Java tutorial
/* * Copyright 2011-2014 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 com.kncwallet.wallet.ui; import java.math.BigInteger; import java.util.ArrayList; import java.util.Hashtable; import javax.annotation.Nonnull; import android.app.Activity; import android.app.AlertDialog; import android.app.ProgressDialog; import android.content.Context; import android.content.Intent; import android.content.SharedPreferences; import android.content.pm.PackageManager; import android.database.Cursor; import android.graphics.Bitmap; import android.graphics.Color; import android.net.Uri; import android.os.Bundle; import android.os.Handler; import android.preference.PreferenceManager; 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.View; import android.widget.ImageView; import android.widget.ListView; import android.widget.TextView; import android.widget.Toast; import com.actionbarsherlock.app.SherlockListFragment; 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.Transaction; import com.google.bitcoin.uri.BitcoinURI; import com.kncwallet.wallet.AddressBookProvider; import com.kncwallet.wallet.Constants; import com.kncwallet.wallet.ContactImage; import com.kncwallet.wallet.ui.InputParser.StringInputParser; import com.kncwallet.wallet.ui.dialog.KnCDialog; import com.kncwallet.wallet.util.BitmapFragment; import com.kncwallet.wallet.util.ContactsDownloader; import com.kncwallet.wallet.util.Qr; import com.kncwallet.wallet.util.WalletUtils; import com.kncwallet.wallet.R; import com.loopj.android.image.SmartImage; import com.loopj.android.image.SmartImageView; /** * @author Andreas Schildbach */ public final class SendingAddressesFragment extends SherlockListFragment implements LoaderManager.LoaderCallbacks<Cursor> { private AbstractWalletActivity activity; private ClipboardManager clipboardManager; private LoaderManager loaderManager; private SimpleCursorAdapter adapter; private String walletAddressesSelection; private final Handler handler = new Handler(); private static final int REQUEST_CODE_SCAN = 0; private Hashtable<String, Object> contactImageCache = new Hashtable<String, Object>(); private Hashtable<String, Object> contactImageUrlsCache = new Hashtable<String, Object>(); private Hashtable<String, Integer> sourceCache = new Hashtable<String, Integer>(); @Override public void onAttach(final Activity activity) { super.onAttach(activity); this.activity = (AbstractWalletActivity) activity; this.clipboardManager = (ClipboardManager) activity.getSystemService(Context.CLIPBOARD_SERVICE); this.loaderManager = getLoaderManager(); } @Override public void onCreate(final Bundle savedInstanceState) { super.onCreate(savedInstanceState); setHasOptionsMenu(true); } @Override public void onActivityCreated(final Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); setEmptyText(getString(R.string.address_book_empty_text)); adapter = new SimpleCursorAdapter(activity, R.layout.address_book_row, null, new String[] { AddressBookProvider.KEY_RAW_TELEPHONE, AddressBookProvider.KEY_ADDRESS, AddressBookProvider.KEY_LABEL, AddressBookProvider.KEY_ADDRESS, AddressBookProvider.KEY_ADDRESS }, new int[] { R.id.address_book_row_number, R.id.address_book_contact_image, R.id.address_book_row_label, R.id.address_book_row_address, R.id.address_book_row_source_image }, 0); adapter.setViewBinder(new ViewBinder() { @Override public boolean setViewValue(final View view, final Cursor cursor, final int columnIndex) { if (view.getId() == R.id.address_book_contact_image) { SmartImageView img = (SmartImageView) view; String address = cursor.getString(columnIndex); Bitmap contactImage = cachedBitmap(address); if (contactImage != null) { img.setImageBitmap(contactImage); } else { String imageUrl = cachedImageUrl(address); if (imageUrl != null) { img.setImageUrl(imageUrl, R.drawable.contact_placeholder); } else { img.setImageResource(R.drawable.contact_placeholder); } } return true; //true because the data was bound to the view } if (view.getId() == R.id.address_book_row_number) { ((TextView) view).setText(cursor.getString(columnIndex)); return true; } if (!AddressBookProvider.KEY_ADDRESS.equals(cursor.getColumnName(columnIndex))) return false; if (view.getId() == R.id.address_book_row_source_image) { ((ImageView) view).setImageResource(cachedSourceImageResource(cursor.getString(columnIndex))); view.setVisibility(View.VISIBLE); return