Android Open Source - templecoin-android-wallet Send Bluetooth Task

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License

The source code is released under:

GNU General Public License

Java Source Code

/*
 * Copyright 2013-2014 the original author or authors.
 */*w w w.jav  a  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.offline;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;

import javax.annotation.Nonnull;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.os.Handler;
import android.os.Looper;

import com.google.bitcoin.core.Transaction;

import de.schildbach.wallet.util.Bluetooth;

/**
 * @author Andreas Schildbach
 */
public abstract class SendBluetoothTask
{
  private final BluetoothAdapter bluetoothAdapter;
  private Handler backgroundHandler;
  private final Handler callbackHandler;

  private static final Logger log = LoggerFactory.getLogger(SendBluetoothTask.class);

  public SendBluetoothTask(@Nonnull final BluetoothAdapter bluetoothAdapter, @Nonnull final Handler backgroundHandler)
  {
    this.bluetoothAdapter = bluetoothAdapter;
    this.backgroundHandler = backgroundHandler;
    this.callbackHandler = new Handler(Looper.myLooper());
  }

  public void send(@Nonnull final String bluetoothMac, @Nonnull final Transaction transaction)
  {
    backgroundHandler.post(new Runnable()
    {
      @Override
      public void run()
      {
        log.info("trying to send tx " + transaction.getHashAsString() + " via bluetooth");

        final byte[] serializedTx = transaction.unsafeBitcoinSerialize();

        BluetoothSocket socket = null;
        DataOutputStream os = null;
        DataInputStream is = null;

        try
        {
          final BluetoothDevice device = bluetoothAdapter.getRemoteDevice(Bluetooth.decompressMac(bluetoothMac));
          socket = device.createInsecureRfcommSocketToServiceRecord(Bluetooth.BLUETOOTH_UUID);

          socket.connect();
          is = new DataInputStream(socket.getInputStream());
          os = new DataOutputStream(socket.getOutputStream());

          os.writeInt(1);
          os.writeInt(serializedTx.length);
          os.write(serializedTx);
          os.flush();

          log.info("tx " + transaction.getHashAsString() + " sent via bluetooth");

          final boolean ack = is.readBoolean();

          log.info("received " + (ack ? "ack" : "nack"));

          callbackHandler.post(new Runnable()
          {
            @Override
            public void run()
            {
              onResult(ack);
            }
          });
        }
        catch (final IOException x)
        {
          log.info("problem sending", x);
        }
        finally
        {
          if (os != null)
          {
            try
            {
              os.close();
            }
            catch (final IOException x)
            {
              // swallow
            }
          }

          if (is != null)
          {
            try
            {
              is.close();
            }
            catch (final IOException x)
            {
              // swallow
            }
          }

          if (socket != null)
          {
            try
            {
              socket.close();
            }
            catch (final IOException x)
            {
              // swallow
            }
          }
        }
      }
    });
  }

  protected abstract void onResult(boolean ack);
}

Java Source Code List

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