app/src/main/java/uk/me/njae/sunshine/MainActivity.java

   1 package uk.me.njae.sunshine;
   2
   3 import android.support.v7.app.ActionBarActivity;
   4 import android.support.v7.app.ActionBar;
   5 import android.support.v4.app.Fragment;
   6 import android.os.Bundle;
   7 import android.util.Log;
   8 import android.view.LayoutInflater;
   9 import android.view.Menu;
  10 import android.view.MenuItem;
  11 import android.view.View;
  12 import android.view.ViewGroup;
  13 import android.os.Build;
  14 import android.widget.ArrayAdapter;
  15 import android.widget.ListView;
  16
  17 import java.io.BufferedReader;
  18 import java.io.IOException;
  19 import java.io.InputStream;
  20 import java.io.InputStreamReader;
  21 import java.net.HttpURLConnection;
  22 import java.net.URL;
  23
  24
  25 import java.util.ArrayList;
  26 import java.util.List;
  27 import java.util.Arrays;
  28
  29
  30 public class MainActivity extends ActionBarActivity {
  31
  32     @Override
  33     protected void onCreate(Bundle savedInstanceState) {
  34         super.onCreate(savedInstanceState);
  35         setContentView(R.layout.activity_main);
  36         if (savedInstanceState == null) {
  37             getSupportFragmentManager().beginTransaction()
  38                     .add(R.id.container, new PlaceholderFragment())
  39                     .commit();
  40         }
  41     }
  42
  43
  44     @Override
  45     public boolean onCreateOptionsMenu(Menu menu) {
  46         // Inflate the menu; this adds items to the action bar if it is present.
  47         getMenuInflater().inflate(R.menu.main, menu);
  48         return true;
  49     }
  50
  51     @Override
  52     public boolean onOptionsItemSelected(MenuItem item) {
  53         // Handle action bar item clicks here. The action bar will
  54         // automatically handle clicks on the Home/Up button, so long
  55         // as you specify a parent activity in AndroidManifest.xml.
  56         int id = item.getItemId();
  57         if (id == R.id.action_settings) {
  58             return true;
  59         }
  60         return super.onOptionsItemSelected(item);
  61     }
  62
  63     /**
  64      * A placeholder fragment containing a simple view.
  65      */
  66     public static class PlaceholderFragment extends Fragment {
  67
  68         public PlaceholderFragment() {
  69         }
  70
  71         @Override
  72         public View onCreateView(LayoutInflater inflater, ViewGroup container,
  73                 Bundle savedInstanceState) {
  74             View rootView = inflater.inflate(R.layout.fragment_main, container, false);
  75
  76             String[] forecastArray = {
  77                     "Today - Sunny - 10/10",
  78                     "Tomorrow - Cloudy - 11/11",
  79                     "Tuesday - Snow - 12/12",
  80                     "Wednesday - Rain - 13/13",
  81                     "Thursday - Hail - 14/14",
  82                     "Friday - Scorchio - 15/15",
  83                     "Saturday - Fog - 16/16"
  84             };
  85
  86             List<String> weekForecast = new ArrayList<String>(
  87                     Arrays.asList(forecastArray));
  88             ArrayAdapter<String> forecastAdapter = new ArrayAdapter<String>(
  89               getActivity(),
  90                     R.layout.list_item_forecast,
  91                     R.id.list_item_forecast_textview,
  92                     weekForecast
  93             );
  94             ListView list_view = (ListView) rootView.findViewById(R.id.listview_forecast);
  95             list_view.setAdapter(forecastAdapter);
  96
  97             // These two need to be declared outside the try/catch
  98             // so that they can be closed in the finally block.
  99             HttpURLConnection urlConnection = null;
 100             BufferedReader reader = null;
 101
 102             // Will contain the raw JSON response as a string.
 103             String forecastJsonStr = null;
 104
 105             try {
 106                 // Construct the URL for the OpenWeatherMap query
 107                 // Possible parameters are avaiable at OWM's forecast API page, at
 108                 // http://openweathermap.org/API#forecast
 109                 URL url = new URL("http://api.openweathermap.org/data/2.5/forecast/daily?q=94043&mode=json&units=metric&cnt=7");
 110
 111                 // Create the request to OpenWeatherMap, and open the connection
 112                 urlConnection = (HttpURLConnection) url.openConnection();
 113                 urlConnection.setRequestMethod("GET");
 114                 urlConnection.connect();
 115
 116                 // Read the input stream into a String
 117                 InputStream inputStream = urlConnection.getInputStream();
 118                 StringBuffer buffer = new StringBuffer();
 119                 if (inputStream == null) {
 120                     // Nothing to do.
 121                     forecastJsonStr = null;
 122                 }
 123                 reader = new BufferedReader(new InputStreamReader(inputStream));
 124
 125                 String line;
 126                 while ((line = reader.readLine()) != null) {
 127                     // Since it's JSON, adding a newline isn't necessary (it won't affect parsing)
 128                     // But it does make debugging a *lot* easier if you print out the completed
 129                     // buffer for debugging.
 130                     buffer.append(line + "\n");
 131                 }
 132
 133                 if (buffer.length() == 0) {
 134                     // Stream was empty.  No point in parsing.
 135                     forecastJsonStr = null;
 136                 }
 137                 forecastJsonStr = buffer.toString();
 138             } catch (IOException e) {
 139                 Log.e("PlaceholderFragment", "Error ", e);
 140                 // If the code didn't successfully get the weather data, there's no point in attemping
 141                 // to parse it.
 142                 forecastJsonStr = null;
 143             } finally{
 144                 if (urlConnection != null) {
 145                     urlConnection.disconnect();
 146                 }
 147                 if (reader != null) {
 148                     try {
 149                         reader.close();
 150                     } catch (final IOException e) {
 151                         Log.e("PlaceholderFragment", "Error closing stream", e);
 152                     }
 153                 }
 154             }
 155
 156             return rootView;
 157         }
 158     }
 159 }