Show ProgressDrawable when backup

app/src/main/java/xyz/quaver/pupil/ui/MainActivity.kt

@@ -118,7 +118,7 @@ class MainActivity :
                     onFailure = {
                         Snackbar.make(binding.contents.recyclerview, R.string.settings_backup_failed, Snackbar.LENGTH_LONG).show()
                     }, onSuccess = {
-                        Snackbar.make(binding.contents.recyclerview, getString(R.string.settings_restore_success, it.size), Snackbar.LENGTH_LONG).show()
+                        Snackbar.make(binding.contents.recyclerview, getString(R.string.settings_restore_success, it), Snackbar.LENGTH_LONG).show()
                     }
                 )
             }

app/src/main/java/xyz/quaver/pupil/ui/fragment/ManageFavoritesFragment.kt

@@ -19,14 +19,21 @@
 package xyz.quaver.pupil.ui.fragment
 
 import android.content.Intent
+import android.content.res.Resources
+import android.graphics.PorterDuff
+import android.graphics.PorterDuffColorFilter
 import android.os.Bundle
 import android.widget.EditText
 import android.widget.TextView
 import androidx.appcompat.app.AlertDialog
 import androidx.core.content.ContextCompat
+import androidx.core.graphics.drawable.DrawableCompat
 import androidx.preference.Preference
 import androidx.preference.PreferenceFragmentCompat
+import androidx.swiperefreshlayout.widget.CircularProgressDrawable
 import com.google.android.material.snackbar.Snackbar
+import kotlinx.coroutines.MainScope
+import kotlinx.coroutines.launch
 import kotlinx.serialization.json.Json
 import kotlinx.serialization.json.buildJsonObject
 import okhttp3.*
@@ -35,6 +42,7 @@ import xyz.quaver.pupil.client
 import xyz.quaver.pupil.util.restore
 import java.io.File
 import java.io.IOException
+import kotlin.math.roundToInt
 
 class ManageFavoritesFragment : PreferenceFragmentCompat() {
 
@@ -48,6 +56,25 @@ class ManageFavoritesFragment : PreferenceFragmentCompat() {
         val context = context ?: return
 
         findPreference<Preference>("backup")?.setOnPreferenceClickListener {
+            val iconSize = (24 * Resources.getSystem().displayMetrics.density).roundToInt()
+            val strokeWidth = (3 * Resources.getSystem().displayMetrics.density)
+
+            val icon = object: CircularProgressDrawable(context) {
+                override fun getIntrinsicHeight(): Int {
+                    return iconSize
+                }
+
+                override fun getIntrinsicWidth(): Int {
+                    return iconSize
+                }
+            }
+
+            icon.strokeWidth = strokeWidth
+            icon.colorFilter = PorterDuffColorFilter(ContextCompat.getColor(context, R.color.colorAccent), PorterDuff.Mode.SRC_IN)
+            DrawableCompat.setTint(icon, ContextCompat.getColor(context, R.color.colorAccent))
+            icon.start()
+            it.icon = icon
+
             val favorites = runCatching {
                 Json.parseToJsonElement(File(ContextCompat.getDataDir(context), "favorites.json").readText())
             }.getOrNull()
@@ -73,10 +100,18 @@ class ManageFavoritesFragment : PreferenceFragmentCompat() {
             client.newCall(request).enqueue(object: Callback {
                 override fun onFailure(call: Call, e: IOException) {
                     val view = view ?: return
+
+                    MainScope().launch {
+                        it.icon = null
+                    }
                     Snackbar.make(view, R.string.settings_backup_failed, Snackbar.LENGTH_LONG).show()
                 }
 
                 override fun onResponse(call: Call, response: Response) {
+                    MainScope().launch {
+                        it.icon = null
+                    }
+
                     if (response.code() != 200) {
                         response.close()
                         return