問題描述

public void onCreate() {
 locationListener = new GeoUpdateHandler();
 locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);

try {
   gps_enabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
   network_enabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
} catch (Exception ex) { 
}

if(gps_enabled) {
       locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, TIME_DURATION, 100, locationListener);
} else if(network_enabled) { // Checking for GSM
   locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, TIME_DURATION, DISTANCE, locationListener);
}   
}   
public class GeoUpdateHandler implements LocationListener {
private void getPresentLocation(Location location) {
    ... 
            //Fetch the locations
            ...
}

@Override
public void onProviderDisabled(String provider) { }

@Override
public void onProviderEnabled(String provider) { }

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

@Override
public void onLocationChanged(Location location) {
    getPresentLocation(location);
}
}

這是我的代碼片段，我的問題是，一旦在 GPS 開啟的情況下安裝了應用程序，那么一旦我們關閉 GPS，它就不會切換到 GSM 來獲取位置，反之亦然.

this is my code snippet and my issue is that once the application is installed with GPS Switched ON, then it is not switching to GSM to fetch location once we OFF GPS, and vice versa.

所以請告訴我一種根據位置提供商的可用性在 GPS 和 GSM 之間有效切換的方法.

So please tell me a way to switch efficiently between GPS and GSM according to the availability of the location provider.

注意:我的應用是一項服務.

NOTE: My app is a service.

謝謝.

我有一個廣播接收器，這就是為什么我假設一旦 GPS 開/關發生就會調用 onCreate().

I got a BroadcastReceiver, thats why i assume the onCreate() will be invoked once the GPS ON/OFF happen.

我還嘗試在 onLocationChanged(Location location) 中檢查提供程序的可用性.但它沒有幫助.

I also tried checking the provider availability in onLocationChanged(Location location). But it didnt helped.

我修改了我的 onProviderDisabled &onProviderEnabled 像這樣，請告訴我在這里做錯了什么..

I modified my onProviderDisabled & onProviderEnabled like this, Please tell what i am doing wrong here..

    public void onProviderDisabled(String provider) {
        locationManager.removeUpdates(locationListener);
        if (provider.toLowerCase().equals(LocationManager.GPS_PROVIDER)) {
            locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, TIME_DURATION, 1, locationListener);               
        } else {
            locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, TIME_DURATION, 1, locationListener);
        }   
    }

    @Override
    public void onProviderEnabled(String provider) {
        locationManager.removeUpdates(locationListener);
        if (provider.toLowerCase().equals(LocationManager.GPS_PROVIDER)) {
            locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, TIME_DURATION, 1, locationListener);
        } else {
            locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, TIME_DURATION, 1, locationListener);
        }

    }

推薦答案

得到了解決方案:

 public void onProviderDisabled(String provider) {
   locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
   if (locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
    locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0,  locationListener);
   } else {
      locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListener);
   } 
}

@Override
public void onProviderEnabled(String provider) {
  locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);   
  if (locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
    locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);
  } else {
    locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListener);
  }
}

我錯過的是locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);在 onProviderEnabled() 和 onProviderDisabled() 中.

what i missed is locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); in onProviderEnabled() and onProviderDisabled().

謝謝

這篇關于根據可用性在 gps 和網絡提供商之間切換的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！