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 net.usecredits.wallet.ui; import java.math.BigInteger; import javax.annotation.CheckForNull; import javax.annotation.Nonnull; import javax.annotation.Nullable; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import android.app.Activity; import android.bluetooth.BluetoothAdapter; import android.content.ContentResolver; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.content.SharedPreferences; import android.content.pm.PackageManager; import android.database.ContentObserver; import android.database.Cursor; import android.media.RingtoneManager; import android.net.Uri; import android.nfc.NfcAdapter; import android.os.Bundle; import android.os.Handler; import android.os.HandlerThread; import android.os.Process; import android.preference.PreferenceManager; import android.support.v4.app.LoaderManager; import android.support.v4.app.LoaderManager.LoaderCallbacks; import android.support.v4.content.Loader; import android.text.Editable; import android.text.TextWatcher; import android.view.LayoutInflater; import android.view.View; import android.view.View.MeasureSpec; import android.view.View.OnClickListener; import android.view.View.OnFocusChangeListener; import android.view.ViewGroup; import android.widget.AutoCompleteTextView; import android.widget.Button; import android.widget.CheckBox; import android.widget.CompoundButton; import android.widget.CompoundButton.OnCheckedChangeListener; import android.widget.CursorAdapter; import android.widget.ListView; import android.widget.PopupWindow; import android.widget.TextView; import com.actionbarsherlock.app.SherlockFragment; import com.actionbarsherlock.view.ActionMode; import com.actionbarsherlock.view.Menu; import com.actionbarsherlock.view.MenuInflater; import com.actionbarsherlock.view.MenuItem; import com.google.bitcoin.core.Address; import com.google.bitcoin.core.AddressFormatException; import com.google.bitcoin.core.NetworkParameters; import com.google.bitcoin.core.Sha256Hash; import com.google.bitcoin.core.Transaction; import com.google.bitcoin.core.TransactionConfidence; import com.google.bitcoin.core.TransactionConfidence.ConfidenceType; import com.google.bitcoin.core.Wallet; import com.google.bitcoin.core.Wallet.BalanceType; import com.google.bitcoin.core.Wallet.SendRequest; import net.usecredits.wallet.AddressBookProvider; import net.usecredits.wallet.Constants; import net.usecredits.wallet.ExchangeRatesProvider; import net.usecredits.wallet.ExchangeRatesProvider.ExchangeRate; import net.usecredits.wallet.WalletApplication; import net.usecredits.wallet.integration.android.BitcoinIntegration; import net.usecredits.wallet.offline.SendBluetoothTask; import net.usecredits.wallet.ui.InputParser.StringInputParser; import net.usecredits.wallet.util.GenericUtils; import net.usecredits.wallet.util.WalletUtils; import net.usecredits.wallet_test.R; /** * @author Andreas Schildbach */ public final class SendCoinsFragment extends SherlockFragment { private AbstractBindServiceActivity activity; private WalletApplication application; private Wallet wallet; private ContentResolver contentResolver; private LoaderManager loaderManager; private SharedPreferences prefs; @CheckForNull private BluetoothAdapter bluetoothAdapter; private int btcPrecision; private int btcShift; private final Handler handler = new Handler(); private HandlerThread backgroundThread; private Handler backgroundHandler; private AutoCompleteTextView receivingAddressView; private View receivingStaticView; private TextView receivingStaticAddressView; private TextView receivingStaticLabelView; private CheckBox bluetoothEnableView; private TextView bluetoothMessageView; private ListView sentTransactionView; private TransactionsListAdapter sentTransactionListAdapter; private