Last active
August 29, 2015 14:10
-
-
Save natebass/f392af32628580e0ea88 to your computer and use it in GitHub Desktop.
Query the OpenWeatherMap API
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
/* | |
* From the Udacity course "Developing Android Applications" Lesson 2 | |
*/ | |
// These two need to be declared outside the try/catch | |
// so that they can be closed in the finally block. | |
HttpURLConnection urlConnection = null; | |
BufferedReader reader = null; | |
// Will contain the raw JSON response as a string. | |
String forecastJsonStr = null; | |
try { | |
// Construct the URL for the OpenWeatherMap query | |
// Possible parameters are avaiable at OWM's forecast API page, at | |
// http://openweathermap.org/API#forecast | |
URL url = new URL("http://api.openweathermap.org/data/2.5/forecast/daily?q=94043&mode=json&units=metric&cnt=7"); | |
// Create the request to OpenWeatherMap, and open the connection | |
urlConnection = (HttpURLConnection) url.openConnection(); | |
urlConnection.setRequestMethod("GET"); | |
urlConnection.connect(); | |
// Read the input stream into a String | |
InputStream inputStream = urlConnection.getInputStream(); | |
StringBuffer buffer = new StringBuffer(); | |
if (inputStream == null) { | |
// Nothing to do. | |
forecastJsonStr = null; | |
} | |
reader = new BufferedReader(new InputStreamReader(inputStream)); | |
String line; | |
while ((line = reader.readLine()) != null) { | |
// Since it's JSON, adding a newline isn't necessary (it won't affect parsing) | |
// But it does make debugging a *lot* easier if you print out the completed | |
// buffer for debugging. | |
buffer.append(line + "\n"); | |
} | |
if (buffer.length() == 0) { | |
// Stream was empty. No point in parsing. | |
forecastJsonStr = null; | |
} | |
forecastJsonStr = buffer.toString(); | |
} catch (IOException e) { | |
Log.e("PlaceholderFragment", "Error ", e); | |
// If the code didn't successfully get the weather data, there's no point in attemping | |
// to parse it. | |
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); | |
} | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment