Mapbox跟蹤模式SDK 4.0.0

Question

我使用的是android Mapbox SDK 4.0.0，當位置發生變化時，我無法設置地圖的中心位置。我不明白如何使用MyLocationTrackingMode。或者如何重新獲得當前的經緯度，並將它們傳遞給CameraPosition。請有人幫助我嗎？提前致謝！

package com.detores.wristmap; 

import android.os.Bundle; 
import android.support.v7.app.AppCompatActivity; 

import com.mapbox.mapboxsdk.camera.CameraPosition; 
import com.mapbox.mapboxsdk.camera.CameraUpdateFactory; 
import com.mapbox.mapboxsdk.constants.Style; 
import com.mapbox.mapboxsdk.geometry.LatLng; 
import com.mapbox.mapboxsdk.maps.MapView; 
import com.mapbox.mapboxsdk.maps.MapboxMap; 
import com.mapbox.mapboxsdk.maps.OnMapReadyCallback; 


public class MainActivity extends AppCompatActivity { 

    private MapView mapView; 

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

     // Create a mapView 
     mapView = (MapView) findViewById(R.id.mapView); 
     mapView.onCreate(savedInstanceState); 

     mapView.getMapAsync(new OnMapReadyCallback() { 
      @Override 
      public void onMapReady(MapboxMap mapboxMap) { 

       // Set map style 
       mapboxMap.setStyleUrl(Style.MAPBOX_STREETS); 

       // Set the camera's starting position 
       CameraPosition cameraPosition = new CameraPosition.Builder() 
         .target(new LatLng(50.0051, 36.3562)) // set the camera's center position 
         .zoom(12) // set the camera's zoom level 
         .build(); 

       // Move the camera to that position 
       mapboxMap.moveCamera(CameraUpdateFactory.newCameraPosition(cameraPosition)); 
       mapboxMap.setMyLocationEnabled(true); 
      } 
     }); 
    } 

    @Override 
    public void onResume() { 
     super.onResume(); 
     mapView.onResume(); 
    } 

    @Override 
    public void onPause() { 
     super.onPause(); 
     mapView.onPause(); 
    } 

    @Override 
    public void onLowMemory() { 
     super.onLowMemory(); 
     mapView.onLowMemory(); 
    } 

    @Override 
    public void onSaveInstanceState(Bundle outState) { 
     super.onSaveInstanceState(outState); 
     mapView.onSaveInstanceState(outState); 
    } 

    @Override 
    public void onDestroy() { 
     super.onDestroy(); 
     mapView.onDestroy(); 
    } 
} 

Answer 1

如果我理解你正在試圖完成什麼，然後此代碼段可能會幫助你開始：

import android.location.Location; 
import android.os.Bundle; 
import android.support.annotation.Nullable; 
import android.support.v7.app.AppCompatActivity; 

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; 

public class MainActivity extends AppCompatActivity implements MapboxMap.OnMyLocationChangeListener { 

private MapboxMap map; 
private MapView mapView; 

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

    mapView = (MapView) findViewById(R.id.mapView); 
    mapView.onCreate(savedInstanceState); 
    mapView.getMapAsync(new OnMapReadyCallback() { 
     @Override 
     public void onMapReady(MapboxMap mapboxMap) { 
      map = mapboxMap; 

      mapboxMap.setOnMyLocationChangeListener(MainActivity.this); 
      mapboxMap.setMyLocationEnabled(true); 

     } 
    }); 

} 

@Override 
public void onMyLocationChange(@Nullable Location location) { 
    if (location != null) { 
     map.easeCamera(CameraUpdateFactory.newLatLng(new LatLng(location.getLatitude(), location.getLongitude()))); 
    } 
} 

// Add the mapView lifecycle to the activity's lifecycle methods 
@Override 
public void onResume() { 
    super.onResume(); 
    mapView.onResume(); 
} 

@Override 
public void onPause() { 
    super.onPause(); 
    mapView.onPause(); 
} 

@Override 
public void onLowMemory() { 
    super.onLowMemory(); 
    mapView.onLowMemory(); 
} 

@Override 
protected void onDestroy() { 
    super.onDestroy(); 
    mapView.onDestroy(); 
} 

@Override 
protected void onSaveInstanceState(Bundle outState) { 
    super.onSaveInstanceState(outState); 
    mapView.onSaveInstanceState(outState); 
} 
} 

希望這可以幫助你！