Java tutorial
/* * Copyright 2011-2013 the original author or authors. * * 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.io.ByteArrayOutputStream; import java.io.IOException; import java.math.BigInteger; import java.text.DateFormat; import java.util.Date; import java.util.Locale; import java.util.zip.GZIPOutputStream; import android.app.Activity; import android.content.ContentResolver; import android.graphics.Bitmap; import android.graphics.Typeface; import android.os.Bundle; import android.support.v4.app.FragmentActivity; import android.text.format.DateUtils; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.ImageView; import android.widget.TextView; import com.actionbarsherlock.app.SherlockFragment; import com.google.bitcoin.core.Address; import com.google.bitcoin.core.ScriptException; import com.google.bitcoin.core.Transaction; import com.google.bitcoin.core.TransactionConfidence.ConfidenceType; import com.google.bitcoin.core.Wallet; import de.schildbach.wallet.AddressBookProvider; import de.schildbach.wallet.Constants; import de.schildbach.wallet.WalletApplication; import de.schildbach.wallet.util.Base43; import de.schildbach.wallet.util.BitmapFragment; import de.schildbach.wallet.util.WalletUtils; import de.schildbach.wallet_test.R; /** * @author Andreas Schildbach */ public final class TransactionFragment extends SherlockFragment { public static final String FRAGMENT_TAG = TransactionFragment.class.getName(); private FragmentActivity activity; private DateFormat dateFormat; private DateFormat timeFormat; @Override public void onAttach(final Activity activity) { super.onAttach(activity); this.activity = (FragmentActivity) activity; dateFormat = android.text.format.DateFormat.getDateFormat(activity); timeFormat = android.text.format.DateFormat.getTimeFormat(activity); } @Override public View onCreateView(final LayoutInflater inflater, final ViewGroup container, final Bundle savedInstanceState) { return inflater.inflate(R.layout.transaction_fragment, null); } public void update(final Transaction tx) { final Wallet wallet = ((WalletApplication) activity.getApplication()).getWallet(); final byte[] serializedTx = tx.unsafeBitcoinSerialize(); Address from = null; boolean fromMine = false; try { from = tx.getInputs().get(0).getFromAddress(); fromMine = wallet.isPubKeyHashMine(from.getHash160()); } catch (final ScriptException x) { x.printStackTrace(); } Address to = null; boolean toMine = false; try { to = tx.getOutputs().get(0).getScriptPubKey().getToAddress(); toMine = wallet.isPubKeyHashMine(to.getHash160()); } catch (final ScriptException x) { x.printStackTrace(); } final ContentResolver contentResolver = activity.getContentResolver(); final View view = getView(); final Date time = tx.getUpdateTime(); view.findViewById(R.id.transaction_fragment_time_row) .setVisibility(time != null ? View.VISIBLE : View.GONE); if (time != null) { final TextView viewDate = (TextView) view.findViewById(R.id.transaction_fragment_time); viewDate.setText( (DateUtils.isToday(time.getTime()) ? getString(R.string.time_today) : dateFormat.format(time)) + ", " + timeFormat.format(time)); } try { final BigInteger amountSent = tx.getValueSentFromMe(wallet); view.findViewById(R.id.transaction_fragment_amount_sent_row) .setVisibility(amountSent.signum() != 0 ? View.VISIBLE : View.GONE); if (amountSent.signum() != 0) { final TextView viewAmountSent = (TextView) view.findViewById(R.id.transaction_fragment_amount_sent); viewAmountSent.setText(Constants.CURRENCY_MINUS_SIGN + WalletUtils.formatValue(amountSent)); } } catch (final ScriptException x) { x.printStackTrace(); } final BigInteger amountReceived = tx.getValueSentToMe(wallet); view.findViewById(R.id.transaction_fragment_amount_received_row) .setVisibility(amountReceived.signum() != 0 ? View.VISIBLE : View.GONE); if (amountReceived.signum() != 0) { final TextView viewAmountReceived = (TextView) view .findViewById(R.id.transaction_fragment_amount_received); viewAmountReceived.setText(Constants.CURRENCY_PLUS_SIGN + WalletUtils.formatValue(amountReceived)); } final View viewFromButton = view.findViewById(R.id.transaction_fragment_from_button); final TextView viewFromLabel = (TextView) view.findViewById(R.id.transaction_fragment_from_label); if (from != null) { final String label = AddressBookProvider.resolveLabel(contentResolver, from.toString()); final StringBuilder builder = new StringBuilder(); if (fromMine) builder.append(getString(R.string.transaction_fragment_you)).append(", "); if (label != null) { builder.append(label); } else { builder.append(from.toString()); viewFromLabel.setTypeface(Typeface.MONOSPACE); } viewFromLabel.setText(builder.toString()); final String addressStr = from.toString(); viewFromButton.setOnClickListener(new OnClickListener() { public void onClick(final View v) { EditAddressBookEntryFragment.edit(getFragmentManager(), addressStr); } }); } else { viewFromLabel.setText(null); } final View viewToButton = view.findViewById(R.id.transaction_fragment_to_button); final TextView viewToLabel = (TextView) view.findViewById(R.id.transaction_fragment_to_label); if (to != null) { final String label = AddressBookProvider.resolveLabel(contentResolver, to.toString()); final StringBuilder builder = new StringBuilder(); if (toMine) builder.append(getString(R.string.transaction_fragment_you)).append(", "); if (label != null) { builder.append(label); } else { builder.append(to.toString()); viewToLabel.setTypeface(Typeface.MONOSPACE); } viewToLabel.setText(builder.toString()); final String addressStr = to.toString(); viewToButton.setOnClickListener(new OnClickListener() { public void onClick(final View v) { EditAddressBookEntryFragment.edit(getFragmentManager(), addressStr); } }); } else { viewToLabel.setText(null); } final TextView viewStatus = (TextView) view.findViewById(R.id.transaction_fragment_status); final ConfidenceType confidenceType = tx.getConfidence().getConfidenceType(); if (confidenceType == ConfidenceType.DEAD || confidenceType == ConfidenceType.NOT_IN_BEST_CHAIN) viewStatus.setText(R.string.transaction_fragment_status_dead); else if (confidenceType == ConfidenceType.NOT_SEEN_IN_CHAIN) viewStatus.setText(R.string.transaction_fragment_status_pending); else if (confidenceType == ConfidenceType.BUILDING) viewStatus.setText(R.string.transaction_fragment_status_confirmed); else viewStatus.setText(R.string.transaction_fragment_status_unknown); final TextView viewHash = (TextView) view.findViewById(R.id.transaction_fragment_hash); viewHash.setText(tx.getHash().toString()); final TextView viewLength = (TextView) view.findViewById(R.id.transaction_fragment_length); viewLength.setText(Integer.toString(serializedTx.length)); final ImageView viewQr = (ImageView) view.findViewById(R.id.transaction_fragment_qr); try { // encode transaction URI final ByteArrayOutputStream bos = new ByteArrayOutputStream(serializedTx.length); final GZIPOutputStream gos = new GZIPOutputStream(bos); gos.write(serializedTx); gos.close(); final byte[] gzippedSerializedTx = bos.toByteArray(); final boolean useCompressioon = gzippedSerializedTx.length < serializedTx.length; final StringBuilder txStr = new StringBuilder("btctx:"); txStr.append(useCompressioon ? 'Z' : '-'); txStr.append(Base43.encode(useCompressioon ? gzippedSerializedTx : serializedTx)); final Bitmap qrCodeBitmap = WalletUtils.getQRCodeBitmap(txStr.toString().toUpperCase(Locale.US), 512); viewQr.setImageBitmap(qrCodeBitmap); viewQr.setOnClickListener(new OnClickListener() { public void onClick(final View v) { BitmapFragment.show(getFragmentManager(), qrCodeBitmap); } }); } catch (final IOException x) { throw new RuntimeException(x); } } }