diff --git a/app/src/main/java/com/qj/picker/MDCalendarDialog.java b/app/src/main/java/com/qj/picker/MDCalendarDialog.java
index cbee1f7..ba7bc77 100644
--- a/app/src/main/java/com/qj/picker/MDCalendarDialog.java
+++ b/app/src/main/java/com/qj/picker/MDCalendarDialog.java
@@ -5,7 +5,6 @@
 import android.graphics.Color;
 import android.support.annotation.ColorInt;
 import android.support.annotation.DrawableRes;
-import android.support.annotation.StringRes;
 import android.view.View;
 import android.view.Window;
 import android.widget.Button;
@@ -97,7 +96,7 @@ public static class Builder {
         private @ColorInt
         int selectionColor = Color.parseColor("#03a9f4");
 
-        private @DrawableRes int sureBackGroundColor = R.drawable.login_btn_bg;
+        private @DrawableRes int sureBackGroundColor = R.drawable.default_button_bg;
 
         private OnDetermineSelectorListener onDetermineSelectorListener = null;
 
diff --git a/app/src/main/res/drawable/login_btn_bg.xml b/app/src/main/res/drawable/default_button_bg.xml
similarity index 100%
rename from app/src/main/res/drawable/login_btn_bg.xml
rename to app/src/main/res/drawable/default_button_bg.xml