gps定位

	private void getLocation() {
		// 获取位置管理服务
		String serviceName = Context.LOCATION_SERVICE;
		locationManager = (LocationManager) this.getSystemService(serviceName);
		// 查找到服务信息
		Criteria criteria = new Criteria();
		criteria.setAccuracy(Criteria.ACCURACY_FINE); // 高精度
		criteria.setAltitudeRequired(false);
		criteria.setBearingRequired(false);
		criteria.setCostAllowed(true);
		criteria.setPowerRequirement(Criteria.POWER_LOW); // 低功耗
		provider = locationManager.getBestProvider(criteria, true); // 获取GPS信息
		orientation();
		listener = new LocationListener() {

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

			@Override
			public void onProviderEnabled(String provider) {
			}

			@Override
			public void onProviderDisabled(String provider) {
			}

			@Override
			public void onLocationChanged(Location location) {
			}
		};
		locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 100 * 1000, 500, listener);
	}

	private void orientation() {
		new Thread(new Runnable() {
			@Override
			public void run() {
				while (truevalue == true) {
					try {
						Thread.sleep(1500);
					} catch (InterruptedException e) {
						e.printStackTrace();
					}
					location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); // 通过GPS获取位置
					Message message = new Message();
					if (location == null) {
						message.what = 1;
					} else {
						message.what = 0;
					}
					hand.sendMessage(message);
				}
			}
		}).start();
	}

	Handler hand = new Handler() {
		@Override
		public void handleMessage(Message msg) {
			super.handleMessage(msg);
			if (msg.what == 1) {
				//				show("gps无法定位");
			} 
		}
	};

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