true; } ((TextView) view).setText(WalletUtils.formatHash(cursor.getString(columnIndex), Constants.ADDRESS_FORMAT_GROUP_SIZE, 24)); return true; } }); setListAdapter(adapter); loaderManager.initLoader(0, null, this); getListView().setCacheColorHint(Color.TRANSPARENT); getListView().setBackgroundColor(getResources().getColor(R.color.knc_background_darker)); getView().setBackgroundColor(getResources().getColor(R.color.knc_background_darker)); } private String cachedImageUrl(String address) { Object cached = contactImageUrlsCache.get(address); if (cached == null) { String imageUrl = ContactImage.getImageUrl(activity, AddressBookProvider.resolveRowId(activity, address)); if (imageUrl != null) { contactImageUrlsCache.put(address, imageUrl); cached = imageUrl; } else { contactImageUrlsCache.put(address, new Object()); cached = new Object(); } } if (cached instanceof String) { return (String) cached; } return null; } private Bitmap cachedBitmap(String address) { Object cached = contactImageCache.get(address); if (cached == null) { Bitmap bitmap = AddressBookProvider.bitmapForAddress(SendingAddressesFragment.this.getActivity(), address); if (bitmap != null) { contactImageCache.put(address, bitmap); cached = bitmap; } else { contactImageCache.put(address, new Object()); cached = new Object(); } } if (cached instanceof Bitmap) { return (Bitmap) cached; } return null; } private int cachedSourceImageResource(String address) { Integer resource = sourceCache.get(address); if (resource == null) { resource = AddressBookProvider.imageResourceForSource(activity, address); sourceCache.put(address, resource); } return resource; } @Override public void onActivityResult(final int requestCode, final int resultCode, final Intent intent) { if (requestCode == REQUEST_CODE_SCAN && 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) { // workaround for "IllegalStateException: Can not perform this action after onSaveInstanceState" handler.postDelayed(new Runnable() { @Override public void run() { EditAddressBookEntryFragment.edit(getFragmentManager(), address.toString()); } }, 500); } @Override protected void directTransaction(final Transaction transaction) { cannotClassify(input); } @Override protected void error(final int messageResId, final Object... messageArgs) { dialog(activity, null, R.string.address_book_options_scan_title, messageResId, messageArgs); } }.parse(); } } @Override public void onCreateOptionsMenu(final Menu menu, final MenuInflater inflater) { inflater.inflate(R.menu.sending_addresses_fragment_options, menu); final PackageManager pm = activity.getPackageManager(); menu.findItem(R.id.sending_addresses_options_scan) .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.sending_addresses_options_paste: handlePasteClipboard(); return true; case R.id.sending_addresses_options_scan: handleScan(); return true; case R.id.sending_addresses_options_reload: handleReloadContacts(); return true; } return super.onOptionsItemSelected(item); } private void handleReloadContacts() { final Context context = activity; SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context); String phoneNumber = activity.getWalletApplication().GetPhoneNumber(); final ProgressDialog progressDialog = new ProgressDialog(context); progressDialog.setTitle(R.string.contacts_lookup_refresh_title); progressDialog.setMessage(getString(R.string.contacts_lookup_refresh_message)); progressDialog.setCancelable(false); progressDialog.show(); KnCDialog.fixDialogDivider(progressDialog); new ContactsDownloader(context, prefs, phoneNumber, new ContactsDownloader.ContactsDownloaderListener() { @Override public void onSuccess(int newContacts) { progressDialog.dismiss(); if (newContacts > 0) { Toast.makeText(context, getString(R.string.contacts_lookup_contacts_added, "" + newContacts), Toast.LENGTH_SHORT).show(); } else { Toast.makeText(context, R.string.contacts_lookup_success, Toast.LENGTH_SHORT).show(); } } @Override public void onError(String message) { progressDialog.dismiss(); Toast.makeText(context, message, Toast.LENGTH_SHORT).show(); } }).doContactsLookup(); } private void handlePasteClipboard() { if (clipboardManager.hasText()) { final String input = clipboardManager.getText().toString().trim(); new StringInputParser(input) { @Override protected void bitcoinRequest(final