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Save a copy of the downloaded data as cached data
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,66 +1,95 @@ | ||
| package net.trajano.gasprices; | ||
|
|
||
| import java.io.IOException; | ||
| import java.net.HttpURLConnection; | ||
| import java.net.URL; | ||
| import java.util.Scanner; | ||
|
|
||
| import org.json.JSONException; | ||
| import org.json.JSONObject; | ||
| import org.json.JSONTokener; | ||
|
|
||
| import android.util.Log; | ||
|
|
||
| public final class GetDataUtil { | ||
| /** | ||
| * This will connect to the Internet to get the gas price data and return | ||
| * the parsed {@link JSONObject}. This will throw an {@link IOException} if | ||
| * there is an error parsing the data because there isn't anything that can | ||
| * be done if there is a parse error, but the {@link IOException} is still | ||
| * thrown for any communication errors. | ||
| * | ||
| * @return a parsed JSONObject. | ||
| * @throws IOException | ||
| * I/O error. | ||
| */ | ||
| public static JSONObject getGasPricesDataFromInternet() throws IOException { | ||
| try { | ||
| // Read the JSON data, skip the first character since it | ||
| // breaks the parsing. | ||
| final String jsonData = getRawGasPricesDataFromInternet(); | ||
| final Object value = new JSONTokener(jsonData).nextValue(); | ||
| if (value instanceof JSONObject) { | ||
| return (JSONObject) value; | ||
| } else { | ||
| throw new IOException("Did not get a proper JSON object"); | ||
| } | ||
| } catch (final JSONException e) { | ||
| Log.e("GasPrices", e.getMessage()); | ||
| throw new IOException(e); | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * This connects to the site to get the data as is. Used for the situation | ||
| * where an error had occured. | ||
| * | ||
| * @return | ||
| * @throws IOException | ||
| */ | ||
| public static String getRawGasPricesDataFromInternet() throws IOException { | ||
| final HttpURLConnection urlConnection = (HttpURLConnection) new URL( | ||
| "http://www.tomorrowsgaspricetoday.com/mobile/json_mobile_data.php") | ||
| .openConnection(); | ||
| try { | ||
| return new Scanner(urlConnection.getInputStream()) | ||
| .useDelimiter("\\A").next().substring(1); | ||
| } finally { | ||
| urlConnection.disconnect(); | ||
| } | ||
| } | ||
|
|
||
| private GetDataUtil() { | ||
|
|
||
| } | ||
|
|
||
| } | ||
| package net.trajano.gasprices; | ||
|
|
||
| import java.io.File; | ||
| import java.io.FileInputStream; | ||
| import java.io.FileOutputStream; | ||
| import java.io.IOException; | ||
| import java.io.InputStream; | ||
| import java.net.HttpURLConnection; | ||
| import java.net.URL; | ||
| import java.util.Scanner; | ||
|
|
||
| import org.json.JSONException; | ||
| import org.json.JSONObject; | ||
| import org.json.JSONTokener; | ||
|
|
||
| import android.util.Log; | ||
|
|
||
| public final class GetDataUtil { | ||
| /** | ||
| * This will connect to the Internet to get the gas price data and return | ||
| * the parsed {@link JSONObject}. This will throw an {@link IOException} if | ||
| * there is an error parsing the data because there isn't anything that can | ||
| * be done if there is a parse error, but the {@link IOException} is still | ||
| * thrown for any communication errors. | ||
| * | ||
| * @param cacheDir | ||
| * cache directory | ||
| * | ||
| * @return a parsed JSONObject. | ||
| * @throws IOException | ||
| * I/O error. | ||
| */ | ||
| public static JSONObject getGasPricesDataFromInternet(final File cacheDir) | ||
| throws IOException { | ||
| try { | ||
| // Read the JSON data, skip the first character since it | ||
| // breaks the parsing. | ||
