weex☞获取经纬度

获取通讯录、扫码、打开相册、拍照等操作，都是一个套路，就是创建module，原生实现这些方法，前端调用是时候返回最终的结果。
下面是如何获取经纬度坐标。(原生获取部分参考网上代码，有价值的只是返回数据)

public class GetLocation extends WXModule {
    protected JSCallback callback;

    private LocationManager locationManager;
    private String locationProvider;
    public final static int LOCAL_REQUEST_CODE = 0;

    @JSMethod(uiThread = true)
    public void getLocal(JSCallback callback) {
        this.callback = callback;
        locationManager = (LocationManager) mWXSDKInstance.getContext().getSystemService(mWXSDKInstance.getContext().LOCATION_SERVICE);
        //下面注释的代码获取的location为null，所以采用Criteria的方式。

        Criteria criteria = new Criteria();
        criteria.setAccuracy(Criteria.ACCURACY_COARSE);//低精度，如果设置为高精度，依然获取不了location。
        criteria.setAltitudeRequired(false);//不要求海拔
        criteria.setBearingRequired(false);//不要求方位
        criteria.setCostAllowed(true);//允许有花费
        criteria.setPowerRequirement(Criteria.POWER_LOW);//低功耗

        //从可用的位置提供器中，匹配以上标准的最佳提供器
        locationProvider = locationManager.getBestProvider(criteria, true);
        if (ActivityCompat.checkSelfPermission(mWXSDKInstance.getContext(), Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(mWXSDKInstance.getContext(),
                Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            Log.d("tag-local", " 没有权限 就获取权限");
            ActivityCompat.requestPermissions((WXPageActivity) mWXSDKInstance.getContext(),
                    new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
                    LOCAL_REQUEST_CODE);
        }
        Location location = locationManager.getLastKnownLocation(locationProvider);
        if (location != null) {
            //不为空,显示地理位置经纬度
            showLocation(callback, location);
        }
        //监视地理位置变化
        locationManager.requestLocationUpdates(locationProvider, 0, 0, locationListener);
    }

    @JSMethod(uiThread = false)
    public void removeLocalListener(JSCallback callback) {
        locationManager.removeUpdates(locationListener);
        callback.invoke("success");
    }

    /**
     * LocationListern监听器
     * 参数：地理位置提供器、监听位置变化的时间间隔、位置变化的距离间隔、LocationListener监听器
     */
    LocationListener locationListener = new LocationListener() {
        @Override
        public void onStatusChanged(String provider, int status, Bundle arg2) {
        }
        @Override
        public void onProviderEnabled(String provider) {
            Log.d("tag-local", "onProviderEnabled: " + provider + ".." + Thread.currentThread().getName());
        }
        @Override
        public void onProviderDisabled(String provider) {
            Log.d("tag-local", "onProviderDisabled: " + provider + ".." + Thread.currentThread().getName());
        }
        @Override
        public void onLocationChanged(Location location) {
            Log.d("tag-local", "onLocationChanged: " + ".." + Thread.currentThread().getName());
            //如果位置发生变化,重新显示
            showLocation(callback, location);
        }
    };
    private void showLocation(JSCallback callback, Location location) {
        Log.d("tag-local", "定位成功------>经度为：" + location.getLatitude() + "\n纬度为" + location.getLongitude());
        Map data2 = new HashMap();
        data2.put("result", true);
        data2.put("Latitude", location.getLatitude());
        data2.put("Longitude", location.getLongitude());
        callback.invoke(data2);
    }
}

配置相应的权限，在WXApplication中加入

   WXSDKEngine.registerModule("getLocation", GetLocation.class);

然后就是前端调用

const getLocation= weex.requireModule('getLocation')
...         //在方法中直接使用就行了
            getLocation.getLocal(res => {
                   ...
                })
           //获取到数据后可以取消监听
           getLocation.removeLocalListener(res => {
                   ...
                })