请教一个LOCATION方面的问题

Question

如果开发GPS应用方面的软件
①先要获取一个管理器：
LocationManager locationManager  = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
②再定义一个监听：
LocationListener locationListener = new LocationListener() {
                        @Override
                        public void onStatusChanged(String provider, int status, Bundle extras) {
                                switch (status) {
                                // GPS状态为可见时
                                case LocationProvider.AVAILABLE:
                                        Log.e("TAG", "当前GPS状态为可见状态");
                                        et01.setText("LocationProvider.AVAILABLE");
                                        break;
                                // GPS状态为服务区外时
                                case LocationProvider.OUT_OF_SERVICE:
                                        Log.e("TAG", "当前GPS状态为服务区外状态");
                                        et01.setText("LocationProvider.OUT_OF_SERVICE");
                                        break;
                                // GPS状态为暂停服务时
                                case LocationProvider.TEMPORARILY_UNAVAILABLE:
                                        Log.e("TAG", "当前GPS状态为暂停服务状态");
                                        et01.setText("LocationProvider.TEMPORARILY_UNAVAILABLE");
                                        break;
                                }
                        }                        @Override
                        public void onProviderEnabled(String provider) {
                                Log.e("TAG", "onProviderEnabled");
                                et01.setText("onProviderEnabled");
                        }                        @Override
                        public void onProviderDisabled(String provider) {
                                Log.e("TAG", "onProviderDisabled");
                                et01.setText("onProviderDisabled");
                        }                        @Override
                        public void onLocationChanged(Location location) {
                                // updateView(location);
                                Log.e("TAG", "时间：" + location.getTime());
                                Log.e("TAG", "经度：" + location.getLongitude());
                                Log.e("TAG", "纬度：" + location.getLatitude());
                                Log.e("TAG", "海拔：" + location.getAltitude());
                                et01.setText("时间：" + location.getTime() + "经度：" + location.getLongitude() + "纬度："
                                                + location.getLatitude() + "海拔：" + location.getAltitude());
                        }
                };
③邦定监听到管理器上（provider直接使用GPS_PROVIDER,不考虑NETWORK_PROVIDER）：
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);问题是，测试时（真实设备非虚拟设备），似乎永远无法触发locationListener的onStatusChanged方法，请教高手，何时能触发这个方法，再就解释一下方法中的各个状态，多谢！！！

Answer 1

请确保两个问题：
 1：你在项目清单文件中是否添加了相应的权限
 2：在室内是永远获取到GPS的，请把真实设备放到室外测试

Answer 2

没有位置变化可能不会触发LocationChange方法.

Answer 3

我测了network可以触发，gps测的时候后台一直在不停的找，但没有触发，难道是哪个哥们说的要放在室外？