com.bushstar.htmlcoin_android_wallet.ui.RequestCoinsFragment.java Source code

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Here is the source code for com.bushstar.htmlcoin_android_wallet.ui.RequestCoinsFragment.java

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/*
 * 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.bushstar.htmlcoin_android_wallet.ui;

import java.math.BigInteger;

import javax.annotation.CheckForNull;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.net.Uri;
import android.nfc.NfcManager;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.LoaderManager;
import android.support.v4.app.LoaderManager.LoaderCallbacks;
import android.support.v4.content.Loader;
import android.text.ClipboardManager;
import android.text.SpannableStringBuilder;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.ImageView;
import android.widget.TextView;

import com.actionbarsherlock.app.SherlockFragment;
import com.actionbarsherlock.view.Menu;
import com.actionbarsherlock.view.MenuInflater;
import com.actionbarsherlock.view.MenuItem;
import com.bushstar.htmlcoinj.core.Address;
import com.bushstar.htmlcoinj.core.Wallet;
import com.bushstar.htmlcoinj.uri.HTMLcoinURI;

import com.bushstar.htmlcoin_android_wallet.Configuration;
import com.bushstar.htmlcoin_android_wallet.Constants;
import com.bushstar.htmlcoin_android_wallet.ExchangeRatesProvider;
import com.bushstar.htmlcoin_android_wallet.ExchangeRatesProvider.ExchangeRate;
import com.bushstar.htmlcoin_android_wallet.WalletApplication;
import com.bushstar.htmlcoin_android_wallet.offline.AcceptBluetoothService;
import com.bushstar.htmlcoin_android_wallet.util.BitmapFragment;
import com.bushstar.htmlcoin_android_wallet.util.Bluetooth;
import com.bushstar.htmlcoin_android_wallet.util.Nfc;
import com.bushstar.htmlcoin_android_wallet.util.PaymentProtocol;
import com.bushstar.htmlcoin_android_wallet.util.Qr;
import com.bushstar.htmlcoin_android_wallet.R;

/**
 * @author Andreas Schildbach
 */
public final class RequestCoinsFragment extends SherlockFragment {
    private AbstractBindServiceActivity activity;
    private WalletApplication application;
    private Configuration config;
    private Wallet wallet;
    private NfcManager nfcManager;
    private LoaderManager loaderManager;
    private ClipboardManager clipboardManager;
    @CheckForNull
    private BluetoothAdapter bluetoothAdapter;

    private ImageView qrView;
    private Bitmap qrCodeBitmap;
    private CheckBox acceptBluetoothPaymentView;
    private TextView initiateRequestView;

    @CheckForNull
    private String bluetoothMac;
    @CheckForNull
    private Intent bluetoothServiceIntent;

    private static final int REQUEST_CODE_ENABLE_BLUETOOTH = 0;

    private CurrencyCalculatorLink amountCalculatorLink;

    private static final int ID_RATE_LOADER = 0;

    private static boolean ENABLE_BLUETOOTH_LISTENING = Build.VERSION.SDK_INT >= Constants.SDK_JELLY_BEAN_MR2;

    private static final Logger log = LoggerFactory.getLogger(RequestCoinsFragment.class);

    private final LoaderCallbacks<Cursor> rateLoaderCallbacks = new LoaderManager.LoaderCallbacks<Cursor>() {
        @Override
        public Loader<Cursor> onCreateLoader(final int id, final Bundle args) {
            return new ExchangeRateLoader(activity, config);
        }

        @Override
        public void onLoadFinished(final Loader<Cursor> loader, final Cursor data) {
            if (data != null && data.getCount() > 0) {
                data.moveToFirst();
                final ExchangeRate exchangeRate = ExchangeRatesProvider.getExchangeRate(data);

                amountCalculatorLink.setExchangeRate(exchangeRate);
                updateView();
            }
        }

