WalletBalanceFragment.java example

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devcoin-android-master
- devcoin-wallet
- devcoinj
/*
 * 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 devcoin.wallet.ui;

import android.app.Activity;
import android.content.*;
import android.database.Cursor;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.support.v4.app.Fragment;
import android.support.v4.app.LoaderManager;
import android.support.v4.app.LoaderManager.LoaderCallbacks;
import android.support.v4.content.Loader;
import android.text.format.DateUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import android.widget.TextView;
import com.google.devcoin.core.Wallet;
import devcoin.wallet.Constants;
import devcoin.wallet.ExchangeRatesProvider;
import devcoin.wallet.ExchangeRatesProvider.ExchangeRate;
import devcoin.wallet.R;
import devcoin.wallet.WalletApplication;
import devcoin.wallet.service.BlockchainService;
import devcoin.wallet.util.WalletUtils;

import javax.annotation.CheckForNull;
import java.math.BigInteger;
import java.util.Date;

/**
 * @author Andreas Schildbach
 */
public final class WalletBalanceFragment extends Fragment
{
	private WalletApplication application;
	private AbstractWalletActivity activity;
	private Wallet wallet;
	private SharedPreferences prefs;
	private LoaderManager loaderManager;

	private View viewBalance;
	private CurrencyTextView viewBalanceBtc;
	private FrameLayout viewBalanceLocalFrame;
	private CurrencyTextView viewBalanceLocal;
	private TextView viewProgress;

	private boolean showLocalBalance;

	@CheckForNull
	private BigInteger balance = null;
	@CheckForNull
	private ExchangeRate exchangeRate = null;

	private int download;
	@CheckForNull
	private Date bestChainDate = null;
	private boolean replaying = false;

	private static final int ID_BALANCE_LOADER = 0;
	private static final int ID_RATE_LOADER = 1;

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

		this.activity = (AbstractWalletActivity) activity;
		this.application = (WalletApplication) activity.getApplication();
		this.wallet = application.getWallet();
		this.prefs = PreferenceManager.getDefaultSharedPreferences(activity);
		this.loaderManager = getLoaderManager();

		showLocalBalance = getResources().getBoolean(R.bool.show_local_balance);
	}

	@Override
	public View onCreateView(final LayoutInflater inflater, final ViewGroup container, final Bundle savedInstanceState)
	{
		return inflater.inflate(R.layout.wallet_balance_fragment, container, false);
	}

	@Override
	public void onViewCreated(final View view, final Bundle savedInstanceState)
	{
		super.onViewCreated(view, savedInstanceState);

		final boolean showExchangeRatesOption = getResources().getBoolean(R.bool.show_exchange_rates_option);

		viewBalance = view.findViewById(R.id.wallet_balance);
		if (showExchangeRatesOption)
		{
			viewBalance.setOnClickListener(new OnClickListener()
			{
				@Override
				public void onClick(final View v)
				{
					startActivity(new Intent(getActivity(), ExchangeRatesActivity.class));
				}
			});
		}
		else
		{
			viewBalance.setEnabled(false);
		}

		viewBalanceBtc = (CurrencyTextView) view.findViewById(R.id.wallet_balance_btc);
        viewBalanceBtc.setPrecision(2, 0);
		viewBalanceLocalFrame = (FrameLayout) view.findViewById(R.id.wallet_balance_local_frame);
		if (showExchangeRatesOption)
			viewBalanceLocalFrame.setForeground(getResources().getDrawable(R.drawable.dropdown_ic_arrow_small));

		viewBalanceLocal = (CurrencyTextView) view.findViewById(R.id.wallet_balance_local);
		viewBalanceLocal.setPrecision(Constants.LOCAL_PRECISION, 0);
		viewBalanceLocal.setInsignificantRelativeSize(1);
		viewBalanceLocal.setStrikeThru(Constants.TEST);

		viewProgress = (TextView) view.findViewById(R.id.wallet_balance_progress);
	}

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

		activity.registerReceiver(broadcastReceiver, new IntentFilter(BlockchainService.ACTION_BLOCKCHAIN_STATE));

		loaderManager.initLoader(ID_BALANCE_LOADER, null, balanceLoaderCallbacks);
		loaderManager.initLoader(ID_RATE_LOADER, null, rateLoaderCallbacks);

		updateView();
	}

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

		activity.unregisterReceiver(broadcastReceiver);

		super.onPause();
	}

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

		final boolean showProgress;

		if (bestChainDate != null)
		{
			final long blockchainLag = System.currentTimeMillis() - bestChainDate.getTime();
			final boolean blockchainUptodate = blockchainLag < Constants.BLOCKCHAIN_UPTODATE_THRESHOLD_MS;
			final boolean downloadOk = download == BlockchainService.ACTION_BLOCKCHAIN_STATE_DOWNLOAD_OK;

