聚合資料經緯度解析

介面地址：http://apis.juhe.cn/geo/
支援格式：JSON/XML
請求方式：GET
請求示例：http://apis.juhe.cn/geo/?key=您申請的APPKEY&lat=39.907314&lng=116.391279&type=1
介面備註：實現GPS/百度經緯度/谷歌經緯度 解析成地理位置資訊
請求引數：
名稱 型別 必填 說明
lng String Y 經度 (如：119.9772857)
lat String Y 緯度 (如：27.327578)
key String Y 申請的APPKEY
type Int Y 傳遞的座標型別,1:GPS 2:百度經緯度 3：谷歌經緯度
dtype String N 返回資料格式：json或xml,預設json
JSON返回示例：
{
“resultcode”:”200”,
“reason”:”Successed!”,
“result”:{
“lat”:”39.915065193348”,
“lng”:”116.40389843345”,
“type”:”1”,
“address”:”北京市東城區中華路甲10號”,
“business”:”天安門”,
“citycode”:131
}
}

由介面文件可知，只要我們獲取當前經緯度併發送到聚合資料介面，可解析返回的JSON資料得到當前地址，程式碼如下：

public class MainActivity extends Activity {

    private TextView positionTextView;//顯示地址
    private LocationManager locationmanager;//位置管理器
    private String provider;//GPS或Network提供
    private static final int SHOW_LOCATION=0;

    protected
 
 void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        CommonFun.initialize(getApplicationContext());
        setContentView(R.layout.activity_main);

        positionTextView = (TextView) findViewById(R.id.position_text_view);
        locationmanager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
        //獲取當前可用GPS或Network
 

        List<String> providerList = locationmanager.getProviders(true);
        if(providerList.contains(LocationManager.GPS_PROVIDER)){
            provider = LocationManager.GPS_PROVIDER;
        }
        else if(providerList.contains(LocationManager.NETWORK_PROVIDER)){
            provider = LocationManager.NETWORK_PROVIDER;
        }
        else{
            Toast.makeText(this, "No location provider to use", Toast.LENGTH_SHORT).show();
            return;
        }
        //得到地址例項
        Location location = locationmanager.getLastKnownLocation(provider);
        if(location!=null){
            showLocation(location);//呼叫顯示地址方法
        }
        locationmanager.requestLocationUpdates(provider, 5000, 10, locationListener);
    }

@Override
protected void onDestroy() {
    // TODO Auto-generated method stub
    super.onDestroy();
    if(locationmanager!=null){
        locationmanager.removeUpdates(locationListener);
    }
}
LocationListener locationListener = new LocationListener() {

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onProviderEnabled(String provider) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onProviderDisabled(String provider) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onLocationChanged(Location location) {
        // TODO Auto-generated method stub
        showLocation(location);

    }
};
private void showLocation(final Location location){
    new Thread(new Runnable() {
        public void run() {
        // TODO Auto-generated method stub
        try{
            StringBuilder url = new StringBuilder();
            url.append("http://apis.juhe.cn/geo/?key=af0de3a4a0c37181a285d1606869b59d&lat=");
    //key值為聚合資料上申請的開發者key
                    url.append(location.getLatitude()).append("&lng=");                 url.append(location.getLongitude()).append("&type=1");
url.append("&sensor=false");

HttpClient httpClient = new DefaultHttpClient();
HttpGet httpGet = new HttpGet(url.toString());
HttpResponse httpResponse = httpClient.execute(httpGet);
//利用get方法傳送url得到JSON資料
if(httpResponse.getStatusLine().getStatusCode()==200){
//得到JSON資料
    HttpEntity entity = httpResponse.getEntity();
    String response = EntityUtils.toString(entity, "utf-8");
    //根據JSON資料格式進行解析                    
    JSONObject jsonObject = new JSONObject(response);
    JSONObject result = jsonObject.getJSONObject("result");
    String position= result.getString("address");
    //子執行緒中不能設定TextView屬性，非同步資訊處理             
    Message message = new Message();
    message.what = SHOW_LOCATION;
    message.obj = position;
    handler.sendMessage(message);

    }
    }catch(Exception e){
    e.printStackTrace();
    }

    }
}).start();

}
    private Handler handler = new Handler(){

        public void handleMessage(Message msg) {

            super.handleMessage(msg);
            switch (msg.what) {
            case SHOW_LOCATION:
            String currentPosition =(String) msg.obj;
            positionTextView.setText(currentPosition);
                    break;

                default:
                    break;
                }
            }

        };

}