修改了配色，添加了解除绑定提示

lib_face/src/main/java/com/sw/plate/utils/comn/SerialApi.java

@@ -36,6 +36,10 @@ public class SerialApi {
     }
 
     public static void close() {
+        if (serialPort != null) {
+            serialPort.close();
+            serialPort = null;
+        }
         if (serialPortManager != null) {
             serialPortManager.close();
         }