BOILING OUT BOILERPLATE

slides.com/mg6maciej/boiling-out-boilerplate-mw2014

Hi, I'm Maciej

BOILERPLATE

NETWORKING

HttpURLConnection urlConnection = null;
BufferedReader reader = null;
String forecastJsonStr = null;
try {
    URL url = new URL("http://api.openweathermap.org/data/2.5/forecast/daily?q=94043&mode=json&units=metric&cnt=7");
    urlConnection = (HttpURLConnection) url.openConnection();
    urlConnection.setRequestMethod("GET");
    urlConnection.connect();
    InputStream inputStream = urlConnection.getInputStream();
    StringBuffer buffer = new StringBuffer();
    if (inputStream == null) {
        forecastJsonStr = null;
    }
    reader = new BufferedReader(new InputStreamReader(inputStream));
    String line;
    while ((line = reader.readLine()) != null) {
        buffer.append(line + "\n");
    }

NETWORKING

    if (buffer.length() == 0) {
        forecastJsonStr = null;
    }
    forecastJsonStr = buffer.toString();
} catch (IOException e) {
    Log.e("PlaceholderFragment", "Error ", e);
    forecastJsonStr = null;
} finally{
    if (urlConnection != null) {
        urlConnection.disconnect();
    }
    if (reader != null) {
        try {
            reader.close();
        } catch (final IOException e) {
            Log.e("PlaceholderFragment", "Error closing stream", e);
        }
    }
}

NETWORKING

JSONObject forecastJson = new JSONObject(forecastJsonStr);
JSONArray weatherArray = forecastJson.getJSONArray("list");
String[] resultStrs = new String[numDays];
for(int i = 0; i < weatherArray.length(); i++) {
    JSONObject dayForecast = weatherArray.getJSONObject(i);
    long dateTime = dayForecast.getLong("dt");
    String day = getReadableDateString(dateTime);
    JSONObject weatherObject = dayForecast.getJSONArray("weather").getJSONObject(0);
    String description = weatherObject.getString("main");
    JSONObject temperatureObject = dayForecast.getJSONObject("temp");
    double high = temperatureObject.getDouble("max");
    double low = temperatureObject.getDouble("min");
    String highAndLow = formatHighLows(high, low);
    resultStrs[i] = day + " - " + description + " - " + highAndLow;
}
return resultStrs;

Networking

• Retrofit
• Picasso

JSR 269

WHO?

• Dagger
• AndroidAnnotations
• ButterKnife
• Parceler
• AndroidAutoValue
• Lombok
  

LOMBOK

LOMBOK

LOMBOK

• @Getter and @Setter
• @EqualsAndHashCode
• @ToString
  
• @Value and @Data
• @Builder
• @Wither
• @Delegate
  

LOMBOK +?

HRISEY

HRISEY

• @Parcelable
• @Preferences
• @InstanceState
  

PROS AND CONS

• (-) generates code in your classes
• (-) no Eclipse support
• (+) generates code in your classes
• (+) can be removed within minutes
  

TALK IS CHEAP,

SHOW ME THE CODE

THE FUTURE

• @Argument
• @Extra
• @DatabaseTable
• @ContentProvider
  
• @MagicViews
• ...

CONTRIBUTING

BONUS

Vielen Games ANDROID CLIENT

Q || A

THANKS!

LINKS

• slides.com/mg6maciej/boiling-out-boilerplate-mw2014
  
• twitter: @mg6maciej
• github: mg6maciej
• simple-github-client
• Vielen Games Android Client