Button viewGo; private Button viewCancel; private TextView popupMessageView; private View popupAvailableView; private PopupWindow popupWindow; private CurrencyCalculatorLink amountCalculatorLink; private MenuItem scanAction; private AddressAndLabel validatedAddress = null; private boolean isValidAmounts = false; @CheckForNull private String bluetoothMac; private Boolean bluetoothAck = null; private State state = State.INPUT; private Transaction sentTransaction = null; private static final int ID_RATE_LOADER = 0; private static final int REQUEST_CODE_SCAN = 0; private static final int REQUEST_CODE_ENABLE_BLUETOOTH = 1; private static final Logger log = LoggerFactory.getLogger(SendCoinsFragment.class); private enum State { INPUT, PREPARATION, SENDING, SENT, FAILED } private final class ReceivingAddressListener implements OnFocusChangeListener, TextWatcher { @Override public void onFocusChange(final View v, final boolean hasFocus) { if (!hasFocus) validateReceivingAddress(true); } @Override public void afterTextChanged(final Editable s) { dismissPopup(); validateReceivingAddress(false); } @Override public void beforeTextChanged(final CharSequence s, final int start, final int count, final int after) { } @Override public void onTextChanged(final CharSequence s, final int start, final int before, final int count) { } } private final ReceivingAddressListener receivingAddressListener = new ReceivingAddressListener(); private final class ReceivingAddressActionMode implements ActionMode.Callback { @Override public boolean onCreateActionMode(final ActionMode mode, final Menu menu) { final MenuInflater inflater = mode.getMenuInflater(); inflater.inflate(R.menu.send_coins_address_context, menu); return true; } @Override public boolean onPrepareActionMode(final ActionMode mode, final Menu menu) { return false; } @Override public boolean onActionItemClicked(final ActionMode mode, final MenuItem item) { switch (item.getItemId()) { case R.id.send_coins_address_context_edit_address: handleEditAddress(); mode.finish(); return true; case R.id.send_coins_address_context_clear: handleClear(); mode.finish(); return true; } return false; } @Override public void onDestroyActionMode(final ActionMode mode) { if (receivingStaticView.hasFocus()) amountCalculatorLink.requestFocus(); } private void handleEditAddress() { EditAddressBookEntryFragment.edit(getFragmentManager(), validatedAddress.address.toString()); } private void handleClear() { // switch from static to input validatedAddress = null; receivingAddressView.setText(null); receivingStaticAddressView.setText(null); updateView(); receivingAddressView.requestFocus(); } } private final CurrencyAmountView.Listener amountsListener = new CurrencyAmountView.Listener() { @Override public void changed() { dismissPopup(); validateAmounts(false); } @Override public void done() { validateAmounts(true); viewGo.requestFocusFromTouch(); } @Override public void focusChanged(final boolean hasFocus) { if (!hasFocus) { validateAmounts(true); } } }; private final ContentObserver contentObserver = new ContentObserver(handler) { @Override public void onChange(final boolean selfChange) { updateView(); } }; private final TransactionConfidence.Listener sentTransactionConfidenceListener = new TransactionConfidence.Listener() { @Override public void onConfidenceChanged(final Transaction tx, final TransactionConfidence.Listener.ChangeReason reason) { activity.runOnUiThread(new Runnable() { @Override public void run() { sentTransactionListAdapter.notifyDataSetChanged(); final TransactionConfidence confidence = sentTransaction.getConfidence(); final ConfidenceType confidenceType = confidence.getConfidenceType(); final int numBroadcastPeers = confidence.numBroadcastPeers(); if (state == State.SENDING) { if (confidenceType == ConfidenceType.DEAD) state = State.FAILED; else if (numBroadcastPeers > 1 || confidenceType == ConfidenceType.BUILDING) state = State.SENT; updateView(); } if (reason == ChangeReason.SEEN_PEERS && confidenceType == ConfidenceType.PENDING) { // play sound effect final int soundResId = getResources().getIdentifier( "send_coins_broadcast_" + numBroadcastPeers, "raw", activity.getPackageName()); if (soundResId > 0) RingtoneManager .getRingtone(activity, Uri.parse( "android.resource://" + activity.getPackageName() + "/" + soundResId)) .play(); } } }); } }; private final LoaderCallbacks<Cursor> rateLoaderCallbacks = new LoaderManager.LoaderCallbacks<Cursor>() { @Override public Loader<Cursor> onCreateLoader(final int id, final Bundle args) { return new ExchangeRateLoader(activity); } @Override public void onLoadFinished(final Loader<Cursor> loader, final Cursor data) { if (data != null) { data.moveToFirst(); final ExchangeRate exchangeRate = ExchangeRatesProvider.getExchangeRate(data); if (state == State.INPUT) amountCalculatorLink.setExchangeRate(exchangeRate); } } @Override public void onLoaderReset(final Loader<Cursor> loader) { } }; @Override public void onAttach(final Activity activity) { super.onAttach(activity); this.activity = (AbstractBindServiceActivity) activity; this.application = (WalletApplication) activity.getApplication(); this.prefs = PreferenceManager.getDefaultSharedPreferences(activity); this.wallet = application.getWallet(); this.contentResolver = activity.getContentResolver(); this.loaderManager = getLoaderManager(); } @Override public void onCreate(final Bundle savedInstanceState) { super.onCreate(savedInstanceState); setHasOptionsMenu(true); bluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); backgroundThread = new HandlerThread("backgroundThread", Process.THREAD_PRIORITY_BACKGROUND); backgroundThread.start(); backgroundHandler = new Handler(backgroundThread.getLooper()); final String precision = prefs.getString(Constants.PREFS_KEY_BTC_PRECISION, Constants.PREFS_DEFAULT_BTC_PRECISION); btcPrecision = precision.charAt(0) - '0'; btcShift = precision.length() == 3 ? precision.charAt(2) - '0' : 0; } @Override public View onCreateView(final LayoutInflater inflater, final ViewGroup container, final Bundle savedInstanceState) { final View view = inflater.inflate(R.layout.send_coins_fragment, container); receivingAddressView = (AutoCompleteTextView) view.findViewById(R.id.send_coins_receiving_address); receivingAddressView.setAdapter(new AutoCompleteAddressAdapter(activity, null)); receivingAddressView.setOnFocusChangeListener(receivingAddressListener); receivingAddressView.addTextChangedListener(receivingAddressListener); receivingStaticView = view.findViewById(R.id.send_coins_receiving_static); receivingStaticAddressView = (TextView) view.findViewById(R.id.send_coins_receiving_static_address); receivingStaticLabelView = (TextView) view.findViewById(R.id.send_coins_receiving_static_label); receivingStaticView.setOnFocusChangeListener(new OnFocusChangeListener() { private ActionMode actionMode; @Override public void onFocusChange(final View v, final boolean hasFocus) { if (hasFocus) actionMode = activity.startActionMode(new ReceivingAddressActionMode()); else actionMode.finish(); } }); final CurrencyAmountView btcAmountView = (CurrencyAmountView) view.findViewById(R.id.send_coins_amount_btc); btcAmountView.setCurrencySymbol(btcShift == 0 ? Constants.CURRENCY_CODE_BTC : Constants.CURRENCY_CODE_MBTC); btcAmountView.setInputPrecision(btcShift == 0 ? Constants.BTC_MAX_PRECISION : Constants.MBTC_MAX_PRECISION); btcAmountView.setHintPrecision(btcPrecision); btcAmountView.setShift(btcShift); final CurrencyAmountView localAmountView = (CurrencyAmountView) view .findViewById(R.id.send_coins_amount_local); localAmountView.setInputPrecision(Constants.LOCAL_PRECISION); localAmountView.setHintPrecision(Constants.LOCAL_PRECISION); amountCalculatorLink = new CurrencyCalculatorLink(btcAmountView, localAmountView); bluetoothEnableView = (CheckBox) view.findViewById(R.id.send_coins_bluetooth_enable); bluetoothEnableView.setChecked(bluetoothAdapter != null && bluetoothAdapter.isEnabled()); bluetoothEnableView.setOnCheckedChangeListener(new OnCheckedChangeListener() { @Override public void onCheckedChanged(final CompoundButton buttonView, final boolean isChecked) { if (isChecked && !bluetoothAdapter.isEnabled()) { // try to enable bluetooth startActivityForResult(new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE), REQUEST_CODE_ENABLE_BLUETOOTH); } } }); bluetoothMessageView = (TextView) view.findViewById(R.id.send_coins_bluetooth_message); sentTransactionView = (ListView) view.findViewById(R.id.send_coins_sent_transaction); sentTransactionListAdapter = new TransactionsListAdapter(activity, wallet, application.maxConnectedPeers(), false); sentTransactionView.setAdapter(sentTransactionListAdapter); viewGo = (Button) view.findViewById(R.id.send_coins_go); viewGo.setOnClickListener(new OnClickListener() { @Override public void onClick(final View v) { validateReceivingAddress(true); validateAmounts(true); if (everythingValid()) handleGo(); } }); viewCancel = (Button) view.findViewById(R.id.send_coins_cancel); viewCancel.setOnClickListener(new OnClickListener() { @Override public void onClick(final View v) { if (state == State.INPUT) activity.setResult(Activity.RESULT_CANCELED); activity.finish(); } }); popupMessageView = (TextView) inflater.inflate(R.layout.send_coins_popup_message, container); popupAvailableView = inflater.inflate(R.layout.send_coins_popup_available, container); if (savedInstanceState != null) { restoreInstanceState(savedInstanceState); } else { final Intent intent = activity.getIntent(); final String action = intent.getAction(); final Uri intentUri = intent.getData(); final String scheme = intentUri != null ? intentUri.getScheme() : null; if ((Intent.ACTION_VIEW.equals(action) || NfcAdapter.ACTION_NDEF_DISCOVERED.equals(action)) && intentUri != null && "bitcoin".equals(scheme)) initStateFromBitcoinUri(intentUri); else if (intent.hasExtra(SendCoinsActivity.INTENT_EXTRA_ADDRESS)) initStateFromIntentExtras(intent.getExtras()); } return view; } private void initStateFromIntentExtras(@Nonnull final Bundle extras) { final String address = extras.getString(SendCoinsActivity.INTENT_EXTRA_ADDRESS); final String addressLabel = extras.getString(SendCoinsActivity.INTENT_EXTRA_ADDRESS_LABEL); final BigInteger amount = (BigInteger) extras.getSerializable(SendCoinsActivity.INTENT_EXTRA_AMOUNT); final String bluetoothMac = extras.getString(SendCoinsActivity.INTENT_EXTRA_BLUETOOTH_MAC); update(address, addressLabel, amount, bluetoothMac); } private void initStateFromBitcoinUri(@Nonnull final Uri bitcoinUri) { final String input = bitcoinUri.toString(); new StringInputParser(input) { @Override protected void bitcoinRequest(final Address address, final String addressLabel, final BigInteger amount, final String bluetoothMac) { update(address.toString(), addressLabel, amount, bluetoothMac); } @Override protected void directTransaction(final Transaction transaction) { cannotClassify(input); } @Override protected void error(final int messageResId, final Object... messageArgs) { dialog(activity, dismissListener, 0, messageResId, messageArgs); } private final DialogInterface.OnClickListener dismissListener = new DialogInterface.OnClickListener() { @Override public void onClick(final DialogInterface dialog, final int which) { activity.finish(); } }; }.parse(); } @Override public void