MapView没有展示安卓
MapView没有展示安卓
提问于 2016-06-09 14:55:32
我正在使用用于Android的Google。我使用的是MapView，因为它在ViewPager中的一个片段中。不幸的是，它并没有像预期的那样显示出来。编译器给出了以下错误：
doInBackground无法检索网址：https://play.google.com/store/apps/details?myApp.
为什么？我在调试环境中使用这个，它应该查找playstore。这是我的舱单和布局：
<?xml version="1.0" encoding="utf-8"?>
<uses-feature
android:glEsVersion="0x00020000"
android:required="true"/>
<permission
android:name="faurecia.captordisplayer.permission.MAPS_RECEIVE"
android:protectionLevel="signature" />
<uses-permission android:name="faurecia.captordisplayer.permission.MAPS_RECEIVE" />
<!-- Permission pour utiliser la connexion internet -->
<uses-permission android:name="android.permission.INTERNET" />
<!-- Permission permettant de vérifier l'état de la connexion -->
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<!-- Permission pour stocker des données en cache de la map -->
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme"
android:name=".Application">
<uses-library android:name="com.google.android.maps" />
<meta-data
android:name="com.google.android.geo.API_KEY"
android:value="AIzaSyCKYeYG6IDbaRAs-rLmS3W_Zx8q742F5VU"/>
<activity
android:name=".MainActivity"
android:label="@string/title_activity_main"
android:screenOrientation="landscape">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
我的活动片段：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/black">
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<com.google.android.gms.maps.MapView
android:id="@+id/mapview"
android:layout_width="300px"
android:layout_height="300px"
android:apiKey="AIzaSyCKYeYG6IDbaRAs-rLmS3W_Zx8q742F5VU"/>
<faurecia.captordisplayer.view.GradientGauge
android:id="@+id/gradientGauge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</LinearLayout>
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical">
<faurecia.captordisplayer.view.EnginePowerGauge
android:id="@+id/engineGauge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<faurecia.captordisplayer.view.Speedmeter
android:id="@+id/speedmeter"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<faurecia.captordisplayer.view.RankingGauge
android:id="@+id/rankingGauge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</LinearLayout>
我的片段代码是：
public class HMI0Fragment extends HMIFragment implements OnMapReadyCallback {
@Bind(R.id.mapview) MapView mMapView;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
reScheduleTimerTask(TIMER_PERIOD);
mView = inflater.inflate(R.layout.fragment_hmi0, container, false);
ButterKnife.bind(this, mView);
mMapView.getMapAsync(this);
return mView;
}
@Override
public void onMapReady(GoogleMap map) {
map.moveCamera(CameraUpdateFactory.newLatLngZoom(
new LatLng(-18.142, 178.431), 2));
// Polylines are useful for marking paths and routes on the map.
map.addPolyline(new PolylineOptions().geodesic(true)
.add(new LatLng(-33.866, 151.195)) // Sydney
.add(new LatLng(-18.142, 178.431)) // Fiji
.add(new LatLng(21.291, -157.821)) // Hawaii
.add(new LatLng(37.423, -122.091)) // Mountain View
);
}}
回答 2
Stack Overflow用户
回答已采纳
发布于 2016-06-14 11:40:50
谢谢你的解释，但麻烦在别的地方。当在片段中包含MapView时，必须覆盖所有片段状态(OnResume、OnPause等)并使用MapView。以下是一个示例：
public class HMI0Fragment extends HMIFragment implements OnMapReadyCallback {
private static int TIMER_PERIOD = 4000;
private static String NAME = "HMI0";
@Bind(R.id.mapview) MapView mMapView;
private boolean mapsSupported = true;
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
MapsInitializer.initialize(getActivity());
if (mMapView != null) {
mMapView.onCreate(savedInstanceState);
}
initializeMap();
}
private void initializeMap() {
if ( mapsSupported) {
mMapView = (MapView) getActivity().findViewById(R.id.mapview);
mMapView.getMapAsync(this);
//setup markers etc...
}
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRetainInstance(true);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
reScheduleTimerTask(TIMER_PERIOD);
mView = inflater.inflate(R.layout.fragment_hmi0, container, false);
ButterKnife.bind(this, mView);
return mView;
}
@Override
public void onMapReady(GoogleMap map) {
map.moveCamera(CameraUpdateFactory.newLatLngZoom(
new LatLng(-18.142, 178.431), 2));
// Polylines are useful for marking paths and routes on the map.
map.addPolyline(new PolylineOptions().geodesic(true)
.add(new LatLng(-33.866, 151.195)) // Sydney
.add(new LatLng(-18.142, 178.431)) // Fiji
.add(new LatLng(21.291, -157.821)) // Hawaii
.add(new LatLng(37.423, -122.091)) // Mountain View
);
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
mMapView.onSaveInstanceState(outState);
}
@Override
public void onResume() {
super.onResume();
mMapView.onResume();
initializeMap();
}
@Override
public void onPause() {
super.onPause();
mMapView.onPause();
}
@Override
public void onDestroy() {
super.onDestroy();
mMapView.onDestroy();
}
@Override
public void onLowMemory() {
super.onLowMemory();
mMapView.onLowMemory();
}}
Stack Overflow用户
发布于 2016-06-10 16:20:29
要使用Google API，您必须在Google控制台上注册应用程序项目，并获得一个Google密钥，您可以将其添加到应用程序中。您需要的API密钥类型是一个Android密钥。
按照这里的说明设置映射API键：https://developers.google.com/maps/documentation/android-api/signup#release-cert
- 在Google开发人员控制台中创建一个项目
- 生成一个键以使用Maps API
- 将键添加到android清单中
只需在调用onCreate()之前调用getMapAsync()方法，一旦调用回调，就需要在MapView对象上调用onResume()。
public class MainActivity extends MapActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
if (getView() != null) {
final MapView mapView = (MapView)getView().findViewById(R.id.mapView);
mapView.onCreate(savedInstanceState);
mapView.getMapAsync(new OnMapReadyCallback() {
@Override
public void onMapReady(GoogleMap googleMap) {
LatLng coordinates = new LatLng(match.match.LocationLatitude, match.match.LocationLongitude);
googleMap.addMarker(new MarkerOptions().position(coordinates).title(match.match.LocationAddress));
googleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(coordinates, 15));
mapView.onResume();
}
}
}
}
@Override
protected boolean isRouteDisplayed() {
// TODO Auto-generated method stub
return false;
}
}下面是一个演示应用程序，演示如何使用SupportMapFragment - getMapAsync：https://github.com/googlemaps/android-samples/tree/master/ApiDemos为Android使用Maps
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/37729466
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