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.goldcoin.ui; import java.util.Date; import java.util.concurrent.atomic.AtomicBoolean; import android.app.Activity; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.content.SharedPreferences; import android.content.SharedPreferences.OnSharedPreferenceChangeListener; import android.os.Bundle; import android.os.Handler; import android.preference.PreferenceManager; import android.support.v4.app.Fragment; import android.text.Html; 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.TextView; import de.schildbach.wallet.goldcoin.Constants; import de.schildbach.wallet.goldcoin.service.BlockchainService; import de.schildbach.wallet.goldcoin.R; /** * @author Andreas Schildbach */ public final class BlockchainStateFragment extends Fragment implements OnSharedPreferenceChangeListener { private WalletActivity activity; private SharedPreferences prefs; private TextView disclaimerView; private TextView progressView; private View replayingView; private int download; private Date bestChainDate; private boolean replaying; private final Handler delayMessageHandler = new Handler(); private final class BlockchainBroadcastReceiver extends BroadcastReceiver { public AtomicBoolean active = new AtomicBoolean(false); @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); if (active.get()) updateView(); } } private final BlockchainBroadcastReceiver broadcastReceiver = new BlockchainBroadcastReceiver(); @Override public void onAttach(final Activity activity) { super.onAttach(activity); this.activity = (WalletActivity) activity; // prefs = PreferenceManager.getDefaultSharedPreferences(activity); } @Override public View onCreateView(final LayoutInflater inflater, final ViewGroup container, final Bundle savedInstanceState) { final View view = inflater.inflate(R.layout.blockchain_state_fragment, container); disclaimerView = (TextView) view.findViewById(R.id.blockchain_state_disclaimer); disclaimerView.setText(Html.fromHtml(getString(R.string.blockchain_state_disclaimer))); disclaimerView.setOnClickListener(new OnClickListener() { public void onClick(final View v) { activity.showDialog(WalletActivity.DIALOG_SAFETY); } }); progressView = (TextView) view.findViewById(R.id.blockchain_state_progress); replayingView = view.findViewById(R.id.blockchain_state_replaying); final View requestButton = view.findViewById(R.id.wallet_actions_request); requestButton.setOnClickListener(new OnClickListener() { public void onClick(final View v) { activity.handleRequestCoins(); } }); final View sendButton = view.findViewById(R.id.wallet_actions_send); sendButton.setOnClickListener(new OnClickListener() { public void onClick(final View v) { activity.handleSendCoins(); } }); return view; } @Override public void onResume() { super.onResume(); activity.registerReceiver(broadcastReceiver, new IntentFilter(BlockchainService.ACTION_BLOCKCHAIN_STATE)); broadcastReceiver.active.set(true); updateView(); } @Override public void onPause() { broadcastReceiver.active.set(false); activity.unregisterReceiver(broadcastReceiver); super.onPause(); } @Override public void onDestroy() { delayMessageHandler.removeCallbacksAndMessages(null); super.onDestroy(); } public void onSharedPreferenceChanged(final SharedPreferences sharedPreferences, final String key) { if (Constants.PREFS_KEY_DISCLAIMER.equals(key)) updateView(); } private void updateView() { final boolean disclaimer = prefs.getBoolean(Constants.PREFS_KEY_DISCLAIMER, true); final boolean showDisclaimer; final boolean showProgress; if (download != BlockchainService.ACTION_BLOCKCHAIN_STATE_DOWNLOAD_OK) { showDisclaimer = false; showProgress = true; if ((download & BlockchainService.ACTION_BLOCKCHAIN_STATE_DOWNLOAD_STORAGE_PROBLEM) != 0) progressView.setText(R.string.blockchain_state_progress_problem_storage); else if ((download & BlockchainService.ACTION_BLOCKCHAIN_STATE_DOWNLOAD_POWER_PROBLEM) != 0) progressView.setText(R.string.blockchain_state_progress_problem_power); else if ((download & BlockchainService.ACTION_BLOCKCHAIN_STATE_DOWNLOAD_NETWORK_PROBLEM) != 0) progressView.setText(R.string.blockchain_state_progress_problem_network); } else if (bestChainDate != null) { final long blockchainLag = System.currentTimeMillis() - bestChainDate.getTime(); final boolean blockchainUptodate = blockchainLag < Constants.BLOCKCHAIN_UPTODATE_THRESHOLD_MS; showProgress = !blockchainUptodate; showDisclaimer = blockchainUptodate && disclaimer; final String downloading = getString(R.string.blockchain_state_progress_downloading); final String stalled = getString(R.string.blockchain_state_progress_stalled); final String stalledText; if (blockchainLag < 2 * DateUtils.DAY_IN_MILLIS) { final long hours = blockchainLag / DateUtils.HOUR_IN_MILLIS; progressView.setText(getString(R.string.blockchain_state_progress_hours, downloading, hours)); stalledText = getString(R.string.blockchain_state_progress_hours, stalled, hours); } else if (blockchainLag < 2 * DateUtils.WEEK_IN_MILLIS) { final long days = blockchainLag / DateUtils.DAY_IN_MILLIS; progressView.setText(getString(R.string.blockchain_state_progress_days, downloading, days)); stalledText = getString(R.string.blockchain_state_progress_days, stalled, days); } else if (blockchainLag < 90 * DateUtils.DAY_IN_MILLIS) { final long weeks = blockchainLag / DateUtils.WEEK_IN_MILLIS; progressView.setText(getString(R.string.blockchain_state_progress_weeks, downloading, weeks)); stalledText = getString(R.string.blockchain_state_progress_weeks, stalled, weeks); } else { final long months = blockchainLag / (30 * DateUtils.DAY_IN_MILLIS); progressView.setText(getString(R.string.blockchain_state_progress_months, downloading, months)); stalledText = getString(R.string.blockchain_state_progress_months, stalled, months); } delayMessageHandler.removeCallbacksAndMessages(null); delayMessageHandler.postDelayed(new Runnable() { public void run() { progressView.setText(stalledText); } }, Constants.BLOCKCHAIN_DOWNLOAD_THRESHOLD_MS); } else { showDisclaimer = disclaimer; showProgress = false; } final boolean showReplaying = replaying; disclaimerView.setVisibility(showDisclaimer ? View.VISIBLE : View.GONE); progressView.setVisibility(showProgress ? View.VISIBLE : View.GONE); replayingView.setVisibility(showReplaying ? View.VISIBLE : View.GONE); getView().setVisibility( View.VISIBLE /*showDisclaimer || showProgress || showReplaying ? View.VISIBLE : View.GONE*/); } }