Add SleepMonitor to detect deep sleep.

app/src/main/java/org/briarproject/snooze/SettingsFragment.java

 package org.briarproject.snooze;
 
+import android.app.Activity;
 import android.content.Intent;
 import android.os.Bundle;
 import android.support.v4.app.Fragment;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.View.OnClickListener;
+import android.view.View.OnFocusChangeListener;
 import android.view.ViewGroup;
+import android.view.inputmethod.InputMethodManager;
 import android.widget.AdapterView;
 import android.widget.AdapterView.OnItemSelectedListener;
 import android.widget.ArrayAdapter;
@@ -23,11 +26,11 @@ import static org.briarproject.snooze.Constants.ACTION_START;
 import static org.briarproject.snooze.Constants.ACTION_STOP;
 import static org.briarproject.snooze.Constants.EXTRA_ALARM_INTERVAL_MS;
 import static org.briarproject.snooze.Constants.EXTRA_ALARM_TYPE;
-import static org.briarproject.snooze.Constants.EXTRA_IP_ADDRESS;
-import static org.briarproject.snooze.Constants.EXTRA_PORT_NUMBER;
 import static org.briarproject.snooze.Constants.EXTRA_FOREGROUND_SERVICE;
+import static org.briarproject.snooze.Constants.EXTRA_IP_ADDRESS;
 import static org.briarproject.snooze.Constants.EXTRA_KEEPALIVE_BYTES;
 import static org.briarproject.snooze.Constants.EXTRA_KEEPALIVE_INTERVAL_MS;
+import static org.briarproject.snooze.Constants.EXTRA_PORT_NUMBER;
 import static org.briarproject.snooze.Constants.EXTRA_WAKE_LOCK;
 import static org.briarproject.snooze.Constants.EXTRA_WIFI_LOCK;
 import static org.briarproject.snooze.alarm.AlarmType.TIMER;
@@ -120,13 +123,30 @@ public class SettingsFragment extends Fragment {
 				onClickStopServiceButton();
 			}
 		});
+		layout.findViewById(R.id.ipEntry).setOnFocusChangeListener(new OnFocusChangeListener() {
+			@Override
+			public void onFocusChange(View v, boolean hasFocus) {
+				if (!hasFocus) {
+					hideKeyboard(v);
+				}
+			}
+		});
+		layout.findViewById(R.id.portEntry).setOnFocusChangeListener(new OnFocusChangeListener() {
+			@Override
+			public void onFocusChange(View v, boolean hasFocus) {
+				if (!hasFocus) {
+					hideKeyboard(v);
+				}
+			}
+		});
 		return layout;
 	}
 
 	private void onClickApplySettingsButton() {
 		View layout = getView();
 		String ipAddress = ((EditText) layout.findViewById(R.id.ipEntry)).getText().toString();
-		int portNumber = Integer.parseInt(((EditText) layout.findViewById(R.id.portEntry)).getText().toString());
+		String portString = ((EditText) layout.findViewById(R.id.portEntry)).getText().toString();
+		int portNumber = Integer.parseInt(portString);
 		boolean foreground =
 				((Switch) layout.findViewById(R.id.foregroundServiceSwitch)).isChecked();
 		boolean wakeLock = ((Switch) layout.findViewById(R.id.wakeLockSwitch)).isChecked();
@@ -156,4 +176,10 @@ public class SettingsFragment extends Fragment {
 		i.setAction(ACTION_STOP);
 		getContext().startService(i);
 	}
+
+	public void hideKeyboard(View view) {
+		InputMethodManager inputMethodManager = (InputMethodManager)
+				getContext().getSystemService(Activity.INPUT_METHOD_SERVICE);
+		inputMethodManager.hideSoftInputFromWindow(view.getWindowToken(), 0);
+	}
 }

