fix lifecycle issue

app/src/main/java/com/github/libretube/dialogs/BackupDialog.kt

@@ -1,10 +1,8 @@
 package com.github.libretube.dialogs
 
 import android.app.Dialog
-import android.net.Uri
 import android.os.Bundle
 import androidx.activity.result.ActivityResultLauncher
-import androidx.activity.result.contract.ActivityResultContracts
 import androidx.fragment.app.DialogFragment
 import androidx.recyclerview.widget.LinearLayoutManager
 import com.github.libretube.R
@@ -13,25 +11,15 @@ import com.github.libretube.databinding.DialogBackupBinding
 import com.github.libretube.db.DatabaseHolder
 import com.github.libretube.extensions.await
 import com.github.libretube.obj.BackupFile
-import com.github.libretube.util.BackupHelper
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
 
-class BackupDialog() : DialogFragment() {
+class BackupDialog(
+    private val createBackupFile: (BackupFile) -> Unit
+) : DialogFragment() {
     private lateinit var binding: DialogBackupBinding
-    private lateinit var createBackupFile: ActivityResultLauncher<String>
 
     val backupFile = BackupFile()
 
-    override fun onCreate(savedInstanceState: Bundle?) {
-        createBackupFile = registerForActivityResult(
-            ActivityResultContracts.CreateDocument("application/json")
-        ) { uri: Uri? ->
-            BackupHelper(requireContext()).advancedBackup(uri, backupFile)
-        }
-
-        super.onCreate(savedInstanceState)
-    }
-
     override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
         val backupOptions = listOf(
             R.string.watch_history,
@@ -77,7 +65,7 @@ class BackupDialog() : DialogFragment() {
                     }
                 }.await()
 
-                createBackupFile.launch("libretube_backup.json")
+                createBackupFile(backupFile)
             }
             .create()
     }

app/src/main/java/com/github/libretube/preferences/AdvancedSettings.kt

@@ -11,6 +11,7 @@ import com.github.libretube.R
 import com.github.libretube.activities.SettingsActivity
 import com.github.libretube.constants.PreferenceKeys
 import com.github.libretube.dialogs.BackupDialog
+import com.github.libretube.obj.BackupFile
 import com.github.libretube.util.BackupHelper
 import com.github.libretube.util.ImageHelper
 import com.github.libretube.util.PreferenceHelper
@@ -25,6 +26,8 @@ class AdvancedSettings : MaterialPreferenceFragment() {
 
     // backup and restore database
     private lateinit var getBackupFile: ActivityResultLauncher<String>
+    private lateinit var createBackupFile: ActivityResultLauncher<String>
+    private var backupFile = BackupFile()
 
     override fun onCreate(savedInstanceState: Bundle?) {
         getPrefFile =
@@ -45,6 +48,13 @@ class AdvancedSettings : MaterialPreferenceFragment() {
             ) { uri: Uri? ->
                 BackupHelper(requireContext()).restoreAdvancedBackup(uri)
             }
+
+        createBackupFile = registerForActivityResult(
+            CreateDocument("application/json")
+        ) { uri: Uri? ->
+            BackupHelper(requireContext()).advancedBackup(uri, backupFile)
+        }
+
         super.onCreate(savedInstanceState)
     }
 
@@ -83,7 +93,10 @@ class AdvancedSettings : MaterialPreferenceFragment() {
 
         val advancesBackup = findPreference<Preference>("backup")
         advancesBackup?.setOnPreferenceClickListener {
-            BackupDialog()
+            BackupDialog {
+                backupFile = it
+                createBackupFile.launch("backup.json")
+            }
                 .show(childFragmentManager, null)
             true
         }

app/src/main/java/com/github/libretube/util/BackupHelper.kt

@@ -2,10 +2,12 @@ package com.github.libretube.util
 
 import android.content.Context
 import android.net.Uri
+import android.util.Log
 import androidx.core.content.edit
 import androidx.preference.PreferenceManager
 import com.fasterxml.jackson.databind.ObjectMapper
 import com.github.libretube.db.DatabaseHolder
+import com.github.libretube.extensions.TAG
 import com.github.libretube.extensions.query
 import com.github.libretube.obj.BackupFile
 import java.io.FileInputStream