Android笔记之使用LocationManager获取经纬度

LocationManager.getLastKnownLocation(String provider)有可能返回null，概率还挺高

        findViewById(R.id.llMain).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                AndPermission.with(MainActivity.this).runtime().permission(Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_FINE_LOCATION)
                        .onGranted(new Action<List<String>>() {
                            @Override
                            public void onAction(List<String> data) {
                                boolean fineLocationPermissionGranted = PermissionChecker.checkSelfPermission(MainActivity.this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED;
                                boolean coarseLocationPermissionGranted = PermissionChecker.checkSelfPermission(MainActivity.this, Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED;
                                if (fineLocationPermissionGranted && coarseLocationPermissionGranted) {
                                    LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
                                    Location location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
                                    if (location == null) {
                                        new AlertDialog.Builder(MainActivity.this).setMessage("无法获取位置").show();
                                    } else {
                                        double longitude = location.getLongitude();
                                        double latitude = location.getLatitude();
                                        Log.d(TAG, longitude + ", " + latitude);
                                        new AlertDialog.Builder(MainActivity.this).setMessage("经度：" + longitude + "\n纬度：" + latitude).show();
                                    }
                                }
                            }
                        })
                        .onDenied(new Action<List<String>>() {
                            @Override
                            public void onAction(List<String> data) {
                                new AlertDialog.Builder(MainActivity.this).setMessage("位置权限被拒绝").show();
                            }
                        }).start();
            }
        });

以下是通过requestSingleUpdate获取经纬度，不过，LocationManager.requestSingleUpdate是异步的，获取到Location的时间不好控制，如果对经纬度的要求不是必须的，还是建议使用第一种

        findViewById(R.id.btnGetLongitudeAndLatitude).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                AndPermission.with(MainActivity.this).runtime().permission(Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_FINE_LOCATION)
                        .onGranted(new Action<List<String>>() {
                            @Override
                            public void onAction(List<String> data) {
                                boolean fineLocationPermissionGranted = PermissionChecker.checkSelfPermission(MainActivity.this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED;
                                boolean coarseLocationPermissionGranted = PermissionChecker.checkSelfPermission(MainActivity.this, Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED;
                                if (fineLocationPermissionGranted && coarseLocationPermissionGranted) {
                                    LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
                                    locationManager.requestSingleUpdate(LocationManager.NETWORK_PROVIDER, new LocationListener() {
                                        @Override
                                        public void onLocationChanged(Location location) {
                                            double longitude = location.getLongitude();
                                            double latitude = location.getLatitude();
                                            Log.d(TAG, longitude + ", " + latitude);
                                            new AlertDialog.Builder(MainActivity.this).setMessage("经度：" + longitude + "\n纬度：" + latitude).show();
                                        }

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

                                        }

                                        @Override
                                        public void onProviderEnabled(String provider) {

                                        }

                                        @Override
                                        public void onProviderDisabled(String provider) {

                                        }
                                    }, null);
                                } else {
                                    new AlertDialog.Builder(MainActivity.this).setMessage("位置权限被拒绝").show();
                                }
                            }
                        })
                        .onDenied(new Action<List<String>>() {
                            @Override
                            public void onAction(List<String> data) {
                                new AlertDialog.Builder(MainActivity.this).setMessage("位置权限被拒绝").show();
                            }
                        }).start();
            }
        });