diff --git a/.idea/compiler.xml b/.idea/compiler.xml
index 245a82c..7d7ec2e 100644
--- a/.idea/compiler.xml
+++ b/.idea/compiler.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="CompilerConfiguration">
-    <bytecodeTargetLevel target="1.8" />
+    <bytecodeTargetLevel target="11" />
   </component>
 </project>
\ No newline at end of file
diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index 5e80d59..4f8dd3a 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -4,10 +4,8 @@
   <component name="GradleSettings">
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>
-        <option name="testRunner" value="PLATFORM" />
-        <option name="distributionType" value="DEFAULT_WRAPPED" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
-        <option name="gradleJvm" value="1.8" />
+        <option name="gradleJvm" value="#GRADLE_LOCAL_JAVA_HOME" />
         <option name="modules">
           <set>
             <option value="$PROJECT_DIR$" />
@@ -15,8 +13,7 @@
             <option value="$PROJECT_DIR$/playerview" />
           </set>
         </option>
-        <option name="resolveModulePerSourceSet" value="false" />
-        <option name="useQualifiedModuleNames" value="true" />
+        <option name="resolveExternalAnnotations" value="false" />
       </GradleProjectSettings>
     </option>
   </component>
diff --git a/.idea/migrations.xml b/.idea/migrations.xml
new file mode 100644
index 0000000..f8051a6
--- /dev/null
+++ b/.idea/migrations.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectMigrations">
+    <option name="MigrateToGradleLocalJavaHome">
+      <set>
+        <option value="$PROJECT_DIR$" />
+      </set>
+    </option>
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
index 3378229..a740c72 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -5,7 +5,7 @@
       <configuration PROFILE_NAME="Debug" CONFIG_NAME="Debug" />
     </configurations>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_11" default="true" project-jdk-name="11" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">
diff --git a/app/src/main/java/qianmu/container/mqtt/MQTTService.java b/app/src/main/java/qianmu/container/mqtt/MQTTService.java
index 8d74a27..b7b535c 100644
--- a/app/src/main/java/qianmu/container/mqtt/MQTTService.java
+++ b/app/src/main/java/qianmu/container/mqtt/MQTTService.java
@@ -268,6 +268,10 @@ public class MQTTService extends Service {
         public void onSuccess(IMqttToken arg0) {
             LoggerUtil.e(TAG, "连接成功 ");
             isConnected = true;
+            try {
+                // 先取消旧订阅（防止重复累积）
+                client.unsubscribe(myTopic);
+            } catch (MqttException e) { /* ignore */ }
             try {
                 // 订阅myTopic话题
                 client.subscribe(myTopic,2);
diff --git a/playerview/build.gradle b/playerview/build.gradle
index 49b7829..9af18d7 100644
--- a/playerview/build.gradle
+++ b/playerview/build.gradle
@@ -12,7 +12,7 @@ android {
         versionCode 4
         versionName "1.0.3"
 
-        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
 
     }
     buildTypes {
@@ -26,13 +26,13 @@ android {
 
 dependencies {
     api fileTree(dir: 'libs', include: ['*.jar'])
-    androidTestImplementation('com.android.support.test.espresso:espresso-core:2.2.2', {
-        exclude group: 'com.android.support', module: 'support-annotations'
-    })
+    testImplementation 'junit:junit:4.12'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.5'
+    androidTestImplementation 'androidx.test:runner:1.5.2'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'
     implementation 'com.android.support:appcompat-v7:24.2.1'
     implementation 'androidx.appcompat:appcompat:1.1.0'
     implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
-
     // ijkplayer
     api 'tv.danmaku.ijk.media:ijkplayer-java:0.7.8.1'
     api 'tv.danmaku.ijk.media:ijkplayer-armv7a:0.7.8.1'
diff --git a/playerview/src/androidTest/java/com/dl7/player/ExampleInstrumentedTest.java b/playerview/src/androidTest/java/com/dl7/player/ExampleInstrumentedTest.java
index 8696517..c3eb106 100644
--- a/playerview/src/androidTest/java/com/dl7/player/ExampleInstrumentedTest.java
+++ b/playerview/src/androidTest/java/com/dl7/player/ExampleInstrumentedTest.java
@@ -1,8 +1,8 @@
 package com.dl7.player;
 
 import android.content.Context;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.runner.AndroidJUnit4;
+import androidx.test.platform.app.InstrumentationRegistry;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -19,7 +19,7 @@ public class ExampleInstrumentedTest {
     @Test
     public void useAppContext() throws Exception {
         // Context of the app under test.
-        Context appContext = InstrumentationRegistry.getTargetContext();
+        Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
 
         assertEquals("com.dl7.playerview.test", appContext.getPackageName());
     }