Question

HELO，我对应用程序有一个奇怪的问题 - 当我使用google的api作为用户位置时，gps从第二个开始并进入定位。但如果我使用mapbox，它需要15分钟才能完成它的工作，然后我必须关闭屏幕并再次打开屏幕底部显示gps徽标，然后再关闭再打开地点。什么可以做到这一点。我在网上到处搜索类似的问题，但我一无所获。我使用http://www.mapbox.com中描述的所有内容来制作它，问题仍然存在。以下是主要活动的代码：

import android.arch.lifecycle.Lifecycle;
import android.location.Location;
import android.location.LocationManager;
import android.os.PersistableBundle;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import com.mapbox.android.core.location.LocationEngine;
import com.mapbox.android.core.location.LocationEngineListener;
import com.mapbox.android.core.location.LocationEnginePriority;
import com.mapbox.android.core.location.LocationEngineProvider;
import com.mapbox.android.core.permissions.PermissionsListener;
import com.mapbox.android.core.permissions.PermissionsManager;
import com.mapbox.mapboxsdk.Mapbox;
import com.mapbox.mapboxsdk.camera.CameraUpdateFactory;
import com.mapbox.mapboxsdk.geometry.LatLng;
import com.mapbox.mapboxsdk.maps.MapView;
import com.mapbox.mapboxsdk.maps.MapboxMap;
import com.mapbox.mapboxsdk.maps.OnMapReadyCallback;
import com.mapbox.mapboxsdk.plugins.locationlayer.LocationLayerPlugin;
import com.mapbox.mapboxsdk.plugins.locationlayer.modes.CameraMode;
import com.mapbox.mapboxsdk.plugins.locationlayer.modes.RenderMode;
import java.util.List;
public class MbooooActivity extends AppCompatActivity implements OnMapReadyCallback,
LocationEngineListener, PermissionsListener{
    private MapView mapView;
    private MapboxMap mbm;
    private PermissionsManager permissionsManager;
    private LocationEngine locationEngine;
    private LocationLayerPlugin locationLayerPlugin;
    private Location lokation;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Mapbox.getInstance(this,getString(R.string.toke));
        setContentView(R.layout.activity_mboooo);
        mapView=(MapView)findViewById(R.id.mapView);
        mapView.onCreate(savedInstanceState);
        mapView.getMapAsync(this);
    }
    @Override
    public void onMapReady(MapboxMap mapboxMap) {
        mbm=mapboxMap;
        enableLocation();
    }
    private void enableLocation(){
        if(PermissionsManager.areLocationPermissionsGranted(this)){
            initialiseLocationEngine();
            initialiseLocationLayer();
        }else{
            permissionsManager=new PermissionsManager(this);
            permissionsManager.requestLocationPermissions(this);
        }
    }
    @SuppressWarnings("MissingPermission")
    private void initialiseLocationEngine(){
        locationEngine=new LocationEngineProvider(this).obtainBestLocationEngineAvailable();
        locationEngine.setPriority(LocationEnginePriority.HIGH_ACCURACY);
        locationEngine.activate();
        Location prevlok=locationEngine.getLastLocation();
        if(prevlok!=null){
            lokation=prevlok;
            setCamera(prevlok);
        }else{
            locationEngine.addLocationEngineListener(this);
        }
    }
    @SuppressWarnings("MissingPermission")
    private void initialiseLocationLayer(){
        locationLayerPlugin=new LocationLayerPlugin(mapView,mbm,locationEngine);
        locationLayerPlugin.setLocationLayerEnabled(true);
        locationLayerPlugin.setCameraMode(CameraMode.TRACKING);
        locationLayerPlugin.setRenderMode(RenderMode.NORMAL);
        Lifecycle lifecycle=getLifecycle();
        lifecycle.addObserver(locationLayerPlugin);
    }
    private void setCamera(Location location){
        mbm.animateCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(location.getLatitude(),
                location.getLongitude()),16.0));
    }
    @SuppressWarnings("MissingPermission")
    @Override
    public void onConnected() {
        locationEngine.requestLocationUpdates();
    }
    @Override
    public void onLocationChanged(Location location) {
        if(location!=null){
        lokation=location;
        setCamera(lokation);}
    }
    @Override
    public void onExplanationNeeded(List<String> permissionsToExplain) {
    }
    @Override
    public void onPermissionResult(boolean granted) {
        if(granted){
            enableLocation();
        }
    }
    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
//        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        permissionsManager.onRequestPermissionsResult(requestCode,permissions,grantResults);
    }
    @SuppressWarnings("MissingPermission")
    @Override
    protected void onStart() {
        super.onStart();
        mapView.onStart();
        if(locationEngine!=null){
        locationEngine.requestLocationUpdates();
        locationEngine.addLocationEngineListener(this);}
    }
    @Override
    protected void onPause() {
        super.onPause();
        mapView.onPause();
    }
    @Override
    protected void onDestroy() {
        super.onDestroy();
        if(locationEngine!=null){
        locationEngine.removeLocationEngineListener(this);
        locationEngine.removeLocationUpdates();}
    }
    @Override
    protected void onStop() {
        super.onStop();
        mapView.onStop();
        locationEngine.removeLocationEngineListener(this);
        locationEngine.removeLocationUpdates();
    }
    @Override
    protected void onResume() {
        super.onResume();
        mapView.onResume();
        locationEngine.removeLocationUpdates();
        locationEngine.removeLocationEngineListener(this);
    }
    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        mapView.onSaveInstanceState(outState);
    }
}

Answer 1

您应该独立于上一个位置收听位置更新：

private void initialiseLocationEngine(){
    locationEngine=new LocationEngineProvider(this).obtainBestLocationEngineAvailable();
    locationEngine.setPriority(LocationEnginePriority.HIGH_ACCURACY);
    locationEngine.activate();
    locationEngine.addLocationEngineListener(this);

    Location prevlok=locationEngine.getLastLocation();
    if(prevlok!=null){
        lokation=prevlok;
        setCamera(prevlok);
    }
}

此外，您可以设置：

locationEngine.setPriority(LocationEnginePriority.HIGH_ACCURACY);
locationEngine.setInterval(0);
locationEngine.setFastestInterval(1000);

地图框位置GPS不起作用

1 个答案: