Example usage for android.os PowerManager PARTIAL_WAKE_LOCK

Introduction

In this page you can find the example usage for android.os PowerManager PARTIAL_WAKE_LOCK.

Prototype

int PARTIAL_WAKE_LOCK

To view the source code for android.os PowerManager PARTIAL_WAKE_LOCK.

Click Source Link

Document

Wake lock level: Ensures that the CPU is running; the screen and keyboard backlight will be allowed to go off.

Usage

From source file:devcoin.wallet.service.BlockchainServiceImpl.java

@Override
public void onCreate() {
    serviceCreatedAt = System.currentTimeMillis();
    log.debug(".onCreate()");

    super.onCreate();

    nm = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

    final String lockName = getPackageName() + " blockchain sync";

    final PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
    wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, lockName);

    final WifiManager wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
    wifiLock = wifiManager.createWifiLock(WifiManager.WIFI_MODE_FULL, lockName);
    wifiLock.setReferenceCounted(false);

    application = (WalletApplication) getApplication();
    prefs = PreferenceManager.getDefaultSharedPreferences(this);
    final Wallet wallet = application.getWallet();

    bestChainHeightEver = prefs.getInt(Constants.PREFS_KEY_BEST_CHAIN_HEIGHT_EVER, 0);

    peerConnectivityListener = new PeerConnectivityListener();

    sendBroadcastPeerState(0);/*www .jav  a 2s  .c  o  m*/

    final IntentFilter intentFilter = new IntentFilter();
    intentFilter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
    intentFilter.addAction(Intent.ACTION_DEVICE_STORAGE_LOW);
    intentFilter.addAction(Intent.ACTION_DEVICE_STORAGE_OK);
    registerReceiver(connectivityReceiver, intentFilter);

    blockChainFile = new File(getDir("blockstore", Context.MODE_PRIVATE), Constants.BLOCKCHAIN_FILENAME);
    final boolean blockChainFileExists = blockChainFile.exists();

    if (!blockChainFileExists) {
        log.info("blockchain does not exist, resetting wallet");

        wallet.clearTransactions(0);
        wallet.setLastBlockSeenHeight(-1); // magic value
        wallet.setLastBlockSeenHash(null);
    }

    try {
        blockStore = new SPVBlockStore(Constants.NETWORK_PARAMETERS, blockChainFile);
        blockStore.getChainHead(); // detect corruptions as early as possible

        final long earliestKeyCreationTime = wallet.getEarliestKeyCreationTime();

        if (!blockChainFileExists && earliestKeyCreationTime > 0) {
            try {
                final InputStream checkpointsInputStream = getAssets().open(Constants.CHECKPOINTS_FILENAME);
                CheckpointManager.checkpoint(Constants.NETWORK_PARAMETERS, checkpointsInputStream, blockStore,
                        earliestKeyCreationTime);
            } catch (final IOException x) {
                log.error("problem reading checkpoints, continuing without", x);
            }
        }
    } catch (final BlockStoreException x) {
        blockChainFile.delete();

        final String msg = "blockstore cannot be created";
        log.error(msg, x);
        throw new Error(msg, x);
    }

    log.info("using " + blockStore.getClass().getName());

    try {
        blockChain = new BlockChain(Constants.NETWORK_PARAMETERS, wallet, blockStore);
    } catch (final BlockStoreException x) {
        throw new Error("blockchain cannot be created", x);
    }

    application.getWallet().addEventListener(walletEventListener);

    registerReceiver(tickReceiver, new IntentFilter(Intent.ACTION_TIME_TICK));

    maybeRotateKeys();
}

---

From source file:com.bushstar.htmlcoin_android_wallet.service.BlockchainServiceImpl.java

