Runtime Error

apply plugin:'com.android.application'
apply plugin: 'android-apt'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.3"

    defaultConfig {
        applicationId "com.examp.theodorusjasontjahja.stormy"
        minSdkVersion 15
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.4.0'
    compile 'com.squareup.okhttp3:okhttp:3.4.1'
    compile 'com.jakewharton:butterknife:8.2.1'
    apt 'com.jakewharton:butterknife-compiler:8.2.1'

}

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.1.2'
        classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'


        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

<?xml version="1.0" encoding="utf-8"?>
<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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.theodorusjasontjahja.stormy.MainActivity"
    android:background="#fc970b">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="--"
        android:id="@+id/temperatureLabel"
        android:textColor="@android:color/white"
        android:textSize="150sp"
        android:layout_centerVertical="true"
        android:layout_centerHorizontal="true"/>

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/degreeImageView"
        android:layout_alignTop="@+id/temperatureLabel"
        android:layout_toRightOf="@+id/temperatureLabel"
        android:layout_toEndOf="@+id/temperatureLabel"
        android:src="@drawable/degree"
        android:paddingTop="50dp"/>

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="..."
        android:id="@+id/timeLabel"
        android:textColor="#80ffffff"
        android:textSize="18sp"
        android:layout_above="@+id/temperatureLabel"
        android:layout_centerHorizontal="true"/>

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Alcatraz Island, CA"
        android:id="@+id/locationLabel"
        android:layout_above="@+id/temperatureLabel"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="60dp"
        android:textColor="@android:color/white"
        android:textSize="24sp"/>

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/iconImageView"
        android:src="@drawable/cloudy_night"
        android:layout_alignBottom="@+id/locationLabel"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"/>

    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/temperatureLabel"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="10dp"
        android:weightSum="100"
        android:id="@+id/linearLayout">

        <LinearLayout
            android:orientation="vertical"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_weight="50"
            >

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="HUMIDITY"
                android:id="@+id/humidityLabel"
                android:textColor="#80ffffff"
                android:gravity="center_horizontal"/>

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="--"
                android:id="@+id/humidityValue"
                android:textColor="@android:color/white"
                android:textSize="24sp"
                android:gravity="center_horizontal"/>
        </LinearLayout>

        <LinearLayout
            android:orientation="vertical"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_weight="50">

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="RAIN/SNOW?"
                android:id="@+id/precipLabel"
                android:textColor="#80ffffff"
                android:gravity="center_horizontal"/>

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="--"
                android:id="@+id/precipValue"
                android:textColor="@android:color/white"
                android:textSize="24sp"
                android:gravity="center_horizontal"/>
        </LinearLayout>
    </LinearLayout>

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Getting current weather..."
        android:id="@+id/summaryLabel"
        android:layout_below="@+id/linearLayout"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="40dp"
        android:textColor="@android:color/white"
        android:textSize="18sp"
        android:gravity="center_horizontal"/>

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/refreshImageView"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:src="@drawable/refresh"/>

    <ProgressBar
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/progressBar"
        android:layout_alignBottom="@+id/refreshImageView"
        android:layout_centerHorizontal="true"/>
</RelativeLayout>

public class MainActivity extends AppCompatActivity {

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

    @BindView(R.id.timeLabel) TextView mTimeLabel;
    @BindView(R.id.temperatureLabel) TextView mTemperatureLabel;
    @BindView(R.id.humidityValue) TextView mHumidityValue;
    @BindView(R.id.precipValue) TextView mPrecipValue;
    @BindView(R.id.summaryLabel) TextView mSummaryLabel;
    @BindView(R.id.iconImageView) ImageView mIconImageView;


    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        ButterKnife.bind(this);

        String apiKey = ****** ;
        double latitude = 37.8267;
        double longtitude= -122.423;

        String foreCastURL = "https://api.forecast.io/forecast/" + apiKey +
                             "/" + latitude + "," + longtitude;

        if(isNetworkAvailabe()){

            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(Call call, IOException e) {

                }

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

                        if (response.isSuccessful()) {
                            mCurrentWeather = getCurrentDetails(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, R.string.network_unavailable_message, Toast.LENGTH_LONG).show();
        }
        Log.d(TAG,"Main UI code is running!");
    }
    private void updateDisplay() {

            // Temperature
            String temperatureFormat = getResources().getString(R.string.integerOutput);
            int currentTemperature = mCurrentWeather.getTemperature();
            String temperatureLabel = String.format(temperatureFormat,currentTemperature);
            mTemperatureLabel.setText(temperatureLabel);

            // Time
            String timeFormat = getString(R.string.timeString);
            String currentTime = mCurrentWeather.getFormattedTime();
            String timeLabel = String.format(timeFormat,currentTime);
            mTimeLabel.setText(timeLabel);