			showProgress = !(blockchainUptodate || !replaying);

			final String downloading = getString(downloadOk ? R.string.blockchain_state_progress_downloading
					: R.string.blockchain_state_progress_stalled);

			if (blockchainLag < 2 * DateUtils.DAY_IN_MILLIS)
			{
				final long hours = blockchainLag / DateUtils.HOUR_IN_MILLIS;
				viewProgress.setText(getString(R.string.blockchain_state_progress_hours, downloading, hours));
			}
			else if (blockchainLag < 2 * DateUtils.WEEK_IN_MILLIS)
			{
				final long days = blockchainLag / DateUtils.DAY_IN_MILLIS;
				viewProgress.setText(getString(R.string.blockchain_state_progress_days, downloading, days));
			}
			else if (blockchainLag < 90 * DateUtils.DAY_IN_MILLIS)
			{
				final long weeks = blockchainLag / DateUtils.WEEK_IN_MILLIS;
				viewProgress.setText(getString(R.string.blockchain_state_progress_weeks, downloading, weeks));
			}
			else
			{
				final long months = blockchainLag / (30 * DateUtils.DAY_IN_MILLIS);
				viewProgress.setText(getString(R.string.blockchain_state_progress_months, downloading, months));
			}
		}
		else
		{
			showProgress = false;
		}

		if (!showProgress)
		{
			viewBalance.setVisibility(View.VISIBLE);

			if (!showLocalBalance)
				viewBalanceLocalFrame.setVisibility(View.GONE);

			if (balance != null)
			{
				final String precision = prefs.getString(Constants.PREFS_KEY_BTC_PRECISION, Constants.PREFS_DEFAULT_BTC_PRECISION);
				final int btcPrecision = precision.charAt(0) - '0';
				final int btcShift = precision.length() == 3 ? precision.charAt(2) - '0' : 0;
				final String prefix = btcShift == 0 ? Constants.CURRENCY_CODE_BTC : Constants.CURRENCY_CODE_MBTC;

				viewBalanceBtc.setVisibility(View.VISIBLE);
				viewBalanceBtc.setPrecision(btcPrecision, btcShift);
				viewBalanceBtc.setPrefix(prefix);
				viewBalanceBtc.setAmount(balance);

				if (showLocalBalance)
				{
					if (exchangeRate != null)
					{
						final BigInteger localValue = WalletUtils.localValue(balance, exchangeRate.rate);
						viewBalanceLocalFrame.setVisibility(View.VISIBLE);
						viewBalanceLocal.setPrefix(Constants.PREFIX_ALMOST_EQUAL_TO + exchangeRate.currencyCode);
						viewBalanceLocal.setAmount(localValue);
						viewBalanceLocal.setTextColor(getResources().getColor(R.color.fg_less_significant));
					}
					else
					{
						viewBalanceLocalFrame.setVisibility(View.INVISIBLE);
					}
				}
			}
			else
			{
				viewBalanceBtc.setVisibility(View.INVISIBLE);
			}

			viewProgress.setVisibility(View.GONE);
		}
		else
		{
			viewProgress.setVisibility(View.VISIBLE);
			viewBalance.setVisibility(View.INVISIBLE);
		}
	}

	private final BlockchainBroadcastReceiver broadcastReceiver = new BlockchainBroadcastReceiver();

	private final class BlockchainBroadcastReceiver extends BroadcastReceiver
	{
		@Override
		public void onReceive(final Context context, final Intent intent)
		{
			download = intent.getIntExtra(BlockchainService.ACTION_BLOCKCHAIN_STATE_DOWNLOAD, BlockchainService.ACTION_BLOCKCHAIN_STATE_DOWNLOAD_OK);
			bestChainDate = (Date) intent.getSerializableExtra(BlockchainService.ACTION_BLOCKCHAIN_STATE_BEST_CHAIN_DATE);
			replaying = intent.getBooleanExtra(BlockchainService.ACTION_BLOCKCHAIN_STATE_REPLAYING, false);

			updateView();
		}
	}

	private final LoaderCallbacks<BigInteger> balanceLoaderCallbacks = new LoaderManager.LoaderCallbacks<BigInteger>()
	{
		@Override
		public Loader<BigInteger> onCreateLoader(final int id, final Bundle args)
		{
			return new WalletBalanceLoader(activity, wallet);
		}

		@Override
		public void onLoadFinished(final Loader<BigInteger> loader, final BigInteger balance)
		{
			WalletBalanceFragment.this.balance = balance;

			updateView();
		}

		@Override
		public void onLoaderReset(final Loader<BigInteger> loader)
		{
		}
	};

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

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

		@Override
		public void onLoaderReset(final Loader<Cursor> loader)
		{
		}
	};
}