android: Added rememberSaveable in pref screens (#1509)

apps/android/app/src/main/java/chat/simplex/app/model/SimpleXAPI.kt

@@ -2202,6 +2202,7 @@ sealed class ContactFeatureAllowed {
     }
 }
 
+@Serializable
 data class ContactFeaturesAllowed(
   val fullDelete: ContactFeatureAllowed,
   val voice: ContactFeatureAllowed

apps/android/app/src/main/java/chat/simplex/app/views/chat/ContactPreferences.kt

@@ -11,6 +11,7 @@ import androidx.compose.foundation.layout.*
 import androidx.compose.material.MaterialTheme
 import androidx.compose.material.Text
 import androidx.compose.runtime.*
+import androidx.compose.runtime.saveable.rememberSaveable
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color

apps/android/app/src/main/java/chat/simplex/app/views/chat/group/GroupPreferences.kt

@@ -11,6 +11,7 @@ import androidx.compose.foundation.layout.*
 import androidx.compose.material.MaterialTheme
 import androidx.compose.material.Text
 import androidx.compose.runtime.*
+import androidx.compose.runtime.saveable.rememberSaveable
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.res.stringResource

apps/android/app/src/main/java/chat/simplex/app/views/helpers/Util.kt

@@ -29,7 +29,10 @@ import androidx.core.content.FileProvider
 import androidx.core.text.HtmlCompat
 import chat.simplex.app.*
 import chat.simplex.app.model.CIFile
+import chat.simplex.app.model.json
 import kotlinx.coroutines.*
+import kotlinx.serialization.decodeFromString
+import kotlinx.serialization.encodeToString
 import java.io.*
 import java.text.SimpleDateFormat
 import java.util.*
@@ -462,3 +465,9 @@ val LongRange.Companion.saver
     save = { it.value.first to it.value.last },
     restore = { mutableStateOf(it.first..it.second) }
     )
+
+/* Make sure that T class has @Serializable annotation */
+inline fun <reified T> serializableSaver(): Saver<T, *> = Saver(
+    save = { json.encodeToString(it) },
+    restore = { json.decodeFromString(it) }
+  )

apps/android/app/src/main/java/chat/simplex/app/views/usersettings/Preferences.kt

@@ -10,6 +10,7 @@ import androidx.compose.foundation.layout.*
 import androidx.compose.material.MaterialTheme
 import androidx.compose.material.Text
 import androidx.compose.runtime.*
+import androidx.compose.runtime.saveable.rememberSaveable
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.res.stringResource