优化

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

@@ -456,6 +456,7 @@ interface JsExtensions {
      */
     fun queryTTF(str: String?): QueryTTF? {
         str ?: return null
+        try {
             val key = md5Encode16(str)
             var qTTF = CacheManager.getQueryTTF(key)
             if (qTTF != null) return qTTF
@@ -478,6 +479,10 @@ interface JsExtensions {
             qTTF = QueryTTF(font)
             CacheManager.put(key, qTTF)
             return qTTF
+        } catch (e: Exception) {
+            Timber.e(e, "获取字体处理类出错")
+            throw e
+        }
     }
 
     /**