JSON array to a Java array | last lesson

// JSON array to a Java array last lesson

MainActivity.java

package com.teamtreehouse.stormy.UI;

import android.content.Context;
import android.graphics.drawable.Drawable;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.ImageView;
import android.widget.ProgressBar;
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 com.teamtreehouse.stormy.R;
import com.teamtreehouse.stormy.weather.Current;
import com.teamtreehouse.stormy.weather.Day;
import com.teamtreehouse.stormy.weather.Forecast;
import com.teamtreehouse.stormy.weather.Hour;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.io.IOException;

import butterknife.ButterKnife;
import butterknife.InjectView;


public class MainActivity extends ActionBarActivity {

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

    private Forecast mForecast;

    @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;
    @InjectView(R.id.iconImageView) ImageView mIconImageView;
    @InjectView(R.id.refreshImageView) ImageView mRefreshImageView;
    @InjectView(R.id.progressBar) ProgressBar mProgressBar;

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

        mProgressBar.setVisibility(View.INVISIBLE);

        final double latitude = 37.8267;
        final double longitude = -122.423;

        mRefreshImageView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                getForecast(latitude, longitude);

            }
        });

        getForecast(latitude, longitude);

        Log.d(TAG, "Main UI code is running!");
    }

    private void getForecast(double latitude, double longitude) {
        String apiKey = "d5faf0cb201f103df4dde0b8b0a4f490";
        String forecastUrl = "https://api.forecast.io/forecast/" + apiKey +
                "/" + latitude + "," + longitude;

        if (isNetworkAvailable()) {
            toggleRefresh();

            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) {
                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            toggleRefresh();
                        }
                    });
                    alertUserAboutError();
                }

                @Override
                public void onResponse(Response response) throws IOException {
                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            toggleRefresh();
                        }
                    });
                    try {
                        String jsonData = response.body().string();
                        Log.v(TAG, jsonData);
                        if (response.isSuccessful()) {
                            mForecast = parseForecastDetails(jsonData);
                            runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    updateDisplay();
                                }
                            });
                        } else {
                            alertUserAboutError();
                        }
                    } catch (IOException e) {
                        Log.e(TAG, "Exception caught: ", e);
                    } catch (JSONException e) {
                        Log.e(TAG, "Exception caught: ", e);
                    }
                }
            });
        }
            else {
                Toast.makeText(this, getString(R.string.network_unavailable_message), Toast.LENGTH_LONG).show();
        }
    }

    private void toggleRefresh() {
        if(mProgressBar.getVisibility() == View.INVISIBLE) {
            mProgressBar.setVisibility(View.VISIBLE);
            mRefreshImageView.setVisibility(View.INVISIBLE);
        }
        else {
            mProgressBar.setVisibility(View.INVISIBLE);
            mRefreshImageView.setVisibility(View.VISIBLE);
        }
    }

    private void updateDisplay() {
        Current current = mForecast.getCurrent();

        mTemperatureLabel.setText(current.getTemperature() + "");
        mTimeLabel.setText("At " + current.getFormattedTime() + " it will be");
        mHumidityValue.setText(current.getHumidity() + "");
        mPrecipValue.setText(current.getPrecipChance() + "%");
        mSummaryLabel.setText(current.getSummary());

        Drawable drawable = getResources().getDrawable(current.getIconId());
        mIconImageView.setImageDrawable(drawable);
    }

    private Forecast parseForecastDetails(String jsonData) throws JSONException {
        Forecast forecast = new Forecast();

        forecast.setCurrent(getCurrentDetails(jsonData));
        forecast.setHourlyForecast(getHourlyForecast(jsonData));
        forecast.setDailyForecast(getDailyForecast(jsonData));
        return forecast;
    }

    //For notes, see the private Hour[] below this one
    private Day[] getDailyForecast(String jsonData) throws JSONException {
        JSONObject forecast = new JSONObject(jsonData);
        String timezone = forecast.getString("timezone");

        JSONObject daily = forecast.getJSONObject("daily");
        JSONArray data = daily.getJSONArray("data");

        Day[] days = new Day[data.length()];
        for (int i = 0; i < data.length(); i++) {
            JSONObject jsonDay = data.getJSONObject(i);
            Day day = new Day();

            day.setSummary(jsonDay.getString("summary"));
            day.setIcon(jsonDay.getString("icon"));
            day.setTemperatureMax(jsonDay.getDouble("temperatureMax"));
            day.setTime(jsonDay.getLong("time"));
            day.setTimezone(timezone);

            days[i] = day;
        }
            return days;

    }

    private Hour[] getHourlyForecast(String jsonData) throws JSONException {
        JSONObject forecast = new JSONObject(jsonData);
        String timezone = forecast.getString("timezone"); // [******]
        JSONObject hourly = forecast.getJSONObject("hourly");
        JSONArray data = hourly.getJSONArray("data");

        //Hopefully this is just review for you:
        Hour [] hours = new Hour[data.length()];  //unlike for a regular Array, where its just .length, for JSONArray we need to call a method instead of accessing a property, thus .length()

        // Now we can loop through all the items in the JSONArray, get the data we want from each one, and set a new Hour object in the hours array.
        for (int i = 0; i < data.length(); i++){ //test the int against the data.length and increment it by 1 each time
            JSONObject jsonHour = data.getJSONObject(i);

            // Now that we have a JSONObject, we can use it to populate our model object, just like we see in our getCurrentDetails method below.
            // So let's add a line and we'll create a new Hour variable to populate,
            Hour hour = new Hour();  //Caution, make sure you have the Hour hour = new Hour(); above inside the for-loop, because if not, JAVA will just populate the array with the same object over and over again.
            //And now we'll set all the values for this new object using the jsonHour object.
            hour.setSummary(jsonHour.getString("summary")); // get the String data //pass in the "key"    // or should I say pass in the "key" to get the String data
            hour.setTemperature(jsonHour.getDouble("temperature")); //get the Double data //pass in the "key"
            hour.setIcon(jsonHour.getString("icon"));
            hour.setTime(jsonHour.getLong("time"));
            hour.setTimezone(timezone); // [******] // remember 'timezone' is not in a "string key" like the other ones

            //Now we need to store it in the array
            hours[i] = hour;
        }

        return hours;
                                             //Now let's do the same thing with the DailyForecast
    }



    private Current getCurrentDetails(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");

        Current current = new Current();
        current.setHumidity(currently.getDouble("humidity"));
        current.setTime(currently.getLong("time"));
        current.setIcon(currently.getString("icon"));
        current.setPrecipChance(currently.getDouble("precipProbability"));
        current.setSummary(currently.getString("summary"));
        current.setTemperature(currently.getDouble("temperature"));
        current.setTimeZone(timezone);

        Log.d(TAG, current.getFormattedTime());

        return current;
    }

    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");
    }
}


// https://teamtreehouse.com/library/android-lists-and-adapters/updating-the-data-model/introducing-jsonarray
// https://teamtreehouse.com/library/android-lists-and-adapters/updating-the-data-model/from-jsonarray-to-a-java-array