {
super.onResume();
if (googleMap == null) {
initilizeMap();
}
}
private void initilizeMap() {
if (googleMap == null) {
googleMap = fragment.getMap();
googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
googleMap.getUiSettings().setMyLocationButtonEnabled(true);
googleMap.getUiSettings().setCompassEnabled(true);
googleMap.getUiSettings().setRotateGesturesEnabled(true);
CameraPosition cameraPosition = new CameraPosition.Builder()
.target(new LatLng(latitude, longitude)).zoom(10).build();
googleMap.animateCamera(CameraUpdateFactory
.newCameraPosition(cameraPosition));
// create marker
MarkerOptions marker = new MarkerOptions().position(new LatLng(
latitude, longitude));
// ROSE color icon
marker.icon(BitmapDescriptorFactory
.defaultMarker(BitmapDescriptorFactory.HUE_ROSE));
// adding marker
googleMap.addMarker(marker);
// check if map is created successfully or not
if (googleMap == null) {
Toast.makeText(getApplicationContext(),
"Sorry! unable to create maps", Toast.LENGTH_SHORT)
.show();
}
}
}
其他帮助可以从这些链接
<一href="https://$c$c.google.com/p/gmaps-api-issues/issues/detail?id=5064#c1">https://$c$c.google.com/p/gmaps-api-issues/issues/detail?id=5064#c1
<一href="https://developers.google.com/maps/documentation/android/map">https://developers.google.com/maps/documentation/android/map
Additional help can get from these links
https://code.google.com/p/gmaps-api-issues/issues/detail?id=5064#c1
https://developers.google.com/maps/documentation/android/map
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