Extrahiere DatePicker-Logik in eigene Klasse

app/src/main/java/com/cyb3rko/techniklogger/fragments/MissionPusherFragment.kt

@@ -1,6 +1,5 @@
 package com.cyb3rko.techniklogger.fragments
 
-import android.annotation.SuppressLint
 import android.content.Context
 import android.os.Bundle
 import android.text.Html
@@ -12,17 +11,14 @@ import androidx.fragment.app.Fragment
 import androidx.navigation.fragment.findNavController
 import androidx.navigation.fragment.navArgs
 import com.cyb3rko.techniklogger.*
-import com.cyb3rko.techniklogger.CURRENT_YEAR
 import com.cyb3rko.techniklogger.data.HourMinute
-import com.cyb3rko.techniklogger.data.objects.Mission
 import com.cyb3rko.techniklogger.data.ParseController
+import com.cyb3rko.techniklogger.data.objects.Mission
 import com.cyb3rko.techniklogger.databinding.FragmentMissionPusherBinding
+import com.cyb3rko.techniklogger.modals.DatePickerBuilder
 import com.cyb3rko.techniklogger.modals.TimePickerBuilder
-import com.google.android.material.datepicker.MaterialDatePicker
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import com.parse.ParseObject
-import java.text.SimpleDateFormat
-import java.util.*
 
 class MissionPusherFragment : Fragment() {
     private var _binding: FragmentMissionPusherBinding? = null
@@ -36,8 +32,6 @@ class MissionPusherFragment : Fragment() {
     private var duration = 0f
     private lateinit var location: String
     private lateinit var name: String
-    @SuppressLint("SimpleDateFormat")
-    private val simpleDateFormat = SimpleDateFormat("dd.MM.yyyy")
 
     // This property is only valid between onCreateView and onDestroyView.
     private val binding get() = _binding!!
@@ -54,14 +48,12 @@ class MissionPusherFragment : Fragment() {
         getArgumentInformation()
         restoreInformation()
 
-        val builder = MaterialDatePicker.Builder.datePicker()
-            .setTitleText("Datum")
+        val datePickerBuilder = DatePickerBuilder()
         val timePickerBuilder = TimePickerBuilder()
 
         binding.dateButton.setOnClickListener {
             if (date != "") {
-                val dateInMillis = simpleDateFormat.parse(date)!!.time
-                builder.setSelection(dateInMillis + 7200000)
+                datePickerBuilder.setInitialDate(date)
             }
 
             if (time != "") {
@@ -71,21 +63,19 @@ class MissionPusherFragment : Fragment() {
                     initialEnd = HourMinute.fromString(times[1])
                 }
             }
-            val picker = builder.build()
-            picker.addOnPositiveButtonClickListener {
-                date = simpleDateFormat.format(Date(it))
-                binding.dateView.text = Html.fromHtml("<b>Datum:</b><br/>${date}")
 
-                timePickerBuilder.show(requireActivity(), null) { time, duration ->
+            datePickerBuilder.show(requireActivity()) { newDate ->
+                binding.dateView.text = Html.fromHtml("<b>Datum:</b><br/>${newDate}")
+                date = newDate
+
+                timePickerBuilder.show(requireActivity(), null) { newTime, newDuration ->
                     binding.durationView.text = Html.fromHtml(
-                        "<b>Dauer:</b> $time Uhr, $duration Stunden"
+                        "<b>Dauer:</b> $newTime Uhr, $newDuration Stunden"
                     )
-                    this.time = time
-                    this.duration = duration
+                    time = newTime
+                    duration = newDuration
                 }
             }
-
-            picker.show(requireActivity().supportFragmentManager, picker.tag)
         }
 
         if (childKey != "") {

app/src/main/java/com/cyb3rko/techniklogger/modals/DatePickerBuilder.kt

@@ -0,0 +1,37 @@
+package com.cyb3rko.techniklogger.modals
+
+import android.annotation.SuppressLint
+import androidx.fragment.app.FragmentActivity
+import com.google.android.material.datepicker.MaterialDatePicker
+import java.text.SimpleDateFormat
+import java.util.*
+
+internal class DatePickerBuilder {
+    companion object {
+        private const val TAG = "DatePickerDialog"
+    }
+
+    @SuppressLint("SimpleDateFormat")
+    private val simpleDateFormat = SimpleDateFormat("dd.MM.yyyy")
+    private var initialDate = 0L
+
+    internal fun setInitialDate(date: String) {
+        initialDate = simpleDateFormat.parse(date)!!.time + 7200000
+    }
+
+    internal fun show(activity: FragmentActivity, action: (date: String) -> Unit) {
+        val builder = MaterialDatePicker.Builder.datePicker()
+            .setTitleText("Datum")
+
+        if (initialDate != 0L) builder.setSelection(initialDate)
+
+        val picker = builder.build()
+
+        picker.addOnPositiveButtonClickListener {
+            val date = simpleDateFormat.format(Date(it))
+            action(date)
+        }
+
+        picker.show(activity.supportFragmentManager, TAG)
+    }
+}