Android Open Source - bitfynd-wallet-android Exchange Rate Loader

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License

The source code is released under:

GNU General Public License

Java Source Code

/*
 * Copyright 2012-2014 the original author or authors.
 */* w  w w. ja  va2 s.  co m*/
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package de.schildbach.wallet.ui;

import android.content.Context;
import android.content.CursorLoader;
import android.content.SharedPreferences;
import android.content.SharedPreferences.OnSharedPreferenceChangeListener;

import de.schildbach.wallet.BuildConfig;
import de.schildbach.wallet.Configuration;
import de.schildbach.wallet.ExchangeRatesProvider;

/**
 * @author Andreas Schildbach
 */
public final class ExchangeRateLoader extends CursorLoader implements OnSharedPreferenceChangeListener
{
  private final Configuration config;

  public ExchangeRateLoader(final Context context, final Configuration config)
  {
    super(context, ExchangeRatesProvider.contentUri(BuildConfig.APPLICATION_ID, false), null, ExchangeRatesProvider.KEY_CURRENCY_CODE,
        new String[] { null }, null);

    this.config = config;
  }

  @Override
  protected void onStartLoading()
  {
    super.onStartLoading();

    config.registerOnSharedPreferenceChangeListener(this);

    onCurrencyChange();
  }

  @Override
  protected void onStopLoading()
  {
    config.unregisterOnSharedPreferenceChangeListener(this);

    super.onStopLoading();
  }

  @Override
  public void onSharedPreferenceChanged(final SharedPreferences sharedPreferences, final String key)
  {
    if (Configuration.PREFS_KEY_EXCHANGE_CURRENCY.equals(key))
      onCurrencyChange();
  }

  private void onCurrencyChange()
  {
    final String exchangeCurrency = config.getExchangeCurrencyCode();

    setSelectionArgs(new String[] { exchangeCurrency });

    forceLoad();
  }
}

Java Source Code List

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