Android--监听GPS开启和关闭

关键代码如下

?

1 2 3 4 5

getContentResolver()              .registerContentObserver(                      Settings.Secure                              .getUriFor(Settings.System.LOCATION_PROVIDERS_ALLOWED),                      false , mGpsMonitor);

完整的代码如下：

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35

public class MyActivity  extends Activity {        private final ContentObserver mGpsMonitor =  new ContentObserver( null ) {          @Override          public void onChange( boolean selfChange) {              super .onChange(selfChange);                boolean enabled = mLocationManager                      .isProviderEnabled(LocationManager.GPS_PROVIDER);             Log.i ( "gps ： " + enabled);          }      };        private LocationManager mLocationManager;        @Override      protected void onCreate(Bundle savedInstanceState) {          super .onCreate(savedInstanceState);          mLocationManager = (LocationManager) getSystemService(LOCATION_SERVICE);      }        protected void onStart() {          getContentResolver()                  .registerContentObserver(                          Settings.Secure                                  .getUriFor(Settings.Secure.LOCATION_PROVIDERS_ALLOWED),                          false , mGpsMonitor);      };        @Override      protected void onStop() {          super .onStop();          getContentResolver().unregisterContentObserver(mGpsMonitor);      } }