onResume() { super.onResume(); contentResolver.registerContentObserver(AddressBookProvider.contentUri(activity.getPackageName()), true, contentObserver); amountCalculatorLink.setListener(amountsListener); loaderManager.initLoader(ID_RATE_LOADER, null, rateLoaderCallbacks); updateView(); } @Override public void onPause() { loaderManager.destroyLoader(ID_RATE_LOADER); amountCalculatorLink.setListener(null); contentResolver.unregisterContentObserver(contentObserver); super.onPause(); } @Override public void onDetach() { handler.removeCallbacksAndMessages(null); super.onDetach(); } @Override public void onDestroy() { backgroundThread.getLooper().quit(); if (sentTransaction != null) sentTransaction.getConfidence().removeEventListener(sentTransactionConfidenceListener); super.onDestroy(); } @Override public void onSaveInstanceState(final Bundle outState) { super.onSaveInstanceState(outState); saveInstanceState(outState); } private void saveInstanceState(final Bundle outState) { outState.putSerializable("state", state); if (validatedAddress != null) outState.putParcelable("validated_address", validatedAddress); outState.putBoolean("is_valid_amounts", isValidAmounts); if (sentTransaction != null) outState.putSerializable("sent_transaction_hash", sentTransaction.getHash()); outState.putString("bluetooth_mac", bluetoothMac); if (bluetoothAck != null) outState.putBoolean("bluetooth_ack", bluetoothAck); } private void restoreInstanceState(final Bundle savedInstanceState) { state = (State) savedInstanceState.getSerializable("state"); validatedAddress = savedInstanceState.getParcelable("validated_address"); isValidAmounts = savedInstanceState.getBoolean("is_valid_amounts"); if (savedInstanceState.containsKey("sent_transaction_hash")) { sentTransaction = wallet .getTransaction((Sha256Hash) savedInstanceState.getSerializable("sent_transaction_hash")); sentTransaction.getConfidence().addEventListener(sentTransactionConfidenceListener); } bluetoothMac = savedInstanceState.getString("bluetooth_mac"); if (savedInstanceState.containsKey("bluetooth_ack")) bluetoothAck = savedInstanceState.getBoolean("bluetooth_ack"); } @Override public void onActivityResult(final int requestCode, final int resultCode, final Intent intent) { if (requestCode == REQUEST_CODE_SCAN) { if (resultCode == Activity.RESULT_OK) { final String input = intent.getStringExtra(ScanActivity.INTENT_EXTRA_RESULT); new StringInputParser(input) { @Override protected void bitcoinRequest(final Address address, final String addressLabel, final BigInteger amount, final String bluetoothMac) { SendCoinsActivity.start(activity, address != null ? address.toString() : null, addressLabel, amount, bluetoothMac); } @Override protected void directTransaction(final Transaction transaction) { cannotClassify(input); } @Override protected void error(final int messageResId, final Object... messageArgs) { dialog(activity, null, R.string.button_scan, messageResId, messageArgs); } }.parse(); } } else if (requestCode == REQUEST_CODE_ENABLE_BLUETOOTH) { bluetoothEnableView.setChecked(resultCode == Activity.RESULT_OK); } } @Override public void onCreateOptionsMenu(final Menu menu, final MenuInflater inflater) { inflater.inflate(R.menu.send_coins_fragment_options, menu); scanAction = menu.findItem(R.id.send_coins_options_scan); final PackageManager pm = activity.getPackageManager(); scanAction.setVisible(pm.hasSystemFeature(PackageManager.FEATURE_CAMERA) || pm.hasSystemFeature(PackageManager.FEATURE_CAMERA_FRONT)); super.onCreateOptionsMenu(menu, inflater); } @Override public boolean onOptionsItemSelected(final MenuItem item) { switch (item.getItemId()) { case R.id.send_coins_options_scan: handleScan(); return true; case R.id.send_coins_options_empty: handleEmpty(); return true; } return super.onOptionsItemSelected(item); } private