Android进阶篇-百度地图获取地理信息

public class BMapApiApplication extends Application {
    
    public static BMapApiApplication mDemoApp;
    
    public static float mDensity;
    
    //百度MapAPI的管理类
    public BMapManager mBMapMan = null;
    
    // 授权Key
    // TODO: 请输入您的Key,
    // 申请地址：http://dev.baidu.com/wiki/static/imap/key/
    public String mStrKey = "F9FBF9FAA9BA37C0C6085BD280723A659EC51B20";
    public boolean m_bKeyRight = true;    // 授权Key正确，验证通过
    
    // 常用事件监听，用来处理通常的网络错误，授权验证错误等
    public static class MyGeneralListener implements MKGeneralListener {
        @Override
        public void onGetNetworkState(int iError) {
            Toast.makeText(BMapApiApplication.mDemoApp.getApplicationContext(), "您的网络出错啦！",
                    Toast.LENGTH_LONG).show();
        }

        @Override
        public void onGetPermissionState(int iError) {
            if (iError ==  MKEvent.ERROR_PERMISSION_DENIED) {
                // 授权Key错误：
                Toast.makeText(BMapApiApplication.mDemoApp.getApplicationContext(), 
                        "请在BMapApiDemoApp.java文件输入正确的授权Key！",
                        Toast.LENGTH_LONG).show();
                BMapApiApplication.mDemoApp.m_bKeyRight = false;
            }
        }
        
    }
    
    @Override
    public void onCreate() {
        mDemoApp = this;
        mBMapMan = new BMapManager(this);
        mBMapMan.init(this.mStrKey, new MyGeneralListener());
        
        mDensity = getResources().getDisplayMetrics().density;
        
        super.onCreate();
    }
    
    @Override
    //建议在您app的退出之前调用mapadpi的destroy()函数，避免重复初始化带来的时间消耗
    public void onTerminate() {
        // TODO Auto-generated method stub
        if (mBMapMan != null) {
            mBMapMan.destroy();
            mBMapMan = null;
        }
        super.onTerminate();
    }

}

/** Called when the activity is first created. */
    /** 上下文 */
    private BMapApiApplication mApplication;
    /** 定义搜索服务类 */
    private MKSearch mMKSearch;
    
    /** 记录当前经纬度的MAP*/
    private HashMap<String, Double> mCurLocation = new HashMap<String, Double>();
    //城市名
    private String cityName;
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        mApplication = (BMapApiApplication) this.getApplication();
        if (mApplication.mBMapMan == null) {
            mApplication.mBMapMan = new BMapManager(getApplication());
            mApplication.mBMapMan.init(mApplication.mStrKey,
                    new BMapApiApplication.MyGeneralListener());
        }
        
        /** 初始化MKSearch */
        mMKSearch = new MKSearch();
        mMKSearch.init(mApplication.mBMapMan, new MySearchListener());
    }
    
    @Override
    protected void onStart() {
        // TODO Auto-generated method stub
        super.onStart();
        this.registerLocationListener();
    }

    private void registerLocationListener() {
        mApplication.mBMapMan.getLocationManager().requestLocationUpdates(
                mLocationListener);
        if (mApplication.mBMapMan != null) {
            /** 开启百度地图API */
            mApplication.mBMapMan.start();
        }
    }

    @Override
    protected void onStop() {
        // TODO Auto-generated method stub
        super.onStop();
        this.unRegisterLocationListener();
    }

    private void unRegisterLocationListener() {
        mApplication.mBMapMan.getLocationManager().removeUpdates(
                mLocationListener);
        if (mApplication.mBMapMan != null) {
            /** 终止百度地图API */
            mApplication.mBMapMan.stop();
        }
    }

    @Override
    protected void onDestroy() {
        if (mApplication.mBMapMan != null) {
            /** 程序退出前需调用此方法 */
            mApplication.mBMapMan.destroy();
            mApplication.mBMapMan = null;
        }
        super.onDestroy();
    }

    /** 注册定位事件 */
    private LocationListener mLocationListener = new LocationListener() {

        @Override
        public void onLocationChanged(Location location) {
            // TODO Auto-generated method stub
            if (location != null) {
                try {
                    int longitude = (int) (1000000 * location.getLongitude());
                    int latitude = (int) (1000000 * location.getLatitude());

                    /** 保存当前经纬度 */
                    mCurLocation.put("longitude", location.getLongitude());
                    mCurLocation.put("latitude", location.getLatitude());

