add sync folder picker to KeeShare settings

SAF-based folder picker with persistent URI permissions. Shows
selected folder in preference summary.

Author: Lcstyle

app/src/main/java/com/kunzisoft/keepass/settings/NestedAppSettingsFragment.kt

@@ -367,8 +367,37 @@ class NestedAppSettingsFragment : NestedSettingsFragment() {
         warningAlertDialog?.show()
     }
 
+    private val keeShareFolderPickerLauncher = registerForActivityResult(
+        androidx.activity.result.contract.ActivityResultContracts.OpenDocumentTree()
+    ) { treeUri ->
+        if (treeUri != null) {
+            val takeFlags = Intent.FLAG_GRANT_READ_URI_PERMISSION or
+                Intent.FLAG_GRANT_WRITE_URI_PERMISSION
+            requireContext().contentResolver.takePersistableUriPermission(treeUri, takeFlags)
+
+            PreferencesUtil.setKeeShareSyncFolderUri(requireContext(), treeUri.toString())
+
+            // Update the preference summary to show the selected path
+            findPreference<Preference>(getString(R.string.keeshare_sync_folder_key))?.summary =
+                treeUri.lastPathSegment ?: treeUri.toString()
+        }
+    }
+
     private fun onCreateKeeSharePreferences(rootKey: String?) {
         setPreferencesFromResource(R.xml.preferences_keeshare, rootKey)
+
+        // Show current sync folder URI in summary
+        val syncFolderPref = findPreference<Preference>(getString(R.string.keeshare_sync_folder_key))
+        val savedUri = PreferencesUtil.getKeeShareSyncFolderUri(requireContext())
+        if (!savedUri.isNullOrEmpty()) {
+            val uri = android.net.Uri.parse(savedUri)
+            syncFolderPref?.summary = uri.lastPathSegment ?: savedUri
+        }
+
+        syncFolderPref?.setOnPreferenceClickListener {
+            keeShareFolderPickerLauncher.launch(null)
+            true
+        }
     }
 
     private fun onCreateAppearancePreferences(rootKey: String?) {

app/src/main/java/com/kunzisoft/keepass/settings/PreferencesUtil.kt

@@ -866,6 +866,18 @@ object PreferencesUtil {
         }
     }
 
+    fun getKeeShareSyncFolderUri(context: Context): String? {
+        val prefs = PreferenceManager.getDefaultSharedPreferences(context)
+        return prefs.getString(context.getString(R.string.keeshare_sync_folder_key), null)
+    }
+
+    fun setKeeShareSyncFolderUri(context: Context, uri: String?) {
+        PreferenceManager.getDefaultSharedPreferences(context).edit().apply {
+            putString(context.getString(R.string.keeshare_sync_folder_key), uri)
+            apply()
+        }
+    }
+
     fun getKeeShareStaleDays(context: Context): Int {
         val prefs = PreferenceManager.getDefaultSharedPreferences(context)
         return prefs.getInt(context.getString(R.string.keeshare_stale_days_key), 90)

app/src/main/res/values/strings.xml

@@ -810,6 +810,10 @@
     <string name="keeshare_device_id_key" translatable="false">keeshare_device_id</string>
     <string name="keeshare_device_id_title">Device ID</string>
     <string name="keeshare_device_id_summary">Short identifier for this device (auto-generated, or set manually)</string>
+    <string name="keeshare_sync_folder_key" translatable="false">keeshare_sync_folder</string>
+    <string name="keeshare_sync_folder_title">Sync folder</string>
+    <string name="keeshare_sync_folder_summary">Select the shared folder where KeeShare containers are stored</string>
+    <string name="keeshare_sync_folder_not_set">Not configured</string>
     <string name="keeshare_last_sync_time_key" translatable="false">keeshare_last_sync_time</string>
     <string name="keeshare_stale_days_key" translatable="false">keeshare_stale_days</string>
 </resources>

app/src/main/res/xml/preferences_keeshare.xml

@@ -23,5 +23,9 @@
             android:key="@string/keeshare_device_id_key"
             android:title="@string/keeshare_device_id_title"
             android:summary="@string/keeshare_device_id_summary" />
+        <Preference
+            android:key="@string/keeshare_sync_folder_key"
+            android:title="@string/keeshare_sync_folder_title"
+            android:summary="@string/keeshare_sync_folder_not_set" />
     </PreferenceCategory>
 </PreferenceScreen>