void validateReceivingAddress(final boolean popups) { try { final String addressStr = receivingAddressView.getText().toString().trim(); if (!addressStr.isEmpty()) { final NetworkParameters addressParams = Address.getParametersFromAddress(addressStr); if (addressParams != null && !addressParams.equals(Constants.NETWORK_PARAMETERS)) { // address is valid, but from different known network if (popups) popupMessage(receivingAddressView, getString(R.string.send_coins_fragment_receiving_address_error_cross_network, addressParams.getId())); } else if (addressParams == null) { // address is valid, but from different unknown network if (popups) popupMessage(receivingAddressView, getString( R.string.send_coins_fragment_receiving_address_error_cross_network_unknown)); } else { // valid address final String label = AddressBookProvider.resolveLabel(activity, addressStr); validatedAddress = new AddressAndLabel(Constants.NETWORK_PARAMETERS, addressStr, label); receivingAddressView.setText(null); } } else { // empty field should not raise error message } } catch (final AddressFormatException x) { // could not decode address at all if (popups) popupMessage(receivingAddressView, getString(R.string.send_coins_fragment_receiving_address_error)); } updateView(); } private void validateAmounts(final boolean popups) { isValidAmounts = false; final BigInteger amount = amountCalculatorLink.getAmount(); if (amount == null) { // empty amount if (popups) popupMessage(amountCalculatorLink.activeView(), getString(R.string.send_coins_fragment_amount_empty)); } else if (amount.signum() > 0) { final BigInteger estimated = wallet.getBalance(BalanceType.ESTIMATED); final BigInteger available = wallet.getBalance(BalanceType.AVAILABLE); final BigInteger pending = estimated.subtract(available); // TODO subscribe to wallet changes final BigInteger availableAfterAmount = available.subtract(amount); final boolean enoughFundsForAmount = availableAfterAmount.signum() >= 0; if (enoughFundsForAmount) { // everything fine isValidAmounts = true; } else { // not enough funds for amount if (popups) popupAvailable(amountCalculatorLink.activeView(), available, pending); } } else { // invalid amount if (popups) popupMessage(amountCalculatorLink.activeView(), getString(R.string.send_coins_fragment_amount_error)); } updateView(); } private void popupMessage(@Nonnull final View anchor, @Nonnull final String message) { dismissPopup(); popupMessageView.setText(message); popupMessageView.setMaxWidth(getView().getWidth()); popup(anchor, popupMessageView); } private void popupAvailable(@Nonnull final View anchor, @Nonnull final BigInteger available, @Nonnull final BigInteger pending) { dismissPopup(); final CurrencyTextView viewAvailable = (CurrencyTextView) popupAvailableView .findViewById(R.id.send_coins_popup_available_amount); viewAvailable.setPrefix(btcShift == 0 ? Constants.CURRENCY_CODE_BTC : Constants.CURRENCY_CODE_MBTC); viewAvailable.setPrecision(btcPrecision, btcShift); viewAvailable.setAmount(available); final TextView viewPending = (TextView) popupAvailableView .findViewById(R.id.send_coins_popup_available_pending); viewPending.setVisibility(pending.signum() > 0 ? View.VISIBLE : View.GONE); final int precision = btcShift == 0 ? Constants.BTC_MAX_PRECISION : Constants.MBTC_MAX_PRECISION; viewPending.setText(getString(R.string.send_coins_fragment_pending, GenericUtils.formatValue(pending, precision, btcShift))); popup(anchor, popupAvailableView); } private void popup(@Nonnull final View anchor, @Nonnull final View contentView) { contentView.measure(MeasureSpec.makeMeasureSpec(MeasureSpec.UNSPECIFIED, 0), MeasureSpec.makeMeasureSpec(MeasureSpec.UNSPECIFIED, 0)); popupWindow = new