app/src/main/java/org/briarproject/snooze/SleepMonitor.java

+package org.briarproject.snooze;
+
+import android.os.SystemClock;
+
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+
+import static java.util.Locale.US;
+import static java.util.concurrent.TimeUnit.MILLISECONDS;
+
+class SleepMonitor implements Runnable {
+
+	/**
+	 * How often to check the uptime and real time.
+	 */
+	private static final int INTERVAL_MS = 5000;
+
+	/**
+	 * If the difference between uptime and real time changes by more than this amount, assume deep
+	 * sleep has occurred.
+	 */
+	private static final int MIN_SLEEP_DURATION_MS = 1000;
+
+	private final Logger log;
+	private final ScheduledExecutorService executorService;
+
+	private volatile long uptime, realtime, diff;
+
+	SleepMonitor(Logger log) {
+		this.log = log;
+		uptime = SystemClock.uptimeMillis();
+		realtime = SystemClock.elapsedRealtime();
+		diff = realtime - uptime;
+		executorService = Executors.newSingleThreadScheduledExecutor();
+	}
+
+	void start() {
+		executorService.scheduleAtFixedRate(this, 0, INTERVAL_MS, MILLISECONDS);
+	}
+
+	@Override
+	public void run() {
+		long sleepDuration = getSleepDuration();
+		if (sleepDuration > MIN_SLEEP_DURATION_MS) {
+			String start = getTime(System.currentTimeMillis() - sleepDuration);
+			log.log("System slept for " + sleepDuration + " ms (since " + start + ")");
+		}
+	}
+
+	/**
+	 * Returns the amount of time spent in deep sleep since the last check.
+	 */
+	private long getSleepDuration() {
+		uptime = SystemClock.uptimeMillis();
+		realtime = SystemClock.elapsedRealtime();
+		long lastDiff = diff;
+		diff = realtime - uptime;
+		return diff - lastDiff;
+	}
+
+	private String getTime(long time) {
+		DateFormat sdf = new SimpleDateFormat("HH:mm:ss", US);
+		return sdf.format(new Date(time));
+	}
+}

app/src/main/java/org/briarproject/snooze/SnoozeApplication.java

@@ -11,6 +11,7 @@ public class SnoozeApplication extends Application {
 		super.onCreate();
 		log = new Logger(this, getString(R.string.app_name));
 		log.log("Application created");
+		new SleepMonitor(log).start();
 	}
 
 	Logger getLogger() {

app/src/main/java/org/briarproject/snooze/SnoozeService.java

@@ -25,11 +25,11 @@ import static org.briarproject.snooze.Constants.ACTION_START;
 import static org.briarproject.snooze.Constants.ACTION_STOP;
 import static org.briarproject.snooze.Constants.EXTRA_ALARM_INTERVAL_MS;
 import static org.briarproject.snooze.Constants.EXTRA_ALARM_TYPE;
-import static org.briarproject.snooze.Constants.EXTRA_IP_ADDRESS;
-import static org.briarproject.snooze.Constants.EXTRA_PORT_NUMBER;
 import static org.briarproject.snooze.Constants.EXTRA_FOREGROUND_SERVICE;
+import static org.briarproject.snooze.Constants.EXTRA_IP_ADDRESS;
 import static org.briarproject.snooze.Constants.EXTRA_KEEPALIVE_BYTES;
 import static org.briarproject.snooze.Constants.EXTRA_KEEPALIVE_INTERVAL_MS;
+import static org.briarproject.snooze.Constants.EXTRA_PORT_NUMBER;
 import static org.briarproject.snooze.Constants.EXTRA_WAKE_LOCK;
 import static org.briarproject.snooze.Constants.EXTRA_WIFI_LOCK;
 import static org.briarproject.snooze.alarm.AlarmType.STOP;
@@ -46,9 +46,8 @@ public class SnoozeService extends Service {
 	private WifiManager.WifiLock wifiLock = null;
 	private NetworkClient networkClient = null;
 	private Alarm alarm = null;
-	private int alarmIntervalMs, keepaliveIntervalMs, keepaliveBytes;
-	private String host;
-	private int port;
+	private int alarmIntervalMs, keepaliveIntervalMs, keepaliveBytes, port;
+	private String host = null;
 
 	private volatile Logger log = null;