我想在我的Android应用程序中包含地图,所以我遵循官方文档并最终得到这些文件
fragment_map.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="This is the map fragment"/>
<fragment
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/map"
tools:context="com.example.nirmal.attendancetracker"
class="com.google.android.gms.maps.SupportMapFragment"
/>
</LinearLayout>
MapsFragment.java:
public class MapFragment extends Fragment implements OnMapReadyCallback{
SupportMapFragment mapFragment;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View subView = inflater.inflate(R.layout.fragment_map,container,false);
mapFragment = (SupportMapFragment)getActivity().getSupportFragmentManager().findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
return subView;
}
@Override
public void onMapReady(GoogleMap googleMap) {
LatLng sydney = new LatLng(-33.852, 151.211);
googleMap.addMarker(new MarkerOptions().position(sydney)
.title("Marker in Sydney"));
googleMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));
}
}
正如您可能从我的代码中看到的那样。我试图在片段中显示地图,而片段又显示为ViewPager
的一部分。我根据文档做了一切,但是当我运行时,应用程序崩溃并出现以下错误
FATAL EXCEPTION: main Process: com.example.nirmal.attendancetracker, PID: 31903
android.view.InflateException: Binary XML file line #13: Error inflating class fragment
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:713)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
at com.example.nirmal.attendancetracker.MapFragment.onCreateView(MapFragment.java:27)
我以前见过这些错误。它们通常由错误的XML语句引起。由于我是这个地图的新手,我无法找到任何错误。
XML文件是问题吗?或者我做错了什么?
答案 0 :(得分:1)
As you are using SupportMapFragment
from Fragment
its best prectice ot Use com.google.android.gms.maps.MapView
instead of SupportMapFragment
<com.google.android.gms.maps.MapView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/map" />
Your MapFragment class as below:
public class MapFragment extends Fragment {
MapView mapView;
GoogleMap map;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View subView = inflater.inflate(R.layout.fragment_map, container, false);
mapView = (MapView) subView.findViewById(R.id.map);
mapView.onCreate(savedInstanceState);
map = mapView.getMap();
map.getUiSettings().setMyLocationButtonEnabled(false);
map.setMyLocationEnabled(true);
try {
MapsInitializer.initialize(this.getActivity());
} catch (GooglePlayServicesNotAvailableException e) {
e.printStackTrace();
}
CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(new LatLng(13.1, -37.9), 10);
map.animateCamera(cameraUpdate);
return subView;
}
@Override
public void onResume() {
mapView.onResume();
super.onResume();
}
@Override
public void onPause() {
super.onPause();
mapView.onPause();
}
@Override
public void onDestroy() {
super.onDestroy();
mapView.onDestroy();
}
}
Hope this will help~
答案 1 :(得分:0)
我有同样的问题!尝试在布局中添加android:name =“com.testing.shivam.MainActivity”到“fragment”!它解决了我的问题
<?xml version="1.0" encoding="utf-8"?>
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.SupportMapFragment"
android:name="com.testing.shivam.MainActivity"/>
如果这对您不起作用,请检查您是否在应用标记下的清单文件中为google_play_services_version正确添加了元标记,
<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />
答案 2 :(得分:0)
看起来你已经混淆了the official documentation,并试图在片段中放置片段。
我也看到你没有给你的MapFragment
课程膨胀......所以,错误似乎存在于其他地方。
class="com.google.android.gms.maps.SupportMapFragment"
引用文档......
默认情况下,定义应用程序布局的XML文件位于
res/layout/activity_maps.xml
。它包含以下代码:<fragment xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/map" tools:context=".MapsActivity" android:name="com.google.android.gms.maps.SupportMapFragment" />
地图活动Java文件
默认情况下,将命名定义maps活动的Java文件
MapsActivity.java
。它应该包含以下代码 包名称:public class MapsActivity extends FragmentActivity implements OnMapReadyCallback { private GoogleMap mMap; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_maps); SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager() .findFragmentById(R.id.map); mapFragment.getMapAsync(this); } @Override public void onMapReady(GoogleMap googleMap) { mMap = googleMap;
所以,你问题中显示的所有代码都应该是一个Activity,而不是一个片段,然后替换
getActivity().getSupportFragmentManager().findFragmentById(R.id.map)
只需
getSupportFragmentManager().findFragmentById(R.id.map)
如果您真的想扩展SupportMapFragment
课程,请先从
public class MapFragment extends SupportMapFragment
implements OnMapReadyCallback {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getMapAsync(this);
}
并在XML中加载
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/map"
tools:context=".MapsActivity"
android:name="YOUR.PACKAGE.NAME.MapFragment" /> <!--- See here --->