将新的String值发送到另一个不起作用的类？ （仅第一次工作）

Question

我正在使用Google的FusedLocationAPI和YahooAPI获取我当前的位置（来自fusedlocationAPI）并将其发送到yahooAPI并获取我所在位置的天气。

在onCreate方法中，我从yahooCom.refresh（slocation）方法获取天气。但是，我希望每次调用onlocationUpdates（）方法时都会得到天气。但是当我尝试这样做时，它就不再适应天气了。

基本上，我发送给YahooCom类的Slocation String的第一个值可以工作，但是当我更改变量值并再次发送它时，它不起作用（不更新天气）

如何在位置更新时获取天气更新？我是一个初学的android编码器，所以请原谅我的问题，如果它是愚蠢的。

public class MainActivity extends AppCompatActivity implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, LocationListener, YahooComCallback {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);

    //here I am finding all views by id etc etc...

    googleApiClient = new GoogleApiClient.Builder(this)
            .addApi(LocationServices.API)
            .addConnectionCallbacks(this)
            .addOnConnectionFailedListener(this).build();

    locationRequest = new LocationRequest();
    locationRequest.setInterval(LOCATION_REQUEST_INTERVAL);
    locationRequest.setFastestInterval(LOCATION_REQUEST_FASTEST);
    locationRequest.setPriority(locationRequest.PRIORITY_HIGH_ACCURACY); 

    yahooCom = new YahooCom(this);
    //yahooCom.refresh(slocation); works here the first time
}


@Override
public void onConnected(@Nullable Bundle bundle) {
    requestLocationUpdates();
}

private void requestLocationUpdates() {
    if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
        ActivityCompat.requestPermissions(this,
                new String[]{Manifest.permission.ACCESS_COARSE_LOCATION,Manifest.permission.ACCESS_FINE_LOCATION},
                MY_PERMISSION_REQUEST_READ_FINE_LOCATION);

        return;
    }
    LocationServices.FusedLocationApi.requestLocationUpdates(googleApiClient, locationRequest, this);

}

@Override
public void onLocationChanged(Location location) {
    mLatitude = location.getLatitude();
    mLongitude = location.getLongitude();
    latitudeTextView.setText(String.valueOf(mLatitude));
    longitudeTextView.setText(String.valueOf(mLongitude));
    slocation = ""+Double.toString(mLatitude)+","+Double.toString(mLongitude)+"";
    yahooCom.refresh(slocation);
}

@Override
protected void onStart() {
    super.onStart();
    googleApiClient.connect();
}

@Override
protected void onStop() {
    super.onStop();
    googleApiClient.disconnect();
}

@Override
protected void onResume() {
    super.onResume();
    if(googleApiClient.isConnected())
        requestLocationUpdates();
}

@Override
protected void onPause() {
    super.onPause();
    LocationServices.FusedLocationApi.removeLocationUpdates(googleApiClient,this);
}

@Override
public void serviceSuccess(Channel channel) {

    code.setText("Code: "+Integer.toString(channel.getItem().getCondition().getCode()));
    city.setText(channel.getLocation().getCity());
    temperature.setText(Integer.toString(channel.getItem().getCondition().getTemperature())+" \u00B0 C");
    condition.setText(channel.getItem().getCondition().getDescription());

}

}

修改

以下是来自YahooCom类的refresh（）方法的代码：

public void refresh(final String location){
    new AsyncTask<String, Void, String>() {
        @Override
        protected String doInBackground(String... params) {
            yql = String.format("select * from weather.forecast where woeid in (select woeid from geo.places(1) where text=\"%s\") and u=\"C\"", slocation);
            endPoint = String.format("https://query.yahooapis.com/v1/public/yql?q=%s&format=json", Uri.encode(yql));

            try {

                URL url = new URL(endPoint);
                URLConnection urlConnection = url.openConnection();
                InputStream inputStream = urlConnection.getInputStream();
                BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));

                StringBuilder result = new StringBuilder();
                String line;
                while((line = bufferedReader.readLine()) != null){
                    result.append(line);
                }
                return result.toString();

            } catch (Exception e) {
                exception = e;
            }

            return null;
        }

        @Override
        protected void onPostExecute(String s) {

            if(s == null && exception != null){
                yahooComCallback.serviceFailure(exception);
                return;
            }
            try {
                JSONObject data = new JSONObject(s);

                JSONObject query = data.optJSONObject("query");
                int count = query.optInt("count");
                if(count == 0){
                    yahooComCallback.serviceFailure(new LocationException("Location does not exist, or no weather information was found for this location"));
                    return;
                }

                Channel channel = new Channel();
                channel.populate(query.optJSONObject("results").optJSONObject("channel"));
                yahooComCallback.serviceSuccess(channel);
            } catch (JSONException e) {
                yahooComCallback.serviceFailure(e);
            }

        }
    }.execute(location);

}