Android Open Source - neoscoin-wallet Transaction Activity

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License

The source code is released under:

GNU General Public License

Java Source Code

/*
 * Copyright 2011-2013 the original author or authors.
 *//from   w w  w . j a  v  a2  s  .c  om
 * 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.annotation.SuppressLint;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import com.actionbarsherlock.app.ActionBar;
import com.actionbarsherlock.view.MenuItem;
import com.google.bitcoin.core.*;
import de.schildbach.wallet.Constants;
import de.schildbach.wallet.WalletApplication;
import de.schildbach.wallet.util.Base43;
import katastrophos.neoscoin.wallet.R;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.zip.GZIPInputStream;

/**
 * @author Andreas Schildbach, Litecoin Dev Team
 */
public final class TransactionActivity extends AbstractWalletActivity
{
  public static final String INTENT_EXTRA_TRANSACTION_HASH = "transaction_hash";

  private static final String EXTRA_NDEF_MESSAGES = "android.nfc.extra.NDEF_MESSAGES"; // API level 10

  private Object nfcManager;
  private Transaction tx;

  public static void show(final Context context, final Transaction tx)
  {
    final Intent intent = new Intent(context, TransactionActivity.class);
    intent.putExtra(TransactionActivity.INTENT_EXTRA_TRANSACTION_HASH, tx.getHash());
    context.startActivity(intent);
  }

  @SuppressLint("InlinedApi")
  @Override
  protected void onCreate(final Bundle savedInstanceState)
  {
    super.onCreate(savedInstanceState);

    nfcManager = getSystemService(Context.NFC_SERVICE);

    setContentView(R.layout.transaction_content);


    final ActionBar actionBar = getSupportActionBar();
    actionBar.setDisplayHomeAsUpEnabled(true);

    handleIntent(getIntent());
  }

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

    updateView();
  }

  @Override
  public void onPause()
  {
    super.onPause();
  }

  private void handleIntent(final Intent intent)
  {
    final Uri intentUri = intent.getData();
    final String scheme = intentUri != null ? intentUri.getScheme() : null;

    if (intent.hasExtra(INTENT_EXTRA_TRANSACTION_HASH))
    {
      final Wallet wallet = ((WalletApplication) getApplication()).getWallet();
      tx = wallet.getTransaction((Sha256Hash) intent.getSerializableExtra(INTENT_EXTRA_TRANSACTION_HASH));
    }
    else if (intentUri != null && "ltctx".equals(scheme))
    {
      try
      {
        // decode transaction URI
        final String part = intentUri.getSchemeSpecificPart();
        final boolean useCompression = part.charAt(0) == 'Z';
        final byte[] bytes = Base43.decode(part.substring(1));

        InputStream is = new ByteArrayInputStream(bytes);
        if (useCompression)
          is = new GZIPInputStream(is);
        final ByteArrayOutputStream baos = new ByteArrayOutputStream();

        final byte[] buf = new byte[4096];
        int read;
        while (-1 != (read = is.read(buf)))
          baos.write(buf, 0, read);
        baos.close();
        is.close();

        tx = new Transaction(Constants.NETWORK_PARAMETERS, baos.toByteArray());

        processPendingTransaction(tx);
      }
      catch (final IOException x)
      {
        throw new RuntimeException(x);
      }
      catch (final ProtocolException x)
      {
        throw new RuntimeException(x);
      }
    }

    if (tx == null)
      throw new IllegalArgumentException("no tx");
  }

  @Override
  public boolean onOptionsItemSelected(final MenuItem item)
  {
    switch (item.getItemId())
    {
      case android.R.id.home:
        finish();
        return true;
    }

    return super.onOptionsItemSelected(item);
  }

  private void updateView()
  {
    final TransactionFragment transactionFragment = (TransactionFragment) getSupportFragmentManager().findFragmentById(R.id.transaction_fragment);

    transactionFragment.update(tx);
  }

  private void processPendingTransaction(final Transaction tx)
  {
    final Wallet wallet = ((WalletApplication) getApplication()).getWallet();

    try
    {
      if (wallet.isTransactionRelevant(tx))
        // TODO dependent transactions
        wallet.receivePending(tx, null);
    }
    catch (final VerificationException x)
    {
      throw new RuntimeException(x);
    }
  }
}

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