        @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.config = application.getConfiguration();
        this.wallet = application.getWallet();
        this.loaderManager = getLoaderManager();
        this.nfcManager = (NfcManager) activity.getSystemService(Context.NFC_SERVICE);
        this.clipboardManager = (ClipboardManager) activity.getSystemService(Context.CLIPBOARD_SERVICE);
        this.bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
    }

    @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() {
            @Override
            public void onClick(final View v) {
                BitmapFragment.show(getFragmentManager(), qrCodeBitmap);
            }
        });

        final CurrencyAmountView HTML5AmountView = (CurrencyAmountView) view
                .findViewById(R.id.request_coins_amount_html5);
        HTML5AmountView.setCurrencySymbol(config.getHTML5Prefix());
        HTML5AmountView.setInputPrecision(config.getHTML5MaxPrecision());
        HTML5AmountView.setHintPrecision(config.getHTML5Precision());
        HTML5AmountView.setShift(config.getHTML5Shift());

        final CurrencyAmountView localAmountView = (CurrencyAmountView) view
                .findViewById(R.id.request_coins_amount_local);
        localAmountView.setInputPrecision(Constants.LOCAL_PRECISION);
        localAmountView.setHintPrecision(Constants.LOCAL_PRECISION);
        amountCalculatorLink = new CurrencyCalculatorLink(HTML5AmountView, localAmountView);

        acceptBluetoothPaymentView = (CheckBox) view.findViewById(R.id.request_coins_accept_bluetooth_payment);
        acceptBluetoothPaymentView
                .setVisibility(ENABLE_BLUETOOTH_LISTENING && bluetoothAdapter != null ? View.VISIBLE : View.GONE);
        acceptBluetoothPaymentView
                .setChecked(ENABLE_BLUETOOTH_LISTENING && bluetoothAdapter != null && bluetoothAdapter.isEnabled());
        acceptBluetoothPaymentView.setOnCheckedChangeListener(new OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(final CompoundButton buttonView, final boolean isChecked) {
                if (ENABLE_BLUETOOTH_LISTENING && bluetoothAdapter != null && isChecked) {
                    if (bluetoothAdapter.isEnabled()) {
                        startBluetoothListening();
                    } else {
                        // ask for permission to enable bluetooth
                        startActivityForResult(new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE),
                                REQUEST_CODE_ENABLE_BLUETOOTH);
                    }
                } else {
                    stopBluetoothListening();
                }

                updateView();
            }
        });

        initiateRequestView = (TextView) view.findViewById(R.id.request_coins_fragment_initiate_request);

        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);

        amountCalculatorLink.setExchangeDirection(config.getLastExchangeDirection());
        amountCalculatorLink.requestFocus();
    }

    @Override
    public void onResume() {
        super.onResume();

        amountCalculatorLink.setListener(new CurrencyAmountView.Listener() {
            @Override
            public void changed() {
                updateView();
            }

            @Override
            public void focusChanged(final boolean hasFocus) {
            }
        });

        loaderManager.initLoader(ID_RATE_LOADER, null, rateLoaderCallbacks);

        if (ENABLE_BLUETOOTH_LISTENING && bluetoothAdapter != null && bluetoothAdapter.isEnabled()
                && acceptBluetoothPaymentView.isChecked())
            startBluetoothListening();

        updateView();
    }

    @Override
    public void onDestroyView() {
        super.onDestroyView();

        config.setLastExchangeDirection(amountCalculatorLink.getExchangeDirection());
    }

    @Override
    public void onPause() {
        loaderManager.destroyLoader(ID_RATE_LOADER);