Address address, final String addressLabel, final BigInteger amount, final String bluetoothMac) { EditAddressBookEntryFragment.edit(getFragmentManager(), address.toString()); } @Override protected void directTransaction(final Transaction transaction) { cannotClassify(input); } @Override protected void error(final int messageResId, final Object... messageArgs) { dialog(activity, null, R.string.address_book_options_paste_from_clipboard_title, messageResId, messageArgs); } }.parse(); } else { activity.toast(R.string.address_book_options_copy_from_clipboard_msg_empty); } } private void handleScan() { startActivityForResult(new Intent(activity, ScanActivity.class), REQUEST_CODE_SCAN); } @Override public void onListItemClick(final ListView l, final View v, final int position, final long id) { activity.startActionMode(new ActionMode.Callback() { @Override public boolean onCreateActionMode(final ActionMode mode, final Menu menu) { final MenuInflater inflater = mode.getMenuInflater(); inflater.inflate(R.menu.sending_addresses_context, menu); String address = getAddress(position); if (!AddressBookProvider.canEditAddress(activity, address)) { menu.removeItem(R.id.sending_addresses_context_edit); } if (!AddressBookProvider.canDeleteAddress(activity, address)) { menu.removeItem(R.id.sending_addresses_context_remove); } return true; } @Override public boolean onPrepareActionMode(final ActionMode mode, final Menu menu) { final String label = getLabel(position); mode.setTitle(label); return true; } @Override public boolean onActionItemClicked(final ActionMode mode, final MenuItem item) { switch (item.getItemId()) { case R.id.sending_addresses_context_send: final Intent intent = new Intent(activity, WalletActivity.class); intent.putExtra(WalletActivity.INTENT_EXTRA_ADDRESS, getAddress(position)); intent.putExtra(WalletActivity.INTENT_EXTRA_ADDRESS_LABEL, getLabel(position)); mode.finish(); activity.setResult(WalletActivity.RESULT_CODE_ADDRESSBOOK_SEND, intent); activity.finish(); return true; case R.id.sending_addresses_context_edit: EditAddressBookEntryFragment.edit(getFragmentManager(), getAddress(position)); mode.finish(); return true; case R.id.sending_addresses_context_remove: handleRemove(getAddress(position)); mode.finish(); return true; case R.id.sending_addresses_context_show_qr: handleShowQr(getAddress(position)); mode.finish(); return true; case R.id.sending_addresses_context_copy_to_clipboard: handleCopyToClipboard(getAddress(position)); mode.finish(); return true; } return false; } @Override public void onDestroyActionMode(final ActionMode mode) { } private String getAddress(final int position) { final Cursor cursor = (Cursor) adapter.getItem(position); return cursor.getString(cursor.getColumnIndexOrThrow(AddressBookProvider.KEY_ADDRESS)); } private String getLabel(final int position) { final Cursor cursor = (Cursor) adapter.getItem(position); return cursor.getString(cursor.getColumnIndexOrThrow(AddressBookProvider.KEY_LABEL)); } }); } private void handleRemove(final String address) { final Uri uri = AddressBookProvider.contentUri(activity.getPackageName()).buildUpon().appendPath(address) .build(); activity.getContentResolver().delete(uri, null, null); } private void handleShowQr(final String address) { final String uri = BitcoinURI.convertToBitcoinURI(address, null, null, null); final int size = (int) (256 * getResources().getDisplayMetrics().density); BitmapFragment.show(getFragmentManager(), Qr.bitmap(uri, size)); } private void handleCopyToClipboard(final String address) { clipboardManager.setText(address); activity.toast(R.string.wallet_address_fragment_clipboard_msg); } @Override public Loader<Cursor> onCreateLoader(final int id, final Bundle args) { final Uri uri = AddressBookProvider.contentUri(activity.getPackageName()); return new CursorLoader(activity, uri, null, AddressBookProvider.SELECTION_ACTIVE_STATE, new String[] { walletAddressesSelection != null ? walletAddressesSelection : "" }, AddressBookProvider.KEY_LABEL + " COLLATE LOCALIZED ASC"); } @Override public void onLoadFinished(final Loader<Cursor> loader, final Cursor data) { adapter.swapCursor(data); } @Override public void onLoaderReset(final Loader<Cursor> loader) { adapter.swapCursor(null); } public void setWalletAddresses(@Nonnull 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(); } }