@Override
public void onCreate() {
    serviceCreatedAt = System.currentTimeMillis();
    log.debug(".onCreate()");

    super.onCreate();

    nm = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

    final String lockName = getPackageName() + " blockchain sync";

    final PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
    wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, lockName);

    application = (WalletApplication) getApplication();
    config = application.getConfiguration();
    final Wallet wallet = application.getWallet();

    bestChainHeightEver = config.getBestChainHeightEver();

    peerConnectivityListener = new PeerConnectivityListener();

    sendBroadcastPeerState(0);/*from  ww w  . j  a  v  a 2s. c o  m*/

    final IntentFilter intentFilter = new IntentFilter();
    intentFilter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
    intentFilter.addAction(Intent.ACTION_DEVICE_STORAGE_LOW);
    intentFilter.addAction(Intent.ACTION_DEVICE_STORAGE_OK);
    registerReceiver(connectivityReceiver, intentFilter);

    blockChainFile = new File(getDir("blockstore", Context.MODE_PRIVATE), Constants.BLOCKCHAIN_FILENAME);
    final boolean blockChainFileExists = blockChainFile.exists();

    if (!blockChainFileExists) {
        log.info("blockchain does not exist, resetting wallet");

        wallet.clearTransactions(0);
        wallet.setLastBlockSeenHeight(-1); // magic value
        wallet.setLastBlockSeenHash(null);
    }

    try {
        blockStore = new SPVBlockStore(Constants.NETWORK_PARAMETERS, blockChainFile);
        blockStore.getChainHead(); // detect corruptions as early as possible
    } catch (final BlockStoreException x) {
        blockChainFile.delete();

        final String msg = "blockstore cannot be created";
        log.error(msg, x);
        throw new Error(msg, x);
    }

    log.info("using " + blockStore.getClass().getName());

    validHashStoreFile = new File(getDir("validhashes", Context.MODE_PRIVATE), Constants.VALID_HASHES_FILENAME);

    try {
        validHashStore = new ValidHashStore(validHashStoreFile);
    } catch (IOException x) {
        validHashStoreFile.delete();
        final String msg = "validhashstore cannot be created";
        log.error(msg, x);
        throw new Error(msg, x);
    }

    try {
        blockChain = new BlockChain(Constants.NETWORK_PARAMETERS, wallet, blockStore, validHashStore);
    } catch (final BlockStoreException x) {
        throw new Error("blockchain cannot be created", x);
    }

    application.getWallet().addEventListener(walletEventListener, Threading.SAME_THREAD);

    registerReceiver(tickReceiver, new IntentFilter(Intent.ACTION_TIME_TICK));

    maybeRotateKeys();
}

---

From source file:com.bernard.beaconportal.activities.activity.MessageList.java

/**
 * This class is responsible for reloading the list of local messages for a
 * given folder, notifying the adapter that the message have been loaded and
 * queueing up a remote update of the folder.
 *//* ww  w  . j  av  a2  s .  c o m*/

private void checkMail(FolderInfoHolder folder) {
    TracingPowerManager pm = TracingPowerManager.getPowerManager(this);
    final TracingWakeLock wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "FolderList checkMail");
    wakeLock.setReferenceCounted(false);
    wakeLock.acquire(K9.WAKE_LOCK_TIMEOUT);
    MessagingListener listener = new MessagingListener() {
        @Override
        public void synchronizeMailboxFinished(Account account, String folder, int totalMessagesInMailbox,
                int numNewMessages) {
            if (!account.equals(mAccount)) {
                return;
            }
            wakeLock.release();
        }

        @Override
        public void synchronizeMailboxFailed(Account account, String folder, String message) {
            if (!account.equals(mAccount)) {
                return;
            }
            wakeLock.release();
        }
    };
    MessagingController.getInstance(getApplication()).synchronizeMailbox(mAccount, folder.name, listener, null);
    sendMail(mAccount);
}

