java - 如何使用 5.1 以上的 Android 获取 GPS 开放街道 map 上的位置

Question

我正在使用位置管理器来查找我的位置，但是当我使用大于 18 的 api 进行模拟时，我找不到位置

package br.com.josileudorodrigues.myapplication;

import android.Manifest;
import android.content.Context;
import android.content.pm.PackageManager;
import android.graphics.Canvas;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Build;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import com.cocoahero.android.geojson.GeoJSON;

import org.osmdroid.bonuspack.kml.KmlDocument;
import org.osmdroid.bonuspack.location.NominatimPOIProvider;
import org.osmdroid.bonuspack.location.POI;
import org.osmdroid.config.Configuration;
import org.osmdroid.events.MapEventsReceiver;
import org.osmdroid.events.MapListener;
import org.osmdroid.events.ScrollEvent;
import org.osmdroid.events.ZoomEvent;
import org.osmdroid.tileprovider.tilesource.TileSourceFactory;
import org.osmdroid.util.GeoPoint;
import org.osmdroid.views.MapController;
import org.osmdroid.views.MapView;
import org.osmdroid.views.Projection;
import org.osmdroid.views.overlay.FolderOverlay;
import org.osmdroid.views.overlay.MapEventsOverlay;
import org.osmdroid.views.overlay.Marker;
import org.osmdroid.views.overlay.Overlay;
import org.osmdroid.views.overlay.OverlayItem;
import org.osmdroid.views.overlay.PathOverlay;
import org.osmdroid.views.overlay.ScaleBarOverlay;
import org.osmdroid.views.overlay.infowindow.InfoWindow;
import org.osmdroid.views.overlay.infowindow.MarkerInfoWindow;
import org.osmdroid.views.overlay.mylocation.GpsMyLocationProvider;
import org.osmdroid.views.overlay.mylocation.MyLocationNewOverlay;

import java.util.ArrayList;

import static android.os.Build.VERSION_CODES.M;

public class MainActivity extends AppCompatActivity implements MapEventsReceiver, LocationListener {

    private static final int PERMISSAO_REQUERIDA =1 ;
    private MapView osm;
    private MapController mc;
    private LocationManager locationManager;
    private PathOverlay po;
    private KmlDocument kmlDocument;


    ArrayList<OverlayItem> overlayItemArray;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        osm = (MapView) findViewById(R.id.mapaId);
        osm.setTileSource(TileSourceFactory.MAPNIK);
        osm.setUseDataConnection(true);
        osm.setMultiTouchControls(true);
        osm.setClickable(true);
        osm.setBuiltInZoomControls(true);

        if (Build.VERSION.SDK_INT >= M) {
            if (ContextCompat.checkSelfPermission(this, Manifest.permission.INTERNET) != PackageManager.PERMISSION_GRANTED ||
                    ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
                String[] permissoes = {Manifest.permission.INTERNET, Manifest.permission.WRITE_EXTERNAL_STORAGE};
                requestPermissions(permissoes, PERMISSAO_REQUERIDA);
            }
        }

        osm.setMapListener(new MapListener() {
            @Override
            public boolean onScroll(ScrollEvent event) {
                Log.i("Script()", "onScroll ()");
                return true;
            }

            @Override
            public boolean onZoom(ZoomEvent event) {
                Log.i("Script()", "onZoom ()");
                return false;
            }
        });


        //onde mostra a imagem do mapa
        Context ctx = getApplicationContext();
        Configuration.getInstance().load(ctx, PreferenceManager.getDefaultSharedPreferences(ctx));

        mc = (MapController) osm.getController();
        mc.setZoom(15);
        GeoPoint center = new GeoPoint(-5.1251, -38.3640);
        mc.animateTo(center);
        addMarker(center);
// here is where the permissions are

        locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
        if (ActivityCompat.checkSelfPermission(this, 

        Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            // TODO: Consider calling
            // .
            return;
        }

        locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this);

        MapEventsOverlay mapEventsOverlay = new MapEventsOverlay(this, this);
        osm.getOverlays().add(0, mapEventsOverlay);

        // Aqui adiciona a escala do mapa
        ScaleBarOverlay scaleBarOverlay = new ScaleBarOverlay(osm);
        osm.getOverlays().add(scaleBarOverlay);

        kmlDocument = new KmlDocument();
    //    kmlDocument.parseGeoJSON(geoJsonString);