PopupWindow(contentView, contentView.getMeasuredWidth(), contentView.getMeasuredHeight(), false); popupWindow.showAsDropDown(anchor); // hack contentView.setBackgroundResource( popupWindow.isAboveAnchor() ? R.drawable.popup_frame_above : R.drawable.popup_frame_below); } private void dismissPopup() { if (popupWindow != null) { popupWindow.dismiss(); popupWindow = null; } } private void handleGo() { state = State.PREPARATION; updateView(); // create spend final BigInteger amount = amountCalculatorLink.getAmount(); final SendRequest sendRequest = SendRequest.to(validatedAddress.address, amount); sendRequest.changeAddress = WalletUtils.pickOldestKey(wallet).toAddress(Constants.NETWORK_PARAMETERS); sendRequest.emptyWallet = amount.equals(wallet.getBalance(BalanceType.AVAILABLE)); new SendCoinsOfflineTask(wallet, backgroundHandler) { @Override protected void onSuccess(final Transaction transaction) { sentTransaction = transaction; state = State.SENDING; updateView(); sentTransaction.getConfidence().addEventListener(sentTransactionConfidenceListener); if (bluetoothAdapter != null && bluetoothAdapter.isEnabled() && bluetoothMac != null && bluetoothEnableView.isChecked()) { new SendBluetoothTask(bluetoothAdapter, backgroundHandler) { @Override protected void onResult(final boolean ack) { bluetoothAck = ack; if (state == State.SENDING) state = State.SENT; updateView(); } }.send(bluetoothMac, transaction); // send asynchronously } application.broadcastTransaction(sentTransaction); final Intent result = new Intent(); BitcoinIntegration.transactionHashToResult(result, sentTransaction.getHashAsString()); activity.setResult(Activity.RESULT_OK, result); } @Override protected void onFailure() { state = State.FAILED; updateView(); activity.longToast(R.string.send_coins_error_msg); } }.sendCoinsOffline(sendRequest); // send asynchronously } private void handleScan() { startActivityForResult(new Intent(activity, ScanActivity.class), REQUEST_CODE_SCAN); } private void handleEmpty() { final BigInteger available = wallet.getBalance(BalanceType.AVAILABLE); amountCalculatorLink.setBtcAmount(available); } public class AutoCompleteAddressAdapter extends CursorAdapter { public AutoCompleteAddressAdapter(final Context context, final Cursor c) { super(context, c); } @Override public View newView(final Context context, final Cursor cursor, final ViewGroup parent) { final LayoutInflater inflater = LayoutInflater.from(context); return inflater.inflate(R.layout.address_book_row, parent, false); } @Override public void bindView(final View view, final Context context, final Cursor cursor) { final String label = cursor.getString(cursor.getColumnIndexOrThrow(AddressBookProvider.KEY_LABEL)); final String address = cursor.getString(cursor.getColumnIndexOrThrow(AddressBookProvider.KEY_ADDRESS)); final ViewGroup viewGroup = (ViewGroup) view; final TextView labelView = (TextView) viewGroup.findViewById(R.id.address_book_row_label); labelView.setText(label); final TextView addressView = (TextView) viewGroup.findViewById(R.id.address_book_row_address); addressView.setText(WalletUtils.formatHash(address, Constants.ADDRESS_FORMAT_GROUP_SIZE, Constants.ADDRESS_FORMAT_LINE_SIZE)); } @Override public CharSequence convertToString(final Cursor cursor) { return cursor.getString(cursor.getColumnIndexOrThrow(AddressBookProvider.KEY_ADDRESS)); } @Override public Cursor runQueryOnBackgroundThread(final CharSequence constraint) { final Cursor cursor = activity.managedQuery(AddressBookProvider.contentUri(activity.getPackageName()), null, AddressBookProvider.SELECTION_QUERY, new String[] { constraint.toString() }, null); return cursor; } } private void updateView() { if (validatedAddress != null) { receivingAddressView.setVisibility(View.GONE); receivingStaticView.setVisibility(View.VISIBLE); receivingStaticAddressView.setText(WalletUtils.formatAddress(validatedAddress.address, Constants.ADDRESS_FORMAT_GROUP_SIZE, Constants.ADDRESS_FORMAT_LINE_SIZE)); final