我正在Android中搜索附近的地方,例如银行,餐馆,ATM机在google地图上绘制的区域

概述我正在 Android中搜索附近的地方,例如银行,餐馆,ATM机在google地图上绘制的区域.我在数组中获得坐标(纬度和经度),但是我无法通过该数组找到附近的地点. 有人可以帮我吗我试图搜索,但没有发现结果. 伟大的帮助将不胜感激！ 这是我绘制的区号： public class MainActivity extends FragmentActivity implements OnTouchLis 我正在 Android中搜索附近的地方,例如银行,餐馆,ATM机在Google地图上绘制的区域.我在数组中获得坐标(纬度和经度),但是我无法通过该数组找到附近的地点.
有人可以帮我吗我试图搜索,但没有发现结果.
伟大的帮助将不胜感激！

这是我绘制的区号：

public class MainActivity extends FragmentActivity implements OntouchListener {    private static final String TAG = "polygon";    private GoogleMap mGoogleMap;    private VIEw mMapShelterVIEw;    private GestureDetector mGestureDetector;    private ArrayList<LatLng> mLatlngs = new ArrayList<LatLng>();    private polylineoptions mpolylineoptions;    private polygonoptions mpolygonoptions;    // flag to differentiate whether user is touching to draw or not    private boolean mDrawFinished = false;    @OverrIDe    protected voID onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentVIEw(R.layout.activity_main);        mMapShelterVIEw = (VIEw) findVIEwByID(R.ID.drawer_vIEw);        mGestureDetector = new GestureDetector(this,new GestureListener());        mMapShelterVIEw.setontouchListener(this);        initilizeMap();        //Contains(null);    }    private final class GestureListener extends SimpleOnGestureListener {        @OverrIDe        public boolean onDown(MotionEvent e) {            return true;        }        @OverrIDe        public boolean onFling(MotionEvent e1,MotionEvent e2,float veLocityX,float veLocityY) {            return false;        }    }    /**     * Ontouch event will draw poly line along the touch points     *      */    @OverrIDe    public boolean ontouch(VIEw v,MotionEvent event) {        int X1 = (int) event.getX();        int Y1 = (int) event.getY();        Point point = new Point();        point.x = X1;        point.y = Y1;        LatLng firstGeoPoint = mGoogleMap.getProjection().fromScreenLocation(                point);        switch (event.getAction()) {        case MotionEvent.ACTION_DOWN:            break;        case MotionEvent.ACTION_MOVE:            if (mDrawFinished) {                X1 = (int) event.getX();                Y1 = (int) event.getY();                point = new Point();                point.x = X1;                point.y = Y1;                LatLng geoPoint = mGoogleMap.getProjection()                        .fromScreenLocation(point);                mLatlngs.add(geoPoint);                mpolylineoptions = new polylineoptions();                mpolylineoptions.color(color.RED);                mpolylineoptions.wIDth(3);                mpolylineoptions.addAll(mLatlngs);                mGoogleMap.addpolyline(mpolylineoptions);                **Log.d(TAG,"Latitude and longitude: " + mLatlngs);**            }            break;        case MotionEvent.ACTION_UP:            Log.d(TAG,"Poinnts array size " + mLatlngs.size());            mLatlngs.add(firstGeoPoint);            mGoogleMap.clear();            mpolylineoptions = null;            mMapShelterVIEw.setVisibility(VIEw.GONE);            mGoogleMap.getUiSettings().setZoomGesturesEnabled(true);            mGoogleMap.getUiSettings().setAllGesturesEnabled(true);            mpolygonoptions = new polygonoptions();            mpolygonoptions.fillcolor(0x5500ff00);           // mpolygonoptions.fillcolor(color.LTGRAY);            mpolygonoptions.strokecolor(color.RED);            mpolygonoptions.strokeWIDth(5);            mpolygonoptions.addAll(mLatlngs);            mGoogleMap.addpolygon(mpolygonoptions);            mDrawFinished = false;            break;        }        return mGestureDetector.ontouchEvent(event);    }    /**     * Setting up map     *      */    private voID initilizeMap() {        int status = GooglePlayServicesUtil                .isGooglePlayServicesAvailable(getApplicationContext());        if (status == ConnectionResult.SUCCESS) {            if (mGoogleMap == null) {                mGoogleMap = ((SupportMapFragment) getSupportFragmentManager()                        .findFragmentByID(R.ID.map)).getMap();                mGoogleMap.setMyLocationEnabled(true);            }        } else if (GooglePlayServicesUtil.isUserRecoverableError(status)) {            // showErrorDialog(status);        } else {            Toast.makeText(this,"No Support for Google Play Service",Toast.LENGTH_LONG).show();        }    }    /**     * Method gets called on tap of draw button,It prepares the screen to draw     * the polygon     *      * @param vIEw     */    public voID drawZone(VIEw vIEw) {        mGoogleMap.clear();        mLatlngs.clear();        mpolylineoptions = null;        mpolygonoptions = null;        mDrawFinished = true;        mMapShelterVIEw.setVisibility(VIEw.VISIBLE);        mGoogleMap.getUiSettings().setScrollGesturesEnabled(false);    }    public synchronized boolean Contains(Location location) {        boolean isInsIDe = false;        if (mLatlngs.size() > 0) {            LatLng lastPoint = mLatlngs.get(mLatlngs.size() - 1);            double x = location.getLongitude();            for (LatLng point : mLatlngs) {                double x1 = lastPoint.longitude;                double x2 = point.longitude;                double dx = x2 - x1;                if (Math.abs(dx) > 180.0) {                    if (x > 0) {                        while (x1 < 0)                            x1 += 360;                        while (x2 < 0)                            x2 += 360;                    } else {                        while (x1 > 0)                            x1 -= 360;                        while (x2 > 0)                            x2 -= 360;                    }                    dx = x2 - x1;                }                if ((x1 <= x && x2 > x) || (x1 >= x && x2 < x)) {                    double grad = (point.latitude - lastPoint.latitude) / dx;                    double intersectAtLat = lastPoint.latitude                            + ((x - x1) * grad);                    if (intersectAtLat > location.getLatitude())                        isInsIDe = !isInsIDe;                }                lastPoint = point;            }        }        return isInsIDe;    }

