Changed the approach, using an extension method

uhabits-android/src/main/java/org/isoron/uhabits/HabitsApplication.kt

@@ -20,7 +20,6 @@
 package org.isoron.uhabits
 
 import android.app.Application
-import android.app.Dialog
 import android.content.Context
 import org.isoron.uhabits.core.database.UnsupportedDatabaseVersionException
 import org.isoron.uhabits.core.reminders.ReminderScheduler
@@ -119,11 +118,5 @@ class HabitsApplication : Application() {
                 false
             }
         }
-
-        var currentDialog: Dialog? = null
-        fun clearCurrentDialog() {
-            currentDialog?.dismiss()
-            currentDialog = null
-        }
     }
 }

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

@@ -25,8 +25,8 @@ import android.view.LayoutInflater
 import android.view.View
 import android.view.View.GONE
 import android.view.View.VISIBLE
-import org.isoron.uhabits.HabitsApplication
 import org.isoron.uhabits.R
+import org.isoron.uhabits.activities.common.dialogs.MultipleDialogsHandler.Companion.dismissCurrentAndShow
 import org.isoron.uhabits.core.models.Entry.Companion.NO
 import org.isoron.uhabits.core.models.Entry.Companion.SKIP
 import org.isoron.uhabits.core.models.Entry.Companion.UNKNOWN
@@ -99,7 +99,6 @@ class CheckmarkPopup(
     }
 
     fun show() {
-        HabitsApplication.clearCurrentDialog()
         dialog = Dialog(context, android.R.style.Theme_NoTitleBar)
         dialog.setContentView(view.root)
         dialog.window?.apply {
@@ -119,13 +118,12 @@ class CheckmarkPopup(
         view.unknownBtn.setOnClickListener { onClick(UNKNOWN) }
         dialog.setCanceledOnTouchOutside(true)
         dialog.dimBehind()
-        HabitsApplication.currentDialog = dialog
+        dialog.dismissCurrentAndShow()
         dialog.show()
     }
 
     fun save() {
         onToggle(value, view.notes.text.toString().trim())
-        HabitsApplication.currentDialog = null
         dialog.dismiss()
     }
 }

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

@@ -19,10 +19,9 @@
 package org.isoron.uhabits.activities.common.dialogs
 
 import android.app.Dialog
-import android.content.DialogInterface
 import android.os.Bundle
 import com.android.colorpicker.ColorPickerDialog
-import org.isoron.uhabits.HabitsApplication
+import org.isoron.uhabits.activities.common.dialogs.MultipleDialogsHandler.Companion.dismissCurrentAndShow
 import org.isoron.uhabits.core.ui.callbacks.OnColorPickedCallback
 import org.isoron.uhabits.utils.toPaletteColor
 
@@ -38,16 +37,7 @@ class ColorPickerDialog : ColorPickerDialog() {
     }
 
     override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
-        HabitsApplication.clearCurrentDialog()
+        this.dialog?.dismissCurrentAndShow()
-        HabitsApplication.currentDialog = this.dialog
         return super.onCreateDialog(savedInstanceState)
     }
-    override fun onColorSelected(color: Int) {
-        super.onColorSelected(color)
-    }
-
-    override fun onDismiss(dialog: DialogInterface) {
-        HabitsApplication.currentDialog = null
-        super.onDismiss(dialog)
-    }
 }

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

@@ -21,8 +21,8 @@ package org.isoron.uhabits.activities.common.dialogs
 import android.content.Context
 import android.content.DialogInterface
 import androidx.appcompat.app.AlertDialog
-import org.isoron.uhabits.HabitsApplication
 import org.isoron.uhabits.R
+import org.isoron.uhabits.activities.common.dialogs.MultipleDialogsHandler.Companion.dismissCurrentAndShow
 import org.isoron.uhabits.core.ui.callbacks.OnConfirmedCallback
 import org.isoron.uhabits.inject.ActivityContext
 
@@ -35,7 +35,6 @@ class ConfirmDeleteDialog(
     quantity: Int
 ) : AlertDialog(context) {
     init {
-        HabitsApplication.clearCurrentDialog()
         val res = context.resources
         setTitle(res.getQuantityString(R.plurals.delete_habits_title, quantity))
         setMessage(res.getQuantityString(R.plurals.delete_habits_message, quantity))
@@ -48,10 +47,6 @@ class ConfirmDeleteDialog(
             res.getString(R.string.no)
         ) { dialog: DialogInterface?, which: Int -> }
 
-        HabitsApplication.currentDialog = this
+        this.dismissCurrentAndShow()
-
-        this.setOnDismissListener {
-            HabitsApplication.currentDialog = null
-        }
     }
 }