    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        switch (requestCode) {
            case PERMISSAO_REQUERIDA: {
                // Se a solicitação de permissão foi cancelada o array vem vazio.
                if (grantResults.length > 0
                        && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    // Permissão cedida, recria a activity para carregar o mapa, só será executado uma vez
                    this.recreate();
                }
            }
        }
    }


    public void addMarker(final GeoPoint center) {
        final Marker marker = new Marker(osm);
        marker.setPosition(center);
        marker.setAnchor(Marker.ANCHOR_CENTER, Marker.ANCHOR_BOTTOM);
        marker.setIcon(getResources().getDrawable(R.drawable.ic_mapa));
        marker.setDraggable(true);

        marker.setTitle("DADOS");
        marker.setSnippet(center.getLatitude()+ "," + center.getLongitude());
        marker.setSubDescription("subDescription Marker");

        marker.setInfoWindow(new CustomMarkerInfoWindow(osm));
        marker.setInfoWindowAnchor(marker.ANCHOR_CENTER, marker.ANCHOR_TOP);

        marker.setOnMarkerClickListener(new Marker.OnMarkerClickListener() {
            @Override
            public boolean onMarkerClick(Marker m, MapView mapView) {
                Log.i("Script","onMarkerClick");
                m.showInfoWindow();
                return true;
            }
        });

        marker.setOnMarkerDragListener(new Marker.OnMarkerDragListener() {
            @Override
            public void onMarkerDragStart(Marker marker) {
                Log.i("Script", "onMarkerDragStart()");
            }

            @Override
            public void onMarkerDragEnd(Marker marker) {
                Log.i("Script", "onMarkerDragEnd()");

            }

            @Override
            public void onMarkerDrag(Marker marker) {
                Log.i("Script", "onMarkerDrag()");
            }
        });

        //osm.getOverlays().clear();
        osm.getOverlays().add(new MapOverlay(this));
        osm.getOverlays().add(marker);
        osm.invalidate();

    }

    @Override
    public void onLocationChanged(Location location) {
        GeoPoint center = new GeoPoint(location.getLatitude(), location.getLongitude());
        mc.animateTo(center);
        addMarker(center);
    }

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {

    }

    @Override
    public void onProviderEnabled(String provider) {

    }

    @Override
    public void onProviderDisabled(String provider) {

    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        if (locationManager != null) {
            locationManager.removeUpdates((LocationListener) this);
        }
    }

    class MapOverlay extends Overlay {
        public MapOverlay(Context ctx) {
            super(ctx);
        }

        @Override
        public void draw(Canvas c, MapView osmv, boolean shadow) {

        }

        @Override
        public boolean onSingleTapConfirmed(MotionEvent me, MapView mv) {
            Projection p = osm.getProjection();
            GeoPoint gp = (GeoPoint) p.fromPixels((int) me.getX(), (int) me.getY());
            addMarker(gp);
            return (true);
        }
    }

    // Aqui quando eu pressionar em uma determinada parte do mapa ele
    // irá  mostrar as minhas cordenadas
    @Override
    public boolean singleTapConfirmedHelper(GeoPoint p) {

        Toast.makeText(this, "Coordenadas:\nLatitude: ("+p.getLatitude() +"\nLongitude: " +
                ""+p.getLongitude()+")" , Toast.LENGTH_SHORT).show();

        InfoWindow.closeAllInfoWindowsOn(osm); //Clicando em qualquer canto da tela, fecha o infowindow
        return (true);
    }

    @Override
    public boolean longPressHelper(GeoPoint p) {
        return false;
    }

    // InfoWindow
    public class CustomMarkerInfoWindow extends MarkerInfoWindow {

        public CustomMarkerInfoWindow(MapView mapView) {
            super(R.layout.bonuspack_bubble,mapView);
        }

        @Override
        public void onOpen(Object item){

            Marker m = (Marker) item;

            ImageView iv = (ImageView) mView.findViewById(R.id.bubble_image);
            iv.setImageResource(R.drawable.btn_moreinfo);

            TextView snippet = (TextView) mView.findViewById(R.id.bubble_title);
            snippet.setText(m.getTitle());

            TextView coordenada = (TextView) mView.findViewById(R.id. coordenadas);
            coordenada.setText(m.getSnippet());

            Button bt = (Button) mView.findViewById(R.id.bubble_buttom);
            bt.setVisibility(View.VISIBLE);
            bt.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Toast.makeText(MainActivity.this,"Salvo",Toast.LENGTH_SHORT ).show();
                }
            });
        }
    }
}

Image

您将如何修复此错误？

Answer 1

1. 您需要在 API > 21 上向用户请求 GPS 权限(我认为)
2. 每次 GPS 更新时(大约每秒一次)，您都会向 map 添加新标记。你最终会耗尽内存。考虑只更新标记的位置。
3. 查看此https://github.com/osmdroid/osmdroid/wiki/How-to-use-the-osmdroid-library#how-to-add-the-my-location-overlay该覆盖层更容易使用您自己的解决方案，但无论如何。这是使用它的工作示例 https://github.com/osmdroid/osmdroid/blob/master/OpenStreetMapViewer/src/main/java/org/osmdroid/samplefragments/location/SampleMyLocationWithClick.java (代码如下)
4. 并非所有模拟器都支持 GPS。有时你必须在菜单中翻阅才能激发它。尝试在硬件上重现。 Genymotion 效果很好

代码 fragment

 final MyLocationOverlayWithClick overlay = new    MyLocationOverlayWithClick(mMapView);
  overlay.enableFollowLocation();
  overlay.enableMyLocation();
  mMapView.getOverlayManager().add(overlay);

最后，您可以从这里运行示例应用程序，https://play.google.com/store/apps/details?id=org.osmdroid或者你可以在 github 上获取 APK。如果这在您的模拟器中不起作用，则说明模拟器已损坏或不支持 GPS