Added kotlinx-serialization plugin

app/build.gradle

@@ -2,6 +2,7 @@ plugins {
     id 'com.android.application'
     id 'kotlin-android'
     id 'kotlin-android-extensions'
+    id 'org.jetbrains.kotlin.plugin.serialization' version "$kotlin_version"
 }
 
 def keystorePropertiesFile = rootProject.file("keystore.properties")
@@ -67,4 +68,5 @@ dependencies {
     implementation 'com.github.SimpleMobileTools:Simple-Commons:35d685c042'
     implementation 'com.github.tibbi:IndicatorFastScroll:4524cd0b61'
     implementation 'me.grantland:autofittextview:0.2.1'
+    implementation "org.jetbrains.kotlinx:kotlinx-serialization-json:1.4.1"
 }

app/src/main/kotlin/com/simplemobiletools/dialer/activities/SettingsActivity.kt

@@ -7,10 +7,6 @@ import android.os.Build
 import android.os.Bundle
 import android.view.Menu
 import androidx.activity.result.contract.ActivityResultContracts
-import com.google.gson.Gson
-import com.google.gson.JsonParseException
-import com.google.gson.JsonSyntaxException
-import com.google.gson.reflect.TypeToken
 import com.simplemobiletools.commons.activities.ManageBlockedNumbersActivity
 import com.simplemobiletools.commons.dialogs.ChangeDateTimeFormatDialog
 import com.simplemobiletools.commons.dialogs.FeatureLockedDialog
@@ -25,6 +21,10 @@ import com.simplemobiletools.dialer.extensions.config
 import com.simplemobiletools.dialer.helpers.RecentsHelper
 import com.simplemobiletools.dialer.models.RecentCall
 import kotlinx.android.synthetic.main.activity_settings.*
+import kotlinx.serialization.SerializationException
+import kotlinx.serialization.decodeFromString
+import kotlinx.serialization.encodeToString
+import kotlinx.serialization.json.Json
 import java.util.*
 import kotlin.system.exitProcess
 
@@ -308,8 +308,7 @@ class SettingsActivity : SimpleActivity() {
                 inputStream.bufferedReader().readText()
             }
 
-            val recentsType = object : TypeToken<List<RecentCall>>() {}.type
-            val objects = Gson().fromJson<List<RecentCall>>(jsonString, recentsType).orEmpty()
+            val objects = Json.decodeFromString<List<RecentCall>>(jsonString)
 
             if (objects.isEmpty()) {
                 toast(R.string.no_entries_for_importing)
@@ -319,9 +318,9 @@ class SettingsActivity : SimpleActivity() {
             RecentsHelper(this).restoreRecentCalls(this, objects) {
                 toast(R.string.importing_successful)
             }
-        } catch (_: JsonParseException) {
+        } catch (_: SerializationException) {
             toast(R.string.invalid_file_format)
-        } catch (_: JsonSyntaxException) {
+        } catch (_: IllegalArgumentException) {
             toast(R.string.invalid_file_format)
         } catch (e: Exception) {
             showErrorToast(e)
@@ -335,7 +334,7 @@ class SettingsActivity : SimpleActivity() {
             try {
                 val outputStream = contentResolver.openOutputStream(uri)!!
 
-                val jsonString = Gson().toJson(recents)
+                val jsonString = Json.encodeToString(recents)
                 outputStream.use {
                     it.write(jsonString.toByteArray())
                 }

app/src/main/kotlin/com/simplemobiletools/dialer/models/RecentCall.kt

@@ -2,12 +2,12 @@ package com.simplemobiletools.dialer.models
 
 import android.telephony.PhoneNumberUtils
 import com.simplemobiletools.commons.extensions.normalizePhoneNumber
-import java.io.Serializable
 
 /**
  * Used at displaying recent calls.
  * For contacts with multiple numbers specify the number and type
  */
+@kotlinx.serialization.Serializable
 data class RecentCall(
     val id: Int,
     val phoneNumber: String,
@@ -21,7 +21,7 @@ data class RecentCall(
     val specificNumber: String,
     val specificType: String,
     val isUnknownNumber: Boolean,
-) : Serializable {
+) {
     fun doesContainPhoneNumber(text: String): Boolean {
         val normalizedText = text.normalizePhoneNumber()
         return PhoneNumberUtils.compare(phoneNumber.normalizePhoneNumber(), normalizedText) ||
@@ -29,5 +29,4 @@ data class RecentCall(
             phoneNumber.normalizePhoneNumber().contains(normalizedText) ||
             phoneNumber.contains(normalizedText)
     }
-
 }

app/src/main/res/layout/dialog_export_call_history.xml

@@ -16,7 +16,7 @@
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:layout_marginBottom="@dimen/medium_margin"
-            android:hint="@string/filename"
+            android:hint="@string/filename_without_json"
             android:paddingStart="@dimen/activity_margin"
             android:paddingEnd="@dimen/activity_margin">
 
@@ -30,16 +30,5 @@
 
         </com.simplemobiletools.commons.views.MyTextInputLayout>
 
-        <ImageView
-            android:id="@+id/export_call_history_divider"
-            android:layout_width="match_parent"
-            android:layout_height="1px"
-            android:layout_marginStart="@dimen/activity_margin"
-            android:layout_marginTop="@dimen/medium_margin"
-            android:layout_marginEnd="@dimen/activity_margin"
-            android:layout_marginBottom="@dimen/medium_margin"
-            android:background="@color/divider_grey"
-            android:importantForAccessibility="no" />
-
     </LinearLayout>
 </ScrollView>