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Android Android Lists and Adapters (2015) Lists with RecyclerViews Using a Layout Manager

Lewis Harwood
Lewis Harwood
2,719 Points

App is crashing when I press the hourly button, daily function still works though :(

MainActivity.java package com.lewisharwood.stormy;

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.AppCompatActivity; 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.lewisharwood.stormy.weather.Current; import com.lewisharwood.stormy.weather.Day; import com.lewisharwood.stormy.weather.Forecast; import com.lewisharwood.stormy.weather.Hour;

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

import java.io.IOException;

import butterknife.BindView; import butterknife.ButterKnife; import butterknife.OnClick; import okhttp3.Call; import okhttp3.Callback; import okhttp3.OkHttpClient; import okhttp3.Request; import okhttp3.Response;

public class MainActivity extends AppCompatActivity {

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

private Forecast mForecast;


@BindView(R.id.time_label) 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;
@BindView(R.id.refreshImageView) ImageView mRefreshImageView;
@BindView(R.id.progressBar) ProgressBar mProgressBar;

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

    mProgressBar.setVisibility(View.INVISIBLE);

    final double latitude = 37.8267;
    final double longitude = -122.4233;

    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 = "d9248d8506b0a15852b0d2cc31b4a29b";
    String forecastUrl = "https://api.darksky.net/forecast/" + apiKey +
            "/" + latitude + "," + longitude + "?units=si";


    if (isNetworkAvailiable()) {
        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(Call call, IOException e) {
            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    toggleRefresh();
                }
            });
            alertUserAboutError();
        }

        @Override
        public void onResponse(Call call, 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, R.string.network_unavailable,
                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 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 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 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 isNetworkAvailiable() {
    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() {
    AlertDialogueFragment dialog = new AlertDialogueFragment();
    dialog.show(getFragmentManager(), "error_dialog");
}

@OnClick (R.id.dailyButton)
public void startDailyActivity(View view){
    Intent intent = new Intent(this, DailyForecastActivity.class);
    intent.putExtra(DAILY_FORECAST, mForecast.getDailyForecast());
    startActivity(intent);
}
@OnClick (R.id.hourlyButton)
public void startHourlyActivity(View view) {
    Intent intent = new Intent(this, DailyForecastActivity.class);
    intent.putExtra(HOURLY_FORECAST, mForecast.getHourlyForecast());
    startActivity(intent);
}

};

HourAdapter.java package com.lewisharwood.stormy.adapters;

import android.support.v7.widget.RecyclerView; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ImageView; import android.widget.TextView;

import com.lewisharwood.stormy.R; import com.lewisharwood.stormy.weather.Hour;

public class HourAdapter extends RecyclerView.Adapter<HourAdapter.HourViewHolder>{

private Hour[] mHours;

public HourAdapter(Hour[] hours) {
    mHours = hours;
}

@Override
public HourViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View view = LayoutInflater.from(parent.getContext())
            .inflate(R.layout.hourly_list_item, parent, false);
    HourViewHolder viewHolder = new HourViewHolder(view);
    return viewHolder;
}

@Override
public void onBindViewHolder(HourViewHolder holder, int position) {
    holder.injectHour(mHours[position]);
}

@Override
public int getItemCount() {
    return mHours.length;
}

public class HourViewHolder extends RecyclerView.ViewHolder {

    public TextView mTimeLabel;
    public TextView mSummaryLabel;
    public TextView mTemperatureLabel;
    public ImageView mIconImageView;


    public HourViewHolder(View itemView) {
        super(itemView);

        mTimeLabel = (TextView) itemView.findViewById(R.id.timeLabel);
        mSummaryLabel = (TextView) itemView.findViewById(R.id.summaryLabel);
        mTemperatureLabel = (TextView) itemView.findViewById(R.id.temperatureLabel);
        mIconImageView = (ImageView) itemView.findViewById(R.id.iconImageView);
    }


    public void injectHour(Hour hour) {
        mTimeLabel.setText(hour.getHour());
        mSummaryLabel.setText(hour.getSummary());
        mTemperatureLabel.setText(hour.getTemperature() + "");
        mIconImageView.setImageResource(hour.getIconId());
    }
}

}

HourlyForecastActivity.java package com.lewisharwood.stormy;

import android.content.Intent; import android.os.Parcelable; import android.support.v7.app.ActionBarActivity; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.support.v7.widget.LinearLayoutManager; import android.support.v7.widget.RecyclerView;

import com.lewisharwood.stormy.adapters.HourAdapter; import com.lewisharwood.stormy.weather.Hour;

import java.util.Arrays;

import butterknife.BindView; import butterknife.ButterKnife;

public class HourlyForecastActivity extends ActionBarActivity {

private Hour[] mHours;

@BindView(R.id.recyclerView) RecyclerView mRecyclerView;



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

    Intent intent = getIntent();
    Parcelable[] parcelables = intent.getParcelableArrayExtra(MainActivity.HOURLY_FORECAST);
    mHours = Arrays.copyOf(parcelables, parcelables.length, Hour[].class);

    HourAdapter adapter = new HourAdapter(mHours);
    mRecyclerView.setAdapter(adapter);

    RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(this);
    mRecyclerView.setLayoutManager(layoutManager);

    mRecyclerView.setHasFixedSize(true);
}

}

activity_hourly_forecast.xml <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.lewisharwood.stormy.HourlyForecastActivity" android:background="@drawable/bg_gradient">

<android.support.v7.widget.RecyclerView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/recyclerView"/>

</RelativeLayout>

Hour.java

package com.lewisharwood.stormy.weather;

import android.os.Parcel; import android.os.Parcelable;

import java.text.SimpleDateFormat; import java.util.Date;

public class Hour implements Parcelable{ private long mTime; private String mSummary; private double mTemperature; private String mIcon; private String mTimeZone;

    public Hour() { }

    public long getTime() {
        return mTime;
    }

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

    public String getSummary() {
        return mSummary;
    }

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

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

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

    public String getIcon() {
        return mIcon;
    }

    public int getIconId(){
        return Forecast.getIconId(mIcon);
    }

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

    public String getTimeZone() {
        return mTimeZone;
    }

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

    public String getHour(){
        SimpleDateFormat formatter = new SimpleDateFormat("h a");
        Date date = new Date(mTime * 1000);
        return formatter.format(date);
    }

@Override
public int describeContents() {
    return 0;
}

@Override
public void writeToParcel(Parcel dest, int flags) {
    dest.writeLong(mTime);
    dest.writeDouble(mTemperature);
    dest.writeString(mSummary);
    dest.writeString(mIcon);
    dest.writeString(mTimeZone);
}
private Hour(Parcel in){
    mTime = in.readLong();
    mTemperature = in.readDouble();
    mSummary = in.readString();
    mIcon = in.readString();
    mTimeZone = in.readString();
}

public static final Creator<Hour> CREATOR = new Creator<Hour>(){
    @Override
    public Hour createFromParcel(Parcel source) { {return new Hour(source);}
    }

    @Override
    public Hour[] newArray(int size) {
        return new Hour[size];
    }
    };
}

The code also gives me no errors when in android studio so I must have just written something completely wrong :/

1 Answer

Seth Kroger
Seth Kroger
56,414 Points

When you create the Intent to launch the new Activity, you're using DailyForecastActivity instead of HourlyForecastActivity.