Android Open Source - bitfynd-wallet-android Transactions List Adapter

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License

The source code is released under:
GNU General Public License
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Java Source Code

/*
 * Copyright 2011-2014 the original author or authors.
 *//from   w ww  . j  av a 2s . 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.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.annotation.Nonnull;

import org.bitcoinj.core.Address;
import org.bitcoinj.core.Coin;
import org.bitcoinj.core.Sha256Hash;
import org.bitcoinj.core.Transaction;
import org.bitcoinj.core.Transaction.Purpose;
import org.bitcoinj.core.TransactionConfidence;
import org.bitcoinj.core.TransactionConfidence.ConfidenceType;
import org.bitcoinj.core.Wallet;
import org.bitcoinj.utils.MonetaryFormat;
import org.bitcoinj.wallet.DefaultCoinSelector;

import android.content.Context;
import android.content.res.Resources;
import android.graphics.Color;
import android.graphics.Typeface;
import android.text.Html;
import android.text.format.DateUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
import de.schildbach.wallet.AddressBookProvider;
import de.schildbach.wallet.Constants;
import de.schildbach.wallet.util.CircularProgressView;
import de.schildbach.wallet.util.WalletUtils;
import de.schildbach.wallet.R;

/**
 * @author Andreas Schildbach
 */
public class TransactionsListAdapter extends BaseAdapter
{
  private final Context context;
  private final LayoutInflater inflater;
  private final Wallet wallet;
  private final int maxConnectedPeers;

  private final List<Transaction> transactions = new ArrayList<Transaction>();
  private MonetaryFormat format;
  private boolean showEmptyText = false;
  private boolean showBackupWarning = false;

  private final int colorSignificant;
  private final int colorInsignificant;
  private final int colorError;
  private final int colorCircularBuilding = Color.parseColor("#44ff44");
  private final String textCoinBase;
  private final String textInternal;

  private final Map<String, String> labelCache = new HashMap<String, String>();
  private final static String CACHE_NULL_MARKER = "";

  private static final String CONFIDENCE_SYMBOL_DEAD = "\u271D"; // latin cross
  private static final String CONFIDENCE_SYMBOL_UNKNOWN = "?";

  private static final int VIEW_TYPE_TRANSACTION = 0;
  private static final int VIEW_TYPE_WARNING = 1;

  public TransactionsListAdapter(final Context context, @Nonnull final Wallet wallet, final int maxConnectedPeers, final boolean showBackupWarning)
  {
    this.context = context;
    inflater = LayoutInflater.from(context);

    this.wallet = wallet;
    this.maxConnectedPeers = maxConnectedPeers;
    this.showBackupWarning = showBackupWarning;

    final Resources resources = context.getResources();
    colorSignificant = resources.getColor(R.color.fg_significant);
    colorInsignificant = resources.getColor(R.color.fg_insignificant);
    colorError = resources.getColor(R.color.fg_error);
    textCoinBase = context.getString(R.string.wallet_transactions_fragment_coinbase);
    textInternal = context.getString(R.string.wallet_transactions_fragment_internal);
  }

  public void setFormat(final MonetaryFormat format)
  {
    this.format = format.noCode();

    notifyDataSetChanged();
  }

  public void clear()
  {
    transactions.clear();

    notifyDataSetChanged();
  }

  public void replace(@Nonnull final Transaction tx)
  {
    transactions.clear();
    transactions.add(tx);

    notifyDataSetChanged();
  }

  public void replace(@Nonnull final Collection<Transaction> transactions)
  {
    this.transactions.clear();
    this.transactions.addAll(transactions);

    showEmptyText = true;

    notifyDataSetChanged();
  }

  @Override
  public boolean isEmpty()
  {
    return showEmptyText && super.isEmpty();
  }

  @Override
  public int getCount()
  {
    int count = transactions.size();

    if (count == 1 && showBackupWarning)
      count++;

    return count;
  }

  @Override
  public Transaction getItem(final int position)
  {
    if (position == transactions.size() && showBackupWarning)
      return null;

    return transactions.get(position);
  }

  @Override
  public long getItemId(final int position)
  {
    if (position == transactions.size() && showBackupWarning)
      return 0;

    return WalletUtils.longHash(transactions.get(position).getHash());
  }

  @Override
  public int getViewTypeCount()
  {
    return 2;
  }

  @Override
  public int getItemViewType(final int position)
  {
    if (position == transactions.size() && showBackupWarning)
      return VIEW_TYPE_WARNING;
    else
      return VIEW_TYPE_TRANSACTION;
  }

