IP定位的实现

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{  
    address: "CN|北京|北京|None|CHINANET|1|None",    #详细地址信息  
    content:    #结构信息  
    {  
        address: "北京市",    #简要地址信息  
        address_detail:    #结构化地址信息  
        {  
            city: "北京市",    #城市  
            city_code: 131,    #百度城市代码  
            province: "北京市",    #省份      
        },  
        point:    #当前城市中心点  
        {  
            x: "116.39564504",    #当前城市中心点经度
            y: "39.92998578"    #当前城市中心点纬度
        }  
    },  
    status: 0    #结果状态返回码  
}

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 private Thread located_dataget = new Thread() {
    @Override
    public void run() {
        link = "https://api.map.baidu.com/location/ip?ak=自己的ak&ip="+dev_ip+"&coor=bd09ll";
        located_result = GData.requestGet(link);
        handler_located.postDelayed(located_datashow,1000);
    }
};

private Runnable located_datashow = new Runnable() {
    @Override
    public void run() {
        if(located_result!=null){
           //解析返回的json数据
        }
    }
};

private Runnable start = new Runnable() {
    @Override
    public void run() {
        located_dataget.start();
    }
};

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try{        
    JSONObject jsonObject1 = new JSONObject(located_result);
    String data1 = jsonObject1.getString("content");
    JSONObject jsonObject2 = new JSONObject(data1);
    String data2 = jsonObject2.getString("point");
    JSONObject jsonObject3 = new JSONObject(data2);
    latitude = jsonObject3.getString("y");
    longitude = jsonObject3.getString("x");
    }catch (Exception e){
        e.printStackTrace();
    }

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public class Device_location_ip extends AppCompatActivity {

    private boolean isFirstLocate=true;

    private MapView mapView;

    private BaiduMap baiduMap;

    String link,result;

    private Handler handler = new Handler();

    private String latitude,longitude;

    @Override
    protected void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);

        //隐藏手机顶部状态栏
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);

        SDKInitializer.initialize(getApplicationContext());

        setContentView(R.layout.device_location_ip);

        Intent intent = getIntent();
        latitude = intent.getStringExtra("latitude");
        longitude = intent.getStringExtra("longitude");

        //获取控件MapView,先显示百度地图
        mapView = (MapView) findViewById(R.id.mapview);
        baiduMap = mapView.getMap();

        //允许在地图上显示我的位置
        baiduMap.setMyLocationEnabled(true);

        navigateTo(Double.parseDouble(latitude),Double.parseDouble(longitude));

        handler.post(start);、
    }

    //对传入的经纬度参数进行处理，并在地图上显示出来
    private void navigateTo(double laititude,double longitude) {
        if (isFirstLocate) {
            //Toast.makeText(this, "nav to " + location.getAddrStr(), Toast.LENGTH_SHORT).show();
            LatLng ll = new LatLng(laititude, longitude);
            MapStatusUpdate update = MapStatusUpdateFactory.newLatLng(ll);
            baiduMap.animateMapStatus(update);
            update = MapStatusUpdateFactory.zoomTo(16f);
            baiduMap.animateMapStatus(update);
            isFirstLocate = false;
        }

        //在地图上显示我的位置
        MyLocationData.Builder locationBuilder = new MyLocationData.Builder();
        locationBuilder.latitude(laititude);
        locationBuilder.longitude(longitude);
        MyLocationData locationData = locationBuilder.build();
        baiduMap.setMyLocationData(locationData);
    }

    @Override
    protected void onResume() {
        super.onResume();
        mapView.onResume();
    }

    @Override
    protected void onPause() {
        super.onPause();
        mapView.onPause();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        mapView.onDestroy();
        baiduMap.setMyLocationEnabled(false);
    }

    private Thread dataget = new Thread() {

        @Override
        public void run() {
            link = "http://api.map.baidu.com/reverse_geocoding/v3/?ak=your's ak&output=json&coordtype=wgs84ll&location=latitude,longitude";
            result = GData.requestGet(link);
            handler.postDelayed(datashow,1000);
        }
    };

    private Runnable datashow = new Runnable() {
        @Override
        public void run() {

            if(result!=null){
                Log.d("link",link);
                Log.d("result:", result);
                try{
                    JSONObject jsonObject1 = new JSONObject(result);
                    String data1 = jsonObject1.getString("result");
                    JSONObject jsonObject2 = new JSONObject(data1);
                }catch (Exception e){
                    e.printStackTrace();
                }

            }
        }
    };
    private Runnable start = new Runnable() {
        @Override
        public void run() {
            dataget.start();
        }
    };
}