Android Open Source - My-Wallet-Android Transaction Activity

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License

The source code is released under:

GNU General Public License

Java Source Code

/*
 * Copyright 2011-2012 the original author or authors.
 */*from w  w w  .ja v  a 2s. 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 piuk.blockchain.android.ui;

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

import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;

import com.google.bitcoin.core.ProtocolException;
import com.google.bitcoin.core.ScriptException;
import com.google.bitcoin.core.Transaction;
import com.google.bitcoin.core.VerificationException;
import com.google.bitcoin.core.Wallet;

import piuk.blockchain.R;
import piuk.blockchain.android.Constants;
import piuk.blockchain.android.WalletApplication;
import piuk.blockchain.android.util.ActionBarFragment;
import piuk.blockchain.android.util.Base43;
import piuk.blockchain.android.util.NfcTools;

/**
 * @author Andreas Schildbach
 */
public final class TransactionActivity extends AbstractWalletActivity
{
  public static final String INTENT_EXTRA_TRANSACTION = "transaction";

  private static final int GINGERBREAD_MR1 = 10; // API level 10
  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);
    // use Bitcoin serialization, because Java serialization runs out of stack on some transactions
    intent.putExtra(TransactionActivity.INTENT_EXTRA_TRANSACTION, tx);
    
    context.startActivity(intent);
  }

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

    nfcManager = getSystemService(Context.NFC_SERVICE);

    setContentView(R.layout.transaction_content);

    final ActionBarFragment actionBar = getActionBar();

    actionBar.setPrimaryTitle(R.string.transaction_activity_title);

    actionBar.setBack(new OnClickListener()
    {
      public void onClick(final View v)
      {
        finish();
      }
    });

    handleIntent(getIntent());
  }

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

    updateView();
  }

  @Override
  public void onPause()
  {
    if (nfcManager != null)
      NfcTools.unpublish(nfcManager, this);

    super.onPause();
  }

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

    if (intent.hasExtra(INTENT_EXTRA_TRANSACTION))
    {
      tx = (Transaction) intent.getSerializableExtra(INTENT_EXTRA_TRANSACTION);
    }
    else if (intentUri != null && "btctx".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);
      }
    }
    else if (Build.VERSION.SDK_INT >= GINGERBREAD_MR1 && Constants.MIMETYPE_TRANSACTION.equals(intent.getType()))
    {
      final Object ndefMessage = intent.getParcelableArrayExtra(EXTRA_NDEF_MESSAGES)[0];
      final byte[] payload = NfcTools.extractMimePayload(Constants.MIMETYPE_TRANSACTION, ndefMessage);

      try
      {
        tx = new Transaction(Constants.NETWORK_PARAMETERS, payload);

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

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

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

    transactionFragment.update(tx);

    if (nfcManager != null)
      NfcTools.publishMimeObject(nfcManager, this, Constants.MIMETYPE_TRANSACTION, tx.unsafeBitcoinSerialize(), false);
  }

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

    try
    {
      wallet.receivePending(tx);
    }
    catch (final VerificationException x)
    {
      throw new RuntimeException(x);
    }
    catch (final ScriptException x)
    {
      throw new RuntimeException(x);
    }
  }
}

Java Source Code List

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