  @Override
  public boolean hasStableIds()
  {
    return true;
  }

  @Override
  public View getView(final int position, View row, final ViewGroup parent)
  {
    final int type = getItemViewType(position);

    if (type == VIEW_TYPE_TRANSACTION)
    {
      if (row == null)
        row = inflater.inflate(R.layout.transaction_row_extended, null);

      final Transaction tx = getItem(position);
      bindView(row, tx);
    }
    else if (type == VIEW_TYPE_WARNING)
    {
      if (row == null)
        row = inflater.inflate(R.layout.transaction_row_warning, null);

      final TextView messageView = (TextView) row.findViewById(R.id.transaction_row_warning_message);
      messageView.setText(Html.fromHtml(context.getString(R.string.wallet_transactions_row_warning_backup)));
    }
    else
    {
      throw new IllegalStateException("unknown type: " + type);
    }

    return row;
  }

  private class TransactionCacheEntry
  {
    public TransactionCacheEntry(final Coin value, final boolean sent, final Address address)
    {
      this.value = value;
      this.sent = sent;
      this.address = address;
    }

    public final Coin value;
    public final boolean sent;
    public final Address address;
  }

  private Map<Sha256Hash, TransactionCacheEntry> transactionCache = new HashMap<Sha256Hash, TransactionCacheEntry>();

  public void bindView(@Nonnull final View row, @Nonnull final Transaction tx)
  {
    final TransactionConfidence confidence = tx.getConfidence();
    final ConfidenceType confidenceType = confidence.getConfidenceType();
    final boolean isOwn = confidence.getSource().equals(TransactionConfidence.Source.SELF);
    final boolean isCoinBase = tx.isCoinBase();
    final boolean isInternal = tx.getPurpose() == Purpose.KEY_ROTATION;
    final Coin fee = tx.getFee();
    final boolean hasFee = fee != null && !fee.isZero();

    TransactionCacheEntry txCache = transactionCache.get(tx.getHash());
    if (txCache == null)
    {
      final Coin value = tx.getValue(wallet);
      final boolean sent = value.signum() < 0;
      final Address address = sent ? WalletUtils.getWalletAddressOfReceived(tx, wallet) : WalletUtils.getFirstFromAddress(tx);
      txCache = new TransactionCacheEntry(value, sent, address);

      transactionCache.put(tx.getHash(), txCache);
    }

    final CircularProgressView rowConfidenceCircular = (CircularProgressView) row.findViewById(R.id.transaction_row_confidence_circular);
    final TextView rowConfidenceTextual = (TextView) row.findViewById(R.id.transaction_row_confidence_textual);

    // confidence
    if (confidenceType == ConfidenceType.PENDING)
    {
      rowConfidenceCircular.setVisibility(View.VISIBLE);
      rowConfidenceTextual.setVisibility(View.GONE);

      rowConfidenceCircular.setProgress(1);
      rowConfidenceCircular.setMaxProgress(1);
      rowConfidenceCircular.setSize(confidence.numBroadcastPeers());
      rowConfidenceCircular.setMaxSize(maxConnectedPeers / 2); // magic value
      rowConfidenceCircular.setColors(colorInsignificant, colorInsignificant);
    }
    else if (confidenceType == ConfidenceType.BUILDING)
    {
      rowConfidenceCircular.setVisibility(View.VISIBLE);
      rowConfidenceTextual.setVisibility(View.GONE);

      rowConfidenceCircular.setProgress(confidence.getDepthInBlocks());
      rowConfidenceCircular.setMaxProgress(isCoinBase ? Constants.NETWORK_PARAMETERS.getSpendableCoinbaseDepth()
          : Constants.MAX_NUM_CONFIRMATIONS);
      rowConfidenceCircular.setSize(1);
      rowConfidenceCircular.setMaxSize(1);
      rowConfidenceCircular.setColors(colorCircularBuilding, Color.DKGRAY);
    }
    else if (confidenceType == ConfidenceType.DEAD)
    {
      rowConfidenceCircular.setVisibility(View.GONE);
      rowConfidenceTextual.setVisibility(View.VISIBLE);

      rowConfidenceTextual.setText(CONFIDENCE_SYMBOL_DEAD);
      rowConfidenceTextual.setTextColor(Color.RED);
    }
    else
    {
      rowConfidenceCircular.setVisibility(View.GONE);
      rowConfidenceTextual.setVisibility(View.VISIBLE);

      rowConfidenceTextual.setText(CONFIDENCE_SYMBOL_UNKNOWN);
      rowConfidenceTextual.setTextColor(colorInsignificant);
    }

    // spendability
    final int textColor;
    if (confidenceType == ConfidenceType.DEAD)
      textColor = Color.RED;
    else
      textColor = DefaultCoinSelector.isSelectable(tx) ? colorSignificant : colorInsignificant;

    // time
    final TextView rowTime = (TextView) row.findViewById(R.id.transaction_row_time);
    if (rowTime != null)
    {
      final Date time = tx.getUpdateTime();
      rowTime.setText(time != null ? (DateUtils.getRelativeTimeSpanString(context, time.getTime())) : null);
      rowTime.setTextColor(textColor);
    }

    // receiving or sending
    final TextView rowFromTo = (TextView) row.findViewById(R.id.transaction_row_fromto);
    if (isInternal)
      rowFromTo.setText(R.string.symbol_internal);
    else if (txCache.sent)
      rowFromTo.setText(R.string.symbol_to);
    else
      rowFromTo.setText(R.string.symbol_from);
    rowFromTo.setTextColor(textColor);

    // coinbase
    final View rowCoinbase = row.findViewById(R.id.transaction_row_coinbase);
    rowCoinbase.setVisibility(isCoinBase ? View.VISIBLE : View.GONE);

