Add preference to show debug information on main screen.

app/src/main/java/net/voussoir/trkpt/Keys.kt

@@ -61,6 +61,7 @@ object Keys {
     const val PREF_LOCATION_GPS: String = "prefLocationGPS"
     const val PREF_OMIT_RESTS: String = "prefOmitRests"
     const val PREF_ALLOW_SLEEP: String = "prefAllowSleep"
+    const val PREF_SHOW_DEBUG: String = "prefShowDebug"
     const val PREF_DEVICE_ID: String = "prefDeviceID"
     const val PREF_DATABASE_DIRECTORY: String = "prefDatabaseDirectory"
 
@@ -106,6 +107,7 @@ object Keys {
     const val DEFAULT_ZOOM_LEVEL: Double = 16.0
     const val DEFAULT_OMIT_RESTS: Boolean = true
     const val DEFAULT_ALLOW_SLEEP: Boolean = true
+    const val DEFAULT_SHOW_DEBUG: Boolean = false
 
     // notification
     const val TRACKER_SERVICE_NOTIFICATION_ID: Int = 1

app/src/main/java/net/voussoir/trkpt/MapFragment.kt

@@ -63,6 +63,7 @@ class MapFragment : Fragment()
     var continuous_auto_center: Boolean = true
     private var trackerService: TrackerService? = null
     private lateinit var database_changed_listener: DatabaseChangedListener
+    var show_debug: Boolean = false
 
     var thismapfragment: MapFragment? = null
     lateinit var rootView: View
@@ -226,6 +227,8 @@ class MapFragment : Fragment()
             mapView.controller.setZoom(mapView.zoomLevelDouble - 0.5)
         }
 
+        show_debug = PreferencesHelper.loadShowDebug()
+
         requireActivity().window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
         handler.post(redraw_runnable)
         return rootView
@@ -360,6 +363,10 @@ class MapFragment : Fragment()
     }
 
     private val sharedPreferenceChangeListener = SharedPreferences.OnSharedPreferenceChangeListener { sharedPreferences, key ->
+        if (key == Keys.PREF_SHOW_DEBUG)
+        {
+            show_debug = sharedPreferences.getBoolean(Keys.PREF_SHOW_DEBUG, Keys.DEFAULT_SHOW_DEBUG)
+        }
         redraw()
     }
 
@@ -632,7 +639,6 @@ class MapFragment : Fragment()
             redraw()
             // register listener for changes in shared preferences
             PreferencesHelper.registerPreferenceChangeListener(sharedPreferenceChangeListener)
-            // start listening for location updates
         }
         override fun onServiceDisconnected(arg0: ComponentName)
         {
@@ -662,7 +668,22 @@ class MapFragment : Fragment()
             centerMap(tracker.currentBestLocation)
         }
 
-        map_current_time.text = iso8601_local_noms(tracker.currentBestLocation.time)
+        if (show_debug)
+        {
+            map_current_time.text = """
+            now: ${iso8601_local_noms(System.currentTimeMillis())}
+            location: ${iso8601_local_noms(tracker.currentBestLocation.time)}
+            listeners: ${iso8601_local_noms(tracker.listeners_enabled_at)}
+            motion: ${iso8601_local_noms(tracker.last_significant_motion)}
+            watchdog: ${iso8601_local_noms(tracker.last_watchdog)}
+            died: ${iso8601_local_noms(tracker.gave_up_at)}
+            power: ${tracker.device_is_charging}
+            """.trimIndent()
+        }
+        else
+        {
+            map_current_time.text = iso8601_local_noms(tracker.currentBestLocation.time)
+        }
 
         mapView.invalidate()
     }

app/src/main/java/net/voussoir/trkpt/SettingsFragment.kt

@@ -139,6 +139,17 @@ class SettingsFragment : PreferenceFragmentCompat()
         preferenceCategoryGeneral.contains(prefAllowSleep)
         screen.addPreference(prefAllowSleep)
 
