优化

app/src/main/java/io/legado/app/data/dao/BookGroupDao.kt

@@ -58,6 +58,9 @@ interface BookGroupDao {
     @get:Query("SELECT * FROM book_groups ORDER BY `order`")
     val all: List<BookGroup>
 
+    @get:Query("select count(*) < 64 from book_groups where groupId >= 0 or groupId == ${Long.MIN_VALUE}")
+    val canAddGroup: Boolean
+
     @Query("update book_groups set show = 1 where groupId = :groupId")
     fun enableGroup(groupId: Long)
 

app/src/main/java/io/legado/app/help/TTS.kt

@@ -77,7 +77,7 @@ class TTS {
     }
 
     private fun addTextToSpeakList() {
-        textToSpeech?.let { tts ->
+        val tts = textToSpeech ?: return
         kotlin.runCatching {
             var result = tts.speak("", TextToSpeech.QUEUE_FLUSH, null, null)
             if (result == TextToSpeech.ERROR) {
@@ -96,7 +96,6 @@ class TTS {
             appCtx.toastOnUi(it.localizedMessage)
         }
     }
-    }
 
     /**
      * 初始化监听

app/src/main/java/io/legado/app/help/storage/Backup.kt

@@ -6,6 +6,7 @@ import androidx.documentfile.provider.DocumentFile
 import io.legado.app.constant.AppLog
 import io.legado.app.constant.PreferKey
 import io.legado.app.data.appDb
+import io.legado.app.exception.NoStackTraceException
 import io.legado.app.help.AppWebDav
 import io.legado.app.help.DirectLinkUpload
 import io.legado.app.help.config.AppConfig
@@ -186,6 +187,7 @@ object Backup {
                 }
                 AppWebDav.backUpWebDav(zipFileName)
             }
+            FileUtils.delete(backupPath)
         }
     }
 
@@ -203,15 +205,18 @@ object Backup {
     @Throws(Exception::class)
     @Suppress("SameParameterValue")
     private fun copyBackup(context: Context, uri: Uri, fileName: String) {
-        DocumentFile.fromTreeUri(context, uri)?.let { treeDoc ->
+        val treeDoc = DocumentFile.fromTreeUri(context, uri)!!
         treeDoc.findFile(fileName)?.delete()
-            treeDoc.createFile("", fileName)?.openOutputStream()?.use { outputS ->
+        val fileDoc = treeDoc.createFile("", fileName)
-                FileInputStream(File(zipFilePath)).use { inputS ->
+            ?: throw NoStackTraceException("创建文件失败")
+        val outputS = fileDoc.openOutputStream()
+            ?: throw NoStackTraceException("打开OutputStream失败")
+        outputS.use {
+            FileInputStream(zipFilePath).use { inputS ->
                 inputS.copyTo(outputS)
             }
         }
     }
-    }
 
     @Throws(Exception::class)
     @Suppress("SameParameterValue")

app/src/main/java/io/legado/app/ui/book/group/GroupManageDialog.kt

@@ -26,6 +26,7 @@ import io.legado.app.ui.widget.recycler.VerticalDivider
 import io.legado.app.utils.applyTint
 import io.legado.app.utils.setLayout
 import io.legado.app.utils.showDialogFragment
+import io.legado.app.utils.toastOnUi
 import io.legado.app.utils.viewbindingdelegate.viewBinding
 import io.legado.app.utils.visible
 import kotlinx.coroutines.flow.conflate
@@ -82,7 +83,13 @@ class GroupManageDialog : BaseDialogFragment(R.layout.dialog_recycler_view),
 
     override fun onMenuItemClick(item: MenuItem?): Boolean {
         when (item?.itemId) {
-            R.id.menu_add -> showDialogFragment(GroupEditDialog())
+            R.id.menu_add -> {
+                if (appDb.bookGroupDao.canAddGroup) {
+                    showDialogFragment(GroupEditDialog())
+                } else {
+                    toastOnUi("分组已达上限(64个)")
+                }
+            }
         }
         return true
     }