我在mLatlang上有数组,现在我想靠近那个坐标不在当前位置的地方

解决方法 以下是使用Places Web Service API的一些工作代码,这应该可以帮助您获得所需的功能.

一般文件可以找到here.

可以找到所有类型的地方类型here.

以下是一个简单的例子.首先,生成API的查询字符串：

public StringBuilder sbMethod() {    //use your current location here    double mLatitude = 37.77657;    double mLongitude = -122.417506;    StringBuilder sb = new StringBuilder("https://maps.GoogleAPIs.com/maps/API/place/nearbysearch/Json?");    sb.append("location=" + mLatitude + "," + mLongitude);    sb.append("&radius=5000");    sb.append("&types=" + "restaurant");    sb.append("&sensor=true");    sb.append("&key=******* YOUR API KEY****************");    Log.d("Map","API: " + sb.toString());    return sb;}

以下是用于查询Places API的AsyncTask：

private class PlacesTask extends AsyncTask<String,Integer,String> {    String data = null;    // Invoked by execute() method of this object    @OverrIDe    protected String doInBackground(String... url) {        try {            data = downloadUrl(url[0]);        } catch (Exception e) {            Log.d("Background Task",e.toString());        }        return data;    }    // Executed after the complete execution of doInBackground() method    @OverrIDe    protected voID onPostExecute(String result) {        ParserTask parserTask = new ParserTask();        // Start parsing the Google places in JsON format        // Invokes the "doInBackground()" method of the class ParserTask        parserTask.execute(result);    }}

这是downloadURL()方法：

private String downloadUrl(String strUrl) throws IOException {    String data = "";    inputStream iStream = null;    httpURLConnection urlConnection = null;    try {        URL url = new URL(strUrl);        // Creating an http connection to communicate with url        urlConnection = (httpURLConnection) url.openConnection();        // Connecting to url        urlConnection.connect();        // Reading data from url        iStream = urlConnection.getinputStream();        BufferedReader br = new BufferedReader(new inputStreamReader(iStream));        StringBuffer sb = new StringBuffer();        String line = "";        while ((line = br.readline()) != null) {            sb.append(line);        }        data = sb.toString();        br.close();    } catch (Exception e) {        Log.d("Exception while downloading url",e.toString());    } finally {        iStream.close();        urlConnection.disconnect();    }    return data;}

