Android Open Source - My-Wallet-Android Send Coins 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 ww  w.j  a va  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 piuk.blockchain.android.ui;

import java.math.BigInteger;
import java.util.HashMap;
import java.util.Map;

import org.apache.commons.lang.ArrayUtils;

import android.app.Dialog;
import android.content.Intent;
import android.net.Uri;
import android.nfc.NfcAdapter;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.webkit.WebView;

import com.google.bitcoin.core.Address;
import com.google.bitcoin.core.Base58;
import com.google.bitcoin.core.ECKey;

import piuk.BitcoinAddress;
import piuk.BitcoinURI;

import com.google.bitcoin.uri.BitcoinURIParseException;

import piuk.blockchain.R;
import piuk.blockchain.android.Constants;
import piuk.blockchain.android.util.ActionBarFragment;

/**
 * @author Andreas Schildbach
 */
public final class SendCoinsActivity extends AbstractWalletActivity
{
  public static final String INTENT_EXTRA_ADDRESS = "address";
  private static final String INTENT_EXTRA_QUERY = "query";
  private static final int DIALOG_HELP = 0;
  final Map<String, ECKey> temporaryPrivateKeys = new HashMap<String, ECKey>();
  private static final int REQUEST_CODE_SCAN = 0;
  public String scanPrivateKeyAddress = null;

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

    getWalletApplication().connect();
  }

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

    getWalletApplication().diconnectSoon();
  }

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

    setContentView(R.layout.send_coins_content);

    final ActionBarFragment actionBar = getActionBar();

    actionBar.setPrimaryTitle(R.string.send_coins_activity_title);

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

    actionBar.addButton(R.drawable.ic_action_qr).setOnClickListener(new OnClickListener()
    {
      public void onClick(final View v)
      {
        showQRReader();
      }
    });
    actionBar.addButton(R.drawable.ic_action_help).setOnClickListener(new OnClickListener()
    {
      public void onClick(final View v)
      {
        showDialog(DIALOG_HELP);
      }
    });

    handleIntent(getIntent());
  }

  public void showQRReader() {
    if (getPackageManager().resolveActivity(Constants.INTENT_QR_SCANNER, 0) != null)
    {
      startActivityForResult(Constants.INTENT_QR_SCANNER, REQUEST_CODE_SCAN);
    }
    else
    {
      showMarketPage(Constants.PACKAGE_NAME_ZXING);
      longToast(R.string.send_coins_install_qr_scanner_msg);
    }
  }

  @Override
  protected void onNewIntent(final Intent intent)
  {
    handleIntent(intent);
  }

  @Override
  protected Dialog onCreateDialog(final int id)
  {
    final WebView webView = new WebView(this);
    webView.loadUrl("file:///android_asset/help_send_coins" + languagePrefix() + ".html");

    final Dialog dialog = new Dialog(this);
    dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
    dialog.setContentView(webView);
    dialog.setCanceledOnTouchOutside(true);

    return dialog;
  }

  @Override
  public void onActivityResult(final int requestCode, final int resultCode, final Intent intent)
  {
    if (requestCode == REQUEST_CODE_SCAN && resultCode == RESULT_OK && "QR_CODE".equals(intent.getStringExtra("SCAN_RESULT_FORMAT")))
    {
      final String contents = intent.getStringExtra("SCAN_RESULT");
      if (contents.matches("[a-zA-Z0-9]*"))
      {
        System.out.println("Scan address " + scanPrivateKeyAddress);

        if (scanPrivateKeyAddress != null) {

          try {
            
            byte[] privBytes = Base58.decode(contents);
                        
            //Prppend a zero byte to make the biginteger unsigned
            byte[] appendZeroByte = ArrayUtils.addAll(new byte[1], privBytes);

            ECKey ecKey = new ECKey(new BigInteger(appendZeroByte));
            
            if (ecKey.toAddress(Constants.NETWORK_PARAMETERS).toString().equals(scanPrivateKeyAddress)) {
              temporaryPrivateKeys.put(scanPrivateKeyAddress, ecKey);
            } else {              
              longToast(getString(R.string.wrong_private_key, ecKey.toAddress(Constants.NETWORK_PARAMETERS).toString()));
            }
            
          } catch (Exception e) {
            e.printStackTrace();
          }

        } else {
          updateSendCoinsFragment(contents, null);          
        }
      }
      else
      {
          try
          {

            final BitcoinURI bitcoinUri = new BitcoinURI(contents);
            final BitcoinAddress address = bitcoinUri.getAddress();

            updateSendCoinsFragment(address != null ? address.toString() : null, bitcoinUri.getAmount());

          }
          catch (final BitcoinURIParseException x)
          {
            errorDialog(R.string.send_coins_uri_parse_error_title, contents);
          } 
        }
    }
    

    synchronized (temporaryPrivateKeys) {
      temporaryPrivateKeys.notify();
    }
    
    scanPrivateKeyAddress = null;
  }

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

    final String address;
    final BigInteger amount;

    if ((Intent.ACTION_VIEW.equals(action) || NfcAdapter.ACTION_NDEF_DISCOVERED.equals(action)) && intentUri != null && "bitcoin".equals(scheme))
    {
      try
      {
        final BitcoinURI bitcoinUri = new BitcoinURI(intentUri.toString());
        address = bitcoinUri.getAddress().toString();
        amount = bitcoinUri.getAmount();
      }
      catch (final BitcoinURIParseException x)
      {
        errorDialog(R.string.send_coins_uri_parse_error_title, intentUri.toString());
        return;
      }
    }
    else if (Intent.ACTION_WEB_SEARCH.equals(action) && intent.hasExtra(INTENT_EXTRA_QUERY))
    {
      try
      {
        final BitcoinURI bitcoinUri = new BitcoinURI(intent.getStringExtra(INTENT_EXTRA_QUERY));
        address = bitcoinUri.getAddress().toString();
        amount = bitcoinUri.getAmount();
      }
      catch (final BitcoinURIParseException x)
      {
        errorDialog(R.string.send_coins_uri_parse_error_title, intentUri.toString());
        return;
      }
    }
    else if (intent.hasExtra(INTENT_EXTRA_ADDRESS))
    {
      address = intent.getStringExtra(INTENT_EXTRA_ADDRESS);
      amount = null;
    }
    else
    {
      return;
    }

    if (address != null || amount != null)
      updateSendCoinsFragment(address, amount);
    else
      longToast(R.string.send_coins_parse_address_error_msg);
  }

  private void updateSendCoinsFragment(final String address, final BigInteger amount)
  {
    final SendCoinsFragment sendCoinsFragment = (SendCoinsFragment) getSupportFragmentManager().findFragmentById(R.id.send_coins_fragment);

    sendCoinsFragment.update(address, amount);
  }
}

Java Source Code List

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