+        val prefShowDebug = SwitchPreferenceCompat(activity as Context)
+        prefShowDebug.isSingleLineTitle = false
+        prefShowDebug.title = "Show debug info"
+        prefShowDebug.setIcon(R.drawable.ic_bar_chart_24)
+        prefShowDebug.key = Keys.PREF_SHOW_DEBUG
+        prefShowDebug.summaryOn = "Debug info shown on map screen."
+        prefShowDebug.summaryOff = "Debug info hidden."
+        prefShowDebug.setDefaultValue(Keys.DEFAULT_SHOW_DEBUG)
+        preferenceCategoryGeneral.contains(prefShowDebug)
+        screen.addPreference(prefShowDebug)
+
         val preferenceDeviceID = EditTextPreference(activity as Context)
         preferenceDeviceID.title = getString(R.string.pref_device_id)
         preferenceDeviceID.setIcon(R.drawable.ic_smartphone_24dp)

app/src/main/java/net/voussoir/trkpt/TrackerService.kt

@@ -21,15 +21,8 @@
 package net.voussoir.trkpt
 
 import android.Manifest
-import android.app.Notification
+import android.app.*
-import android.app.NotificationChannel
+import android.content.*
-import android.app.NotificationManager
-import android.app.PendingIntent
-import android.app.Service
-import android.app.TaskStackBuilder
-import android.content.Context
-import android.content.Intent
-import android.content.SharedPreferences
 import android.content.pm.PackageManager
 import android.hardware.*
 import android.location.Location
@@ -61,6 +54,8 @@ class TrackerService: Service()
     var lastCommit: Long = 0
     var listeners_enabled_at: Long = 0
     var last_significant_motion: Long = 0
+    var last_watchdog: Long = 0
+    var gave_up_at: Long = 0
     var arrived_at_home: Long = 0
     var location_interval: Long = 0
     val TIME_UNTIL_SLEEP: Long = 2 * Keys.ONE_MINUTE_IN_MILLISECONDS
@@ -718,6 +713,7 @@ class TrackerService: Service()
             Log.i("VOUSSOIR", "TrackerService.background_watchdog")
             handler.postDelayed(this, WATCHDOG_INTERVAL)
             val now = System.currentTimeMillis()
+            last_watchdog = now
             if (
                 allow_sleep &&
                 has_motion_sensor &&
@@ -730,6 +726,7 @@ class TrackerService: Service()
             )
             {
                 reset_location_listeners(Keys.LOCATION_INTERVAL_GIVE_UP)
+                gave_up_at = now
             }
         }
     }

app/src/main/java/net/voussoir/trkpt/functions.kt

@@ -22,6 +22,10 @@ fun iso8601_local(timestamp: Long): String
 
 fun iso8601_local_noms(timestamp: Long): String
 {
+    if (timestamp == 0L)
+    {
+        return "0"
+    }
     val iso8601_format = SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss")
     return iso8601_format.format(timestamp)
 }

app/src/main/java/net/voussoir/trkpt/helpers/PreferencesHelper.kt

@@ -105,6 +105,10 @@ object PreferencesHelper
         return sharedPreferences.getBoolean(Keys.PREF_ALLOW_SLEEP, Keys.DEFAULT_ALLOW_SLEEP)
     }
 
+    fun loadShowDebug(): Boolean {
+        return sharedPreferences.getBoolean(Keys.PREF_SHOW_DEBUG, Keys.DEFAULT_SHOW_DEBUG)
+    }
+
     /* Loads the state of a map */
     fun loadCurrentBestLocation(): Location {
         val provider: String = sharedPreferences.getString(Keys.PREF_CURRENT_BEST_LOCATION_PROVIDER, LocationManager.NETWORK_PROVIDER) ?: LocationManager.NETWORK_PROVIDER

app/src/main/res/layout/fragment_map.xml

@@ -92,11 +92,11 @@
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_marginTop="16dp"
+            android:gravity="right"
             app:fontFamily="monospace"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintTop_toTopOf="parent" />
-            />
 
         <!-- GROUPS -->