diff --git a/.gitignore b/.gitignore
index 39fb081..5f8d8c1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,3 +7,4 @@
 /build
 /captures
 .externalNativeBuild
+.idea/vcs.xml
diff --git a/.idea/misc.xml b/.idea/misc.xml
index 3963879..75dac50 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -24,7 +24,7 @@
       </value>
     </option>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">
diff --git a/app/src/main/java/xyz/mtfos/btdemo/MainActivity.kt b/app/src/main/java/xyz/mtfos/btdemo/MainActivity.kt
index 010360c..da4d9a8 100644
--- a/app/src/main/java/xyz/mtfos/btdemo/MainActivity.kt
+++ b/app/src/main/java/xyz/mtfos/btdemo/MainActivity.kt
@@ -30,22 +30,18 @@ class MainActivity : Activity() {
             ble?.startScan()
         }
 
-        th = Thread(Runnable { ->
-            {}.run {
-                thrun = true
-                while (thrun) {
-                    System.out.println("state ===== " + ble?.mState)
-                    if (ble?.mState == ble?.CONNECTED) {
-                        uiHandler.post {
-                            run {
-                                btn.isEnabled = true
-                            }
-                        }
-                        thrun = false
-                        break
+        th = Thread(Runnable {
+            thrun = true
+            while (thrun) {
+                System.out.println("state ===== " + ble?.mState)
+                if (ble?.mState == ble?.CONNECTED) {
+                    uiHandler.post {
+                        btn.isEnabled = true
                     }
-                    Thread.sleep(200)
+                    thrun = false
+                    break
                 }
+                Thread.sleep(200)
             }
         })
         th?.start()