String addressBookLabel = AddressBookProvider.resolveLabel(activity, validatedAddress.address.toString()); final String staticLabel; if (addressBookLabel != null) staticLabel = addressBookLabel; else if (validatedAddress.label != null) staticLabel = validatedAddress.label; else staticLabel = getString(R.string.address_unlabeled); receivingStaticLabelView.setText(staticLabel); receivingStaticLabelView.setTextColor(getResources() .getColor(validatedAddress.label != null ? R.color.fg_significant : R.color.fg_insignificant)); } else { receivingStaticView.setVisibility(View.GONE); receivingAddressView.setVisibility(View.VISIBLE); } receivingAddressView.setEnabled(state == State.INPUT); receivingStaticView.setEnabled(state == State.INPUT); amountCalculatorLink.setEnabled(state == State.INPUT); bluetoothEnableView .setVisibility(bluetoothAdapter != null && bluetoothMac != null ? View.VISIBLE : View.GONE); bluetoothEnableView.setEnabled(state == State.INPUT); if (sentTransaction != null) { final String precision = prefs.getString(Constants.PREFS_KEY_BTC_PRECISION, Constants.PREFS_DEFAULT_BTC_PRECISION); final int btcPrecision = precision.charAt(0) - '0'; final int btcShift = precision.length() == 3 ? precision.charAt(2) - '0' : 0; sentTransactionView.setVisibility(View.VISIBLE); sentTransactionListAdapter.setPrecision(btcPrecision, btcShift); sentTransactionListAdapter.replace(sentTransaction); } else { sentTransactionView.setVisibility(View.GONE); sentTransactionListAdapter.clear(); } if (bluetoothAck != null) { bluetoothMessageView.setVisibility(View.VISIBLE); bluetoothMessageView.setText(bluetoothAck ? R.string.send_coins_fragment_bluetooth_ack : R.string.send_coins_fragment_bluetooth_nack); } else { bluetoothMessageView.setVisibility(View.GONE); } viewCancel.setEnabled(state != State.PREPARATION); viewGo.setEnabled(everythingValid()); if (state == State.INPUT) { viewCancel.setText(R.string.button_cancel); viewGo.setText(R.string.send_coins_fragment_button_send); } else if (state == State.PREPARATION) { viewCancel.setText(R.string.button_cancel); viewGo.setText(R.string.send_coins_preparation_msg); } else if (state == State.SENDING) { viewCancel.setText(R.string.send_coins_fragment_button_back); viewGo.setText(R.string.send_coins_sending_msg); } else if (state == State.SENT) { viewCancel.setText(R.string.send_coins_fragment_button_back); viewGo.setText(R.string.send_coins_sent_msg); } else if (state == State.FAILED) { viewCancel.setText(R.string.send_coins_fragment_button_back); viewGo.setText(R.string.send_coins_failed_msg); } if (scanAction != null) scanAction.setEnabled(state == State.INPUT); } private boolean everythingValid() { return state == State.INPUT && validatedAddress != null && isValidAmounts; } public void update(final String receivingAddress, final String receivingLabel, @Nullable final BigInteger amount, @Nullable final String bluetoothMac) { try { validatedAddress = new AddressAndLabel(Constants.NETWORK_PARAMETERS, receivingAddress, receivingLabel); receivingAddressView.setText(null); } catch (final Exception x) { receivingAddressView.setText(receivingAddress); validatedAddress = null; log.info("problem parsing address: '" + receivingAddress + "'", x); } if (amount != null) amountCalculatorLink.setBtcAmount(amount); // focus if (receivingAddress != null && amount == null) amountCalculatorLink.requestFocus(); else if (receivingAddress != null && amount != null) viewGo.requestFocus(); this.bluetoothMac = bluetoothMac; bluetoothAck = null; updateView(); handler.postDelayed(new Runnable() { @Override public void run() { validateReceivingAddress(true); validateAmounts(true); } }, 500); } }