    // address
    final TextView rowAddress = (TextView) row.findViewById(R.id.transaction_row_address);
    final String label;
    if (isCoinBase)
      label = textCoinBase;
    else if (isInternal)
      label = textInternal;
    else if (txCache.address != null)
      label = resolveLabel(txCache.address.toString());
    else
      label = "?";
    rowAddress.setTextColor(textColor);
    rowAddress.setText(label != null ? label : txCache.address.toString());
    rowAddress.setTypeface(label != null ? Typeface.DEFAULT : Typeface.MONOSPACE);

    // fee
    final View rowExtendFee = row.findViewById(R.id.transaction_row_extend_fee);
    if (rowExtendFee != null)
    {
      final CurrencyTextView rowFee = (CurrencyTextView) row.findViewById(R.id.transaction_row_fee);
      rowExtendFee.setVisibility(hasFee ? View.VISIBLE : View.GONE);
      rowFee.setAlwaysSigned(true);
      rowFee.setFormat(format);
      if (hasFee)
        rowFee.setAmount(fee.negate());
    }

    // value
    final CurrencyTextView rowValue = (CurrencyTextView) row.findViewById(R.id.transaction_row_value);
    rowValue.setTextColor(textColor);
    rowValue.setAlwaysSigned(true);
    rowValue.setFormat(format);
    rowValue.setAmount(hasFee && rowExtendFee != null ? txCache.value.add(fee) : txCache.value);

    // message
    final View rowExtendMessage = row.findViewById(R.id.transaction_row_extend_message);
    if (rowExtendMessage != null)
    {
      final TextView rowMessage = (TextView) row.findViewById(R.id.transaction_row_message);
      final boolean isTimeLocked = tx.isTimeLocked();
      rowExtendMessage.setVisibility(View.GONE);

      if (isInternal)
      {
        rowExtendMessage.setVisibility(View.VISIBLE);
        rowMessage.setText(Html.fromHtml(context.getString(R.string.transaction_row_message_purpose_key_rotation)));
        rowMessage.setTextColor(colorSignificant);
      }
      else if (isOwn && confidenceType == ConfidenceType.PENDING && confidence.numBroadcastPeers() == 0)
      {
        rowExtendMessage.setVisibility(View.VISIBLE);
        rowMessage.setText(R.string.transaction_row_message_own_unbroadcasted);
        rowMessage.setTextColor(colorInsignificant);
      }
      else if (!isOwn && confidenceType == ConfidenceType.PENDING && confidence.numBroadcastPeers() == 0)
      {
        rowExtendMessage.setVisibility(View.VISIBLE);
        rowMessage.setText(R.string.transaction_row_message_received_direct);
        rowMessage.setTextColor(colorInsignificant);
      }
      else if (!txCache.sent && txCache.value.compareTo(Transaction.MIN_NONDUST_OUTPUT) < 0)
      {
        rowExtendMessage.setVisibility(View.VISIBLE);
        rowMessage.setText(R.string.transaction_row_message_received_dust);
        rowMessage.setTextColor(colorInsignificant);
      }
      else if (!txCache.sent && confidenceType == ConfidenceType.PENDING && isTimeLocked)
      {
        rowExtendMessage.setVisibility(View.VISIBLE);
        rowMessage.setText(R.string.transaction_row_message_received_unconfirmed_locked);
        rowMessage.setTextColor(colorError);
      }
      else if (!txCache.sent && confidenceType == ConfidenceType.PENDING && !isTimeLocked)
      {
        rowExtendMessage.setVisibility(View.VISIBLE);
        rowMessage.setText(R.string.transaction_row_message_received_unconfirmed_unlocked);
        rowMessage.setTextColor(colorInsignificant);
      }
      else if (!txCache.sent && confidenceType == ConfidenceType.DEAD)
      {
        rowExtendMessage.setVisibility(View.VISIBLE);
        rowMessage.setText(R.string.transaction_row_message_received_dead);
        rowMessage.setTextColor(colorError);
      }
      else if (!txCache.sent && tx.getOutputs().size() > 20)
      {
        rowExtendMessage.setVisibility(View.VISIBLE);
        rowMessage.setText(R.string.transaction_row_message_received_pay_to_many);
        rowMessage.setTextColor(colorInsignificant);
      }
      else if (tx.getMemo() != null)
      {
        rowExtendMessage.setVisibility(View.VISIBLE);
        rowMessage.setText(tx.getMemo());
        rowMessage.setTextColor(colorInsignificant);
      }
    }
  }

  private String resolveLabel(@Nonnull final String address)
  {
    final String cachedLabel = labelCache.get(address);
    if (cachedLabel == null)
    {
      final String label = AddressBookProvider.resolveLabel(context, address);
      if (label != null)
        labelCache.put(address, label);
      else
        labelCache.put(address, CACHE_NULL_MARKER);
      return label;
    }
    else
    {
      return cachedLabel != CACHE_NULL_MARKER ? cachedLabel : null;
    }
  }

  public void clearLabelCache()
  {
    labelCache.clear();

    notifyDataSetChanged();
  }
}
Java Source Code List
