diff --git a/floatwindow/build.gradle b/floatwindow/build.gradle
index e24e4ee..b876419 100644
--- a/floatwindow/build.gradle
+++ b/floatwindow/build.gradle
@@ -1,7 +1,7 @@
 apply plugin: 'com.android.library'
 
 android {
-    compileSdkVersion 26
+    compileSdkVersion 27
     buildToolsVersion "26.0.2"
 
 
diff --git a/floatwindow/src/main/java/com/yhao/floatwindow/PermissionUtil.java b/floatwindow/src/main/java/com/yhao/floatwindow/PermissionUtil.java
index e6e25fb..b2bcea2 100644
--- a/floatwindow/src/main/java/com/yhao/floatwindow/PermissionUtil.java
+++ b/floatwindow/src/main/java/com/yhao/floatwindow/PermissionUtil.java
@@ -28,7 +28,7 @@ static boolean hasPermission(Context context) {
     }
 
     static boolean hasPermissionOnActivityResult(Context context) {
-        if (Build.VERSION.SDK_INT == Build.VERSION_CODES.O) {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
             return hasPermissionForO(context);
         }
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {