显示java.lang.NullPointerException:CameraUpdateFactory未初始化logcat的例外 [英] java.lang.NullPointerException: CameraUpdateFactory is not initialized logcat exception
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问题描述
我正在使用谷歌地图。我能够成功地创建并能显示一个谷歌地图。现在,我想补充 CameraUpdate(纬度,经度)
。我一派,我发现了一些源$ C $ C,但我得到一个 NullPointerException异常
。
在LogCat中的错误信息是:
显示java.lang.NullPointerException:CameraUpdateFactory未初始化
这是我的源。我究竟做错了什么?
公共类StradaContact扩展片段{
公共最后静态字符串变量= StradaContact.class.getSimpleName();
私人MapView类mMapView;
私人GoogleMap的MMAP;
私人捆绑mBundle;
双经度= 44.79299800000001,纬度= 41.709981;
公共StradaContact(){
}
公共静态StradaContact的newInstance(){
返回新StradaContact();
}
@覆盖
公共查看onCreateView(LayoutInflater充气,容器的ViewGroup,
捆绑savedInstanceState){
查看rootView = inflater.inflate(R.layout.strada_contact,集装箱,假);
mMapView =(图形页面)rootView.findViewById(R.id.pointMap);
mMapView.onCreate(mBundle);
setUpMapIfNeeded(rootView);
返回rootView;
}
@覆盖
公共无效的onCreate(包savedInstanceState){
super.onCreate(savedInstanceState);
mBundle = savedInstanceState;
}
私人无效setUpMapIfNeeded(查看inflatedView){
如果(MMAP == NULL){
MMAP =((图形页面)inflatedView.findViewById(R.id.pointMap))的GetMap()。
如果(MMAP!= NULL){
CameraUpdate中心= CameraUpdateFactory.newLatLng(新经纬度(纬度,经度));
CameraUpdate变焦= CameraUpdateFactory.zoomTo(15);
mMap.moveCamera(中心);
mMap.animateCamera(变焦);
}
}
}
@覆盖
公共无效onResume(){
super.onResume();
mMapView.onResume();
}
@覆盖
公共无效的onPause(){
super.onPause();
mMapView.onPause();
}
@覆盖
公共无效的onDestroy(){
mMapView.onDestroy();
super.onDestroy();
}
}
< com.google.android.gms.maps.MapView
机器人:ID =@ + ID / pointMap
机器人:名称=com.google.android.gms.maps.MapFragment
机器人:layout_width =match_parent
机器人:layout_height =match_parent
类=com.google.android.gms.maps.MapFragment/>
解决方案
在的onCreate试试这个:
尝试{
MapsInitializer.initialize(本);
}赶上(GooglePlayServicesNotAvailableException E){
e.printStackTrace();
}
I'm working with Google Maps. I am able to successfully create and can show a Google Map. Now I want to add CameraUpdate(latitude, longitude)
. I googled and I found some source code but I'm getting a NullPointerException
.
The LogCat error message is:
java.lang.NullPointerException: CameraUpdateFactory is not initialized
This is my source. What am I doing wrong?
public class StradaContact extends Fragment {
public final static String TAG = StradaContact.class.getSimpleName();
private MapView mMapView;
private GoogleMap mMap;
private Bundle mBundle;
double longitude = 44.79299800000001, latitude = 41.709981;
public StradaContact() {
}
public static StradaContact newInstance() {
return new StradaContact();
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.strada_contact, container,false);
mMapView = (MapView) rootView.findViewById(R.id.pointMap);
mMapView.onCreate(mBundle);
setUpMapIfNeeded(rootView);
return rootView;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mBundle = savedInstanceState;
}
private void setUpMapIfNeeded(View inflatedView) {
if (mMap == null) {
mMap = ((MapView) inflatedView.findViewById(R.id.pointMap)).getMap();
if (mMap != null) {
CameraUpdate center = CameraUpdateFactory.newLatLng(new LatLng(latitude, longitude));
CameraUpdate zoom = CameraUpdateFactory.zoomTo(15);
mMap.moveCamera(center);
mMap.animateCamera(zoom);
}
}
}
@Override
public void onResume() {
super.onResume();
mMapView.onResume();
}
@Override
public void onPause() {
super.onPause();
mMapView.onPause();
}
@Override
public void onDestroy() {
mMapView.onDestroy();
super.onDestroy();
}
}
<com.google.android.gms.maps.MapView
android:id="@+id/pointMap"
android:name="com.google.android.gms.maps.MapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.MapFragment" />
解决方案
Try this in "onCreate":
try {
MapsInitializer.initialize(this);
} catch (GooglePlayServicesNotAvailableException e) {
e.printStackTrace();
}
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