MainActivity: allow amount for poo and pee events

An unspecified amount has also been added
to have the same semantics as before.

During these actions, the strings for title
and description of dialogs have been cleaned up.

app/src/main/java/utils/NumericUtils.kt

@@ -4,6 +4,7 @@ import android.content.Context
 import android.icu.util.LocaleData
 import android.icu.util.ULocale
 import android.os.Build
+import android.util.Log
 import it.danieleverducci.lunatracker.R
 import it.danieleverducci.lunatracker.entities.LunaEvent
 import java.text.NumberFormat
@@ -66,8 +67,15 @@ class NumericUtils (val context: Context) {
             formatted.append(when (event.type) {
                 LunaEvent.TYPE_TEMPERATURE ->
                     (event.quantity / 10.0f).toString()
-                LunaEvent.TYPE_PUKE ->
-                    context.resources.getStringArray(R.array.AmountLabels)[event.quantity - 1]
+                LunaEvent.TYPE_DIAPERCHANGE_POO,
+                LunaEvent.TYPE_DIAPERCHANGE_PEE,
+                LunaEvent.TYPE_PUKE -> {
+                    val array = context.resources.getStringArray(R.array.AmountLabels)
+                    return array.getOrElse(event.quantity) {
+                        Log.e("NumericUtils", "Invalid index ${event.quantity}")
+                        return ""
+                    }
+                }
                 else ->
                     event.quantity
             })