            // Humidity
            String humidityFormat = getString(R.string.percentageOutput);
            int currentHumidity = mCurrentWeather.getHumidity();
            String humidityLabel = String.format(humidityFormat,currentHumidity);
            mHumidityValue.setText(humidityLabel);

            //Precipitation Chance
            String precipitationFormat = getString(R.string.percentageOutput);
            int currentPrecipitationChance = mCurrentWeather.getPrecipitationChance();
            String precipitationLabel = String.format(precipitationFormat, currentPrecipitationChance);
            mPrecipValue.setText(precipitationLabel);

            // Summary Text
            mSummaryLabel.setText(mCurrentWeather.getSummary());

            // Icon Update
            Drawable drawable = ResourcesCompat.getDrawable(getResources(), mCurrentWeather.getIconId(), null);
            mIconImageView.setImageDrawable(drawable);
    }

    private CurrentWeather 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");
        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.setSummary(currently.getString("summary"));
        currentWeather.setTemperature(currently.getDouble("temperature"));
        currentWeather.setTimeZone(timezone);

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

    private boolean isNetworkAvailabe() {
        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");
    }
}

public class CurrentWeather {
    private String mIcon;
    private long mTime;
    private double mTemperature;
    private double mHumidity;
    private double mPrecipChance;
    private String mSummary;
    private String mTimeZone;

    public String getTimeZone() {
        return mTimeZone;
    }

    public void setTimeZone(String timeZone) {
        mTimeZone = timeZone;
    }

    public String getIcon() {
        return mIcon;
    }

    public void setIcon(String icon) {
        mIcon = icon;
    }

    public int getIconId(){
        //clear-day, clear-night, rain, snow, sleet, wind, fog, cloudy, partly-cloudy-day, or partly-cloudy-night
        int iconId = R.drawable.clear_day;

         if (mIcon.equals("clear-day")) {
            iconId = R.drawable.clear_day;
        }
        else if (mIcon.equals("clear-night")) {
            iconId = R.drawable.clear_night;
        }
        else if (mIcon.equals("rain")) {
            iconId = R.drawable.rain;
        }
        else if (mIcon.equals("snow")) {
            iconId = R.drawable.snow;
        }
        else if (mIcon.equals("sleet")) {
            iconId = R.drawable.sleet;
        }
        else if (mIcon.equals("wind")) {
            iconId = R.drawable.wind;
        }
        else if (mIcon.equals("fog")) {
            iconId = R.drawable.fog;
        }
        else if (mIcon.equals("cloudy")) {
            iconId = R.drawable.cloudy;
        }
        else if (mIcon.equals("partly-cloudy-day")) {
            iconId = R.drawable.partly_cloudy;
        }
        else if (mIcon.equals("partly-cloudy-night")) {
            iconId = R.drawable.cloudy_night;
        }

        return iconId;
    }

    public long getTime() {
        return mTime;
    }

    public String getFormattedTime(){
        SimpleDateFormat formatter = new SimpleDateFormat("h:mm a");
        formatter.setTimeZone(TimeZone.getTimeZone(getTimeZone()));
        Date dateTime = new Date(getTime() * 1000);
        String timeString = formatter.format(dateTime);

        return timeString;

    }

    public void setTime(long time) {
        mTime = time;
    }

    public int getTemperature() {
        return (int)Math.round(mTemperature);
    }

    public void setTemperature(double temperature) {
        mTemperature = temperature;
    }

    public int getHumidity() {
        return (int)mHumidity;
    }

    public void setHumidity(double humidity) {
        mHumidity = humidity;
    }

    public int getPrecipitationChance() {
        double precipPrecentage = mPrecipChance * 100;
        return (int) Math.round(precipPrecentage);
    }

    public void setPrecipChance(double precipChance) {
        mPrecipChance = precipChance;
    }

    public String getSummary() {
        return mSummary;
    }

    public void setSummary(String summary) {
        mSummary = summary;
    }

<resources>
    <string name="app_name">Stormy</string>
    <string name="error_title">Oops! Sorry!</string>
    <string name="error_message">There was an error. Please try again.</string>
    <string name="error_ok_button_text">OK</string>
    <string name="network_unavailable_message">Network is unavailable !</string>
    <string name="tempPreview">--</string>
    <string name="degree_symbol">Degree Symbol</string>
    <string name="timePreview">…</string>
    <string name="defaultLocation">Alcatraz Island, CA</string>
    <string name="defaultLocationForScreenReaders">Current Weather Location</string>
    <string name="humidityColumnHeader">HUMIDITY</string>
    <string name="humidityPreview">--</string>
    <string name="precipColumnHeader">RAIN/SNOW?</string>
    <string name="precipPreview">--</string>
    <string name="summaryPreview">Getting Current Weather…</string>
    <string name="timeString">At %1$s it will be</string>
    <string name="percentageOutput">%d%%</string>
    <string name="integerOutput">%d</string>
</resources>