如何为以下代码设置优先级高精度位置

Posted 2023-04-14

【中文标题】如何为以下代码设置优先级高精度位置

【英文标题】：how to set a priority high accuracy location for the following code

【发布时间】：2019-10-13 16:32:17

【问题描述】：

有人已经在项目中编写了此代码。但是如何在位置管理器中设置优先级高精度。他们使用位置管理器来获取当前位置。

所以任何人都可以提供帮助。如果有任何改变逻辑的可能性，这将不起作用。

public class GPSTracker extends Service implements LocationListener 

    private final Context mContext;

// flag for GPS status
boolean isGPSEnabled = false;

// flag for network status
boolean isNetworkEnabled = false;


// flag for GPS status
public boolean canGetLocation = false;

Location location; // location
double latitude; // latitude
double longitude; // longitude

// The minimum distance to change Updates in meters
       private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 1; 
                      // 10 meters to 1 meters change by me ..

// The minimum time between updates in milliseconds
private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; 
                   // 1 minute

// Declaring a Location Manager
protected LocationManager locationManager;

public GPSTracker(Context context) 
    this.mContext = context;
    getLocation();


public  Location getLocation() 
    try 
        locationManager = (LocationManager) mContext.getSystemService(LOCATION_SERVICE);


        // getting GPS status
        isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);

        // getting network status
        isNetworkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);


        if (!isGPSEnabled && !isNetworkEnabled) 
            // no network provider is enabled
         else 
            this.canGetLocation = true;
            // First get location from Network Provider
            if (isNetworkEnabled) 
                locationManager.requestLocationUpdates(
                        LocationManager.NETWORK_PROVIDER,
                        MIN_TIME_BW_UPDATES,
                        MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                Log.d("Network", "Network");
                if (locationManager != null) 
                    location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
                    if (location != null) 
                        latitude = location.getLatitude();
                        longitude = location.getLongitude();
                    
                
            
            // if GPS Enabled get lat/long using GPS Services
            if (isGPSEnabled) 
                if (location == null) 
                    locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,
                            MIN_TIME_BW_UPDATES,
                            MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                    Log.d("GPS Enabled", "GPS Enabled");
                    if (locationManager != null ) 
                        location = locationManager
                                .getLastKnownLocation(LocationManager.GPS_PROVIDER);
                        if (location != null) 
                            latitude = location.getLatitude();
                            longitude = location.getLongitude();
                        
                    
                
            
        

     catch (Exception e) 
        e.printStackTrace();
    

    return location;




/**
 * Stop using GPS listener
 * Calling this function will stop using GPS in your app
 * */
//@RequiresApi(api = Build.VERSION_CODES.M)
public void stopUsingGPS()
    if (locationManager != null) 
        if (checkSelfPermission(Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED
                || checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED) 
            locationManager.removeUpdates(GPSTracker.this);
        
    



public double getLatitude()

    if(location != null)
        latitude = location.getLatitude();
    

    // return latitude
    return latitude;


/**
 * Function to get longitude
 * */

public double getLongitude()

    if(location != null)
    
        longitude = location.getLongitude();
    

    // return longitude
    return longitude;


/**
 * Function to get latitude
 * */

/**
 * Function to check GPS/wifi enabled
 * @return boolean
 * */
public boolean canGetLocation() 
    return this.canGetLocation;


/**
 * Function to show settings alert dialog
 * On pressing Settings button will lauch Settings Options
 * */
public void showSettingsAlert()
    AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);

    // Setting Dialog Title
    alertDialog.setTitle("GPS is settings");

    // Setting Dialog Message
    alertDialog.setMessage("GPS is not enabled. Do you want to go to settings menu?");

    // On pressing Settings button
    alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() 
        public void onClick(DialogInterface dialog,int which) 
            Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
            mContext.startActivity(intent);
        
    );

    // on pressing cancel button
    alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() 
        public void onClick(DialogInterface dialog, int which) 
            dialog.cancel();
        
    );

    // Showing Alert Message
    alertDialog.show();


@Override
public void onLocationChanged(Location location)


@Override
public void onProviderDisabled(String provider)


@Override
public void onProviderEnabled(String provider)


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


@Override
public IBinder onBind(Intent arg0) 
    return null;

【问题讨论】：

这是糟糕的代码。忘记它，阅读一些 android 文档并编写适当的代码。 :)

【参考方案1】：

您应该添加标准：

    LocationManager locationManager = (LocationManager) this
        .getSystemService(Context.LOCATION_SERVICE);

Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE); // Choose your accuracy requirement.

locationManager.getBestProvider(criteria, true)

【讨论】：

尝试更新高准确度。但是当我运行应用程序时它会导致崩溃