android片段中的谷歌地图
[英]google maps in fragment android
问题描述
I'm having problems loading a google Maps in my fragment.
我在我的片段中加载谷歌地图时遇到问题。 Everything starts in a recycler view adapter that launchs the activity "ViatgeDetallViewActivity" :一切都从启动活动“ViatgeDetallViewActivity”的回收器视图适配器开始：
Context context = mActivity.getApplicationContext();
Intent intent = new Intent(context, ViatgeDetallViewActivity.class);
holder.mViatge.getId());
intent.putExtra("desc",p.getDesc());
intent.putExtra("location",p.getLocation());
mActivity.startActivityForResult(intent,ACTIVITY_View);
This is my DetallViewActivity :这是我的 DetailViewActivity ：
public class ViatgeDetallViewActivity extends AppCompatActivity {
ViatgeDetallViewFragment fragment;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_view);
Bundle extras = getIntent().getExtras();
if(extras != null)
{
String s = getIntent().getStringExtra("desc");
Location l = getIntent().getParcelableExtra("location");
Log.d("myTag", "estoy en el oncreate de detallviewActivity pasando pro extras" + s );
}
fragment = new ViatgeDetallViewFragment();
getSupportFragmentManager().beginTransaction()
.add(R.id.activity_fragment_view, fragment)
.commit();
getFragmentManager().beginTransaction().add(R.id.activity_fragment_view, fragment).commit();
}
}
With my ViatgeDetallViewFragment being :我的 ViatgeDetallViewFragment 是：
public class ViatgeDetallViewFragment extends Fragment implements OnMapReadyCallback {
private GoogleMap mMap;
private Marker mMarcadorActual;
public ViatgeDetallViewFragment() {
}
....
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_view, container, false);
SupportMapFragment mapFragment =
(SupportMapFragment)
getChildFragmentManager().findFragmentById(R.id.fragment_view_map);
mapFragment.getMapAsync(this);
return rootView;
}
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
//ask for permissions..
mMap.setMyLocationEnabled(true);
LatLng sydney = new LatLng(-34, 151);
mMarcadorActual = mMap.addMarker(new MarkerOptions().position(sydney).title("Marker in Sydney"));
}
With the layouts being , Activity_view:布局为 Activity_view：
<Linear ...
<android.support.v7.widget.Toolbar
android:id="@+id/tlbMenuView"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
android:elevation="4dp"
/>
<FrameLayout
android:id="@+id/activity_fragment_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
fragment_view:片段视图：
<LinearLayout android:id="@+id/layout_fragment_view" xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
>
..
<fragment
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/fragment_view_map"
class="com.google.android.gms.maps.MapFragment"></fragment>
</LinearLayout>
The problem comes when i try launch tje "ViatgeDetallActivity" , i get this in the log:当我尝试启动 tje "ViatgeDetallActivity" 时出现问题，我在日志中得到了这个：
FATAL EXCEPTION: main Process: com.example.usuari.myapplication3, PID: 6390 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.usuari.myapplication3/com.example.usuari.myapplication3.ViatgeDetallViewActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void com.google.android.gms.maps.SupportMapFragment.getMapAsync(com.google.android.gms.maps.OnMapReadyCallback)' on a null object reference at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3254) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3350) at android.app.ActivityThread.access$1100(ActivityThread.java:222) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1795) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:158) at android.app.ActivityThread.main(ActivityThread.java:7229) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsC
= 2 03-24 02:55:53.881 6390-7362/com.example.usuari.myapplication3 W/ResourcesManager: getTopLevelResources: /data/user/0/com.google.android.gms/app_chimera/m/00000005/DynamiteModulesA_GmsCore_prodmnc_alldpi_release.apk / 1.0 running in com.example.usuari.myapplication3 rsrc of package com.example.usuari.myapplication3 03-24 02:55:53.891 6390-7362/com.example.usuari.myapplication3 D/ResourcesManager: For user 0 new overlays fetched Null 03-24 02:55:53.891 6390-7362/com.example.usuari.myapplication3 W/ResourcesManager: getTopLevelResources: /data/user/0/com.google.android.gms/app_chimera/m/00000005/DynamiteModulesA_GmsCore_prodmnc_alldpi_release.apk / 1.0 running in com.example.usuari.myapplication3 rsrc of package com.example.usuari.myapplication3
2 个解决方案
解决方案1
5 已采纳 2017-03-24 02:06:51
Your mapFragment is null. 您的mapFragment为null。 Try this: 尝试这个：
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
MapFragment mapFragment = (MapFragment) getActivity().getFragmentManager().findFragmentById(R.id.fragment_view_map);
}
解决方案2
3 2017-11-21 11:54:31
Latest update of Google for Maps, only MapView is supported for fragments. 谷歌地图的最新更新，只有片段支持MapView。
解决方案3
2 2019-03-10 08:46:08
if the above solution does not work, try this. 如果上述解决方案不起作用，请尝试此操作。 Add this in your map fragment 在地图片段中添加此项
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_view, container, false);
SupportMapFragment map = (SupportMapFragment) getChildFragmentManager().findFragmentById(R.id.map);
map.getMapAsync(this);
return view;
}
And then add this in your calling activity. 然后在您的通话活动中添加此项。 because add method was not working so i tried replace method and it works seemlessly. 因为添加方法不起作用所以我尝试替换方法，它无缝地工作。
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_view);
fragment = new MapsActivity();
FragmentManager fm = getSupportFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
ft.replace(R.id.activity_fragment_view, fragment);
ft.commit();
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