up

app/src/main/java/io/legado/app/data/AppDatabase.kt

@@ -11,21 +11,23 @@ import io.legado.app.help.storage.Restore
 
 
 @Database(
-    entities = [Book::class, BookGroup::class, BookSource::class, BookChapter::class, ReplaceRule::class,
-        SearchBook::class, SearchKeyword::class, Cookie::class, RssSource::class, Bookmark::class,
-        RssArticle::class],
+    entities = [Book::class, BookGroup::class, BookSource::class, BookChapter::class,
+        ReplaceRule::class, SearchBook::class, SearchKeyword::class, Cookie::class,
+        RssSource::class, Bookmark::class, RssArticle::class],
     version = 3,
     exportSchema = true
 )
 abstract class AppDatabase : RoomDatabase() {
 
     companion object {
+        var DestructiveMigration = false
         private const val DATABASE_NAME = "legado.db"
         fun createDatabase(context: Context): AppDatabase {
             return Room.databaseBuilder(context, AppDatabase::class.java, DATABASE_NAME)
                 .fallbackToDestructiveMigration()
                 .addCallback(object : Callback() {
                     override fun onDestructiveMigration(db: SupportSQLiteDatabase) {
+                        DestructiveMigration = true
                         Restore.restore()
                     }
                 })

app/src/main/java/io/legado/app/ui/main/MainActivity.kt

@@ -13,6 +13,7 @@ import io.legado.app.BuildConfig
 import io.legado.app.R
 import io.legado.app.base.VMBaseActivity
 import io.legado.app.constant.Bus
+import io.legado.app.data.AppDatabase
 import io.legado.app.help.ActivityHelp
 import io.legado.app.help.permission.Permissions
 import io.legado.app.help.permission.PermissionsCompat
@@ -62,6 +63,7 @@ class MainActivity : VMBaseActivity<MainViewModel>(R.layout.activity_main),
     }
 
     private fun restore() {
+        if (AppDatabase.DestructiveMigration) return
         launch {
             if (withContext(IO) { App.db.bookDao().allBookCount == 0 }) {
                 alert(title = "导入") {