| final String jsonData = getRawGasPricesDataFromInternet(cacheDir); | ||
| final Object value = new JSONTokener(jsonData).nextValue(); | ||
| if (value instanceof JSONObject) { | ||
| return (JSONObject) value; | ||
| } else { | ||
| throw new IOException("Did not get a proper JSON object"); | ||
| } | ||
| } catch (final JSONException e) { | ||
| Log.e("GasPrices", e.getMessage()); | ||
| throw new IOException(e); | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * This connects to the site to get the data as is. Used for the situation | ||
| * where an error had occured. | ||
| * | ||
| * @param cacheDir | ||
| * cache directory | ||
| * | ||
| * @return | ||
| * @throws IOException | ||
| */ | ||
| public static String getRawGasPricesDataFromInternet(final File cacheDir) | ||
| throws IOException { | ||
| final File cacheFile = new File(cacheDir, "cached"); | ||
| final HttpURLConnection urlConnection = (HttpURLConnection) new URL( | ||
| "http://www.tomorrowsgaspricetoday.com/mobile/json_mobile_data.php") | ||
| .openConnection(); | ||
| FileOutputStream cacheFileStream = null; | ||
| try { | ||
| final InputStream networkStream = urlConnection.getInputStream(); | ||
| // Skip the first character. | ||
| networkStream.read(); | ||
| cacheFileStream = new FileOutputStream(cacheFile); | ||
| final int c = networkStream.read(); | ||
| while (c != -1) { | ||
| cacheFileStream.write(c); | ||
| } | ||
| } finally { | ||
| if (cacheFileStream != null) { | ||
| cacheFileStream.close(); | ||
| } | ||
| urlConnection.disconnect(); | ||
| } | ||
| final FileInputStream cacheInputStream = new FileInputStream(cacheFile); | ||
| try { | ||
| return new Scanner(cacheInputStream).useDelimiter("\\A").next(); | ||
| } finally { | ||
| cacheInputStream.close(); | ||
| } | ||
| } | ||
|
|
||
| private GetDataUtil() { | ||
|
|
||
| } | ||
|
|
||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,80 +1,81 @@ | ||
| package net.trajano.gasprices; | ||
|
|
||
| import java.io.IOException; | ||
|
|
||
| import org.json.JSONObject; | ||
|
|
||
| import android.app.AlertDialog; | ||
| import android.appwidget.AppWidgetManager; | ||
| import android.content.ComponentName; | ||
| import android.content.Context; | ||
| import android.content.Intent; | ||
| import android.os.AsyncTask; | ||
| import android.util.Log; | ||
|
|
||
| public class UpdateTask extends AsyncTask<Void, Void, Exception> { | ||
| private final Context context; | ||
|
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| public UpdateTask(final Context context) { | ||
| super(); | ||
| this.context = context; | ||
| } | ||
|
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| @Override | ||
| protected Exception doInBackground(final Void... params) { | ||
| final PreferenceAdaptor preferences = new PreferenceAdaptor(context); | ||
| final PreferenceAdaptorEditor editor = preferences.edit(); | ||
|
|
||
| try { | ||
| final JSONObject data = GetDataUtil.getGasPricesDataFromInternet(); | ||
| editor.setJsonData(data); | ||
| editor.setLastUpdatedToNow(); | ||
| return null; | ||
| } catch (final IOException e) { | ||
| // TODO fix this is yucky | ||
| Log.e("GasPrices", e.getMessage() + " and cry"); | ||
| try { | ||
| editor.setLastError(e.getMessage(), | ||
| GetDataUtil.getRawGasPricesDataFromInternet()); | ||
| } catch (final IOException e2) { | ||
| editor.setLastError(e.getMessage(), ""); | ||
| return e2; | ||
| } | ||
| return e; | ||
| } finally { | ||
| editor.apply(); | ||
| } | ||
| } | ||
|
|
||
| @Override | ||
| protected void onPostExecute(final Exception result) { | ||
| if (result == null) { | ||
| final AppWidgetManager widgetManager = AppWidgetManager | ||
| .getInstance(context); | ||
