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Android

Mirosław Mitura
Mirosław Mitura
3,294 Points

FATAL EXCEPTION: OkHttp Dispatcher

Hi! I've got this issue with FATAL EXCEPTION: OkHttp Dispatcher and null object reference ... Everything was fine until constructor CurrentWeather appeared ...

Thank's in advance for any help .

LOGCAT : 07-10 21:50:48.877 4625-4687/miroslaw.mitura.strormy E/AndroidRuntime: FATAL EXCEPTION: OkHttp Dispatcher Process: miroslaw.mitura.strormy, PID: 4625 java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String miroslaw.mitura.strormy.CurrentWeather.getLocationLabel()' on a null object reference at miroslaw.mitura.strormy.MainActivity$1.onResponse(MainActivity.java:74) at okhttp3.RealCall$AsyncCall.run(RealCall.kt:138) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588) at java.lang.Thread.run(Thread.java:818)

public class MainActivity extends AppCompatActivity {

public static final String TAG = MainActivity.class.getSimpleName();

private CurrentWeather currentWeather;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    ActivityMainBinding binding = DataBindingUtil.setContentView(MainActivity.this,
            R.layout.activity_main);

    String apiKey = "xxx";
    double latitude = 54.6052800;
    double longitude = 18.3471700;
    String forecastURL = "https://weatherbit-v1-mashape.p.rapidapi.com/current?lat="+ latitude+"&lon="+longitude;

    if(isNetworkAvailable()) {
        OkHttpClient client = new OkHttpClient();

        Request request = new Request.Builder()
                .url(forecastURL)
                .get()
                .addHeader("x-rapidapi-key", apiKey)
                .addHeader("x-rapidapi-host", "weatherbit-v1-mashape.p.rapidapi.com")
                .build();


        Call call = client.newCall(request);
        call.enqueue(new Callback() {
            @Override
            public void onFailure(@NotNull Call call, @NotNull IOException e) {

            }


            @Override
            public void onResponse(@NotNull Call call, @NotNull Response response) throws IOException {
                try {
                    String jsonData = response.body().string();

                    if (response.isSuccessful()) {

                        currentWeather = getCurrentDetails(jsonData);

                        CurrentWeather displayWeather = new CurrentWeather(
                                currentWeather.getLocationLabel(),
                                currentWeather.getIcon(),
                                currentWeather.getTime(),
                                currentWeather.getTemperature(),
                                currentWeather.getHumidity(),
                                currentWeather.getPrecipChance(),
                                currentWeather.getTimezone()
                        );

                        binding.setWeather(displayWeather);

                    } else {
                        alertUserAboutError();
                    }

                } catch (IOException e) {
                    Log.e(TAG, "IO Exception caught: ", e);
                } catch (JSONException e) {
                    Log.e(TAG,"JSON Exception caught: ",e);
                }
            }
        });
    }
    Log.d(TAG,"Main UI code is running, horray!");
}

public CurrentWeather getCurrentDetails(String jsonData) throws JSONException {
    JSONObject forecast = new JSONObject(jsonData);

    String timezone;

    JSONArray data = forecast.getJSONArray("data");
    for (int i = 0; i< data.length(); i++) {
        JSONObject weatherData = data.getJSONObject(i);

        timezone = weatherData.getString("timezone");
        Log.i(TAG,"From JSON:" + timezone);

        CurrentWeather currentWeather = new CurrentWeather();
        currentWeather.setHumidity(weatherData.getDouble("rh"));

        String icon = weatherData.getJSONObject("weather").getString("icon");
        currentWeather.setIcon(icon);
        Log.i(TAG,"From JSON:" + icon );

        String location = (weatherData.getString("city_name"));
        currentWeather.setLocationLabel(location);
        Log.i(TAG,"From JSON:" + location);

        currentWeather.setPrecipChance(weatherData.getDouble("precip"));
        currentWeather.setTemperature(weatherData.getDouble("temp"));
        currentWeather.setTimezone(timezone);


        Log.d(TAG,currentWeather.getFormattedTime());
    }
    return null;



}



private boolean isNetworkAvailable() {
    ConnectivityManager manager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo networkInfo = manager.getActiveNetworkInfo();
    boolean isAvailable = false;
    if(networkInfo != null && networkInfo.isConnected()){
        isAvailable = true;
    }
    else {
        Toast.makeText(this, R.string.network_is_not_available,
                Toast.LENGTH_LONG).show();
    }
return isAvailable;
}

private void alertUserAboutError() {
    AlertDialogFragment dialog = new AlertDialogFragment();
    dialog.show(getSupportFragmentManager(), "error_dialog");
}

}