diff --git a/app/src/main/java/com/yinuo/safetywatcher/watcher/ui/HomeActivity.kt b/app/src/main/java/com/yinuo/safetywatcher/watcher/ui/HomeActivity.kt
index 46a9eec..87b0caa 100644
--- a/app/src/main/java/com/yinuo/safetywatcher/watcher/ui/HomeActivity.kt
+++ b/app/src/main/java/com/yinuo/safetywatcher/watcher/ui/HomeActivity.kt
@@ -165,8 +165,10 @@ class HomeActivity : NoOptionsActivity() {
     }
 
     private fun showTipView() {
-        TxtOverlay.getOverlayBitmap()?.let {
-            mBinding.tipView.setImageBitmap(it)
+        lifecycleScope.launch(Dispatchers.Main) {
+            TxtOverlay.getOverlayBitmap()?.let {
+                mBinding.tipView.setImageBitmap(it)
+            }
         }
     }
 
@@ -221,7 +223,7 @@ class HomeActivity : NoOptionsActivity() {
             warningList?.forEachIndexed { index, it ->
                 builder.append(it.gasName).append("浓度异常,")
                     .append("当前值: ${it.gasValue} ${it.unit}")
-                if (it.overRange){
+                if (it.overRange) {
                     builder.append("，且超过传感器量程")
                 }
                 if (index != warningList.size - 1) {