Java tutorial
/* * Copyright 2011-2012 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 piuk.blockchain.android.ui; import java.util.ArrayList; import android.app.Activity; import android.content.Context; import android.content.Intent; import android.database.Cursor; import android.net.Uri; import android.os.Bundle; import android.support.v4.app.ListFragment; import android.support.v4.app.LoaderManager; import android.support.v4.content.CursorLoader; import android.support.v4.content.Loader; import android.support.v4.widget.SimpleCursorAdapter; import android.support.v4.widget.SimpleCursorAdapter.ViewBinder; import android.text.ClipboardManager; import android.view.ContextMenu; import android.view.ContextMenu.ContextMenuInfo; import android.view.MenuItem; import android.view.View; import android.widget.AdapterView.AdapterContextMenuInfo; import android.widget.ListView; import android.widget.TextView; import com.google.bitcoin.core.Address; import com.google.bitcoin.uri.BitcoinURI; import piuk.blockchain.android.R; import piuk.blockchain.android.AddressBookProvider; import piuk.blockchain.android.Constants; import piuk.blockchain.android.util.QrDialog; import piuk.blockchain.android.util.WalletUtils; /** * @author Andreas Schildbach */ public final class SendingAddressesFragment extends ListFragment implements LoaderManager.LoaderCallbacks<Cursor> { private Activity activity; private SimpleCursorAdapter adapter; private String walletAddressesSelection; @Override public void onActivityCreated(final Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); activity = getActivity(); setEmptyText(getString(R.string.address_book_empty_text)); adapter = new SimpleCursorAdapter(activity, R.layout.address_book_row, null, new String[] { AddressBookProvider.KEY_LABEL, AddressBookProvider.KEY_ADDRESS }, new int[] { R.id.address_book_row_label, R.id.address_book_row_address }, 0); adapter.setViewBinder(new ViewBinder() { public boolean setViewValue(final View view, final Cursor cursor, final int columnIndex) { if (!AddressBookProvider.KEY_ADDRESS.equals(cursor.getColumnName(columnIndex))) return false; ((TextView) view).setText(cursor.getString(columnIndex)); return true; } }); setListAdapter(adapter); getLoaderManager().initLoader(0, null, this); } @Override public void onViewCreated(final View view, final Bundle savedInstanceState) { super.onViewCreated(view, savedInstanceState); registerForContextMenu(getListView()); } @Override public void onListItemClick(final ListView l, final View v, final int position, final long id) { final Cursor cursor = (Cursor) adapter.getItem(position); final String address = cursor.getString(cursor.getColumnIndexOrThrow(AddressBookProvider.KEY_ADDRESS)); handleSend(address); } @Override public void onCreateContextMenu(final ContextMenu menu, final View v, final ContextMenuInfo menuInfo) { activity.getMenuInflater().inflate(R.menu.sending_addresses_context, menu); } @Override public boolean onContextItemSelected(final MenuItem item) { final AdapterContextMenuInfo menuInfo = (AdapterContextMenuInfo) item.getMenuInfo(); switch (item.getItemId()) { case R.id.sending_addresses_context_send: { final Cursor cursor = (Cursor) adapter.getItem(menuInfo.position); final String address = cursor.getString(cursor.getColumnIndexOrThrow(AddressBookProvider.KEY_ADDRESS)); handleSend(address); return true; } case R.id.sending_addresses_context_edit: { final Cursor cursor = (Cursor) adapter.getItem(menuInfo.position); final String address = cursor.getString(cursor.getColumnIndexOrThrow(AddressBookProvider.KEY_ADDRESS)); EditAddressBookEntryFragment.edit(getFragmentManager(), address); return true; } case R.id.sending_addresses_context_remove: { final Cursor cursor = (Cursor) adapter.getItem(menuInfo.position); final String address = cursor.getString(cursor.getColumnIndexOrThrow(AddressBookProvider.KEY_ADDRESS)); handleRemove(address); return true; } case R.id.sending_addresses_context_show_qr: { final Cursor cursor = (Cursor) adapter.getItem(menuInfo.position); Address address; try { address = new Address(Constants.NETWORK_PARAMETERS, cursor.getString(cursor.getColumnIndexOrThrow(AddressBookProvider.KEY_ADDRESS))); final String uri = BitcoinURI.convertToBitcoinURI(address, null, null, null); final int size = (int) (256 * getResources().getDisplayMetrics().density); new QrDialog(activity, WalletUtils.getQRCodeBitmap(uri, size)).show(); return true; } catch (Exception e) { e.printStackTrace(); return false; } } case R.id.sending_addresses_context_copy_to_clipboard: { final Cursor cursor = (Cursor) adapter.getItem(menuInfo.position); final String address = cursor.getString(cursor.getColumnIndexOrThrow(AddressBookProvider.KEY_ADDRESS)); handleCopyToClipboard(address); return true; } default: return false; } } private void handleSend(final String address) { final Intent intent = new Intent(activity, SendCoinsActivity.class); intent.putExtra(SendCoinsActivity.INTENT_EXTRA_ADDRESS, address); startActivity(intent); } private void handleRemove(final String address) { final Uri uri = AddressBookProvider.CONTENT_URI.buildUpon().appendPath(address).build(); activity.getContentResolver().delete(uri, null, null); } private void handleCopyToClipboard(final String address) { ClipboardManager clipboardManager = (ClipboardManager) activity.getSystemService(Context.CLIPBOARD_SERVICE); clipboardManager.setText(address); ((AbstractWalletActivity) activity).toast(R.string.wallet_address_fragment_clipboard_msg); } public Loader<Cursor> onCreateLoader(final int id, final Bundle args) { final Uri uri = AddressBookProvider.CONTENT_URI; return new CursorLoader(activity, uri, null, AddressBookProvider.SELECTION_NOTIN, new String[] { walletAddressesSelection != null ? walletAddressesSelection : "" }, AddressBookProvider.KEY_LABEL + " COLLATE LOCALIZED ASC"); } public void onLoadFinished(final Loader<Cursor> loader, final Cursor data) { adapter.swapCursor(data); } public void onLoaderReset(final Loader<Cursor> loader) { adapter.swapCursor(null); } public void setWalletAddresses(final ArrayList<Address> addresses) { final StringBuilder builder = new StringBuilder(); for (final Address address : addresses) builder.append(address.toString()).append(","); if (addresses.size() > 0) builder.setLength(builder.length() - 1); walletAddressesSelection = builder.toString(); } }