Question

我正在制作像优步这样的出租车预订应用用户拖动地图以使用引脚选择他的位置

我抓住那个引脚的LatLng。

这是我的代码：

public void onMapReady(GoogleMap googleMap) {
    mMap = googleMap;
    mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
    mMap.setOnCameraIdleListener(new GoogleMap.OnCameraIdleListener() {
        @Override
        public void onCameraIdle() {
            pinLocation = mMap.getCameraPosition().target;
            setPickupLocationPrefs(pinLocation);
        }
    });

    //Initialize Google Play Services
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        if (ContextCompat.checkSelfPermission(this,
                Manifest.permission.ACCESS_FINE_LOCATION)
                == PackageManager.PERMISSION_GRANTED) {
            buildGoogleApiClient();
            updateLocationUI();
        }
    }
    else {
        buildGoogleApiClient();
        updateLocationUI();
    }
}

如果应用程序在该位置运行，我希望获取该引脚的地址以向我的用户显示（例如优步）。

如何从引脚位置坐标获取该地址？

Answer 1

使用反向地理编码。首先从引脚点获取纬度和经度。更好地在后台线程中处理这个问题。否则会阻止用户界面。

describe

修复UI阻止的解决方案

使用线程和处理程序的完整示例代码，可在不阻止UI的情况下获取public sessionId; constructor(){ var socket = io.connect('http://**.***.***.***:****'); socket.on('connect', function (data) { console.log('user connected'); socket.emit('add user', { userId: uid }); }); socket.on('create channel', function (data) { console.log(data); this.sessionId = data.sessionId; //error this.function(); //error socket.emit('feedback', { received: true }); }); } function(){}答案。

Geocoder调用程序，可以位于Helper类

中

double latitude = location.getLatitude();
double longitude = location.getLongitude();
Geocoder gc = new Geocoder(this, Locale.getDefault());
try {
    List<Address> addresses = gc.getFromLocation(lat, lng, 1);
    StringBuilder sb = new StringBuilder();
    if (addresses.size() > 0) {
        Address address = addresses.get(0);
        for (int i = 0; i < address.getMaxAddressLineIndex(); i++)
            sb.append(address.getAddressLine(i)).append("\n");
            sb.append(address.getLocality()).append("\n");
            sb.append(address.getPostalCode()).append("\n");
            sb.append(address.getCountryName());
    }
    String Address=sb.toString());
}catch(Exception E);

以下是您在用户界面Geocoder中对此地理编码程序的调用：

public static void getAddressFromLocation(
        final Location location, final Context context, final Handler handler) {
    Thread thread = new Thread() {
        @Override public void run() {
            Geocoder geocoder = new Geocoder(context, Locale.getDefault());   
            String result = null;
            try {
                List<Address> list = geocoder.getFromLocation(
                        location.getLatitude(), location.getLongitude(), 1);
                if (list != null && list.size() > 0) {
                    Address address = list.get(0);
                    // sending back first address line and locality
                    result = address.getAddressLine(0) + ", " + address.getLocality();
                }
            } catch (IOException e) {
                Log.e(TAG, "Impossible to connect to Geocoder", e);
            } finally {
                Message msg = Message.obtain();
                msg.setTarget(handler);
                if (result != null) {
                    msg.what = 1;
                    Bundle bundle = new Bundle();
                    bundle.putString("address", result);
                    msg.setData(bundle);
                } else 
                    msg.what = 0;
                msg.sendToTarget();
            }
        }
    };
    thread.start();
}

Activity/Fragment中的处理程序类在您的用户界面中显示结果：

getAddressFromLocation(PinPointLocation, mContext, new GeocoderHandler());

如何使用Google Place API从指定的纬度和经度获取地点地址

1 个答案: