feat: 优化

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

@@ -20,7 +20,7 @@ object OldRule {
         } catch (e: Exception) {
             null
         }
-        runCatching {
+        try {
             if (sourceAny?.ruleToc == null) {
                 source.apply {
                     val jsonItem = jsonPath.parse(json.trim())
@@ -125,6 +125,8 @@ object OldRule {
                     GSON.fromJsonObject(GSON.toJson(sourceAny.ruleContent))
                 }
             }
+        } catch (e: Exception) {
+            e.printStackTrace()
         }
         return source
     }

app/src/main/java/io/legado/app/ui/book/source/manage/BookSourceViewModel.kt

@@ -233,6 +233,7 @@ class BookSourceViewModel(application: Application) : BaseViewModel(application)
                 else -> "格式不对"
             }
         }.onError {
+            it.printStackTrace()
             finally(it.localizedMessage ?: "")
         }.onSuccess {
             finally(it)
@@ -240,7 +241,11 @@ class BookSourceViewModel(application: Application) : BaseViewModel(application)
     }
 
     private fun importSourceUrl(url: String): Int {
-        HttpHelper.simpleGet(url, "UTF-8")?.let { body ->
+        HttpHelper.simpleGet(url, "UTF-8").let { body ->
+            if (body == null) {
+                toast("访问网站失败")
+                return 0
+            }
             val bookSources = mutableListOf<BookSource>()
             val items: List<Map<String, Any>> = jsonPath.parse(body).read("$")
             for (item in items) {
@@ -252,6 +257,5 @@ class BookSourceViewModel(application: Application) : BaseViewModel(application)
             App.db.bookSourceDao().insert(*bookSources.toTypedArray())
             return bookSources.size
         }
-        return 0
     }
 }