prepend remaining time with a Minus sign at negative time

app/build.gradle

@@ -41,7 +41,7 @@ android {
 }
 
 dependencies {
-    implementation 'com.simplemobiletools:commons:3.15.10'
+    implementation 'com.simplemobiletools:commons:3.15.11'
     implementation 'com.facebook.stetho:stetho:1.5.0'
     implementation 'com.android.support.constraint:constraint-layout:1.0.2'
     implementation 'com.shawnlin:number-picker:2.4.6'

app/src/main/kotlin/com/simplemobiletools/clock/fragments/TimerFragment.kt

@@ -147,7 +147,16 @@ class TimerFragment : Fragment() {
     }
 
     private fun updateDisplayedText() {
-        view.timer_time.text = (initialSecs - totalTicks).getFormattedDuration()
+        val diff = initialSecs - totalTicks
+        var formattedDuration = Math.abs(diff).getFormattedDuration()
+        if (diff < 0) {
+            formattedDuration = "-$formattedDuration"
+        }
+
+        view.timer_time.text = formattedDuration
+        if (diff == 0) {
+
+        }
     }
 
     private val updateRunnable = object : Runnable {