                    GeoPoint point = new GeoPoint(latitude, longitude);
                    /** 查询该经纬度值所对应的地址位置信息 */
                    Weather_WelcomeActivity.this.mMKSearch
                            .reverseGeocode(new GeoPoint(latitude, longitude));
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
    };

    /** 内部类实现MKSearchListener接口,用于实现异步搜索服务 */
    private class MySearchListener implements MKSearchListener {
        @Override
        public void onGetAddrResult(MKAddrInfo result, int iError) {
            if( iError != 0 || result == null){
                Toast.makeText(Weather_WelcomeActivity.this, "获取地理信息失败", Toast.LENGTH_LONG).show();
            }else {
                Log.info("json", "result= " + result);
                cityName =result.addressComponents.city;
                Bundle bundle = new Bundle();
                bundle.putString("cityName", cityName.substring(0, cityName.lastIndexOf("市")));
                Intent intent = new Intent(Weather_WelcomeActivity.this,Weather_MainActivity.class);
                intent.putExtras(bundle);
                startActivity(intent);
                Weather_WelcomeActivity.this.finish();
            }
        }

        @Override
        public void onGetDrivingRouteResult(MKDrivingRouteResult result,
                int iError) {
        }

        @Override
        public void onGetPoiResult(MKPoiResult result, int type, int iError) {
        }

        @Override
        public void onGetTransitRouteResult(MKTransitRouteResult result,
                int iError) {
        }

        @Override
        public void onGetWalkingRouteResult(MKWalkingRouteResult result,
                int iError) {
        }
    }

/**
     * 抓取当前的城市信息
     * 
     * @return String 城市名
     */
    public String getCurrentCityName(){
        String city = "";
        TelephonyManager telManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
        GsmCellLocation glc = (GsmCellLocation) telManager.getCellLocation();
        
        if (glc != null){
            int cid = glc.getCid(); // value 基站ID号
            int lac = glc.getLac();// 写入区域代码
            String strOperator = telManager.getNetworkOperator();
            int mcc = Integer.valueOf(strOperator.substring(0, 3));// 写入当前城市代码
            int mnc = Integer.valueOf(strOperator.substring(3, 5));// 写入网络代码
            String getNumber = "";
            getNumber += ("cid:" + cid + "\n");
            getNumber += ("cid:" + lac + "\n");
            getNumber += ("cid:" + mcc + "\n");
            getNumber += ("cid:" + mnc + "\n");
            DefaultHttpClient client = new DefaultHttpClient();
            BasicHttpParams params = new BasicHttpParams();
            HttpConnectionParams.setSoTimeout(params, 20000);
            HttpPost post = new HttpPost("http://www.google.com/loc/json");
            
            try{
                JSONObject jObject = new JSONObject();
                jObject.put("version", "1.1.0");
                jObject.put("host", "maps.google.com");
                jObject.put("request_address", true);
                if (mcc == 460)
                    jObject.put("address_language", "zh_CN");
                else
                    jObject.put("address_language", "en_US");

                JSONArray jArray = new JSONArray();
                JSONObject jData = new JSONObject();
                jData.put("cell_id", cid);
                jData.put("location_area_code", lac);
                jData.put("mobile_country_code", mcc);
                jData.put("mobile_network_code", mnc);
                jArray.put(jData);
                jObject.put("cell_towers", jArray);
                StringEntity se = new StringEntity(jObject.toString());
                post.setEntity(se);

                HttpResponse resp = client.execute(post);
                BufferedReader br = null;
                if (resp.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
                    br = new BufferedReader(new InputStreamReader(resp
                            .getEntity().getContent()));
                    StringBuffer sb = new StringBuffer();

                    String result = br.readLine();
                    while (result != null){
                        sb.append(getNumber);
                        sb.append(result);
                        result = br.readLine();
                    }
                    String s = sb.toString();
                    s = s.substring(s.indexOf("{"));
                    JSONObject jo = new JSONObject(s);
                    JSONObject arr = jo.getJSONObject("location");
                    JSONObject address = arr.getJSONObject("address");
                    city = address.getString("city");
                }
            }
            catch (JSONException e){
                e.printStackTrace();
            }
            catch (UnsupportedEncodingException e){
                e.printStackTrace();
            }
            catch (ClientProtocolException e){
                e.printStackTrace();
            }
            catch (IOException e){
                e.printStackTrace();
            }
            finally{
                post.abort();
                client = null;
            }
        }
        return city;
    }

    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>

。！