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获取当前位置0 0

java 来源:Abbes 6次浏览

我有我的mapsactivity,我目前的位置不再出现该按钮的问题,以及GPS跟踪器返回的位置的经度0 laltitude 0获取当前位置0 0

我觉得这是权限的问题,因为在我的智能手机我注意到该应用程序甚至不问授权,以acceder这个位置

有人有一个想法

MapsActivity.java

@Override 
public void onMapReady(GoogleMap googleMap) { 


mMap = googleMap; 


if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) 
     == PackageManager.PERMISSION_GRANTED) { 
    mMap.getUiSettings().setZoomControlsEnabled(true); 
    mMap.setMyLocationEnabled(true); 
    mMap.getUiSettings().setMapToolbarEnabled(true); 

} 
mMap.setOnMarkerDragListener(this); 
mMap.setOnMapLongClickListener(this); 

mMap.setOnMyLocationButtonClickListener(new GoogleMap.OnMyLocationButtonClickListener() { 
    @Override 
    public boolean onMyLocationButtonClick() { 
     LatLng loc = new LatLng(mMap.getMyLocation().getLatitude(), mMap.getMyLocation().getLongitude()); 

     Longitude1 = mMap.getMyLocation().getLongitude(); 
     Latitude1 = mMap.getMyLocation().getLatitude(); 
     Toast.makeText(
       getApplicationContext(), 
       "votre position", Toast.LENGTH_LONG).show(); 


     mMap.moveCamera(CameraUpdateFactory.newLatLng(loc)); 
     mMap.animateCamera(CameraUpdateFactory.zoomTo(18)); 
     return true; 
    } 
    }); 



    } 
@Override 
public void onConnected(Bundle bundle) { 
gps = new GPSTracker(MapsActivity.this); 

if(gps.canGetLocation()) { 
    Latitude1 = gps.getLatitude(); 
    Longitude1 = gps.getLongitude(); 

    moveMap(); 
    } else { 
    gps.showSettingsAlert(); 
    } 
} 

gpstracker.java

public class GPSTracker extends Service implements LocationListener{ 

private final Context context; 

boolean isGPSEnabled = false; 
boolean isNetworkEnabled = false; 
boolean canGetLocation = false; 

Location location; 

double latitude; 
double longitude; 

private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; 
private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; 

protected LocationManager locationManager; 

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

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

     isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER); 

     isNetworkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER); 

     if(!isGPSEnabled && !isNetworkEnabled) { 

     } else { 
      this.canGetLocation = true; 

      if (isNetworkEnabled) { 

       locationManager.requestLocationUpdates(
         LocationManager.NETWORK_PROVIDER, 
         MIN_TIME_BW_UPDATES, 
         MIN_DISTANCE_CHANGE_FOR_UPDATES, this); 

       if (locationManager != null) { 
        location = locationManager 
          .getLastKnownLocation(LocationManager.NETWORK_PROVIDER); 

        if (location != null) { 

         latitude = location.getLatitude(); 
         longitude = location.getLongitude(); 
        } 
       } 

      } 

      if(isGPSEnabled) { 
       if(location == null) { 
        locationManager.requestLocationUpdates(
          LocationManager.GPS_PROVIDER, 
          MIN_TIME_BW_UPDATES, 
          MIN_DISTANCE_CHANGE_FOR_UPDATES, this); 

        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; 
} 


public void stopUsingGPS() { 
    if(locationManager != null) { 
     locationManager.removeUpdates(GPSTracker.this); 
    } 
} 

public double getLatitude() { 
    if(location != null) { 
     latitude = location.getLatitude(); 
    } 
    return latitude; 
} 

public double getLongitude() { 
    if(location != null) { 
     longitude = location.getLongitude(); 
    } 

    return longitude; 
} 

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

public void showSettingsAlert() { 
    AlertDialog.Builder alertDialog = new AlertDialog.Builder(context); 

    alertDialog.setTitle("GPS is settings"); 

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

    alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() { 

     @Override 
     public void onClick(DialogInterface dialog, int which) { 
      Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS); 
      context.startActivity(intent); 
     } 
    }); 

    alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() { 

     @Override 
     public void onClick(DialogInterface dialog, int which) { 
      dialog.cancel(); 
     } 
    }); 

    alertDialog.show(); 
} 

@Override 
public void onLocationChanged(Location arg0) { 
    // TODO Auto-generated method stub 

} 

@Override 
public void onProviderDisabled(String arg0) { 
    // TODO Auto-generated method stub 

} 

@Override 
public void onProviderEnabled(String arg0) { 
    // TODO Auto-generated method stub 

} 

@Override 
public void onStatusChanged(String arg0, int arg1, Bundle arg2) { 
    // TODO Auto-generated method stub 

} 

@Override 
public IBinder onBind(Intent intent) { 
    // TODO Auto-generated method stub 
    return null; 
} 

} 

的Manifest.xml

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
package="com.example.getgpslocation" 
android:versionCode="1" 
android:versionName="1.0"> 

<uses-sdk 
    android:minSdkVersion="8" 
    android:targetSdkVersion="21" /> 

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> 
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/> 

<uses-permission android:name="android.permission.INTERNET" /> 
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 
<uses-permission android:name="android.permission.READ_PHONE_STATE" /> 
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /> 

<!-- To auto-complete the email text field in the login form with the user's  emails --> 
<uses-permission android:name="android.permission.GET_ACCOUNTS" /> 
<uses-permission android:name="android.permission.READ_PROFILE" /> 
<uses-permission android:name="android.permission.READ_CONTACTS" /> 
<uses-permission android:name="android.permission.READ_CALL_LOG" /> 
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> 
<uses-permission android:name="android.permission.INTERNET" /> 
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" /> 
<uses-feature android:name="android.hardware.location.gps" /> 
<application 
    android:name=".app.AppController" 
    android:allowBackup="true" 
    android:icon="@drawable/line" 
    android:label="@string/app_name" 
    android:theme="@style/AppTheme"> 
    <activity 
     android:name=".Main2Activity" 
     android:label="@string/app_name"> 
     <intent-filter> 
      <action android:name="android.intent.action.MAIN" /> 

      <category android:name="android.intent.category.LAUNCHER" /> 
     </intent-filter> 
    </activity> 
    <activity android:name=".activity.LoginActivity" /> 
    <activity android:name=".activity.RegisterActivity" /> 
    <activity android:name=".MainActivity" /> 

    <meta-data 
     android:name="com.google.android.geo.API_KEY" 
     android:value="@string/google_maps_key" /> 

    <activity 
     android:name=".MapsActivity" 
     android:label="@string/title_activity_maps" /> 
    <activity android:name=".Main33Activity"></activity> 
</application> 

    </manifest> 

===========解决方案如下:

你必须在manifest文件中添加的权限,检查本教程:https://developer.android.com/training/location/retrieve-current.html


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