        Nfc.unpublish(nfcManager, activity);

        amountCalculatorLink.setListener(null);

        super.onPause();
    }

    @Override
    public void onActivityResult(final int requestCode, final int resultCode, final Intent data) {
        if (requestCode == REQUEST_CODE_ENABLE_BLUETOOTH) {
            acceptBluetoothPaymentView.setChecked(resultCode == Activity.RESULT_OK);

            if (resultCode == Activity.RESULT_OK && bluetoothAdapter != null)
                startBluetoothListening();

            if (isResumed())
                updateView();
        }
    }

    private void startBluetoothListening() {
        bluetoothMac = Bluetooth.compressMac(bluetoothAdapter.getAddress());

        bluetoothServiceIntent = new Intent(activity, AcceptBluetoothService.class);
        activity.startService(bluetoothServiceIntent);
    }

    private void stopBluetoothListening() {
        if (bluetoothServiceIntent != null) {
            activity.stopService(bluetoothServiceIntent);
            bluetoothServiceIntent = null;
        }

        bluetoothMac = null;
    }

    @Override
    public void onCreateOptionsMenu(final Menu menu, final MenuInflater inflater) {
        inflater.inflate(R.menu.request_coins_fragment_options, menu);

        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_share:
            handleShare();
            return true;

        case R.id.request_coins_options_local_app:
            handleLocalApp();
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    private void handleCopy() {
        final String request = determineHTMLcoinRequestStr(false);
        clipboardManager.setText(request);
        activity.toast(R.string.request_coins_clipboard_msg);
    }

    private void handleShare() {
        final Intent intent = new Intent(Intent.ACTION_SEND);
        intent.setType("text/plain");
        intent.putExtra(Intent.EXTRA_TEXT, determineHTMLcoinRequestStr(false));
        startActivity(Intent.createChooser(intent, getString(R.string.request_coins_share_dialog_title)));
    }

    private void handleLocalApp() {
        final Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(determineHTMLcoinRequestStr(false)));
        startActivity(intent);
        activity.finish();
    }

    private void updateView() {
        if (!isResumed())
            return;

        final String htmlcoinRequest = determineHTMLcoinRequestStr(true);
        final byte[] paymentRequest = determinePaymentRequest(true);

        // update qr-code
        final int size = (int) (256 * getResources().getDisplayMetrics().density);
        final String qrContent;
        if (config.getQrPaymentRequestEnabled())
            qrContent = "Htmlcoin:-" + Qr.encodeBinary(paymentRequest);
        else
            qrContent = htmlcoinRequest;
        qrCodeBitmap = Qr.bitmap(qrContent, size);
        qrView.setImageBitmap(qrCodeBitmap);

        // update nfc ndef message
        final boolean nfcSuccess = Nfc.publishMimeObject(nfcManager, activity,
                PaymentProtocol.MIMETYPE_PAYMENTREQUEST, paymentRequest);

        // update initiate request message
        final SpannableStringBuilder initiateText = new SpannableStringBuilder(
                getString(R.string.request_coins_fragment_initiate_request_qr));
        if (nfcSuccess)
            initiateText.append(' ').append(getString(R.string.request_coins_fragment_initiate_request_nfc));
        initiateRequestView.setText(initiateText);

        // focus linking
        final int activeAmountViewId = amountCalculatorLink.activeTextView().getId();
        acceptBluetoothPaymentView.setNextFocusUpId(activeAmountViewId);
    }

    private String determineHTMLcoinRequestStr(final boolean includeBluetoothMac) {
        final Address address = application.determineSelectedAddress();
        final BigInteger amount = amountCalculatorLink.getAmount();

        final StringBuilder uri = new StringBuilder(HTMLcoinURI.convertToHTMLcoinURI(address, amount, null, null));
        if (includeBluetoothMac && bluetoothMac != null) {
            uri.append(amount == null ? '?' : '&');
            uri.append(Bluetooth.MAC_URI_PARAM).append('=').append(bluetoothMac);
        }
        return uri.toString();
    }

    private byte[] determinePaymentRequest(final boolean includeBluetoothMac) {
        final Address address = application.determineSelectedAddress();
        final BigInteger amount = amountCalculatorLink.getAmount();

        return PaymentProtocol.createPaymentRequest(amount, address, null,
                includeBluetoothMac && bluetoothMac != null ? "bt:" + bluetoothMac : null).toByteArray();
    }
}