| final ComponentName widgetComponent = new ComponentName(context, | ||
| GasPricesWidgetProvider.class); | ||
| final int[] widgetIds = widgetManager | ||
| .getAppWidgetIds(widgetComponent); | ||
| if (widgetIds.length > 0) { | ||
| final Intent update = new Intent(); | ||
| update.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, widgetIds); | ||
| update.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE); | ||
| context.sendBroadcast(update); | ||
| } | ||
| } else { | ||
| new AlertDialog.Builder(context) | ||
| .setTitle(R.string.error) | ||
| .setMessage( | ||
| context.getString(R.string.problem_loading_format, | ||
| result.getLocalizedMessage())).show(); | ||
| } | ||
| } | ||
|
|
||
| @Override | ||
| protected void onPreExecute() { | ||
| final PreferenceAdaptor preferences = new PreferenceAdaptor(context); | ||
| final PreferenceAdaptorEditor editor = preferences.edit(); | ||
| editor.removeLastError(); | ||
| editor.apply(); | ||
| } | ||
| } | ||
| package net.trajano.gasprices; | ||
|
|
||
| import java.io.IOException; | ||
|
|
||
| import org.json.JSONObject; | ||
|
|
||
| import android.app.AlertDialog; | ||
| import android.appwidget.AppWidgetManager; | ||
| import android.content.ComponentName; | ||
| import android.content.Context; | ||
| import android.content.Intent; | ||
| import android.os.AsyncTask; | ||
| import android.util.Log; | ||
|
|
||
| public class UpdateTask extends AsyncTask<Void, Void, Exception> { | ||
| private final Context context; | ||
|
|
||
| public UpdateTask(final Context context) { | ||
| super(); | ||
| this.context = context; | ||
| } | ||
|
|
||
| @Override | ||
| protected Exception doInBackground(final Void... params) { | ||
| final PreferenceAdaptor preferences = new PreferenceAdaptor(context); | ||
| final PreferenceAdaptorEditor editor = preferences.edit(); | ||
|
|
||
| try { | ||
| final JSONObject data = GetDataUtil | ||
| .getGasPricesDataFromInternet(context.getCacheDir()); | ||
| editor.setJsonData(data); | ||
| editor.setLastUpdatedToNow(); | ||
| return null; | ||
| } catch (final IOException e) { | ||
| // TODO fix this is yucky | ||
| Log.e("GasPrices", e.getMessage() + " and cry"); | ||
| try { | ||
| editor.setLastError(e.getMessage(), GetDataUtil | ||
| .getRawGasPricesDataFromInternet(context.getCacheDir())); | ||
| } catch (final IOException e2) { | ||
| editor.setLastError(e.getMessage(), ""); | ||
| return e2; | ||
| } | ||
| return e; | ||
| } finally { | ||
| editor.apply(); | ||
| } | ||
| } | ||
|
|
||
| @Override | ||
| protected void onPostExecute(final Exception result) { | ||
| if (result == null) { | ||
| final AppWidgetManager widgetManager = AppWidgetManager | ||
| .getInstance(context); | ||
| final ComponentName widgetComponent = new ComponentName(context, | ||
| GasPricesWidgetProvider.class); | ||
| final int[] widgetIds = widgetManager | ||
| .getAppWidgetIds(widgetComponent); | ||
| if (widgetIds.length > 0) { | ||
| final Intent update = new Intent(); | ||
| update.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, widgetIds); | ||
| update.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE); | ||
| context.sendBroadcast(update); | ||
| } | ||
| } else { | ||
| new AlertDialog.Builder(context) | ||
| .setTitle(R.string.error) | ||
| .setMessage( | ||
| context.getString(R.string.problem_loading_format, | ||
| result.getLocalizedMessage())).show(); | ||
| } | ||
| } | ||
|
|
||
| @Override | ||
| protected void onPreExecute() { | ||
| final PreferenceAdaptor preferences = new PreferenceAdaptor(context); | ||
| final PreferenceAdaptorEditor editor = preferences.edit(); | ||
| editor.removeLastError(); | ||
| editor.apply(); | ||
| } | ||
| } |