Issue 1332: Multiple numeric dialogs appearing (#1356)

Co-authored-by: Jakub Kalinowski <kalj@netcompany.com>

uhabits-android/src/main/java/org/isoron/uhabits/activities/common/dialogs/NumberPickerFactory.kt

@@ -50,7 +50,6 @@ class NumberPickerFactory
 @Inject constructor(
     @ActivityContext private val context: Context
 ) {
-
     @SuppressLint("SetTextI18n")
     fun create(
         value: Double,
@@ -60,6 +59,8 @@ class NumberPickerFactory
         frequency: Frequency,
         callback: ListHabitsBehavior.NumberPickerCallback
     ): AlertDialog {
+        clearCurrentDialog()
+
         val inflater = LayoutInflater.from(context)
         val view = inflater.inflate(R.layout.number_picker_dialog, null)
 
@@ -113,6 +114,7 @@ class NumberPickerFactory
             }
             .setOnDismissListener {
                 callback.onNumberPickerDismissed()
+                currentDialog = null
             }
 
         if (frequency == DAILY) {
@@ -153,6 +155,7 @@ class NumberPickerFactory
             false
         }
 
+        currentDialog = dialog
         return dialog
     }
 
@@ -169,6 +172,14 @@ class NumberPickerFactory
         val inputMethodManager = context.getSystemService(InputMethodManager::class.java)
         inputMethodManager?.showSoftInput(v, 0)
     }
+
+    companion object {
+        private var currentDialog: AlertDialog? = null
+        fun clearCurrentDialog() {
+            currentDialog?.dismiss()
+            currentDialog = null
+        }
+    }
 }
 
 class SeparatorWatcherInputFilter(private val nextPicker: NumberPicker) : InputFilter {