---

From source file:de.schildbach.litecoinwallet.service.BlockchainServiceImpl.java

@Override
public void onCreate() {
    serviceCreatedAt = System.currentTimeMillis();
    log.debug(".onCreate()");

    super.onCreate();

    nm = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

    final String lockName = getPackageName() + " blockchain sync";

    final PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
    wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, lockName);

    final WifiManager wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
    wifiLock = wifiManager.createWifiLock(WifiManager.WIFI_MODE_FULL, lockName);
    wifiLock.setReferenceCounted(false);

    application = (WalletApplication) getApplication();
    prefs = PreferenceManager.getDefaultSharedPreferences(this);
    final Wallet wallet = application.getWallet();

    bestChainHeightEver = prefs.getInt(Constants.PREFS_KEY_BEST_CHAIN_HEIGHT_EVER, 0);

    peerConnectivityListener = new PeerConnectivityListener();

    sendBroadcastPeerState(0);//from   w  w  w.j  a  va  2 s. co  m

    final IntentFilter intentFilter = new IntentFilter();
    intentFilter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
    intentFilter.addAction(Intent.ACTION_DEVICE_STORAGE_LOW);
    intentFilter.addAction(Intent.ACTION_DEVICE_STORAGE_OK);
    registerReceiver(connectivityReceiver, intentFilter);

    blockChainFile = new File(getDir("blockstore", Context.MODE_PRIVATE), Constants.BLOCKCHAIN_FILENAME);
    final boolean blockChainFileExists = blockChainFile.exists();

    if (!blockChainFileExists) {
        log.info("blockchain does not exist, resetting litecoinwallet");

        wallet.clearTransactions(0);
        wallet.setLastBlockSeenHeight(-1); // magic value
        wallet.setLastBlockSeenHash(null);
    }

    try {
        blockStore = new SPVBlockStore(Constants.NETWORK_PARAMETERS, blockChainFile);
        blockStore.getChainHead(); // detect corruptions as early as possible

        final long earliestKeyCreationTime = wallet.getEarliestKeyCreationTime();

        if (!blockChainFileExists && earliestKeyCreationTime > 0) {
            try {
                final InputStream checkpointsInputStream = getAssets().open(Constants.CHECKPOINTS_FILENAME);
                CheckpointManager.checkpoint(Constants.NETWORK_PARAMETERS, checkpointsInputStream, blockStore,
                        earliestKeyCreationTime);
            } catch (final IOException x) {
                log.error("problem reading checkpoints, continuing without", x);
            }
        }
    } catch (final BlockStoreException x) {
        blockChainFile.delete();

        final String msg = "blockstore cannot be created";
        log.error(msg, x);
        throw new Error(msg, x);
    }

    log.info("using " + blockStore.getClass().getName());

    try {
        blockChain = new BlockChain(Constants.NETWORK_PARAMETERS, wallet, blockStore);
    } catch (final BlockStoreException x) {
        throw new Error("blockchain cannot be created", x);
    }

    application.getWallet().addEventListener(walletEventListener);

    registerReceiver(tickReceiver, new IntentFilter(Intent.ACTION_TIME_TICK));

    maybeRotateKeys();
}

---

From source file:ja.keystore00.wallet.service.BlockchainServiceImpl.java

@Override
public void onCreate() {
    serviceCreatedAt = System.currentTimeMillis();
    log.debug(".onCreate()");

    super.onCreate();

    nm = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

    final String lockName = getPackageName() + " blockchain sync";

    final PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
    wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, lockName);

    application = (WalletApplication) getApplication();
    prefs = PreferenceManager.getDefaultSharedPreferences(this);
    final Wallet wallet = application.getWallet();

    bestChainHeightEver = prefs.getInt(Constants.PREFS_KEY_BEST_CHAIN_HEIGHT_EVER, 0);

    peerConnectivityListener = new PeerConnectivityListener();

    sendBroadcastPeerState(0);//from  ww  w .  jav a2  s.  c  o  m

    final IntentFilter intentFilter = new IntentFilter();
    intentFilter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
    intentFilter.addAction(Intent.ACTION_DEVICE_STORAGE_LOW);
    intentFilter.addAction(Intent.ACTION_DEVICE_STORAGE_OK);
    registerReceiver(connectivityReceiver, intentFilter);

