Add warning for MIUI users when trying to restore backups with MIUI Optimization disabled

app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsBackupController.kt

@@ -8,6 +8,7 @@ import android.content.Intent
 import android.net.Uri
 import android.os.Bundle
 import android.view.View
+import android.widget.Toast
 import androidx.core.net.toUri
 import androidx.core.os.bundleOf
 import androidx.documentfile.provider.DocumentFile
@@ -35,6 +36,7 @@ import eu.kanade.tachiyomi.util.preference.preference
 import eu.kanade.tachiyomi.util.preference.preferenceCategory
 import eu.kanade.tachiyomi.util.preference.summaryRes
 import eu.kanade.tachiyomi.util.preference.titleRes
+import eu.kanade.tachiyomi.util.system.MiuiUtil
 import eu.kanade.tachiyomi.util.system.toast
 import kotlinx.coroutines.flow.launchIn
 import kotlinx.coroutines.flow.onEach
@@ -76,6 +78,11 @@ class SettingsBackupController : SettingsController() {
             summaryRes = R.string.pref_restore_backup_summ
 
             onClick {
+                if (MiuiUtil.isMiui() && MiuiUtil.isMiuiOptimizationDisabled()) {
+                    context.toast(R.string.restore_miui_warning, Toast.LENGTH_LONG)
+                    return@onClick
+                }
+
                 if (!BackupRestoreService.isRunning(context)) {
                     val intent = Intent(Intent.ACTION_GET_CONTENT).apply {
                         addCategory(Intent.CATEGORY_OPENABLE)

app/src/main/java/eu/kanade/tachiyomi/util/system/MiuiUtil.kt

@@ -0,0 +1,38 @@
+package eu.kanade.tachiyomi.util.system
+
+import android.annotation.SuppressLint
+import timber.log.Timber
+
+object MiuiUtil {
+
+    fun isMiui(): Boolean {
+        return getSystemProperty("ro.miui.ui.version.name")?.isNotEmpty() ?: false
+    }
+
+    @SuppressLint("PrivateApi")
+    fun isMiuiOptimizationDisabled(): Boolean {
+        if ("0" == getSystemProperty("persist.sys.miui_optimization")) {
+            return true
+        }
+
+        return try {
+            Class.forName("android.miui.AppOpsUtils")
+                .getDeclaredMethod("isXOptMode")
+                .invoke(null) as Boolean
+        } catch (e: Exception) {
+            false
+        }
+    }
+
+    @SuppressLint("PrivateApi")
+    private fun getSystemProperty(key: String?): String? {
+        return try {
+            Class.forName("android.os.SystemProperties")
+                .getDeclaredMethod("get", String::class.java)
+                .invoke(null, key) as String
+        } catch (e: Exception) {
+            Timber.w(e, "Unable to use SystemProperties.get")
+            null
+        }
+    }
+}

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

@@ -418,6 +418,7 @@
     <string name="backup_choice">What do you want to backup?</string>
     <string name="creating_backup">Creating backup</string>
     <string name="creating_backup_error">Backup failed</string>
+    <string name="restore_miui_warning">MIUI Optimization must be enabled for restore to work correctly.</string>
     <string name="restore_in_progress">Restore is already in progress</string>
     <string name="restoring_backup">Restoring backup</string>
     <string name="restoring_backup_error">Restoring backup failed</string>