用于解析JsON结果的ParserTask：

private class ParserTask extends AsyncTask<String,List<HashMap<String,String>>> {    JsONObject jObject;    // Invoked by execute() method of this object    @OverrIDe    protected List<HashMap<String,String>> doInBackground(String... JsonData) {        List<HashMap<String,String>> places = null;        Place_JsON placeJson = new Place_JsON();        try {            jObject = new JsONObject(JsonData[0]);            places = placeJson.parse(jObject);        } catch (Exception e) {            Log.d("Exception",e.toString());        }        return places;    }    // Executed after the complete execution of doInBackground() method    @OverrIDe    protected voID onPostExecute(List<HashMap<String,String>> List) {        Log.d("Map","List size: " + List.size());        // Clears all the existing markers;        mGoogleMap.clear();        for (int i = 0; i < List.size(); i++) {            // Creating a marker            MarkerOptions markerOptions = new MarkerOptions();            // Getting a place from the places List            HashMap<String,String> hmPlace = List.get(i);            // Getting latitude of the place            double lat = Double.parseDouble(hmPlace.get("lat"));            // Getting longitude of the place            double lng = Double.parseDouble(hmPlace.get("lng"));            // Getting name            String name = hmPlace.get("place_name");            Log.d("Map","place: " + name);            // Getting vicinity            String vicinity = hmPlace.get("vicinity");            LatLng latLng = new LatLng(lat,lng);            // Setting the position for the marker            markerOptions.position(latLng);            markerOptions.Title(name + " : " + vicinity);            markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_magenta));            // Placing a marker on the touched position            Marker m = mGoogleMap.addMarker(markerOptions);        }    }}

ParserTask中使用的Place_JsON类：

public class Place_JsON {    /**     * Receives a JsONObject and returns a List     */    public List<HashMap<String,String>> parse(JsONObject jObject) {        JsONArray jplaces = null;        try {            /** RetrIEves all the elements in the 'places' array */            jplaces = jObject.getJsONArray("results");        } catch (JsONException e) {            e.printstacktrace();        }        /** Invoking getPlaces with the array of Json object         * where each Json object represent a place         */        return getPlaces(jplaces);    }    private List<HashMap<String,String>> getPlaces(JsONArray jplaces) {        int placesCount = jplaces.length();        List<HashMap<String,String>> placesList = new ArrayList<HashMap<String,String>>();        HashMap<String,String> place = null;        /** Taking each place,parses and adds to List object */        for (int i = 0; i < placesCount; i++) {            try {                /** Call getPlace with place JsON object to parse the place */                place = getPlace((JsONObject) jplaces.get(i));                placesList.add(place);            } catch (JsONException e) {                e.printstacktrace();            }        }        return placesList;    }    /**     * Parsing the Place JsON object     */    private HashMap<String,String> getPlace(JsONObject jplace) {        HashMap<String,String> place = new HashMap<String,String>();        String placename = "-NA-";        String vicinity = "-NA-";        String latitude = "";        String longitude = "";        String reference = "";        try {            // Extracting Place name,if available            if (!jplace.isNull("name")) {                placename = jplace.getString("name");            }            // Extracting Place vicinity,if available            if (!jplace.isNull("vicinity")) {                vicinity = jplace.getString("vicinity");            }            latitude = jplace.getJsONObject("geometry").getJsONObject("location").getString("lat");            longitude = jplace.getJsONObject("geometry").getJsONObject("location").getString("lng");            reference = jplace.getString("reference");            place.put("place_name",placename);            place.put("vicinity",vicinity);            place.put("lat",latitude);            place.put("lng",longitude);            place.put("reference",reference);        } catch (JsONException e) {            e.printstacktrace();        }        return place;    }}

最后,调用这个过程：

StringBuilder sbValue = new StringBuilder(sbMethod());    PlacesTask placesTask = new PlacesTask();    placesTask.execute(sbValue.toString());

结果：

总结

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