使用片段

Question

我正在努力使用谷歌地图。我正在使用带有碎片的抽屉，所以我必须使用MapView afaik（没有片段调用片段）。

首先我有授权失败，所以我重新生成了一个密钥，运行了keytool，我的google_maps_api.xml是正确的，因此有关授权问题的消息消失了。我仍然看不到任何内容，我有一个关于StrictModeDiskReadViolation的奇怪消息。

这是我在logcat中得到的：

12-15 20:41:14.842 703-703/com.bernard_zelmans.check I/Google Maps Android API: Google Play services package version: 10084448
12-15 20:41:14.842 703-703/com.bernard_zelmans.check W/f: Suppressed StrictMode policy violation: StrictModeDiskReadViolation
12-15 20:41:14.842 703-703/com.bernard_zelmans.check W/f: Suppressed StrictMode policy violation: StrictModeDiskWriteViolation
12-15 20:41:14.882 703-703/com.bernard_zelmans.check W/f: Suppressed StrictMode policy violation: StrictModeDiskReadViolation
12-15 20:41:14.882 703-25272/com.bernard_zelmans.check W/f: Suppressed StrictMode policy violation: StrictModeDiskReadViolation
12-15 20:41:14.882 703-703/com.bernard_zelmans.check W/f: Suppressed StrictMode policy violation: StrictModeDiskWriteViolation
12-15 20:41:14.882 703-25274/com.bernard_zelmans.check W/f: Suppressed StrictMode policy violation: StrictModeDiskReadViolation

这是我的应用程序的快照：

这是我的代码：

public class PortFragment extends Fragment implements OnMapReadyCallback {
    Context context;
    View view;

    MapView mapView;
    GoogleMap map;
    LatLng CENTER = null;

    public LocationManager locationManager;
    private GoogleMap googleMap;
    double longitude = 0;
    double latitude = 0;

    public PortFragment() {
        // Required empty public constructor
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        view = inflater.inflate(R.layout.portscan, null);
        MapsInitializer.initialize(this.getActivity());
        mapView = (MapView) view.findViewById(R.id.mapView);
        mapView.onCreate(savedInstanceState);
        mapView.getMapAsync(this);
        return (view);

    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        context = getActivity().getApplicationContext();
    }

    @Override
    public void onMapReady(GoogleMap map) {
        setUpMap();
        googleMap = map;
        LatLng sydney = new LatLng(-34, 151);
        googleMap.addMarker(new MarkerOptions().position(sydney).title("Marker in Sydney"));
        googleMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));
    }

    public void setUpMap() {
        googleMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
        googleMap.setMyLocationEnabled(true);
        googleMap.setTrafficEnabled(true);
        googleMap.setIndoorEnabled(true);
    }

下面是我的manifest.xml：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.bernard_zelmans.check">

    <uses-feature
        android:glEsVersion="0x00020000"
        android:required="true" />

    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.STORAGE" />
    <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

    <application
        android:allowBackup="true"
        android:configChanges="keyboardHidden|screenSize"
        android:icon="@mipmap/ic_launcher"
        android:label="Test"
        android:logo="@drawable/ic_launcher"
        android:screenOrientation="portrait"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".Activities.Settings" />
        <activity android:name=".Activities.About" />

        <service
            android:name=".Service"
            android:exported="false" />

        <meta-data
            android:name="com.google.android.gms.version"
            android:value="@integer/google_play_services_version" />

        <meta-data
            android:name="com.google.android.geo.API_KEY"
            android:value="@string/google_maps_key" />


    </application>

</manifest>

Answer 1

如果您想在片段中添加地图，则不应添加像这样的创建方式。您应该像在布局中一样在布局中添加它，但是在onCreateView（）方法中，您应该获取视图并直接在其上调用getMapAsync：

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

    view = inflater.inflate(R.layout.portscan, container);       
    MapFragment mapFragment = (MapFragment) getChildFragmentManager().findFragmentById(R.id.map);
    mapFragment.getMapAsync(this);

    return (view);

}   

在布局中：

<fragment xmlns:android="http://schemas.android.com/apk/res/android"
    android:name="com.google.android.gms.maps.MapFragment"
    android:id="@+id/map"
    android:layout_width="match_parent"
    android:layout_height="match_parent"/>

如您所见，您首先在布局中添加地图片段，然后在您自己的片段中处理它。

你应该看一下android gmap文档：

https://developers.google.com/maps/documentation/android-api/map