    blockChainFile = new File(getDir("blockstore", Context.MODE_PRIVATE), Constants.BLOCKCHAIN_FILENAME);
    final boolean blockChainFileExists = blockChainFile.exists();

    if (!blockChainFileExists) {
        log.info("blockchain does not exist, resetting wallet");

        wallet.clearTransactions(0);
        wallet.setLastBlockSeenHeight(-1); // magic value
        wallet.setLastBlockSeenHash(null);
    }

    try {
        blockStore = new SPVBlockStore(Constants.NETWORK_PARAMETERS, blockChainFile);
        blockStore.getChainHead(); // detect corruptions as early as possible

        final long earliestKeyCreationTime = wallet.getEarliestKeyCreationTime();

        if (!blockChainFileExists && earliestKeyCreationTime > 0) {
            try {
                final InputStream checkpointsInputStream = getAssets().open(Constants.CHECKPOINTS_FILENAME);
                CheckpointManager.checkpoint(Constants.NETWORK_PARAMETERS, checkpointsInputStream, blockStore,
                        earliestKeyCreationTime);
            } catch (final IOException x) {
                log.error("problem reading checkpoints, continuing without", x);
            }
        }
    } catch (final BlockStoreException x) {
        blockChainFile.delete();

        final String msg = "blockstore cannot be created";
        log.error(msg, x);
        throw new Error(msg, x);
    }

    log.info("using " + blockStore.getClass().getName());

    try {
        blockChain = new BlockChain(Constants.NETWORK_PARAMETERS, wallet, blockStore);
    } catch (final BlockStoreException x) {
        throw new Error("blockchain cannot be created", x);
    }

    application.getWallet().addEventListener(walletEventListener, Threading.SAME_THREAD);

    registerReceiver(tickReceiver, new IntentFilter(Intent.ACTION_TIME_TICK));

    maybeRotateKeys();
}

---

From source file:com.matthewmitchell.peercoin_android_wallet.service.BlockchainServiceImpl.java

@Override
public void onCreate() {
    serviceCreatedAt = System.currentTimeMillis();
    log.debug(".onCreate()");

    super.onCreate();

    nm = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

    final String lockName = getPackageName() + " blockchain sync";

    final PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
    wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, lockName);

    application = (WalletApplication) getApplication();

    // Sometimes the application is not loaded for some reason, even though assertions of config != null do not fail.
    // Only solution here then is to work around the problem by only using the configuration when the application is loaded
    // Maybe it's because Android is stupid, or am I?

    application.setOnLoadedCallback(new Runnable() {

        @Override/*from  w  w w .j a  v a2 s  . c  o  m*/
        public void run() {

            config = application.getConfiguration();
            peerConnectivityListener = new PeerConnectivityListener();
            broadcastPeerState(0);

            application.getWallet().addEventListener(walletEventListener, Threading.SAME_THREAD);
            registerReceiver(tickReceiver, new IntentFilter(Intent.ACTION_TIME_TICK));

            loadBlockchain = new BlockchainLoader(BlockchainServiceImpl.this, application);
            loadBlockchain.registerListener(0, BlockchainServiceImpl.this);
            loadBlockchain.startLoading();

        }

    });

    final IntentFilter intentFilter = new IntentFilter();
    intentFilter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
    intentFilter.addAction(Intent.ACTION_DEVICE_STORAGE_LOW);
    intentFilter.addAction(Intent.ACTION_DEVICE_STORAGE_OK);
    registerReceiver(connectivityReceiver, intentFilter);

}

---

From source file:com.mybitcoin.wallet.service.BlockchainServiceImpl.java

@Override
public void onCreate() {
    serviceCreatedAt = System.currentTimeMillis();
    //      log.debug(".onCreate()");

    super.onCreate();

    nm = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

    final String lockName = getPackageName() + " blockchain sync";

    final PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
    wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, lockName);

    application = (WalletApplication) getApplication();
    config = application.getConfiguration();
    final Wallet wallet = application.getWallet();

    bestChainHeightEver = config.getBestChainHeightEver();

    peerConnectivityListener = new PeerConnectivityListener();

    sendBroadcastPeerState(0);/* w  ww .  jav  a2s . c  om*/

    final IntentFilter intentFilter = new IntentFilter();
    intentFilter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
    intentFilter.addAction(Intent.ACTION_DEVICE_STORAGE_LOW);
    intentFilter.addAction(Intent.ACTION_DEVICE_STORAGE_OK);
    registerReceiver(connectivityReceiver, intentFilter);

    blockChainFile = new File(getDir("blockstore", Context.MODE_PRIVATE), Constants.BLOCKCHAIN_FILENAME);
    final boolean blockChainFileExists = blockChainFile.exists();

    if (!blockChainFileExists) {
        log.info("blockchain does not exist, resetting wallet");

        wallet.clearTransactions(0);
        wallet.setLastBlockSeenHeight(-1); // magic value
        wallet.setLastBlockSeenHash(null);
    }

    try {
        blockStore = new SPVBlockStore(Constants.NETWORK_PARAMETERS, blockChainFile);
        blockStore.getChainHead(); // detect corruptions as early as possible

        final long earliestKeyCreationTime = wallet.getEarliestKeyCreationTime();

        if (!blockChainFileExists && earliestKeyCreationTime > 0) {
            try {
                final InputStream checkpointsInputStream = getAssets().open(Constants.CHECKPOINTS_FILENAME);
                CheckpointManager.checkpoint(Constants.NETWORK_PARAMETERS, checkpointsInputStream, blockStore,
                        earliestKeyCreationTime);
            } catch (final IOException x) {
                log.error("problem reading checkpoints, continuing without", x);
            }
        }
    } catch (final BlockStoreException x) {
        blockChainFile.delete();

        final String msg = "blockstore cannot be created";
        log.error(msg, x);
        throw new Error(msg, x);
    }

    log.info("using " + blockStore.getClass().getName());

    try {
        blockChain = new BlockChain(Constants.NETWORK_PARAMETERS, wallet, blockStore);
    } catch (final BlockStoreException x) {
        throw new Error("blockchain cannot be created", x);
    }

    application.getWallet().addEventListener(walletEventListener, Threading.SAME_THREAD);

    registerReceiver(tickReceiver, new IntentFilter(Intent.ACTION_TIME_TICK));

    maybeRotateKeys();
}

---

From source file:crea.wallet.lite.service.CreativeCoinService.java

@Override
public void onCreate() {
    serviceCreatedAt = System.currentTimeMillis();
    super.onCreate();

    boolean startService = WalletHelper.INSTANCE != null;

    transactionsReceived = new HashMap<>();
    Log.e(TAG, "START_SERVICE=" + startService);
    if (startService) {
        nm = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

        WalletHelper.INSTANCE.autoSave(10);
        final String lockName = getPackageName() + " blockchain sync";

        final PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
        wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, lockName);
        application = WalletApplication.INSTANCE;

        setWalletListener();/*w  w w.  j ava 2 s.com*/

        peerConnectivityListener = new PeerConnectivityListener();

        blockChainFile = Constants.WALLET.BLOCKCHAIN_FILE;
        final boolean blockChainFileExists = blockChainFile.exists();

        if (!blockChainFileExists) {
            new File(Constants.WALLET.WALLET_PATH).mkdirs();
        }
        try {
            blockStore = new SPVBlockStore(NETWORK_PARAMETERS, blockChainFile);
            blockStore.getChainHead(); // detect corruptions as early as possible

            final long earliestKeyCreationTime = WalletHelper.INSTANCE.getKeyCreationTime();

