百度地图Android定位SDK在AndroidStudio的使用，动态请求权限，获取具体未知信息，如国家，街道

男娘i 2022-03-20 13:42 202阅读 0赞

1.1、AS的配置请浏览 [百度地图AndroidSDK，注册，到AndroidStudio配置][AndroidSDK_AndroidStudio]

1.2、权限 和 AK 的添加浏览 [百度地图Android Studio 配置][Android Studio]

1.3、如何请求权限以及使用  
效果图：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4MzQwNjAx_size_16_color_FFFFFF_t_70]

public class MainActivity extends AppCompatActivity {
        public LocationClient mLocationClient = null;
        private MyLocationListener myListener = new MyLocationListener();
        @Override
        protected void onCreate(@Nullable Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            mLocationClient = new LocationClient(getApplicationContext());
            mLocationClient.registerLocationListener(myListener);
    //        // 权限请求
            getPermissionMethod();
        }
        // 权限请求
        private void getPermissionMethod() {
            List<String> permissionList = new ArrayList<>();
            
            if(ContextCompat.checkSelfPermission(MainActivity.this,Manifest.permission.ACCESS_FINE_LOCATION)!= PackageManager.PERMISSION_GRANTED){
                permissionList.add(Manifest.permission.ACCESS_FINE_LOCATION);
            }
            
            Log.i(TAG, "getPermissionMethod: permissionListSize:"+permissionList.size());
            if (!permissionList.isEmpty()){ //权限列表不是空
                String[] permissions = permissionList.toArray(new String[permissionList.size()]);
                ActivityCompat.requestPermissions(MainActivity.this,permissions,1);
            }else{
                Log.i(TAG, "getPermissionMethod: requestLocation !permissionList.isEmpty()里");
                requestLocation();
            }
        }
        //开启 start 定位，默认只启动一次，需要自己设置间隔次数
        private void requestLocation() {
            initLocation();//其他请求设置
            mLocationClient.start();  //定位请求开启
        }
    
        private void initLocation() {
            LocationClientOption option = new LocationClientOption();
            option.setIsNeedAddress(true);
            option.setLocationMode(LocationClientOption.LocationMode.Device_Sensors);  // 定位模式是仅限设备模式，也就是仅允许GPS来定位。
            option.setScanSpan(2000);
            mLocationClient.setLocOption(option);
        }
    
    
        @Override
        public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
            switch (requestCode){
                case 1:
                    if(grantResults.length>0){
                        for (int result:grantResults){
                            if (result != PackageManager.PERMISSION_GRANTED){
                                Toast.makeText(this, "必须统一所有权限才能使用本程序", Toast.LENGTH_SHORT).show();
                                finish();
                                return;
                            }
                        }
                       requestLocation();
                    }else
                    {
                        Toast.makeText(this, "发生未知错误", Toast.LENGTH_SHORT).show();
                    }
                    break;
                    default:
            }
        }
    
        private static final String TAG = "MainActivity";
    
        public class MyLocationListener extends BDAbstractLocationListener {
            @Override
            public void onReceiveLocation( BDLocation location){
                //此处的BDLocation为定位结果信息类，通过它的各种get方法可获取定位相关的全部结果
                //以下只列举部分获取地址相关的结果信息
                //更多结果信息获取说明，请参照类参考中BDLocation类中的说明
                Log.d(TAG, "run: 纬度："+location.getLatitude());
                String addr = location.getAddrStr();    //获取详细地址信息
                Log.d(TAG, "onReceiveLocation:详细地址信 "+addr);
                String country = location.getCountry();    //获取国家
                Log.d(TAG, "onReceiveLocation: 国家："+country);
                String province = location.getProvince();    //获取省份
                Log.d(TAG, "onReceiveLocation: 省份："+province);
                String city = location.getCity();    //获取城市
                Log.d(TAG, "onReceiveLocation: 城市："+city);
                String district = location.getDistrict();    //获取区县
                Log.d(TAG, "onReceiveLocation: 区县信息："+district);
                String street = location.getStreet();    //获取街道信息
                 Log.d(TAG, "onReceiveLocation: 街道信息："+street);
    
                if (location.getLocType() == BDLocation.TypeNetWorkLocation)
                    Log.d(TAG, "onReceiveLocation: 定位方式：NET"+location.getLocType());
                else if(location.getLocType() == BDLocation.TypeGpsLocation )
                    Log.d(TAG, "onReceiveLocation: 定位方式：GPS"+location.getLocType());
                else
                    Log.d(TAG, "onReceiveLocation: 定位出错");
            }
    
        }
    
    }

其他请求设置就浏览官网说明。

--------------------

在使用NET定位方式时，如果设置了option.setScanSpan();的间隔，第一次请求可以正确请求，后续请求的数据全是null，具体原因未知。

[AndroidSDK_AndroidStudio]: https://blog.csdn.net/qq_38340601/article/details/87167235
[Android Studio]: http://lbsyun.baidu.com/index.php?title=android-locsdk/guide/create-project/android-studio
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4MzQwNjAx_size_16_color_FFFFFF_t_70]: /images/20220320/b33ff5f5d5fa4323899cdf796ae98b85.png