feat: 优化代码

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

@@ -32,9 +32,7 @@ object Backup {
         val lastBackup = context.getPrefLong(PreferKey.lastBackup)
         if (lastBackup + TimeUnit.DAYS.toMillis(1) < System.currentTimeMillis()) {
             Coroutine.async {
-                context.getPrefString(PreferKey.backupPath)?.let {
-                    backup(context, it, true)
-                }
+                backup(context, context.getPrefString(PreferKey.backupPath) ?: "", true)
             }
         }
     }
@@ -71,7 +69,11 @@ object Backup {
                 if (path.isContentPath()) {
                     copyBackup(context, Uri.parse(path), isAuto)
                 } else {
-                    copyBackup(File(path), isAuto)
+                    if (path.isEmpty()) {
+                        copyBackup(context.getExternalFilesDir(null)!!, false)
+                    } else {
+                        copyBackup(File(path), isAuto)
+                    }
                 }
             }
         }

app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt

@@ -134,6 +134,10 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_boo
             timeBatteryReceiver = null
         }
         upSystemUiVisibility()
+        if (!BuildConfig.DEBUG) {
+            SyncBookProgress.uploadBookProgress()
+            Backup.autoBack(this)
+        }
     }
 
     /**

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

@@ -15,6 +15,7 @@ import io.legado.app.base.VMBaseActivity
 import io.legado.app.constant.EventBus
 import io.legado.app.constant.PreferKey
 import io.legado.app.help.AppConfig
+import io.legado.app.help.storage.Backup
 import io.legado.app.lib.theme.ATH
 import io.legado.app.service.BaseReadAloudService
 import io.legado.app.service.help.ReadAloud
@@ -113,6 +114,13 @@ class MainActivity : VMBaseActivity<MainViewModel>(R.layout.activity_main),
         return super.onKeyUp(keyCode, event)
     }
 
+    override fun onPause() {
+        super.onPause()
+        if (!BuildConfig.DEBUG) {
+            Backup.autoBack(this)
+        }
+    }
+
     override fun onDestroy() {
         super.onDestroy()
         ReadAloud.stop(this)