Does anybody know how to fix this crash?

package everingapplications.rain_gig;

import android.app.AlertDialog;
import android.app.DownloadManager;
import android.content.Context;
import android.location.Location;
import android.location.LocationManager;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.nfc.Tag;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

import com.squareup.okhttp.Call;
import com.squareup.okhttp.Callback;
import com.squareup.okhttp.OkHttpClient;
import com.squareup.okhttp.Request;
import com.squareup.okhttp.Response;

import org.apache.commons.logging.Log;
import org.json.JSONException;
import org.json.JSONObject;

import java.io.IOException;

import butterknife.ButterKnife;
import butterknife.InjectView;

import static android.widget.Toast.LENGTH_LONG;

public class MainActivity extends AppCompatActivity {

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

    private CurrentWeather mCurrentWeather;

    @InjectView(R.id.timeLabel)
    TextView mTimeLabel;
    @InjectView(R.id.temperatureLabel)
    TextView mTemperatureLabel;
    @InjectView(R.id.humidityValue)
    TextView mHumidityValue;
    @InjectView(R.id.precipValue)
    TextView mPrecipValue;
    @InjectView(R.id.summaryLabel)
    TextView mSummaryLabel;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ButterKnife.inject(this);
        updateDisplay();


        LocationManager lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
        Location location = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
        double longitude = location.getLongitude();
        double latitude = location.getLatitude();



        getForecast(latitude, longitude);

        android.util.Log.d(TAG, "The Main UI code is running!");

    }

    private void getForecast(double latitude, double longitude) {
        String apiKEY = "00000000000000000000000";
//I removed my API key, it is classified information
        String forecastURL = "https://api.forecast.io/forecast/" + apiKEY +
                "/" + latitude + "," + longitude;

        if (isNetworkAvailable()) {

            OkHttpClient client = new OkHttpClient();
            Request request = new Request.Builder()
                    .url(forecastURL)
                    .build();
            Call call = client.newCall(request);
            call.enqueue(new Callback() {
                @Override
                public void onFailure(Request request, IOException e) {

                }

                @Override
                public void onResponse(Response response) throws IOException {
                    try {
                        String jsonData = response.body().string();
                        android.util.Log.v(TAG, jsonData);
                        if (response.isSuccessful()) {
                            mCurrentWeather = getCurrentDetails(jsonData);
                            runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    updateDisplay();
                                }
                            });
                        } else {
                            alertUserAboutError();
                        }
                    } catch (IOException e) {
                        android.util.Log.e(TAG, "Exception caught: ", e);
                    } catch (JSONException e) {

                    }
                }
            });
        } else {
            Toast.makeText(this, "No Network Connection.", LENGTH_LONG).show();
        }
    }

    private void updateDisplay() {
        mTemperatureLabel.setText(mCurrentWeather.getTemperature() + "°");
        mTimeLabel.setText("At" + mCurrentWeather.getFormattedTime() + "it will be: ");
        mHumidityValue.setText("Humidity: " + mCurrentWeather.getHumidity() + "");
        mPrecipValue.setText("Precip. Chances: " + mCurrentWeather.getPrecipChance() + "");
        mSummaryLabel.setText(mCurrentWeather.getSummary() + "");
    }


    private CurrentWeather getCurrentDetails(String jsonData) throws JSONException {
        JSONObject forecast = new JSONObject(jsonData);
        String timezone = forecast.getString("timezone");
        android.util.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("precipProbabiltiy"));
        currentWeather.setSummary(currently.getString("summary"));
        currentWeather.setTemperature(currently.getDouble("temperature"));
        currentWeather.setmTimeZone(timezone);
        return currentWeather;
    }

    private boolean isNetworkAvailable() {

        ConnectivityManager manager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo networkInfo = manager.getActiveNetworkInfo();
        boolean isAvailable = false;
        if (networkInfo != null && networkInfo.isConnected()) {
            isAvailable = true;
        }
        return isAvailable;
    }

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

}