Java LocationManager.getAllProviders方法代碼示例

import android.location.LocationManager; //導入方法依賴的package包/類
/**
 * Restituice la posizione più accurata e più recente del dispositivo, scelta tra tutti i location provider disponibili.
 */
public static Location getBestLastKnownLocation(Context context) {
    LocationManager locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
    List<String> providers = locationManager.getAllProviders();
    Location bestLocation = null;

    for (String provider : providers) {
        try {
            Location location = locationManager.getLastKnownLocation(provider);
            if (bestLocation == null || location != null
                    && location.getElapsedRealtimeNanos() > bestLocation.getElapsedRealtimeNanos()
                    && location.getAccuracy() > bestLocation.getAccuracy())
                bestLocation = location;
        } catch (SecurityException ignored) {
        }
    }

    return bestLocation;
}
 

import android.location.LocationManager; //導入方法依賴的package包/類
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    mgr = (LocationManager) getSystemService(Context.LOCATION_SERVICE);

    List<String> providers = mgr.getAllProviders();

    //apenas habilitados
    //providers = mgr.getProviders(true);

    adapter=new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, providers);
    setListAdapter(adapter);
}
 

import android.location.LocationManager; //導入方法依賴的package包/類
/**
 * Returns the most accurate and timely previously detected location. Where
 * the last result is beyond the specified maximum distance or latency a
 * one-off location update is returned via the {@link LocationListener}
 *
 * @param minDistance
 *            - meter Minimum distance before we require a location update.
 * @param latestTime
 *            - minisecond the lastest time required between location
 *            updates.
 * @return The most accurate and / or timely previously detected location.
 */
public static Location getLastBestLocation(Application application, int minDistance, long latestTime) {
	LocationManager locationManager = (LocationManager) application
			.getSystemService(Context.LOCATION_SERVICE);
	Location bestResult = null;
	float bestAccuracy = Float.MAX_VALUE;
	long bestTime = Long.MIN_VALUE;

	// Iterate through all the providers on the system, keeping
	// note of the most accurate result within the acceptable time limit.
	// If no result is found within maxTime, return the newest Location.
	List<String> matchingProviders = locationManager.getAllProviders();
	for (String provider : matchingProviders) {
		Location location = locationManager.getLastKnownLocation(provider);

		if (location != null) {
			float accuracy = location.getAccuracy();
			long time = location.getTime();

			if ((time > latestTime && accuracy < bestAccuracy)) {
				bestResult = location;
				bestAccuracy = accuracy;
				bestTime = time;
			} else if (time < latestTime && bestAccuracy == Float.MAX_VALUE
					&& time > bestTime) {
				bestResult = location;
				bestTime = time;
			}
		}
	}


	return bestResult;
}