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

@@ -20,7 +20,6 @@
 package org.isoron.uhabits.activities.common.dialogs
 
 import android.app.Dialog
-import android.content.DialogInterface
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
@@ -31,8 +30,8 @@ import android.widget.TextView
 import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatDialogFragment
 import kotlinx.android.synthetic.main.frequency_picker_dialog.view.*
-import org.isoron.uhabits.HabitsApplication
 import org.isoron.uhabits.R
+import org.isoron.uhabits.activities.common.dialogs.MultipleDialogsHandler.Companion.dismissCurrentAndShow
 
 class FrequencyPickerDialog(
     var freqNumerator: Int,
@@ -45,7 +44,6 @@ class FrequencyPickerDialog(
     constructor() : this(1, 1)
 
     override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
-        HabitsApplication.clearCurrentDialog()
         val inflater = LayoutInflater.from(requireActivity())
         contentView = inflater.inflate(R.layout.frequency_picker_dialog, null)
 
@@ -118,15 +116,10 @@ class FrequencyPickerDialog(
             .setView(contentView)
             .setPositiveButton(R.string.save) { _, _ -> onSaveClicked() }
             .create()
-        HabitsApplication.currentDialog = dialog
+        dialog.dismissCurrentAndShow()
         return dialog
     }
 
-    override fun onDismiss(dialog: DialogInterface) {
-        super.onDismiss(dialog)
-        HabitsApplication.currentDialog = null
-    }
-
     private fun addBeforeAfterText(
         str: String,
         container: LinearLayout

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

@@ -0,0 +1,19 @@
+package org.isoron.uhabits.activities.common.dialogs
+
+import android.app.Dialog
+import java.lang.ref.WeakReference
+
+class MultipleDialogsHandler {
+    companion object {
+        var currentDialog: WeakReference<Dialog> = WeakReference(null)
+
+        fun Dialog.dismissCurrentAndShow() {
+            if (currentDialog.get() != null) {
+                var test = currentDialog.get()!!.isShowing
+            }
+            currentDialog.get()?.dismiss()
+            currentDialog = WeakReference(this)
+            show()
+        }
+    }
+}

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

@@ -27,7 +27,7 @@ import android.view.MotionEvent.ACTION_DOWN
 import android.view.View
 import android.view.View.GONE
 import android.view.View.VISIBLE
-import org.isoron.uhabits.HabitsApplication
+import org.isoron.uhabits.activities.common.dialogs.MultipleDialogsHandler.Companion.dismissCurrentAndShow
 import org.isoron.uhabits.core.models.Entry
 import org.isoron.uhabits.core.preferences.Preferences
 import org.isoron.uhabits.databinding.CheckmarkPopupBinding
@@ -74,7 +74,6 @@ class NumberPopup(
     }
 
     fun show() {
-        HabitsApplication.clearCurrentDialog()
         dialog = Dialog(context, android.R.style.Theme_NoTitleBar)
         dialog.setContentView(view.root)
         dialog.window?.apply {
@@ -86,7 +85,6 @@ class NumberPopup(
         }
         dialog.setOnDismissListener {
             onDismiss()
-            HabitsApplication.currentDialog = null
         }
 
         view.value.setOnKeyListener { _, keyCode, event ->
@@ -106,7 +104,7 @@ class NumberPopup(
         view.value.requestFocusWithKeyboard()
         dialog.setCanceledOnTouchOutside(true)
         dialog.dimBehind()
-        HabitsApplication.currentDialog = dialog
+        dialog.dismissCurrentAndShow()
         dialog.show()
     }
 

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

@@ -24,8 +24,8 @@ import android.content.DialogInterface.OnMultiChoiceClickListener
 import android.os.Bundle
 import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatDialogFragment
-import org.isoron.uhabits.HabitsApplication
 import org.isoron.uhabits.R
+import org.isoron.uhabits.activities.common.dialogs.MultipleDialogsHandler.Companion.dismissCurrentAndShow
 import org.isoron.uhabits.core.models.WeekdayList
 import org.isoron.uhabits.core.utils.DateUtils
 import java.util.Calendar
@@ -60,7 +60,6 @@ class WeekdayPickerDialog :
     }
 
     override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
-        HabitsApplication.clearCurrentDialog()
         val builder = AlertDialog.Builder(
             requireActivity()
         )
@@ -77,15 +76,10 @@ class WeekdayPickerDialog :
             ) { _: DialogInterface?, _: Int -> dismiss() }
 
         val dialog = builder.create()
-        HabitsApplication.currentDialog = dialog
+        dialog.dismissCurrentAndShow()
         return dialog
     }
 
-    override fun onDismiss(dialog: DialogInterface) {
-        super.onDismiss(dialog)
-        HabitsApplication.currentDialog = null
-    }
-
     fun setListener(listener: OnWeekdaysPickedListener?) {
         this.listener = listener
     }