Question

我正在尝试使用Forecast API开发应用。但是这个api只允许通过纬度和经度从一个城市获取数据。这是我的代码

final double latitude=21.0260;
final double longtitude=105.8471;
String forecastUrl="https://api.forecast.io/forecast/"+apiKey+"/"+latitude+","+longtitude;

。此代码将仅从河内市返回数据。如何只使用这个latidude和longtitude从2个或更多城市获取数据？这是我的被调用的函数，但我不知道如何更改循环，因为我调用了GetForecast（）函数：

    final double[] latitudes={21.0260,12.0260,21.1260};
    final double[] longtitudes={23.0260,42.0260,51.1260};

    mRefreshImageView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            getForecast(latitudes,longtitudes);
        }
    });
    getForecast(latitudes,longtitudes);
Log.d(TAG, "MainUI code is running");
}

private void getForecast(double[] latitude,double[] longtitude) {
    String apiKey="a424ddd79338808311d0a6197a12731e";
    String forecastUrl="https://api.forecast.io/forecast/"+apiKey+"/"+latitude+","+longtitude;

    if (isNetWorkAvailable()) {
        toogleRefresh();
        OkHttpClient client = new OkHttpClient();
        Request req = new Request.Builder()
                .url(forecastUrl)
                .build();
        Call call = client.newCall(req);
        call.enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        toogleRefresh();
                    }
                });  alertUser();
            }
            @Override
            public void onResponse(Call call, Response response) throws IOException {
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        toogleRefresh();
                    }
                });
                try {
                    String jsonData=response.body().string();
                    Log.v(TAG, jsonData);
                    if (response.isSuccessful()) {
                        mCurrentWeather=getCurrentDetail(jsonData);
                        runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                updateDisplay();
                            }
                        });

                    } else {
                        alertUser();
                    }
                } catch (IOException e) {
                    Log.e(TAG, "Exception  caught:", e);
                }catch (JSONException e){
                    Log.e(TAG, "Exception  caught:", e);
                }
            }
        });
    }else {
        Toast.makeText(this, R.string.error_network_unavailable,Toast.LENGTH_LONG).show();
    }
}

updateDetail：

private void updateDisplay() {
    mTemperatureLabel.setText(mCurrentWeather.getTemperature() + "");
    mHumidityValue.setText(mCurrentWeather.getHumidity() + "");
    mTimeLabel.setText( "At "+ mCurrentWeather.getFormattedTime()+" it will be");
    mPrecipeValue.setText(mCurrentWeather.getPrecipChance()+"");
    mSummaryValue.setText(mCurrentWeather.getSumary());
    Drawable drawable=getResources().getDrawable(mCurrentWeather.getIconId());
    mIconImageView.setImageDrawable(drawable);
}

getCurrentDetails（）：

private CurrentWeather getCurrentDetail(String jsonData) throws JSONException{
    JSONObject forecast= new JSONObject(jsonData);
    String timeZone=forecast.getString("timezone");
    Log.i(TAG,"From Json" + timeZone);
    JSONObject currently=forecast.getJSONObject("currently");
    CurrentWeather currentWeather= new CurrentWeather();
    currentWeather.setHumidity(currently.getDouble("humidity"));
    currentWeather.setTime(currently.getLong("time"));
    currentWeather.setIcon(currently.getString("icon"));
    currentWeather.setPrecipChance(currently.getDouble("precipProbability"));
    currentWeather.setSumary(currently.getString("summary"));
    currentWeather.setTemperature(currently.getDouble("temperature"))   ;
    currentWeather.setTimeZone(timeZone);
    Log.d(TAG,currentWeather.getFormattedTime());
    return currentWeather;
}

Answer 1

制作纬度和经度阵列，然后使用for循环获取url。

例如： -

final double[] latitudes={21.0260,12.0260,21.1260};
final double[] longitudes={23.0260,42.0260,51.1260};

String[] forecastUrls;

for(int i;i<latitudes.lenght;i++){

   forecastUrls[i] = "https://api.forecast.io/forecast/"+apiKey+"/"+latitudes[i]+","+longtitude[i];
}

已更新： -

 mRefreshImageView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            for(int i;i<latitudes.length;i++){
              getForecast(latitudes[i],longtitudes[i]);
            }
        }
    });

使用Forecast API获取许多城市

1 个答案: