android - 如何獲取每10米的位置更新？

Question

在我的應用程序中，我必須更新每10米旅行的具體數據。 對於我使用LocationManager獲取更新，但我沒有得到正確的答案。

我已經使用了下面的代碼：還增加了權限粗糙，精細，互聯網。

locationManager.requestLocationUpdates(getProviderName(), 10000, 
      10, locationListener); 

private String getProviderName() { 
    LocationManager locationManager = (LocationManager) this 
      .getSystemService(Context.LOCATION_SERVICE); 

    Criteria criteria = new Criteria(); 
    criteria.setPowerRequirement(Criteria.POWER_LOW); 
    // criteria.setAccuracy(Criteria.ACCURACY_FINE); 
    criteria.setSpeedRequired(true); 
    criteria.setAltitudeRequired(true); 
    criteria.setBearingRequired(true); 
    criteria.setCostAllowed(false); 
    criteria.setAccuracy(Criteria.ACCURACY_MEDIUM); 
    criteria.setSpeedAccuracy(Criteria.ACCURACY_MEDIUM); 
    criteria.setBearingAccuracy(Criteria.ACCURACY_MEDIUM); 

    return locationManager.getBestProvider(criteria, true); 
} 

這個條件說LocationManager每10秒更新一次10米是否覆蓋？我對嗎？

Answer 1

我會幫你跟我的LocationManager類：

import android.Manifest; 
import android.app.AlertDialog; 
import android.app.Service; 
import android.content.Context; 
import android.content.DialogInterface; 
import android.content.Intent; 
import android.content.pm.PackageManager; 
import android.location.Location; 
import android.location.LocationListener; 
import android.location.LocationManager; 
import android.os.Bundle; 
import android.os.IBinder; 
import android.provider.Settings; 
import android.support.v4.app.ActivityCompat; 
import android.util.Log; 
import java.text.DecimalFormat; 


public class GPSTracker extends Service implements LocationListener { 

private final Context mContext; 

// flag for GPS status 
private boolean isGPSEnabled = false; 

// flag for network status 
private boolean isNetworkEnabled = false; 

private boolean canGetLocation = false; 

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

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

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

// Declaring a Location Manager 
private LocationManager locationManager; 

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

private 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 
      this.canGetLocation = false; 
     } 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; 

} 

@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; 
} 
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; 
} 


public boolean canGetLocation() { 
    return this.canGetLocation; 
} 

/** 
* Function to show settings alert dialog 
* */ 
public void showSettingsAlert() { 

    AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext); 
    // Setting Dialog Title 
    alertDialog.setTitle("GPS settings"); 

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

    // Setting Icon to Dialog 
    //alertDialog.setIcon(R.drawable.delete); 

    // 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(); 
} 
} 

所有你需要的是您的MainActivity（或您所使用的位置的任何活動）：

GPSTracker gpsTracker = new GPSTracker(this); 

獲得位置：

gpsTracker.getLatitude(); 
gpsTracker.getLongitude();