Improve timer for Session

app/src/main/java/net/pokeranalytics/android/ui/fragment/SessionFragment.kt

@@ -27,6 +27,7 @@ import net.pokeranalytics.android.ui.view.RowRepresentable
 import net.pokeranalytics.android.ui.view.RowRepresentableDiffCallback
 import net.pokeranalytics.android.ui.view.SmoothScrollLinearLayoutManager
 import net.pokeranalytics.android.ui.view.rowrepresentable.SessionRow
+import net.pokeranalytics.android.util.extensions.getNextMinuteInMilliseconds
 import java.util.*
 
 
@@ -47,7 +48,6 @@ class SessionFragment : RealmFragment(), RowRepresentableDelegate {
 
 	private val refreshTimer: Runnable = object : Runnable {
 		override fun run() {
-			// Refresh header each 30 seconds
 			refreshTimer()
 			handler.postDelayed(this, TIMER_DELAY)
 		}
@@ -194,7 +194,7 @@ class SessionFragment : RealmFragment(), RowRepresentableDelegate {
 				floatingActionButton.animate().scaleX(1f).scaleY(1f).alpha(1f)
 					.setDuration(animationDuration)
 					.setInterpolator(OvershootInterpolator()).start()
-				handler.postDelayed(refreshTimer, TIMER_DELAY)
+				handler.postDelayed(refreshTimer, Date().getNextMinuteInMilliseconds())
 			}
 			SessionState.STARTED -> {
 				sessionMenu?.findItem(R.id.restart)?.isVisible = true
@@ -203,7 +203,7 @@ class SessionFragment : RealmFragment(), RowRepresentableDelegate {
 				floatingActionButton.animate().scaleX(1f).scaleY(1f).alpha(1f)
 					.setDuration(animationDuration)
 					.setInterpolator(OvershootInterpolator()).start()
-				handler.postDelayed(refreshTimer, TIMER_DELAY)
+				handler.postDelayed(refreshTimer, Date().getNextMinuteInMilliseconds())
 			}
 			SessionState.PAUSED -> {
 				sessionMenu?.findItem(R.id.restart)?.isVisible = true

app/src/main/java/net/pokeranalytics/android/util/extensions/DateExtension.kt

@@ -141,3 +141,17 @@ fun Date.startOfYear() : Date {
     calendar.set(Calendar.MONTH, 0)
     return calendar.time
 }
+
+// Return the number of seconds until the next minute
+fun Date.getNextMinuteInseconds() : Int {
+    return (getNextMinuteInMilliseconds() / 1000).toInt()
+}
+
+// Return the number of milliseconds until the next minute
+fun Date.getNextMinuteInMilliseconds() : Long {
+    val calendar = Calendar.getInstance()
+    calendar.add(Calendar.MINUTE, 1)
+    calendar.set(Calendar.SECOND, 0)
+    calendar.set(Calendar.MILLISECOND, 0)
+    return calendar.time.time - this.time
+}