diff --git a/docs/api/create-canvas-context-async.md b/docs/api/create-canvas-context-async.md
index 9e5d53959932f24798d6442b731132c8bfe72f4d..367d249c53d1c7c78da2545007cec25a7c62056c 100644
--- a/docs/api/create-canvas-context-async.md
+++ b/docs/api/create-canvas-context-async.md
@@ -27,3 +27,8 @@ uni.createCanvasContextAsync 方法可以异步获取页面上指定id的canvas
 <!-- UTSAPIJSON.general_type.name -->
 
 <!-- UTSAPIJSON.general_type.param -->
+
+
+**提示**
+
+- toDataURL() App-Android 暂不支持在页面的onLoad和组件的onMount生命周期中调用