Android手机定位完整代码

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最新推荐文章于 2025-04-10 00:15:00 发布

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本文介绍了一个Android应用如何通过LocationManager获取当前位置信息，并利用Geocoder将经纬度转换为地址，实现地理位置的精确显示。

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public class LocationClient extends Activity implements LocationListener {
   private static final String TAG = LocationClient.class.getSimpleName();
   private static final String[] S = { "Out of Service",
           "Temporarily Unavailable", "Available" };

   private TextView output;
   private LocationManager locationManager;
   private String bestProvider;
   private Geocoder geocoder;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

       // Get the output UI
       output = (TextView) findViewById(R.id.output);

       // Get the location manager
       locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);

       geocoder = new Geocoder(this);

       // List all providers:
       List<String> providers = locationManager.getAllProviders();
       for (String provider : providers) {
           printProvider(provider);
       }

       System.out.print("The providers: " + providers);

       Criteria criteria = new Criteria();
       bestProvider = locationManager.getBestProvider(criteria, false);
       output.append("\n\nBEST Provider:\n");

       printProvider(bestProvider);

       output.append("\n\nLocations (starting with last known):");
       Location location = locationManager.getLastKnownLocation(bestProvider);
       printLocation(location);

    }

   /** Register for the updates when Activity is in foreground */
   @Override
   protected void onResume() {
       super.onResume();
       locationManager.requestLocationUpdates(bestProvider, 2000, 1, this);
   }

   /** Stop the updates when Activity is paused */
   @Override
   protected void onPause() {
       super.onPause();
       locationManager.removeUpdates(this);
   }

   public void onLocationChanged(Location location) {
       printLocation(location);
   }

   public void onProviderDisabled(String provider) {
       // let okProvider be bestProvider
       // re-register for updates
       output.append("\n\nProvider Disabled: " + provider);
   }

   public void onProviderEnabled(String provider) {
       // is provider better than bestProvider?
       // is yes, bestProvider = provider
       output.append("\n\nProvider Enabled: " + provider);
   }

   public void onStatusChanged(String provider, int status, Bundle extras) {
       output.append("\n\nProvider Status Changed: " + provider + ", Status="
               + S[status] + ", Extras=" + extras);
   }

   private void printProvider(String provider) {
       LocationProvider info = locationManager.getProvider(provider);

       Log.d(TAG, "Name:" + info.getName());
       Log.d(TAG, "Accuracy:" + info.getAccuracy());
       Log.d(TAG, "Require Cell? " + info.requiresCell());
       Log.d(TAG, "Require Network? " + info.requiresNetwork());
       Log.d(TAG, "Require Satellite? " + info.requiresSatellite());
       Log.d(TAG, "Supports Altitude? " + info.supportsAltitude());
       Log.d(TAG, "Supports Bearing? " + info.supportsBearing());
       Log.d(TAG, "Supports Speed? " + info.supportsSpeed());
        Log.d(TAG, "Power requirement?" + info.getPowerRequirement());
        Log.d(TAG, "Might steal my money?"+ info.hasMonetaryCost());

       output.append(info.toString() + "\n\n");
   }

   private void printLocation(Location location){

       if (location == null)
           output.append("\nLocation[unknown]\n\n");
       else
       {
           String text = String.format("Latitude:\t %f \nLongitude:\t %f\n Altitude:\t %f\n Bearing:\t %f\n",
                   location.getLatitude(), location.getLongitude(), location.getAltitude(), location.getBearing());
           Log.d(TAG, text);
           output.append("\n\n"+text);
       }

       try{
           List<Address> addresses = geocoder.getFromLocation(location.getLatitude(),
                   location.getLongitude(), 10);
           for(Address address: addresses)
           {
               output.append("\n"+ address.getAddressLine(0));
           }


       }catch(Exception e)
       {
           Log.e("WhereAmI", "Couldn't get Geocoder data", e);
       }
   }

}