提交人：jtm

提交内容：bug fixed

BusinessStep/src/main/java/com/develop/step/ui/recipes_detail/CookDetailActivity.kt

@@ -116,10 +116,12 @@ class CookDetailActivity : CommonBVMActivity<ActivityCookDetailBinding, CookDeta
             updateDownloadButton(it)
         }
         viewModel.portionSizeLiveData.observe(this) {
-            portionSizelJson = Json.encodeToString(it)
-            val jarsCount =
-                (it?.portionSize ?: 1).toString() + " " + getString(com.develop.common.R.string.jar)
-            binding.tvJarCount.text = jarsCount
+            if (it!=null){
+                portionSizelJson = Json.encodeToString(it)
+                val jarsCount =
+                    (it.portionSize ?: 1).toString() + " " + getString(com.develop.common.R.string.jar)
+                binding.tvJarCount.text = jarsCount
+            }
         }
     }