            Log.e(TAG, "CREATION_TIME=" + earliestKeyCreationTime + " BLOCKCHAIN_FILE=" + blockChainFileExists);
            if (!blockChainFileExists && earliestKeyCreationTime > 0) {
                try {
                    Configuration.getInstance().setDeletingBlockchain(true);
                    final long start = System.currentTimeMillis();
                    final InputStream checkpointsInputStream = getAssets()
                            .open("bitcoin/" + Constants.WALLET.CHECKPOINTS_FILENAME);
                    CheckpointManager.checkpoint(NETWORK_PARAMETERS, checkpointsInputStream, blockStore,
                            earliestKeyCreationTime);
                    Log.e(TAG, String.format("checkpoints loaded from '%1$s', took %2$dms",
                            Constants.WALLET.CHECKPOINTS_FILENAME, System.currentTimeMillis() - start));
                } catch (final IOException x) {
                    Log.e(TAG, "problem reading checkpoints, continuing without", x);
                }
            }
        } catch (final BlockStoreException x) {
            blockChainFile.delete();

            final String msg = "blockstore cannot be created";
            Log.e(TAG, msg, x);
        }

        try {
            blockChain = new BlockChain(NETWORK_PARAMETERS, WalletHelper.INSTANCE.getWallet(), blockStore);
        } catch (final BlockStoreException x) {
            throw new Error("blockchain cannot be created", x);
        }

        final IntentFilter intentFilter = new IntentFilter();
        intentFilter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
        intentFilter.addAction(Intent.ACTION_DEVICE_STORAGE_LOW);
        intentFilter.addAction(Intent.ACTION_DEVICE_STORAGE_OK);
        registerReceiver(connectivityReceiver, intentFilter); // implicitly start PeerGroup

        registerReceiver(tickReceiver, new IntentFilter(Intent.ACTION_TIME_TICK));
    } else {
        Log.e(TAG, "Incomplete conditions for start service");
        stopSelf();
    }
}

---

From source file:com.blu3f1re.reddwallet.service.BlockchainServiceImpl.java

@Override
public void onCreate() {
    serviceCreatedAt = System.currentTimeMillis();
    log.debug(".onCreate()");

    super.onCreate();

    nm = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

    final String lockName = getPackageName() + " blockchain sync";

    final PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
    wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, lockName);

    application = (WalletApplication) getApplication();
    config = application.getConfiguration();
    final Wallet wallet = application.getWallet();

    bestChainHeightEver = config.getBestChainHeightEver();

    peerConnectivityListener = new PeerConnectivityListener();

    sendBroadcastPeerState(0);//from  ww w.  j av  a  2 s . c o  m

    final IntentFilter intentFilter = new IntentFilter();
    intentFilter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
    intentFilter.addAction(Intent.ACTION_DEVICE_STORAGE_LOW);
    intentFilter.addAction(Intent.ACTION_DEVICE_STORAGE_OK);
    registerReceiver(connectivityReceiver, intentFilter);

    blockChainFile = new File(getDir("blockstore", Context.MODE_PRIVATE), Constants.BLOCKCHAIN_FILENAME);
    final boolean blockChainFileExists = blockChainFile.exists();

    if (!blockChainFileExists) {
        log.info("blockchain does not exist, resetting wallet");

        wallet.clearTransactions(0);
        wallet.setLastBlockSeenHeight(-1); // magic value
        wallet.setLastBlockSeenHash(null);
    }

    try {
        blockStore = new SPVBlockStore(Constants.NETWORK_PARAMETERS, blockChainFile);
        blockStore.getChainHead(); // detect corruptions as early as possible

        final long earliestKeyCreationTime = wallet.getEarliestKeyCreationTime();

