com.kncwallet.wallet.ui.WalletAddressFragment.java Source code

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Here is the source code for com.kncwallet.wallet.ui.WalletAddressFragment.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.kncwallet.wallet.ui;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
import android.graphics.Bitmap;
import android.nfc.NfcManager;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnLongClickListener;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import com.google.bitcoin.core.Address;
import com.google.bitcoin.uri.BitcoinURI;
import com.kncwallet.wallet.Constants;
import com.kncwallet.wallet.WalletApplication;
import com.kncwallet.wallet.util.BitmapFragment;
import com.kncwallet.wallet.util.Nfc;
import com.kncwallet.wallet.util.Qr;
import com.kncwallet.wallet.util.WalletUtils;

import com.kncwallet.wallet.R;

/**
 * @author Andreas Schildbach
 */
public final class WalletAddressFragment extends Fragment {
    private FragmentActivity activity;
    private WalletApplication application;
    private SharedPreferences prefs;
    private NfcManager nfcManager;

    private View bitcoinAddressButton;
    private TextView bitcoinAddressLabel;
    private ImageView bitcoinAddressQrView;

    private Address lastSelectedAddress;

    private Bitmap qrCodeBitmap;

    @Override
    public void onAttach(final Activity activity) {
        super.onAttach(activity);

        this.activity = (FragmentActivity) activity;
        this.application = (WalletApplication) activity.getApplication();
        this.prefs = PreferenceManager.getDefaultSharedPreferences(activity);
        this.nfcManager = (NfcManager) activity.getSystemService(Context.NFC_SERVICE);
    }

    @Override
    public View onCreateView(final LayoutInflater inflater, final ViewGroup container,
            final Bundle savedInstanceState) {
        final View view = inflater.inflate(R.layout.wallet_address_fragment, container, false);
        bitcoinAddressLabel = (TextView) view.findViewById(R.id.bitcoin_address_label);
        bitcoinAddressQrView = (ImageView) view.findViewById(R.id.bitcoin_address_qr);

        bitcoinAddressQrView.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(final View v) {
                handleShowQRCode();
            }
        });

        return view;
    }

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

        prefs.registerOnSharedPreferenceChangeListener(prefsListener);

        updateView();
    }

    @Override
    public void onPause() {
        prefs.unregisterOnSharedPreferenceChangeListener(prefsListener);

        Nfc.unpublish(nfcManager, getActivity());

        super.onPause();
    }

    private void updateView() {
        final Address selectedAddress = application.determineSelectedAddress();

        if (!selectedAddress.equals(lastSelectedAddress)) {
            lastSelectedAddress = selectedAddress;

            bitcoinAddressLabel.setText(WalletUtils.formatAddress(selectedAddress,
                    Constants.ADDRESS_FORMAT_GROUP_SIZE, Constants.ADDRESS_FORMAT_LINE_SIZE));

            final String addressStr = BitcoinURI.convertToBitcoinURI(selectedAddress, null, null, null);

            final int size = (int) (256 * getResources().getDisplayMetrics().density);
            qrCodeBitmap = Qr.bitmap(addressStr, size);
            bitcoinAddressQrView.setImageBitmap(qrCodeBitmap);

            Nfc.publishUri(nfcManager, getActivity(), addressStr);
        }
    }

    private void handleShowQRCode() {
        BitmapFragment.show(getFragmentManager(), qrCodeBitmap);
    }

    private final OnSharedPreferenceChangeListener prefsListener = new OnSharedPreferenceChangeListener() {
        @Override
        public void onSharedPreferenceChanged(final SharedPreferences sharedPreferences, final String key) {
            if (Constants.PREFS_KEY_SELECTED_ADDRESS.equals(key))
                updateView();
        }
    };
}