Android Open Source - bitfynd-wallet-android Maybe Maintenance Fragment

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License

The source code is released under:

GNU General Public License

Java Source Code

/*
 * Copyright 2014 the original author or authors.
 *//w w w  . j ava  2 s. c o  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 java.util.List;

import org.bitcoinj.core.Transaction;
import org.bitcoinj.core.Wallet;
import org.bitcoinj.wallet.DeterministicUpgradeRequiresPassword;

import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentManager;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.support.v4.content.LocalBroadcastManager;

import com.google.common.util.concurrent.ListenableFuture;

import de.schildbach.wallet.WalletApplication;
import de.schildbach.wallet.service.BlockchainService;
import de.schildbach.wallet.service.BlockchainState;
import de.schildbach.wallet.ui.send.MaintenanceDialogFragment;

/**
 * @author Andreas Schildbach
 */
public class MaybeMaintenanceFragment extends Fragment
{
  private static final String FRAGMENT_TAG = MaybeMaintenanceFragment.class.getName();

  public static void add(final FragmentManager fm)
  {
    Fragment fragment = fm.findFragmentByTag(FRAGMENT_TAG);
    if (fragment == null)
    {
      fragment = new MaybeMaintenanceFragment();
      fm.beginTransaction().add(fragment, FRAGMENT_TAG).commit();
    }
  }

  private Wallet wallet;
  private LocalBroadcastManager broadcastManager;
  private boolean dialogWasShown = false;

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

    final WalletApplication application = ((AbstractWalletActivity) activity).getWalletApplication();
    this.wallet = application.getWallet();
    this.broadcastManager = LocalBroadcastManager.getInstance(activity);
  }

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

    setRetainInstance(true);
  }

  @Override
  public void onResume()
  {
    super.onResume();

    broadcastManager.registerReceiver(broadcastReceiver, new IntentFilter(BlockchainService.ACTION_BLOCKCHAIN_STATE));
  }

  @Override
  public void onPause()
  {
    broadcastManager.unregisterReceiver(broadcastReceiver);

    super.onPause();
  }

  private final BroadcastReceiver broadcastReceiver = new BroadcastReceiver()
  {
    @Override
    public void onReceive(final Context context, final Intent broadcast)
    {
      final BlockchainState blockchainState = BlockchainState.fromIntent(broadcast);

      if (!dialogWasShown && !blockchainState.replaying && maintenanceRecommended())
      {
        MaintenanceDialogFragment.show(getFragmentManager());
        dialogWasShown = true;
      }
    }
  };

  private boolean maintenanceRecommended()
  {
    try
    {
      final ListenableFuture<List<Transaction>> result = wallet.doMaintenance(null, false);
      return !result.get().isEmpty();
    }
    catch (final DeterministicUpgradeRequiresPassword x)
    {
      return true;
    }
    catch (final Exception x)
    {
      throw new RuntimeException(x);
    }
  }
}

Java Source Code List

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