Introducing ListViews and ListActivity and emptytextview

// Introducing ListActivity and Display data all or nothing


//this should be at the bottom of the paste but pastebin is bugging out in formatting when I put it there so I put in on the top. Read the Create a new Activity first then come back to this:

DailyForecastActivity.Java

package com.teamtreehouse.stormy.UI;

import android.app.ListActivity;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;

import com.teamtreehouse.stormy.R;

public class DailyForecastActivity extends ListActivity { //change 'ActionBarActivity' to 'ListActivity'

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_daily_forecast);

        // So our real data is going to be an array of dat objects with details about the weather
        // but it takes a little more work so lets start with a mockup with an array of string where each item is simply a day of the week
        // This will illustrate how the main components of a ListView work.
        // And then we can move onto more advanced uses.
        String[] daysOfTheWeek = { "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" };

    }
}

//---------------------------------------------------------------------------------------------

package com.teamtreehouse.stormy.UI;

import android.content.Context;
import android.content.Intent;
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;
import butterknife.OnClick;


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;
    }

    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");

        Hour [] hours = new Hour[data.length()];

        for (int i = 0; i < data.length(); i++){
            JSONObject jsonHour = data.getJSONObject(i);

            Hour hour = new Hour();
            hour.setSummary(jsonHour.getString("summary"));
            hour.setTemperature(jsonHour.getDouble("temperature"));
            hour.setIcon(jsonHour.getString("icon"));
            hour.setTime(jsonHour.getLong("time"));
            hour.setTimezone(timezone);

            hours[i] = hour;
        }

        return hours;
    }



    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");
    }

    //Add onClickListener for the button with butterknife instead of the old regular way
    @OnClick (R.id.dailyButton)
    public void startDailyActivity (View view){
        Intent intent = new Intent(this, DailyForecastActivity.class);
        startActivity(intent);

    }
}

//-----------------------------------------------------------------------------------------

//Read from here FIRST then go back to the top.
//Create a new activity for the DailyForecast

//Right click UI package> NEW> Blank Activity > give the name DailyForecastActivity to the activity> change Heirarchial parent with the[...] to MainActivity.

// to create listview
// go to Designer Tab, under Containers, drag ListView to the screen until it aligns    android:layout_alignParentTop="true" android:layout_alignParentLeft="true"
//then make it match parent for both width and height.


//Now we're actually going to change this ID to a special ID.
// So, type along with me here, type @android:id/list.
// This is a special ID that lets us use a special activity called list activity.
// It makes working with lists a little bit easier.
// Using a special system ID like this is what allows list activity to do some work for us automatically.
activity_daily_forecast.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                xmlns:tools="http://schemas.android.com/tools"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:paddingLeft="@dimen/activity_horizontal_margin"
                android:paddingRight="@dimen/activity_horizontal_margin"
                android:paddingTop="@dimen/activity_vertical_margin"
                android:paddingBottom="@dimen/activity_vertical_margin"
                tools:context="com.teamtreehouse.stormy.UI.DailyForecastActivity"
                android:background="@drawable/bg_gradient"
                >

    <ListView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@android:id/list"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"/>

    <!--empty text view that shows when ListView doesn't have any activity, brought to you specially by @android:id/list -->
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/no_daily_forecast_data"
        android:id="@android:id/empty"   //<------- this is the Android system ID that sets this new TextView as the default empty view for the ListView.
        android:layout_centerVertical="true"
        android:layout_centerHorizontal="true"
        android:textColor="#FFFFFFFF"/>

</RelativeLayout>



//-----------------------------------------------------------------------------






// note to self: I am probably going to have to come back to this lesson for the contacts list of the FeedMe app


// https://teamtreehouse.com/library/android-lists-and-adapters/standard-listviews/introducing-listview-and-listactivity
// https://teamtreehouse.com/library/android-lists-and-adapters/standard-listviews/displaying-list-data-or-none-at-all