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.math.BigInteger; import java.util.ArrayList; import android.app.Activity; import android.content.Context; import android.content.Intent; import android.graphics.Bitmap; import android.net.Uri; import android.nfc.NfcManager; import android.os.Bundle; import android.support.v4.app.ShareCompat.IntentBuilder; import android.text.ClipboardManager; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.AdapterView.OnItemSelectedListener; import android.widget.CheckBox; import android.widget.CompoundButton; import android.widget.CompoundButton.OnCheckedChangeListener; import android.widget.ImageView; import android.widget.Spinner; import com.actionbarsherlock.app.SherlockFragment; import com.actionbarsherlock.view.Menu; import com.actionbarsherlock.view.MenuInflater; import com.actionbarsherlock.view.MenuItem; import com.actionbarsherlock.widget.ShareActionProvider; import com.google.bitcoin.core.Address; import com.google.bitcoin.core.ECKey; import com.google.bitcoin.uri.BitcoinURI; import de.schildbach.wallet.AddressBookProvider; import de.schildbach.wallet.Constants; import de.schildbach.wallet.WalletApplication; import de.schildbach.wallet.util.BitmapFragment; import de.schildbach.wallet.util.NfcTools; import de.schildbach.wallet.util.WalletUtils; import de.schildbach.wallet_test.R; /** * @author Andreas Schildbach */ public final class RequestCoinsFragment extends SherlockFragment implements AmountCalculatorFragment.Listener { private AbstractWalletActivity activity; private WalletApplication application; private NfcManager nfcManager; private ClipboardManager clipboardManager; private ShareActionProvider shareActionProvider; private ImageView qrView; private Bitmap qrCodeBitmap; private CurrencyAmountView amountView; private Spinner addressView; private CheckBox includeLabelView; private View nfcEnabledView; @Override public void onAttach(final Activity activity) { super.onAttach(activity); this.activity = (AbstractWalletActivity) activity; this.application = (WalletApplication) activity.getApplication(); this.nfcManager = (NfcManager) activity.getSystemService(Context.NFC_SERVICE); this.clipboardManager = (ClipboardManager) activity.getSystemService(Context.CLIPBOARD_SERVICE); } @Override public View onCreateView(final LayoutInflater inflater, final ViewGroup container, final Bundle savedInstanceState) { final View view = inflater.inflate(R.layout.request_coins_fragment, container, false); qrView = (ImageView) view.findViewById(R.id.request_coins_qr); qrView.setOnClickListener(new OnClickListener() { public void onClick(final View v) { BitmapFragment.show(getFragmentManager(), qrCodeBitmap); } }); amountView = (CurrencyAmountView) view.findViewById(R.id.request_coins_amount); amountView.setContextButton(R.drawable.ic_input_calculator, new OnClickListener() { public void onClick(final View v) { AmountCalculatorFragment.calculate(getFragmentManager(), RequestCoinsFragment.this); } }); addressView = (Spinner) view.findViewById(R.id.request_coins_fragment_address); final ArrayList<ECKey> keys = application.getWallet().keychain; final WalletAddressesAdapter adapter = new WalletAddressesAdapter(activity, keys, false); addressView.setAdapter(adapter); final Address selectedAddress = application.determineSelectedAddress(); for (int i = 0; i < keys.size(); i++) { final Address address = keys.get(i).toAddress(Constants.NETWORK_PARAMETERS); if (address.equals(selectedAddress)) { addressView.setSelection(i); break; } } includeLabelView = (CheckBox) view.findViewById(R.id.request_coins_fragment_include_label); nfcEnabledView = view.findViewById(R.id.request_coins_fragment_nfc_enabled); return view; } @Override public void onViewCreated(final View view, final Bundle savedInstanceState) { super.onViewCreated(view, savedInstanceState); // don't call in onCreate() because ActionBarSherlock invokes onCreateOptionsMenu() too early setHasOptionsMenu(true); } @Override public void onResume() { super.onResume(); amountView.setListener(new CurrencyAmountView.Listener() { public void changed() { updateView(); updateShareIntent(); } public void done() { } public void focusChanged(final boolean hasFocus) { } }); addressView.setOnItemSelectedListener(new OnItemSelectedListener() { public void onItemSelected(final AdapterView<?> parent, final View view, final int position, final long id) { // ignore layout operations if (view == null) return; updateView(); updateShareIntent(); } public void onNothingSelected(final AdapterView<?> parent) { } }); includeLabelView.setOnCheckedChangeListener(new OnCheckedChangeListener() { public void onCheckedChanged(final CompoundButton buttonView, final boolean isChecked) { updateView(); updateShareIntent(); } }); updateView(); } @Override public void onPause() { NfcTools.unpublish(nfcManager, activity); amountView.setListener(null); addressView.setOnItemSelectedListener(null); includeLabelView.setOnCheckedChangeListener(null); super.onPause(); } @Override public void onCreateOptionsMenu(final Menu menu, final MenuInflater inflater) { inflater.inflate(R.menu.request_coins_fragment_options, menu); final MenuItem shareItem = menu.findItem(R.id.request_coins_options_share); shareActionProvider = (ShareActionProvider) shareItem.getActionProvider(); updateShareIntent(); super.onCreateOptionsMenu(menu, inflater); } @Override public boolean onOptionsItemSelected(final MenuItem item) { switch (item.getItemId()) { case R.id.request_coins_options_copy: handleCopy(); return true; case R.id.request_coins_options_local_app: handleLocalApp(); return true; } return super.onOptionsItemSelected(item); } private void handleCopy() { final String request = determineRequestStr(); clipboardManager.setText(request); activity.toast(R.string.request_coins_clipboard_msg); } private void handleLocalApp() { final Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(determineRequestStr())); startActivity(intent); activity.finish(); } private void updateView() { final String request = determineRequestStr(); // update qr code final int size = (int) (256 * getResources().getDisplayMetrics().density); qrCodeBitmap = WalletUtils.getQRCodeBitmap(request, size); qrView.setImageBitmap(qrCodeBitmap); // update ndef message final boolean success = NfcTools.publishUri(nfcManager, getActivity(), request); if (success) nfcEnabledView.setVisibility(View.VISIBLE); } private void updateShareIntent() { // update share intent final IntentBuilder builder = IntentBuilder.from(activity); builder.setText(determineRequestStr()); builder.setType("text/plain"); builder.setChooserTitle(R.string.request_coins_share_dialog_title); shareActionProvider.setShareIntent(builder.getIntent()); } private String determineRequestStr() { final boolean includeLabel = includeLabelView.isChecked(); final ECKey key = (ECKey) addressView.getSelectedItem(); final Address address = key.toAddress(Constants.NETWORK_PARAMETERS); final String label = includeLabel ? AddressBookProvider.resolveLabel(activity, address.toString()) : null; final BigInteger amount = amountView.getAmount(); return BitcoinURI.convertToBitcoinURI(address, amount, label, null).toString(); } public void useCalculatedAmount(final BigInteger amount) { amountView.setAmount(amount, true); } }