        if (!blockChainFileExists && earliestKeyCreationTime > 0) {
            try {
                final InputStream checkpointsInputStream = getAssets().open(Constants.CHECKPOINTS_FILENAME);
                CheckpointManager.checkpoint(Constants.NETWORK_PARAMETERS, checkpointsInputStream, blockStore,
                        earliestKeyCreationTime);
            } catch (final IOException x) {
                log.error("problem reading checkpoints, continuing without", x);
            }
        }
    } catch (final BlockStoreException x) {
        blockChainFile.delete();

        final String msg = "blockstore cannot be created";
        log.error(msg, x);
        throw new Error(msg, x);
    }

    log.info("using " + blockStore.getClass().getName());

    try {
        blockChain = new BlockChain(Constants.NETWORK_PARAMETERS, wallet, blockStore);
    } catch (final BlockStoreException x) {
        throw new Error("blockchain cannot be created", x);
    }

    application.getWallet().addEventListener(walletEventListener, Threading.SAME_THREAD);

    registerReceiver(tickReceiver, new IntentFilter(Intent.ACTION_TIME_TICK));

    maybeRotateKeys();
}

---

From source file:com.kncwallet.wallet.service.BlockchainServiceImpl.java

@Override
public void onCreate() {
    serviceCreatedAt = System.currentTimeMillis();
    log.debug(".onCreate()");

    super.onCreate();

    nm = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

    final String lockName = getPackageName() + " blockchain sync";

    final PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
    wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, lockName);

    application = (WalletApplication) getApplication();
    prefs = PreferenceManager.getDefaultSharedPreferences(this);
    final Wallet wallet = application.getWallet();

    bestChainHeightEver = prefs.getInt(Constants.PREFS_KEY_BEST_CHAIN_HEIGHT_EVER, 0);

    peerConnectivityListener = new PeerConnectivityListener();

    sendBroadcastPeerState(0);//from w  ww. j  a va2 s .c  om

    final IntentFilter intentFilter = new IntentFilter();
    intentFilter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
    intentFilter.addAction(Intent.ACTION_DEVICE_STORAGE_LOW);
    intentFilter.addAction(Intent.ACTION_DEVICE_STORAGE_OK);
    registerReceiver(connectivityReceiver, intentFilter);

    blockChainFile = new File(getDir("blockstore", Context.MODE_PRIVATE), Constants.BLOCKCHAIN_FILENAME);
    final boolean blockChainFileExists = blockChainFile.exists();

    if (!blockChainFileExists) {
        log.info("blockchain does not exist, resetting wallet");

        wallet.clearTransactions(0);
        wallet.setLastBlockSeenHeight(-1); // magic value
        wallet.setLastBlockSeenHash(null);
    }

    try {
        blockStore = new SPVBlockStore(Constants.NETWORK_PARAMETERS, blockChainFile);
        blockStore.getChainHead(); // detect corruptions as early as possible

        final long earliestKeyCreationTime = wallet.getEarliestKeyCreationTime();

        if (!blockChainFileExists && earliestKeyCreationTime > 0) {
            try {
                final InputStream checkpointsInputStream = getAssets().open(Constants.CHECKPOINTS_FILENAME);
                CheckpointManager.checkpoint(Constants.NETWORK_PARAMETERS, checkpointsInputStream, blockStore,
                        earliestKeyCreationTime);
            } catch (final IOException x) {
                log.error("problem reading checkpoints, continuing without", x);
            }
        }
    } catch (final BlockStoreException x) {
        blockChainFile.delete();

        final String msg = "blockstore cannot be created";
        log.error(msg, x);
        throw new Error(msg, x);
    }

    log.info("using " + blockStore.getClass().getName());

    try {
        blockChain = new BlockChain(Constants.NETWORK_PARAMETERS, wallet, blockStore);
    } catch (final BlockStoreException x) {
        throw new Error("blockchain cannot be created", x);
    }

    application.getWallet().addEventListener(walletEventListener);

    registerReceiver(tickReceiver, new IntentFilter(Intent.ACTION_TIME_TICK));

    maybeRotateKeys();
}

---

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