Android Open Source - bitfynd-wallet-android Settings Fragment

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License

The source code is released under:
GNU General Public License
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Java Source Code

/*
 * Copyright 2014 the original author or authors.
 */*  www. j a  va  2  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.preference;

import javax.annotation.Nonnull;

import android.app.Activity;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.os.Handler;
import android.preference.Preference;
import android.preference.Preference.OnPreferenceChangeListener;
import android.preference.PreferenceFragment;
import de.schildbach.wallet.Configuration;
import de.schildbach.wallet.WalletApplication;
import de.schildbach.wallet.WalletBalanceWidgetProvider;
import de.schildbach.wallet.R;

/**
 * @author Andreas Schildbach
 */
public final class SettingsFragment extends PreferenceFragment implements OnPreferenceChangeListener
{
  private Activity activity;
  private WalletApplication application;

  private final Handler handler = new Handler();

  private Preference btcPrecisionPreference;
  private Preference trustedPeerPreference;
  private Preference trustedPeerOnlyPreference;

  @Override
  public void onAttach(final Activity activity)
  {
    super.onAttach(activity);

    this.activity = activity;
    this.application = (WalletApplication) activity.getApplication();
  }

  @Override
  public void onCreate(final Bundle savedInstanceState)
  {
    super.onCreate(savedInstanceState);

    addPreferencesFromResource(R.xml.preference_settings);

    btcPrecisionPreference = findPreference(Configuration.PREFS_KEY_BTC_PRECISION);
    btcPrecisionPreference.setOnPreferenceChangeListener(this);

    trustedPeerPreference = findPreference(Configuration.PREFS_KEY_TRUSTED_PEER);
    trustedPeerPreference.setOnPreferenceChangeListener(this);

    trustedPeerOnlyPreference = findPreference(Configuration.PREFS_KEY_TRUSTED_PEER_ONLY);
    trustedPeerOnlyPreference.setOnPreferenceChangeListener(this);

    final SharedPreferences prefs = getPreferenceManager().getSharedPreferences();
    final String trustedPeer = prefs.getString(Configuration.PREFS_KEY_TRUSTED_PEER, "").trim();
    updateTrustedPeer(trustedPeer);
  }

  @Override
  public void onDestroy()
  {
    trustedPeerOnlyPreference.setOnPreferenceChangeListener(null);
    trustedPeerPreference.setOnPreferenceChangeListener(null);
    btcPrecisionPreference.setOnPreferenceChangeListener(null);

    super.onDestroy();
  }

  @Override
  public boolean onPreferenceChange(final Preference preference, final Object newValue)
  {
    // delay action because preference isn't persisted until after this method returns
    handler.post(new Runnable()
    {
      @Override
      public void run()
      {
        if (preference.equals(btcPrecisionPreference))
        {
          WalletBalanceWidgetProvider.updateWidgets(activity, application.getWallet());
        }
        else if (preference.equals(trustedPeerPreference))
        {
          application.stopBlockchainService();
          updateTrustedPeer((String) newValue);
        }
        else if (preference.equals(trustedPeerOnlyPreference))
        {
          application.stopBlockchainService();
        }
      }
    });

    return true;
  }

  private void updateTrustedPeer(@Nonnull final String trustedPeer)
  {
    if (trustedPeer.isEmpty())
    {
      trustedPeerPreference.setSummary(R.string.preferences_trusted_peer_summary);
      trustedPeerOnlyPreference.setEnabled(false);
    }
    else
    {
      trustedPeerPreference.setSummary(trustedPeer);
      trustedPeerOnlyPreference.setEnabled(true);
    }
  }
}
Java Source Code List
